Gamma-ray Burst 090516

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 16 May 09 08:28:16 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      48
TRIGGER_NUM:     264155280
GRB_RA:          139.350d {+09h 17m 24s} (J2000),
                 139.464d {+09h 17m 51s} (current),
                 138.744d {+09h 14m 58s} (1950)
GRB_DEC:         -10.667d {-10d 39' 59"} (J2000),
                 -10.706d {-10d 42' 21"} (current),
                 -10.456d {-10d 27' 22"} (1950)
GRB_ERROR:       24.88 [deg radius, statistical plus systematic]
GRB_INTEN:       63 [cnts/sec]
DATA_SIGNIF:     5.40 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30478.35 SOD {08:27:58.35} UT
GRB_PHI:         300.00 [deg]
GRB_THETA:        20.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.55
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      79%  GRB
2nd_MOST_LIKELY:  13%  Generic SGR
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        53.28d {+03h 33m 06s}  +19.16d {+19d 09' 40"}
SUN_DIST:         89.96 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      316.97d {+21h 07m 53s}  -15.30d {-15d 17' 53"}
MOON_DIST:       153.88 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.56, 25.83 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      145.43,-25.12 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 140.80,-22.32 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 16 May 09 08:28:45 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      83
TRIGGER_NUM:     264155280
GRB_RA:          139.350d {+09h 17m 24s} (J2000),
                 139.470d {+09h 17m 53s} (current),
                 138.709d {+09h 14m 50s} (1950)
GRB_DEC:          +0.083d {+00d 04' 60"} (J2000),
                  +0.044d {+00d 02' 37"} (current),
                  +0.294d {+00d 17' 37"} (1950)
GRB_ERROR:       23.12 [deg radius, statistical plus systematic]
GRB_INTEN:       86 [cnts/sec]
DATA_SIGNIF:     5.60 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30478.35 SOD {08:27:58.35} UT
GRB_PHI:         297.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      1.41
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        53.28d {+03h 33m 06s}  +19.16d {+19d 09' 40"}
SUN_DIST:         86.39 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      316.98d {+21h 07m 54s}  -15.30d {-15d 17' 47"}
MOON_DIST:       164.55 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      231.49, 32.00 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      141.74,-14.94 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 140.80,-22.32 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 16 May 09 08:28:48 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      87
TRIGGER_NUM:     264155280
GRB_RA:          139.483d {+09h 17m 56s} (J2000),
                 139.603d {+09h 18m 25s} (current),
                 138.844d {+09h 15m 23s} (1950)
GRB_DEC:          -0.517d {-00d 30' 59"} (J2000),
                  -0.556d {-00d 33' 22"} (current),
                  -0.306d {-00d 18' 20"} (1950)
GRB_ERROR:       14.97 [deg radius, statistical plus systematic]
GRB_INTEN:       79 [cnts/sec]
DATA_SIGNIF:     6.50 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30478.35 SOD {08:27:58.35} UT
GRB_PHI:         297.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.59
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      84%  GRB
2nd_MOST_LIKELY:  13%  Generic SGR
DETECTORS:       1,0,0, 1,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        53.28d {+03h 33m 06s}  +19.16d {+19d 09' 40"}
SUN_DIST:         86.71 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
MOON_POSTN:      316.98d {+21h 07m 54s}  -15.30d {-15d 17' 47"}
MOON_DIST:       163.94 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      232.17, 31.79 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      142.07,-15.47 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 140.80,-22.32 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 16 May 09 08:29:03 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     264155280
GRB_RA:          125.360d {+08h 21m 26s} (J2000),
                 125.476d {+08h 21m 54s} (current),
                 124.743d {+08h 18m 58s} (1950)
GRB_DEC:          -5.900d {-05d 54' 00"} (J2000),
                  -5.930d {-05d 55' 48"} (current),
                  -5.740d {-05d 44' 23"} (1950)
GRB_ERROR:       21.39 [deg radius, statistical only]
DATA_SIGNIF:     5.30 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30478.35 SOD {08:27:58.35} UT
GRB_PHI:         326.00 [deg]
GRB_THETA:        30.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:        53.28d {+03h 33m 06s}  +19.16d {+19d 09' 41"}
SUN_DIST:         75.33 [deg]   Sun_angle= -4.8 [hr] (East of Sun)
MOON_POSTN:      316.98d {+21h 07m 55s}  -15.30d {-15d 17' 44"}
MOON_DIST:       155.91 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      229.02, 16.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      129.30,-24.64 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sat 16 May 09 08:29:34 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      86
TRIGGER_NUM:     264155280
GRB_RA:          134.520d {+08h 58m 05s} (J2000),
                 134.639d {+08h 58m 33s} (current),
                 133.886d {+08h 55m 33s} (1950)
GRB_DEC:          -1.860d {-01d 51' 35"} (J2000),
                  -1.897d {-01d 53' 47"} (current),
                  -1.666d {-01d 39' 56"} (1950)
GRB_ERROR:       11.55 [deg radius, statistical only]
DATA_SIGNIF:     6.30 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30478.35 SOD {08:27:58.35} UT
GRB_PHI:         305.00 [deg]
GRB_THETA:        40.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:        53.28d {+03h 33m 06s}  +19.16d {+19d 09' 41"}
SUN_DIST:         82.48 [deg]   Sun_angle= -5.4 [hr] (East of Sun)
MOON_POSTN:      316.98d {+21h 07m 56s}  -15.29d {-15d 17' 38"}
MOON_DIST:       162.65 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      230.42, 26.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      137.56,-18.26 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN/BACODINE POSITION NOTICE

TITLE:        GCN/SIMBAD_NED NOTICE
NOTICE_DATE:  Sat May 16 08:29:20 UTC 2009
NOTICE_TYPE:  Swift-BAT Position search
TRIGGER_NUM:  352190
RA:           138.2707 (J2000)
DEC:          -11.8577 (J2000)
 
SIMBAD search for BAT_RA,Dec=138.2707,-11.8577,radius=10.0arcmin
 
Num   RA         Dec                    Name                        Type  Num_Pub  Distance

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:29:16 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     352190,   Seg_Num: 0
GRB_RA:          138.271d {+09h 13m 05s} (J2000),
                 138.383d {+09h 13m 32s} (current),
                 137.669d {+09h 10m 41s} (1950)
GRB_DEC:         -11.858d {-11d 51' 27"} (J2000),
                 -11.897d {-11d 53' 47"} (current),
                 -11.651d {-11d 39' 02"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       100540 [cnts]    Image_Peak=554 [image_cnts]
TRIGGER_DUR:     26.880 [sec] 
TRIGGER_INDEX:   493     E_range: 50-350 keV
BKG_INTEN:       226336 [cnts]
BKG_TIME:        30363.25 SOD {08:26:03.25} UT
BKG_DUR:         64 [sec]
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30470.77 SOD {08:27:50.77} UT
GRB_PHI:         -164.27 [deg]
GRB_THETA:        58.17 [deg]
SOLN_STATUS:     0x20000003
RATE_SIGNIF:     14.10 [sigma]
IMAGE_SIGNIF:    8.83 [sigma]
MERIT_PARAMS:     +1  +0  +0  +5  +3  -1  +0  +0  +0  +0 
SUN_POSTN:        53.28d {+03h 33m 06s}  +19.16d {+19d 09' 41"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      316.98d {+21h 07m 55s}  -15.30d {-15d 17' 42"}
MOON_DIST:       152.77 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.89, 24.27 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      144.76,-26.59 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 187.80,16.07 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is temporally(8.0<100sec) coincident with the FERMI_GBM event (trignum=264155280).

GCN NOTICE

TITLE:        GCN/SIMBAD_NED NOTICE
NOTICE_DATE:  Sat May 16 08:31:09 UTC 2009
NOTICE_TYPE:  Swift-XRT Position search
TRIGGER_NUM:  352190
RA:           138.2624 (J2000)
DEC:          -11.8544 (J2000)
 
SIMBAD search for XRT_RA,Dec=138.2624,-11.8544,radius=1.0arcmin
 
Num   RA         Dec                    Name                        Type  Num_Pub  Distance

 
NED search for XRT_RA,Dec=138.2624,-11.8544,radius=1.0arcmin
 
Num    RA           Dec       Name                           Type      Distance

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:31:16 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     352190,   Seg_Num: 0
GRB_RA:          138.2624d {+09h 13m 02.9s} (J2000),
                 138.3752d {+09h 13m 30.0s} (current),
                 137.6607d {+09h 10m 38.5s} (1950)
GRB_DEC:         -11.8544d {-11d 51' 15.8"} (J2000),
                 -11.8934d {-11d 53' 36.1"} (current),
                 -11.6476d {-11d 38' 51.4"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       34 [cnts]
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30637.43 SOD {08:30:37.43} UT,   166.7 [sec] since BAT Trigger Time
CENTROID_X:      282.49,  raw= 282  [pixels]
CENTROID_Y:      300.38,  raw= 300  [pixels]
ROLL:            289.76 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   5.62
GRB_POS_XRT_Z:   -46.67
IMAGE_URL:       sw00352190000msxps_rw.img
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 42"}
SUN_DIST:         89.35 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.00d {+21h 07m 59s}  -15.29d {-15d 17' 20"}
MOON_DIST:       152.78 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.89, 24.26 [deg] galactic lon,lat of the burst
ECL_COORDS:      144.75,-26.59 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:31:23 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     352190,   Seg_Num: 0
GRB_RA:          138.2624d {+09h 13m 02.9s} (J2000),
                 138.3752d {+09h 13m 30.0s} (current),
                 137.6607d {+09h 10m 38.5s} (1950)
GRB_DEC:         -11.8544d {-11d 51' 15.8"} (J2000),
                 -11.8934d {-11d 53' 36.1"} (current),
                 -11.6476d {-11d 38' 51.4"} (1950)
GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       34 [cnts]
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30637.43 SOD {08:30:37.43} UT,   166.7 [sec] since BAT Trigger Time
CENTROID_X:      282.49,  raw= 282  [pixels]
CENTROID_Y:      300.38,  raw= 300  [pixels]
ROLL:            289.76 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   5.62
GRB_POS_XRT_Z:   -46.67
IMAGE_URL:       sw00352190000msxps_rw.img
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 42"}
SUN_DIST:         89.35 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.00d {+21h 07m 59s}  -15.29d {-15d 17' 18"}
MOON_DIST:       152.78 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.89, 24.26 [deg] galactic lon,lat of the burst
ECL_COORDS:      144.75,-26.59 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:31:56 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     352190,   Seg_Num: 0
GRB_RA:          138.271d {+09h 13m 05s} (J2000),
                 138.383d {+09h 13m 32s} (current),
                 137.669d {+09h 10m 41s} (1950)
GRB_DEC:         -11.858d {-11d 51' 27"} (J2000),
                 -11.897d {-11d 53' 47"} (current),
                 -11.651d {-11d 39' 02"} (1950)
GRB_DATE:        14967 TJD;   136 DOY;   09/05/16
GRB_TIME:        30470.77 SOD {08:27:50.77} UT
TRIGGER_INDEX:   493
GRB_PHI:         -164.27 [deg]
GRB_THETA:        58.17 [deg]
DELTA_TIME:      -31.00 [sec]
TRIGGER_DUR:     26.880 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     14.10 [sigma]
IMAGE_SIGNIF:    8.83 [sigma]
LC_URL:          sw00352190000msb.lc
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 42"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.00d {+21h 08m 00s}  -15.29d {-15d 17' 12"}
MOON_DIST:       152.78 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.89, 24.27 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      144.76,-26.59 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 187.80,16.07 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:31:06 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     352190,   Seg_Num: 0
GRB_RA:          138.2624d {+09h 13m 02.97s} (J2000),
                 138.3752d {+09h 13m 30.04s} (current),
                 137.6607d {+09h 10m 38.55s} (1950)
GRB_DEC:         -11.8544d {-11d 51' 15.8"} (J2000),
                 -11.8934d {-11d 53' 36.1"} (current),
                 -11.6476d {-11d 38' 51.4"} (1950)
GRB_ERROR:       5.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.96e-08 [erg/cm2/sec]
GRB_SIGNIF:      5.83 [sigma]
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30637.43 SOD {08:30:37.43} UT,   166.7 [sec] since BAT Trigger Time
TAM[0-3]:        327.64 237.25 261.46 243.63
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 42"}
SUN_DIST:         89.35 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.00d {+21h 07m 59s}  -15.29d {-15d 17' 21"}
MOON_DIST:       152.78 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.89, 24.26 [deg] galactic lon,lat of the burst
ECL_COORDS:      144.75,-26.59 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.52 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:33:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.273d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.859d {-11d 51' 30"} (J2000)
POINT_ROLL:      289.764d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30647.05 SOD {08:30:47.05} UT,   176.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.203
N_STARS:         66
X_OFFSET:        496 [pixels]
Y_OFFSET:        528 [pixels]
X_MAX:           1455 [pixels]
Y_MAX:           1487 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00352190000msufc0176.fits
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 43"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.02d {+21h 08m 04s}  -15.28d {-15d 16' 53"}
MOON_DIST:       152.79 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:34:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.273d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.859d {-11d 51' 30"} (J2000)
POINT_ROLL:      289.764d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30647.05 SOD {08:30:47.05} UT,   176.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.203
N_STARS:         66
X_OFFSET:        496 [pixels]
Y_OFFSET:        528 [pixels]
X_MAX:           1455 [pixels]
Y_MAX:           1487 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00352190000msufc0176.fits
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 44"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.02d {+21h 08m 05s}  -15.28d {-15d 16' 46"}
MOON_DIST:       152.79 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:35:06 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.273d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.859d {-11d 51' 30"} (J2000)
ROLL:            289.764d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30647.05 SOD {08:30:47.05} UT,   176.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     264155451
X_OFFSET:        873 [pixels]
Y_OFFSET:        820 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1033
Y_GRB_POS:       980
BINNING_INDEX:   1
IM_URL:          sw00352190000msuni0181.fits
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 44"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.03d {+21h 08m 07s}  -15.28d {-15d 16' 37"}
MOON_DIST:       152.79 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:35:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.273d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.859d {-11d 51' 30"} (J2000)
ROLL:            289.764d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30647.05 SOD {08:30:47.05} UT,   176.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     264155451
X_OFFSET:        873 [pixels]
Y_OFFSET:        820 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1033
Y_GRB_POS:       980
BINNING_INDEX:   1
IM_URL:          sw00352190000msuni0181.fits
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 44"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.03d {+21h 08m 07s}  -15.28d {-15d 16' 32"}
MOON_DIST:       152.79 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:40:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.275d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.857d {-11d 51' 25"} (J2000)
POINT_ROLL:      289.765d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30805.11 SOD {08:33:25.11} UT,   334.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.592
N_STARS:         42
X_OFFSET:        553 [pixels]
Y_OFFSET:        500 [pixels]
X_MAX:           1512 [pixels]
Y_MAX:           1459 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00352190000msufc0334.fits
SUN_POSTN:        53.28d {+03h 33m 08s}  +19.16d {+19d 09' 47"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.07d {+21h 08m 17s}  -15.26d {-15d 15' 34"}
MOON_DIST:       152.81 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:        GCN/SIMBAD_NED NOTICE
NOTICE_DATE:  Sat May 16 08:43:26 UTC 2009
NOTICE_TYPE:  Swift-XRT Position search
TRIGGER_NUM:  352190
RA:           138.2611 (J2000)
DEC:          -11.8547 (J2000)
 
SIMBAD search for XRT_RA,Dec=138.2611,-11.8547,radius=1.0arcmin
 
Num   RA         Dec                    Name                        Type  Num_Pub  Distance

 
 
 
NED search for XRT_RA,Dec=138.2611,-11.8547,radius=1.0arcmin
 
Num    RA           Dec       Name                           Type      Distance

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:41:11 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.275d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.857d {-11d 51' 25"} (J2000)
POINT_ROLL:      289.765d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30805.11 SOD {08:33:25.11} UT,   334.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.592
N_STARS:         42
X_OFFSET:        553 [pixels]
Y_OFFSET:        500 [pixels]
X_MAX:           1512 [pixels]
Y_MAX:           1459 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00352190000msufc0334.fits
SUN_POSTN:        53.28d {+03h 33m 08s}  +19.16d {+19d 09' 47"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.08d {+21h 08m 18s}  -15.26d {-15d 15' 29"}
MOON_DIST:       152.81 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:33:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.273d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.859d {-11d 51' 30"} (J2000)
POINT_ROLL:      289.764d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30647.05 SOD {08:30:47.05} UT,   176.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.203
N_STARS:         66
X_OFFSET:        496 [pixels]
Y_OFFSET:        528 [pixels]
X_MAX:           1455 [pixels]
Y_MAX:           1487 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00352190000msufc0176.fits
SUN_POSTN:        53.28d {+03h 33m 07s}  +19.16d {+19d 09' 43"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.02d {+21h 08m 04s}  -15.28d {-15d 16' 53"}
MOON_DIST:       152.79 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:42:03 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.275d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.857d {-11d 51' 25"} (J2000)
ROLL:            289.765d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30805.11 SOD {08:33:25.11} UT,   334.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     264155609
X_OFFSET:        873 [pixels]
Y_OFFSET:        820 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1033
Y_GRB_POS:       980
BINNING_INDEX:   1
IM_URL:          sw00352190000msuni0339.fits
SUN_POSTN:        53.28d {+03h 33m 08s}  +19.16d {+19d 09' 48"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.08d {+21h 08m 20s}  -15.26d {-15d 15' 20"}
MOON_DIST:       152.82 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:42:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.275d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.857d {-11d 51' 25"} (J2000)
ROLL:            289.765d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30805.11 SOD {08:33:25.11} UT,   334.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     264155609
X_OFFSET:        873 [pixels]
Y_OFFSET:        820 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1033
Y_GRB_POS:       980
BINNING_INDEX:   1
IM_URL:          sw00352190000msuni0339.fits
SUN_POSTN:        53.29d {+03h 33m 08s}  +19.16d {+19d 09' 48"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.09d {+21h 08m 21s}  -15.25d {-15d 15' 14"}
MOON_DIST:       152.82 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:43:23 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     352190,   Seg_Num: 0
GRB_RA:          138.2611d {+09h 13m 02.66s} (J2000),
                 138.3739d {+09h 13m 29.73s} (current),
                 137.6594d {+09h 10m 38.24s} (1950)
GRB_DEC:         -11.8547d {-11d 51' 16.9"} (J2000),
                 -11.8937d {-11d 53' 37.1"} (current),
                 -11.6479d {-11d 38' 52.5"} (1950)
GRB_ERROR:       4.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30964.00 SOD {08:36:04.00} UT,   493.2 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        53.29d {+03h 33m 09s}  +19.16d {+19d 09' 49"}
SUN_DIST:         89.34 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.09d {+21h 08m 22s}  -15.25d {-15d 15' 05"}
MOON_DIST:       152.83 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.89, 24.26 [deg] galactic lon,lat of the burst
ECL_COORDS:      144.75,-26.59 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 16 May 09 08:40:43 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     352190,   Seg_Num: 0
POINT_RA:        138.275d {+09h 13m 06s} (J2000)
POINT_DEC:       -11.857d {-11d 51' 25"} (J2000)
POINT_ROLL:      289.765d
IMG_START_DATE:  14967 TJD;   136 DOY;   09/05/16
IMG_START_TIME:  30805.11 SOD {08:33:25.11} UT,   334.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.592
N_STARS:         42
X_OFFSET:        553 [pixels]
Y_OFFSET:        500 [pixels]
X_MAX:           1512 [pixels]
Y_MAX:           1459 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00352190000msufc0334.fits
SUN_POSTN:        53.28d {+03h 33m 08s}  +19.16d {+19d 09' 47"}
SUN_DIST:         89.36 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
MOON_POSTN:      317.07d {+21h 08m 17s}  -15.26d {-15d 15' 34"}
MOON_DIST:       152.81 [deg]
MOON_ILLUM:      59 [%]
GAL_COORDS:      241.90, 24.27 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      144.77,-26.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN Circular #9374
B. A. Rowlinson (U Leicester), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), C. Guidorzi (U Ferrara), J. A. Kennea (PSU), P. T. O'Brien (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (INAF-IASFPA) and T. Sakamoto (NASA/UMBC) report on behalf of the Swift Team:
At 08:27:50 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 090516 (trigger=352190). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 138.271, -11.858 which is
```
   RA(J2000) = 09h 13m 05s
   Dec(J2000) = -11d 51' 27"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multiple-peaked structure with a duration of at least 150 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~5 sec after the trigger, with additional prominent peaks at T+35, T+90 and T+135.
The XRT began observing the field at 08:30:37.4 UT, 166.7 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 138.26119, -11.85480 which is equivalent to:
```
   RA(J2000)  = 09h 13m 2.69s
   Dec(J2000) = -11d 51' 17.3"
```
with an uncertainty of 4.1 arcseconds (radius, 90% containment). This location is 36 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 4.47e+20 cm^-2 (Kalberla et al. 2005).
The initial flux in the 0.1 s image was 1.96e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 176 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.05.
Burst Advocate for this burst is B. A. Rowlinson (bar7 AT star.le.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #9375
C. Guidorzi (U. Ferrara), I. A. Steele, A. Melandri, D. Bersier, C.J. Mottram, C.G. Mundell, R.J. Smith (Liverpool JMU), A. Gomboc (U. Ljubljana), P. O'Brien, N. Bannister, N. Tanvir (U. Leicester) on behalf of a large collaboration report:
The 2-m Faulkes Telescope South reacted to the Swift burst GRB 090516 (trigger=352190, Rowlinson et al. GCN 9374).
Observations started about 16.9 min after the trigger time with filters BRi. Within the XRT error circle we found a fading source at the following position (J2000):
```
RA:   09:13:02.62
Dec: -11:51:15.4
```
with an initial approximate magnitude of R~19 at 17 minutes post trigger.
GCN Circular #9376
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 2534 s of XRT Photon Counting mode data and 5 UVOT images for GRB 090516, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 138.26050, -11.85442 which is equivalent to:
```
RA (J2000): 09h 13m 2.52s
Dec (J2000): -11d 51' 15.9"
```
with an uncertainty of 1.5 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, arXiv:0812.3662).
This circular was automatically generated, and is an official product of the Swift-XRT team.

GCN Circular #9377
M. H. Siegel (PSU) and B. A. Rowlinson (Leicester) report on behalf of the Swift/UVOT team.
The Swift/UVOT began observing the field of GRB 090516 171s after the BAT trigger (Beardmore et al., GCN Circ. 9374). Data summed from the first and second orbits does not reveal a source at the refined position of the X-ray afterglow (Beardmore et al., GCN Circ. 9376).
The 3-sigma upper limits for the finding chart (fc) and summed exposures are reported below:

FILTER     T_start(s)  T_stop    Exposure     Mag/3UL
=============================================================
white fc      171        321        147       > 20.85
white        3843       5478        393       > 21.06

v            4254       5890        393       > 19.63

b             585        601         15       > 18.74
b            5073       5273        196       > 20.32

u             329        579        245       > 20.12
u            4868       6384        274       > 20.20

uvw1         4664       6301        393       > 20.36

uvm2         4458       6096        393       > 20.18

uvw2         4049       5685        393       > 20.41
=================================================================

The above magnitudes are not corrected for the Galactic extinction corresponding to a reddening of E_{B-V} = 0.05 (Schlegel et al., 1998, ApJS, 500, 525). The photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).

GCN Circular #9378
B. A. Rowlinson and P. Evans (U Leicester) report on behalf of the Swift-XRT team:
We have analysed 3.0 ks of XRT data for GRB 090516 (Rowlinson et al. GCN Circ. 9374), from 170 s to 6.4 ks after the BAT trigger. The data comprise 327 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 9376).
The light curve can be modelled with a power-law decay with two flares superimposed on it. The initial decay index is alpha=3.27 (+0.11, -0.10). At T+601 (+138, -52) s the decay flattens to an alpha of 0.93 (+0.11, -0.10).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.09 (+/-0.04). The best-fitting absorption column is 1.57 (+0.10, -0.09) x 10^21 cm^-2, in excess of the Galactic value of 4.5 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.09 (+0.13, -0.12) and a best-fitting absorption column of 9.6 (+2.6, -2.5) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.8 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 0.93, the count rate at T+24 hours will be 0.03 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.1 x 10^-12 (1.4 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00352190.
This circular is an official product of the Swift-XRT team.
GCN Circular #9379
J. Gorosabel (IAA-CSIC), de Ugarte Postigo (ESO, Santiago), D. Montes (UCM, Madrid), A. Klutsch (UCM, Madrid), A.J. Castro-Tirado (IAA-CSIC), report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 090516 (Guidorzi et al. GCN 9375) with the 2.5m NOT(+STANCAM) telescope. On May 16.889 UT (12.9 hours post GRB) the afterglow shows an R-band magnitude of R=21.3+/-0.1 against USNO-B1.0 field stars.
GCN Circular #9380
```
SUBJECT: GRB 090516 - Zadko Telescope observations
FROM: D.M Coward at UWA
```
T.P. Vaalsta, Liang Yan, and J. Zadko report on behalf of the Zadko Telescope Team.
T.P. Vaalsta, Liang Yan, J. Zadko, H. Miao, J. Moore, K. Frost, D. Coward, A. Imerito, D. Blair, R. Burman, P. Luckas, S. Gordon, A. Fletcher, A. Ahmet, (University of Western Australia) M. Todd, M. Zadnik (Curtin University) M. Boer, A. Klotz (TAROT)
The 1.0m F/4 Zadko telescope started imaging the field of GRB 090516 (trigger=352190, D. Palmer et al., GCN 9374) 275 minutes after the Swift trigger. A fading source was found within the XRT error circle (GCN 9376). The field was observed for 131 minutes.
Preliminary photometry of unfiltered images taken with an iKon DW436BV camera show the following initial magnitudes of the optical afterglow:
```
tmid(m) Exp. Time    Magnitude
-------------------------------------
275            5s    18.9  +/- 0.5
285           20s    19.5  +/- 0.3
296          200s    20.26 +/- 0.14

Dr David Coward
Senior Research Fellow
School of Physics
University of Western Australia
Crawley WA 6009

Tel: +61 8 6488 4563
Mobile 0423981240
Fax: +61 8 6488 1170
```
GCN Circular #9381
A. de Ugarte Postigo (ESO), J. Gorosabel (IAA/CSIC), D. Malesani, J.P.U. Fynbo (DARK/NBI), A. J. Levan (Univ. Warwick), report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 090516 (Rowlinson et al., GCN 9374; Guidorzi et al., GCN 9375) with the ESO VLT equipped with FORS2. Observations started on 2009 May 16.989 UT (15.1 hr after the GRB). In the acquisition image, the afterglow is well detected with R ~ 21.2, consistent with the NOT measurement (Gorosabel et al., GCN 9379).
Two spectra lasting 30 min each were acquired with the grism 300V, covering the wavelength range 3500-9200 AA. In a preliminary analysis we detect the Lyman limit, a strong Ly-alpha absorption as well as a number of strong absorption lines (SII, OI, CII, SiIV, CIV, AlII etc.) at a redshift of z=3.9.
We acknowledge excellent support from the observing staff in Paranal, in particular Alain Smette, Leo Rivas and Gianni Marconi.
GCN Circular #9382
A. Rossi (Tautenburg), P. Afonso and J. Greiner (both MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 090516 (Swift trigger 352190, B. Rowlinson et al.,GCN #9374) simultaneously in g'r'i'z'JHK with GROND mounted at the 2.2m ESO/MPI telescope at La Silla Observatory (Chile). Observations started on 16 May 2009 at 23:04 UT, 14.6 h after the burst.
We detect the afterglow at a position consistent with the enhanced XRT error circle (A. Beardmore et al., GCN #9376) and NOT (J. Gorosabel et al., GCN #9379) and Faulkes Telescope detections (C. Guidorzi et al., GCN #9375). With an exposure time of 20min in JHK and 25min in griz, preliminary photometry yields the following AB magnitudes:
```
g =23.60 +-0.1
r =21.44 +-0.1
i =20.38 +-0.1
z =19.95 +-0.1
J =19.6  +-0.1
H =19.2  +-0.1
K =19.1  +-0.2
```
The quoted error is statistical only. There is an additional systematic error in the absolute calibration using the GROND zero points and 2MASS field stars which is expected to be in the 0.2 mag range. Quoted magnitudes are not corrected for the galactic foreground extinction corresponding to a reddening of E_(B-V)=0.05.
Preliminary results fitting the SED with Hyperz give for no reddening a z ~ 4.5 and for best fitting solution a photometric redshift of 4.1 +- 0.3, with SMC reddening of A_v = 0.4. This SMC photometric redshift is compatible with VLT's spectroscpic redshift of z = 3.9 (A. de Ugarte Postigo et al. GCN #9381).
GCN Circular #9383
A. de Ugarte Postigo (ESO), J. Gorosabel (IAA/CSIC), D. Malesani, J.P.U. Fynbo (DARK/NBI), A. J. Levan (Univ. Warwick), report on behalf of a larger collaboration:
We have reanalysed the spectrum of the afterglow of GRB090416 (Rowlinson et al., GCN 9374; Guidorzi et al., GCN 9375) obtained with the ESO VLT (de Ugarte Postigo et al. GCN 9381). Due to an error in the preliminary reduction, the wavelength calibration had an offset that has been now corrected.
In our new analysis we detect a strong Ly-alpha absorption together with absorption lines of NV, SII, SiII, NiII, CI, SiIV, CIV, FeII, AlII, AlIII as well as SiII* at a redshift of 4.109+/-0.002, which we identify as the redshift of the afterglow. This is in agreement with the photometric redshift obtained with GROND (Rossi et al. GCN 9382).
The spectrum also shows an intervening system at z=2.697+/-0.002, characterised by the presence of several FeII absorption lines.
GCN Circular #9384
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), B. A. Rowlinson (U Leicester), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 090516 (trigger #352190) (Rowlings, et al., GCN Circ. 9374). The BAT ground-calculated position is RA, Dec = 138.246, -11.848 deg, which is
```
   RA(J2000)  =  09h 12m 59.1s 
   Dec(J2000) = -11d 50' 51.4" 
```
with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 9%.
The mask-weighted light curve shows several overlapping peaks starting at ~T-20 sec witht he last peak at ~T+180 sec, and then decaying to background at ~T+330 sec. The burst went out of the BAT FOV at T+700 sec when Swift did a pre-programmed slew. T90 (15-350 keV) is 210 +- 65 sec (estimated error including systematics).
The time-averaged spectrum from TTBD to TTBD sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.84 +- 0.11. The fluence in the 15-150 keV band is 9.0 +- 0.6 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+7.98 sec in the 15-150 keV band is 1.6 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/352190/BA/
GCN Circular #9391
N. Ohmori, E. Sonoda, K. Kono, H. hayasi, A. Daikyuji, Y. Nisioka, K. Noda, M. Yamauchi (University of Miyazaki)
We have observed the field covering the error circle of GRB090516 (Swift trigger 352190, GCN 9374, Rowlinson et al.) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 11:16:08 UT (1.8 hr after the Swift trigger), under cloudy condition. First image was obtained at 11:17:11 UT (1.8 hr after the Swift trigger).
We have compared our data of 30 sec exposures with the USNO-A2.0 catalog. There is no new source at the reported position.
```
(GCN 9374, B. A. Rowlinson et al. GCN 9375, C. Guidorzi et al. 
 GCN 9376, A. P. Beardmore et al. GCN 9379, J. Gorosabel et al. 
 GCN 9381, A. de Ugarte Postigo et al.)
```
the upper limits are as follows:
```
---------------------------------------------------------------
Start(UT)  End(UT) Num. of frames Limit (mag.)
---------------------------------------------------------------
11:16:08   11:17:11         1         15.6
11:16:08   12:04:00        21         17.7
---------------------------------------------------------------
```
GCN Circular #9396
G. W. Christie (Stardome, New Zealand), A. de Ugarte Postigo (ESO, Chile) and T. Natusch (Stardome, New Zealand) on behalf of a larger collaboration report:
We observed the field of GRB 090516 (Rowlinson et al. GCN 9374) with the Stardome 0.4m telescope located in Auckland (New Zealand) starting at 09:25UT. We used a SG530 filter that transmits wavelengths above 5300 Angstroms and a SBIG ST-L-6303E CCD (KAF-6303E detector). A 9x300s combined exposure with mean epoch 16.4080 May (80 minutes after the burst) shows an object at the position of the afterglow (Guidorzi et al. GCN 9375) measured at R = 20.8 +/- 0.2 as compared to USNO-B1.0 stars. We note that with the GRB at a redshift of 4.1 (de Ugarte Postigo et al. GCN 9383), Ly-alpha falls within the R-band, so that comparison of clear and very broad band filters such as ours with R-band has to be handled with care.
GCN Circular #9415
Sheila McBreen (UCD/MPE) reports on behalf of the Fermi GBM Team:
"At 08:27:58.35 UT on 16 May 2009, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 090516 (trigger 264155280 / 090516353). which was also detected by the Swift-BAT (Rowlinson et al. 2009, GCN 9374). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 20 degrees.
The GBM light curve consists of about five overlapping pulses from T0-50 s to T+120 s. There is continued weak emission until about T0+300 s (8-1000 keV).
Due to a large change in the spacecraft pointing during this long burst, a time averaged spectrum could not be fit. Instead three spectral intervals from -50 to 20 sec, 20 to 60 sec and 60 to 120 seconds were selected.
The first interval was well fit by a power law function with an exponential high energy cutoff. The power law index is -1.51 ( +/-0.11 ) and the cutoff energy, parameterized as Epeak, is 185.6 (+98.4/-42.5) keV.
The second and third intervals are adequately fit by a Band function. The parameters for interval two are alpha = -1.03 (+0.26/-0.31) , Epeak = 51.4 (+20.1, -11.4), beta= -2.1 ( +0.1/-0.2) and for the third interval, alpha = 0.30 (+1.30/ - 0.78), Epeak = 27.87 +/- 5.0), beta = -2.64 +/-0.4.
The sum of the event fluence (8-1000 keV) in these time intervals is (2.3 +/- 0.5)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+28.6 s in the 8-1000 keV band is 5.3 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #9422
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), and T. Ukwatta (GWU)
V. Pal'shin, S. Golenetskii, R.Aptekar, E. Mazets, D. Frederiks, and T. Cline on behalf of the Konus-Wind team, report:
We performed the Konus-Wind and the Swift/BAT joint spectral analysis of GRB 090516A (Swift/BAT trigger #352190: Rowlinson et al., GCN Circ. 9374, Baumgartner et al. GCN Circ. 9384). Since the Konus-Wind observed this GRB in the waiting mode, we only have 3 channel spectral data for the Konus-Wind which cover the energy range from 20 keV to 1.2 MeV. The joint spectral analysis of the Konus-Wind and the Swift/BAT data allows us to derive the broad-band spectral parameters of this burst.
The time interval of the spectral data for each instrument is chosen from T0(BAT)-12.2 to T0(BAT)+96.7 sec where T0(BAT) is the trigger time of BAT at 08:27:50.8 UTC. The energy ranges which we used in the joint spectral analysis are 20-1200 keV and 14-150 keV for the Konus-Wind and the Swift/BAT respectively. The spectral data of two instruments are fitted with the spectral model multiplied by the constant factor to take into account the systematic effective area uncertainties in the response matrices of each instrument.
The spectrum is well fitted with a power-law with exponential cutoff model: dN/dE ~ E^{alpha}*exp(-(2+alpha)*E/Epeak). The constant factors of each instrument agree within 10%. No systematic residual from the best fit model is seen in the spectral data of each instrument. The best fit spectral parameters are: alpha = -1.5 (-0.3/+0.2) and Epeak = 190 (-65/+230) keV (chi2/dof = 54/56). The best fit spectral parameters for the GRB (Band) model fixing beta = -2.5 are: alpha = -1.5 (-0.2/+0.3), and Epeak = 190 (-75/+270) keV (chi2/dof = 55/56). The energy fluence in the 15-1200 keV band calculated by a power-law with exponential cutoff model for this 107.9 sec interval is (1.5 +/- 0.3)x10^-5 erg/cm2.
Assuming z = 4.109 (de Ugarte Postigo et al. GCN Circ. 9383) and a standard cosmology model with H_0 = 71 km/s/Mpc, Omega_M = 0.27, Omega_Lambda = 0.73, the isotropic energy release is E_iso = 6.5 (-1.1/+1.4) x10^53 erg in 1 keV to 10 MeV at the GRB rest frame extrapolating the best Band function fit fixing beta = -2.5.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB090516/
All the quoted errors are at the 90% confidence level.
GCN Report 228.1
GCN_Report 228.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_228_1.pdf by A. Rowlinson at U. of Leicester titled: "Final Results on Swift GRB 090516"
1006.3933 from 22 Jun 10
D.M. Coward et al.: The Zadko Telescope: A Southern Hemisphere Telescope for Optical Transient Searches, Multi-Messenger Astronomy and Education
D.G. Blair, J. Zadko, M. Boer, P. Thierry, E.J. Howell, S. Gordon, A. Ahmat, J. Moore, K. Frost The new 1-m f/4 fast-slew Zadko Telescope was installed in June 2008 about 70 km north of Perth, Western Australia. It is the only metre-class optical facility at this southern latitude between the east coast of Australia and South Africa, and can rapidly image optical transients at a longitude not monitored by other similar facilities. We report on first imaging tests of a pilot program of minor planet searches, and Target of Opportunity observations triggered by the Swift satellite. In 12 months, 6 gamma-ray burst afterglows were detected, with estimated magnitudes; two of them, GRB 090205 (z = 4.65) and GRB 090516 (z = 4.11), are among the most distant optical transients imaged by an Australian telescope. Many asteroids were observed in a systematic 3-month search. In September 2009, an automatic telescope control system was installed, which will be used to link the facility to a global robotic telescope network; future targets will include fast optical transients triggered by highenergy satellites, radio transient detections, and LIGO gravitational wave candidate events. We also outline the importance of the facility as a potential tool for education, training, and public outreach.

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Jochen Greiner, last update: 22-Jun-2010 [Disclaimer]