Gamma-ray Burst 170607A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:21:50 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.343d {+00h 29m 22s} (J2000),
                   7.569d {+00h 30m 17s} (current),
                   6.698d {+00h 26m 47s} (1950)
GRB_DEC:          +9.238d {+09d 14' 16"} (J2000),
                  +9.334d {+09d 20' 03"} (current),
                  +8.962d {+08d 57' 42"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4830 [cnts]    Image_Peak=450 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       20072 [cnts]
BKG_TIME:        84076.81 SOD {23:21:16.81} UT
BKG_DUR:         8 [sec]
GRB_DATE:        17911 TJD;   158 DOY;   17/06/07
GRB_TIME:        84093.71 SOD {23:21:33.71} UT
GRB_PHI:         132.99 [deg]
GRB_THETA:        28.05 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     41.82 [sigma]
IMAGE_SIGNIF:    16.32 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +4  +0  +0 -39  +0 
SUN_POSTN:        76.30d {+05h 05m 11s}  +22.84d {+22d 50' 18"}
SUN_DIST:         66.87 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.03d {+15h 56m 06s}  -15.29d {-15d 17' 34"}
MOON_DIST:       129.48 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.81,-53.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       10.40,  5.57 [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 = 87.02,14.75 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:18:25 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      49
TRIGGER_NUM:     518570284
GRB_RA:           11.783d {+00h 47m 08s} (J2000),
                  12.011d {+00h 48m 03s} (current),
                  11.131d {+00h 44m 31s} (1950)
GRB_DEC:         +12.467d {+12d 28' 00"} (J2000),
                 +12.562d {+12d 33' 42"} (current),
                 +12.194d {+12d 11' 38"} (1950)
GRB_ERROR:       11.88 [deg radius, statistical plus systematic]
GRB_INTEN:       434 [cnts/sec]
DATA_SIGNIF:     17.60 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        17911 TJD;   158 DOY;   17/06/07
GRB_TIME:        83879.57 SOD {23:17:59.57} UT
GRB_PHI:          41.00 [deg]
GRB_THETA:       120.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      1.41
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      92%  GRB
2nd_MOST_LIKELY:   5%  Distant Particles
DETECTORS:       0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        76.29d {+05h 05m 10s}  +22.84d {+22d 50' 18"}
SUN_DIST:         61.66 [deg]   Sun_angle= 4.3 [hr] (West of Sun)
MOON_POSTN:      239.00d {+15h 55m 59s}  -15.29d {-15d 17' 13"}
MOON_DIST:       134.40 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      121.28,-50.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       15.71,  6.82 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170607971/quicklook/glg_lc_medres34_bn170607971.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 228.43,19.70 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the CALET_GBM event (trignum=1180912206).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:18:33 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     518570284
GRB_RA:            7.350d {+00h 29m 24s} (J2000),
                   7.574d {+00h 30m 18s} (current),
                   6.707d {+00h 26m 50s} (1950)
GRB_DEC:          +3.983d {+03d 58' 60"} (J2000),
                  +4.080d {+04d 04' 46"} (current),
                  +3.707d {+03d 42' 25"} (1950)
GRB_ERROR:       5.83 [deg radius, statistical plus systematic]
GRB_INTEN:       459 [cnts/sec]
DATA_SIGNIF:     31.10 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        17911 TJD;   158 DOY;   17/06/07
GRB_TIME:        83879.57 SOD {23:17:59.57} UT
GRB_PHI:          52.00 [deg]
GRB_THETA:       120.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.50
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      87%  GRB
2nd_MOST_LIKELY:  11%  Distant Particles
DETECTORS:       0,1,1, 0,0,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        76.29d {+05h 05m 10s}  +22.84d {+22d 50' 18"}
SUN_DIST:         68.82 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.00d {+15h 56m 00s}  -15.29d {-15d 17' 14"}
MOON_DIST:       128.22 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      112.39,-58.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        8.32,  0.74 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170607971/quicklook/glg_lc_medres34_bn170607971.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 228.43,19.70 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the CALET_GBM event (trignum=1180912206).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:18:38 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     518570284
GRB_RA:            9.480d {+00h 37m 55s} (J2000),
                   9.706d {+00h 38m 49s} (current),
                   8.834d {+00h 35m 20s} (1950)
GRB_DEC:          +7.770d {+07d 46' 12"} (J2000),
                  +7.866d {+07d 51' 57"} (current),
                  +7.495d {+07d 29' 43"} (1950)
GRB_ERROR:       1.53 [deg radius, statistical only]
DATA_SIGNIF:     43.60 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        17911 TJD;   158 DOY;   17/06/07
GRB_TIME:        83879.57 SOD {23:17:59.57} UT
GRB_PHI:          47.00 [deg]
GRB_THETA:       120.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4153 (Gnd S/W Version number)
SUN_POSTN:        76.29d {+05h 05m 10s}  +22.84d {+22d 50' 18"}
SUN_DIST:         65.43 [deg]   Sun_angle= 4.4 [hr] (West of Sun)
MOON_POSTN:      239.00d {+15h 56m 00s}  -15.29d {-15d 17' 14"}
MOON_DIST:       131.24 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      117.10,-54.95 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       11.76,  3.39 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2017/bn170607971/quicklook/glg_lc_medres34_bn170607971.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_518570284.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(3.0<100sec) coincident with the CALET_GBM event (trignum=1180912206).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:23:16 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.3655d {+00h 29m 27.71s} (J2000),
                   7.5909d {+00h 30m 21.82s} (current),
                   6.7195d {+00h 26m 52.68s} (1950)
GRB_DEC:          +9.2425d {+09d 14' 32.9"} (J2000),
                  +9.3387d {+09d 20' 19.4"} (current),
                  +8.9662d {+08d 57' 58.3"} (1950)
GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       5.32e-09 [erg/cm2/sec]
GRB_SIGNIF:      12.64 [sigma]
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84167.11 SOD {23:22:47.11} UT,   73.4 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.23 261.62 243.61
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:        76.30d {+05h 05m 11s}  +22.84d {+22d 50' 19"}
SUN_DIST:         66.84 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.04d {+15h 56m 09s}  -15.30d {-15d 17' 43"}
MOON_DIST:       129.49 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.85,-53.24 [deg] galactic lon,lat of the burst
ECL_COORDS:       10.42,  5.57 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.33 arcmin from the BAT position.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:23:26 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.3655d {+00h 29m 27.7s} (J2000),
                   7.5909d {+00h 30m 21.8s} (current),
                   6.7195d {+00h 26m 52.6s} (1950)
GRB_DEC:          +9.2425d {+09d 14' 32.9"} (J2000),
                  +9.3387d {+09d 20' 19.4"} (current),
                  +8.9662d {+08d 57' 58.3"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       160 [cnts]
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84167.11 SOD {23:22:47.11} UT,   73.4 [sec] since BAT Trigger Time
CENTROID_X:      296.60,  raw= 297  [pixels]
CENTROID_Y:      292.17,  raw= 292  [pixels]
ROLL:            69.01 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -14.67
GRB_POS_XRT_Z:   -23.09
IMAGE_URL:       sw00756284000msxps_rw.img
SUN_POSTN:        76.30d {+05h 05m 11s}  +22.84d {+22d 50' 19"}
SUN_DIST:         66.84 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.04d {+15h 56m 09s}  -15.30d {-15d 17' 44"}
MOON_DIST:       129.49 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.85,-53.24 [deg] galactic lon,lat of the burst
ECL_COORDS:       10.42,  5.57 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:23:29 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.3655d {+00h 29m 27.7s} (J2000),
                   7.5909d {+00h 30m 21.8s} (current),
                   6.7195d {+00h 26m 52.6s} (1950)
GRB_DEC:          +9.2425d {+09d 14' 32.9"} (J2000),
                  +9.3387d {+09d 20' 19.4"} (current),
                  +8.9662d {+08d 57' 58.3"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       160 [cnts]
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84167.11 SOD {23:22:47.11} UT,   73.4 [sec] since BAT Trigger Time
CENTROID_X:      296.60,  raw= 297  [pixels]
CENTROID_Y:      292.17,  raw= 292  [pixels]
ROLL:            69.01 [deg]
GAIN:            2
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -14.67
GRB_POS_XRT_Z:   -23.09
IMAGE_URL:       sw00756284000msxps_rw.img
SUN_POSTN:        76.30d {+05h 05m 11s}  +22.84d {+22d 50' 19"}
SUN_DIST:         66.84 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.04d {+15h 56m 09s}  -15.30d {-15d 17' 44"}
MOON_DIST:       129.49 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.85,-53.24 [deg] galactic lon,lat of the burst
ECL_COORDS:       10.42,  5.57 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.  
COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:24:55 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.343d {+00h 29m 22s} (J2000),
                   7.569d {+00h 30m 17s} (current),
                   6.698d {+00h 26m 47s} (1950)
GRB_DEC:          +9.238d {+09d 14' 16"} (J2000),
                  +9.334d {+09d 20' 03"} (current),
                  +8.962d {+08d 57' 42"} (1950)
GRB_DATE:        17911 TJD;   158 DOY;   17/06/07
GRB_TIME:        84093.71 SOD {23:21:33.71} UT
TRIGGER_INDEX:   146
GRB_PHI:         132.99 [deg]
GRB_THETA:        28.05 [deg]
DELTA_TIME:      71.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     41.82 [sigma]
IMAGE_SIGNIF:    16.32 [sigma]
LC_URL:          sw00756284000msb.lc
SUN_POSTN:        76.30d {+05h 05m 12s}  +22.84d {+22d 50' 19"}
SUN_DIST:         66.87 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.05d {+15h 56m 12s}  -15.30d {-15d 17' 53"}
MOON_DIST:       129.46 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.81,-53.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       10.40,  5.57 [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 = 87.02,14.75 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:25:53 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.357d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.244d {+09d 14' 39"} (J2000)
POINT_ROLL:      69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84177.16 SOD {23:22:57.16} UT,   83.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.677
N_STARS:         27
X_OFFSET:        515 [pixels]
Y_OFFSET:        556 [pixels]
X_MAX:           1474 [pixels]
Y_MAX:           1515 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00756284000msufc0083.fits
SUN_POSTN:        76.30d {+05h 05m 12s}  +22.84d {+22d 50' 19"}
SUN_DIST:         66.85 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.06d {+15h 56m 14s}  -15.30d {-15d 18' 00"}
MOON_DIST:       129.47 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.83,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:26:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.357d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.244d {+09d 14' 39"} (J2000)
POINT_ROLL:      69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84177.16 SOD {23:22:57.16} UT,   83.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.677
N_STARS:         27
X_OFFSET:        515 [pixels]
Y_OFFSET:        556 [pixels]
X_MAX:           1474 [pixels]
Y_MAX:           1515 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00756284000msufc0083.fits
SUN_POSTN:        76.30d {+05h 05m 12s}  +22.84d {+22d 50' 19"}
SUN_DIST:         66.85 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.06d {+15h 56m 15s}  -15.30d {-15d 18' 01"}
MOON_DIST:       129.46 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.83,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:27:48 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.357d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.244d {+09d 14' 39"} (J2000)
ROLL:            69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84177.16 SOD {23:22:57.16} UT,   83.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     518570596
X_OFFSET:        835 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       995
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00756284000msuni0103.fits
SUN_POSTN:        76.30d {+05h 05m 12s}  +22.84d {+22d 50' 20"}
SUN_DIST:         66.85 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.08d {+15h 56m 18s}  -15.30d {-15d 18' 11"}
MOON_DIST:       129.45 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.83,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:27:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.357d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.244d {+09d 14' 39"} (J2000)
ROLL:            69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84177.16 SOD {23:22:57.16} UT,   83.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     518570596
X_OFFSET:        835 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       995
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00756284000msuni0103.fits
SUN_POSTN:        76.30d {+05h 05m 12s}  +22.84d {+22d 50' 20"}
SUN_DIST:         66.85 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.08d {+15h 56m 18s}  -15.30d {-15d 18' 12"}
MOON_DIST:       129.45 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.83,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:29:12 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.3658d {+00h 29m 27.79s} (J2000),
                   7.5912d {+00h 30m 21.89s} (current),
                   6.7198d {+00h 26m 52.75s} (1950)
GRB_DEC:          +9.2433d {+09d 14' 35.8"} (J2000),
                  +9.3395d {+09d 20' 22.3"} (current),
                  +8.9670d {+08d 58' 01.1"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         15.89 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84174.00 SOD {23:22:54.00} UT,   80.3 [sec] since BAT Trigger Time
SUN_POSTN:        76.30d {+05h 05m 12s}  +22.84d {+22d 50' 20"}
SUN_DIST:         66.85 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.09d {+15h 56m 21s}  -15.31d {-15d 18' 20"}
MOON_DIST:       129.45 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.85,-53.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       10.42,  5.57 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 3.2 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #21214
A. D'Ai (INAF-IASFPA), D. N. Burrows (PSU), A. Cholden-Brown (PSU), V. D'Elia (ASDC), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 23:21:33 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 170607A (trigger=756284). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 7.343, +9.238 which is
```
   RA(J2000) = 00h 29m 22s
   Dec(J2000) = +09d 14' 16"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED structure with a duration of about 40 sec. The peak count rate was ~4000 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 23:22:47.1 UT, 73.4 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 7.3655, 9.2425 which is equivalent to:
```
   RA(J2000)  = +00h 29m 27.72s
   Dec(J2000) = +09d 14' 33.0"
```
with an uncertainty of 4.8 arcseconds (radius, 90% containment). This location is 81 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
The initial flux in the 2.5 s image was 5.32e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 83 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	00:29:27.80 =	7.36582
  DEC(J2000) = +09:14:36.2  =	9.24339
```
with a 90%-confidence error radius of about 0.61 arc sec. This position is 3.4 arc sec. from the center of the XRT error circle. The estimated magnitude is 15.90 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.04.
Burst Advocate for this burst is A. D'Ai (antonino.dai AT ifc.inaf.it). 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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:33:24 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
POINT_ROLL:      69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84389.12 SOD {23:26:29.12} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.466
N_STARS:         18
X_OFFSET:        515 [pixels]
Y_OFFSET:        556 [pixels]
X_MAX:           1474 [pixels]
Y_MAX:           1515 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00756284000msufc0295.fits
SUN_POSTN:        76.30d {+05h 05m 13s}  +22.84d {+22d 50' 21"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.12d {+15h 56m 29s}  -15.31d {-15d 18' 46"}
MOON_DIST:       129.41 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:33:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
POINT_ROLL:      69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84389.12 SOD {23:26:29.12} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.466
N_STARS:         18
X_OFFSET:        515 [pixels]
Y_OFFSET:        556 [pixels]
X_MAX:           1474 [pixels]
Y_MAX:           1515 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00756284000msufc0295.fits
SUN_POSTN:        76.30d {+05h 05m 13s}  +22.84d {+22d 50' 21"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.12d {+15h 56m 30s}  -15.31d {-15d 18' 48"}
MOON_DIST:       129.41 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:34:47 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
ROLL:            69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84389.12 SOD {23:26:29.12} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     518570808
X_OFFSET:        835 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       995
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00756284000msuni0315.fits
SUN_POSTN:        76.31d {+05h 05m 13s}  +22.84d {+22d 50' 21"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.13d {+15h 56m 32s}  -15.32d {-15d 18' 55"}
MOON_DIST:       129.40 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:34:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
ROLL:            69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84389.12 SOD {23:26:29.12} UT,   295.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     518570808
X_OFFSET:        835 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       995
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00756284000msuni0315.fits
SUN_POSTN:        76.31d {+05h 05m 13s}  +22.84d {+22d 50' 21"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.14d {+15h 56m 32s}  -15.32d {-15d 18' 56"}
MOON_DIST:       129.40 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:41:24 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
POINT_ROLL:      69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84966.18 SOD {23:36:06.18} UT,   872.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.764
N_STARS:         45
X_OFFSET:        275 [pixels]
Y_OFFSET:        316 [pixels]
X_MAX:           1714 [pixels]
Y_MAX:           1755 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00756284000msufc0872.fits
SUN_POSTN:        76.31d {+05h 05m 14s}  +22.84d {+22d 50' 23"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.19d {+15h 56m 45s}  -15.33d {-15d 19' 36"}
MOON_DIST:       129.34 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:41:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
POINT_ROLL:      69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84966.18 SOD {23:36:06.18} UT,   872.5 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.764
N_STARS:         45
X_OFFSET:        275 [pixels]
Y_OFFSET:        316 [pixels]
X_MAX:           1714 [pixels]
Y_MAX:           1755 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00756284000msufc0872.fits
SUN_POSTN:        76.31d {+05h 05m 14s}  +22.84d {+22d 50' 23"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.19d {+15h 56m 46s}  -15.33d {-15d 19' 37"}
MOON_DIST:       129.34 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [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:     Wed 07 Jun 17 23:41:53 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     756284,   Seg_Num: 0
GRB_RA:            7.3665d {+00h 29m 27.96s} (J2000),
                   7.5919d {+00h 30m 22.06s} (current),
                   6.7205d {+00h 26m 52.92s} (1950)
GRB_DEC:          +9.2436d {+09d 14' 36.9"} (J2000),
                  +9.3398d {+09d 20' 23.3"} (current),
                  +8.9673d {+08d 58' 02.2"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84571.00 SOD {23:29:31.00} UT,   477.3 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:        76.31d {+05h 05m 14s}  +22.84d {+22d 50' 23"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.19d {+15h 56m 46s}  -15.33d {-15d 19' 39"}
MOON_DIST:       129.35 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.85,-53.24 [deg] galactic lon,lat of the burst
ECL_COORDS:       10.42,  5.57 [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.  
COMMENTS:        This position was enhanced using UVOT field astrometry.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.11% < P(seren) < 0.58%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:43:23 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
ROLL:            69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84966.18 SOD {23:36:06.18} UT,   872.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     518571385
X_OFFSET:        834 [pixels]
Y_OFFSET:        875 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       994
Y_GRB_POS:       1035
BINNING_INDEX:   1
IM_URL:          sw00756284000msuni0892.fits
SUN_POSTN:        76.31d {+05h 05m 15s}  +22.84d {+22d 50' 23"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.21d {+15h 56m 49s}  -15.33d {-15d 19' 49"}
MOON_DIST:       129.33 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 07 Jun 17 23:43:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     756284,   Seg_Num: 0
POINT_RA:          7.360d {+00h 29m 26s} (J2000)
POINT_DEC:        +9.243d {+09d 14' 36"} (J2000)
ROLL:            69.010d
IMG_START_DATE:  17911 TJD;   158 DOY;   17/06/07
IMG_START_TIME:  84966.18 SOD {23:36:06.18} UT,   872.5 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     518571385
X_OFFSET:        834 [pixels]
Y_OFFSET:        875 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       994
Y_GRB_POS:       1035
BINNING_INDEX:   1
IM_URL:          sw00756284000msuni0892.fits
SUN_POSTN:        76.31d {+05h 05m 15s}  +22.84d {+22d 50' 23"}
SUN_DIST:         66.86 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:      239.21d {+15h 56m 50s}  -15.33d {-15d 19' 50"}
MOON_DIST:       129.33 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:      113.84,-53.24 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       10.41,  5.57 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #21215
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 1379 s of XRT Photon Counting mode data and 1 UVOT images for GRB 170607A, 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 = 7.36612, +9.24329 which is equivalent to:
```
RA (J2000): 00h 29m 27.87s
Dec (J2000): +09d 14' 35.8"
```
with an uncertainty of 1.7 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, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #21216
D.N. Burrows (PSU), A. Cholden-Brown (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), S.L. Gibson (U. Leicester), A. Melandri (INAF-OAB), P. D'Avanzo (INAF-OAB), S. J. LaPorte (PSU) and A. D'Ai report on behalf of the Swift-XRT team:
We have analysed 7.5 ks of XRT data for GRB 170607A (D'Ai et al. GCN Circ. 21214), from 63 s to 19.1 ks after the BAT trigger. The data comprise 395 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN Circ. 21215).
The late-time light curve (from T0+5.1 ks) can be modelled with a power-law decay with a decay index of alpha=0.54 (+/-0.09).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.003 (+0.038, -0.019). The best-fitting absorption column is consistent with the Galactic value of 4.4 x 10^20 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 1.92 (+/-0.08) and a best-fitting absorption column of 7.1 (+1.9, -1.8) x 10^20 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (3.9 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     7.1 (+1.9, -1.8) x 10^20 cm^-2
Galactic foreground: 4.4 x 10^20 cm^-2
Excess significance: 2.5 sigma
Photon index:	     1.92 (+/-0.08)
```
If the light curve continues to decay with a power-law decay index of 0.54, the count rate at T+24 hours will be 0.13 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.3 x 10^-12 (5.0 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/00756284.
This circular is an official product of the Swift-XRT team.
GCN Circular #21217
K.E. Heintz (Univ. of Iceland and DARK/NBI), A. de Ugarte Postigo (IAA-CS= IC, DARK/NBI), and J. Claesen (NOT) report on behalf of a larger collabor= ation,=20
We have observed the field of GRB 170607A (D=E2=80=99Ai et al., GCN 21214= ) with the 2.5m Nordic Optical Telescope at La Palma, Spain. The observat= ions consisted of 3x180s in the Sloan g-, r- and i-bands and were carried= out at a mid-time of 04:23:59 UT (i.e. 5.03 hr after the burst). The bri= ght afterglow is well detected in all the individual frames. From the red= uced and combined images we measure magnitudes of:
```
g(AB) = 18.57 +/- 0.08 mag
r(AB) = 18.36 +/- 0.06 mag
i(AB) = 18.22 +/- 0.05 mag
```
calibrated against nearby SDSS field stars.
We also note the presence of a galaxy at a photometric redshift of 0.632 in the SDSS images, close to the location of the burst, which we identify as a host galaxy candidate.
GCN Circular #21218
R. Hamburg (UAH) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 23:17:59.57 UT on 07 June 2017, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 170607A (trigger 518570284 / 170607971), which was also detected by the Swift/BAT (D'Ai et al. 2017, GCN 21214). The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 100 degrees.
The GBM light curve consists of a sharp peak with a duration (T90) of about 23 s (50-300 keV). The time-averaged spectrum from T0-2.4 s to T0+14.0 s is adequately fit by a power law function with an exponential high-energy cutoff. The power law index is -1.40 +/- 0.04 and the cutoff energy, parameterized as Epeak, is 154 +/- 13 keV.
The event fluence (10-1000 keV) in this time interval is (9.6 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.1 s in the 10-1000 keV band is 15.5 +/- 0.6 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #21219
V. Lipunov, N.Tyurina, V.Kornilov, E.Gorbovskoy, A.Kuznetsov, V.Vladimirov, I.Gorbunov, D.Kuvshinov, A.V.Krylov, P.Balanutsa, V.V.Chazov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
N.M.Budnev, O.Gres, O. Ershova Irkutsk State University
A.Gabovich, V.Yurkov, Yu.Sergienko Blagoveschensk Educational State University, Blagoveschensk
D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias
R.Podesta, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA), National University of San Juan, Argentina
H. Levato, C. Saffe Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE), San Juan, Argentina
MASTER-Tavrida robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Crimea Astronomical station of Lomonosov Moscow State University pointed to the FERMI GRB 170607A error-box (ra=00 37 55 dec=+07 46 10 r=1.53, see Hamburg and Meegan GCN #21218) 25 sec after Fermi GBM notice time and 63 sec after Fermi GBM trigger time at 2017-06-08 23:19:03 UT. This was 150 sec before Swift trigger (D'Ai et al., GCN #21214).
MASTER-Tavrida robotic telescope repointed to Swift BAT error box (D'Ai et al., GCN #21214) 25 sec after Swift Notice Time and 42 sec after Swift trigger at 2017-06-07 23:22:15 UT . We see OT at first image with 10 sec exposition. We have OT light curve starting before maximum (UT_max = ~ 23h 24m) up to 2017-06-08 00:40:52 UT:
UT_max = 23:23:45 +/- 10sec
OT unfiltered magnitude (max) = 16.4 +- 0.1
RA,DEC = 00h 29m 27s.8 + 9d 14m 35s.8 Error = 0.5 arcsec
Position is coincide with UVOT position (D'Ai et al., GCN #21214).
We see rebrighting or plato starting at 2017-06-07 23:52:43 UT (~30 min after Swift trigger).
The message may be cited.
GCN Circular #21220
S.W.K. Emery (UCL-MSSL) and A. D'Ai (INAF-IASFPA) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 170607A 84 s after the BAT trigger (D'Ai et al., GCN Circ. 21214). GRB 170607A was also triggered by Fermi GBM (Hamburg and Meegan GCN Circ. 21218) We detect a fading afterglow consistent with the position given by XRT (Beardmore et al., GCN Circ. 21215) and ground-based optical detections (Heintz et al., GCN Circ. 21217; Lipunov et al., GCN Circ. 21219).
The preliminary UVOT position is:
```
    RA  (J2000) =  00:29:27.82 =   7.36591 (deg.)
    Dec (J2000) = +09:14:36.0  =   9.24334 (deg.)
```
with an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).
Preliminary detections using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white_FC            84          233          147         15.76 +/- 0.02
white              575         5285          461         17.11 +/- 0.03
white             6895         7065          197         17.50 +/- 0.04
v                  625         5696          313         17.51 +/- 0.11
b                  551         1859          132         17.63 +/- 0.09
u_FC               295          545          246         16.14 +/- 0.04
u                  699         6205          210         16.80 +/- 0.06
u                 6454        29372         1601         17.68 +/- 0.04
uvw1               847         6105          313         16.87 +/- 0.06
uvm2              5700         5900          197         16.86 +/- 0.09
uvw2              1720         5491          216         17.04 +/- 0.07
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.04 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #21225
K. E. Heintz (Univ. of Iceland and DARK/NBI), A. de Ugarte Postigo (IAA-C= SIC, DARK/NBI), and S. Schulze (Weizmann Institute) report on behalf of a= larger collaboration,=20
In our previous GCN (Heintz et al., GCN 21217) we reported a possible SDS= S host galaxy at z=3D0.632. We note, however, that this identification wa= s incorrect, as this galaxy lies a few arcseconds away from the GRB after= glow. However, further analysis of SDSS and Pan-STARRS images do show a p= ossible host galaxy lying just 0.=E2=80=9D8 of the afterglow position as = measured by UVOT, with a faintness around the Pan-STARRS r-band detection= limit.
GCN Circular #21230
T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), A. D'Ai (INAF-IASFPA), H. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink, we report further analysis of BAT GRB 170607A (trigger #756284) (D'Ai et al., GCN Circ. 21214). The BAT ground-calculated position is RA, Dec = 7.358, 9.225 deg which is
```
  RA(J2000)  =  00h 29m 26.0s
  Dec(J2000) = +09d 13' 30.8"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 57%.
The mask-weighted light curve show two prominent pulses. The first pulse starts before it came into the BAT FOV at T0-217.9 s during a preplanned spacecraft slew. It peaks at ~T0-210 s and ends at ~T0-190 s. The second pulse starts at ~T0-10 s, peaks at T0, and ends at ~T0+40 s, with a tail lasting till ~T0+140 s.
The time-averaged spectrum from T0-207.896 to T0+144.104 s is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.61 +- 0.07. The fluence in the 15-150 keV band is 7.5 +- 0.3 x 10^-6 erg/cm2. 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/756284/BA/
GCN Circular #21232
V. Sharma and D. Bhattacharya (IUCAA), V. Bhalerao (IIT-B), A. R. Rao (TIFR) and S. Vadawale (PRL) report on behalf of the Astrosat CZTI collaboration:
Routine on-ground analysis of AstroSat CZT Imager data showed the detection of a bright GRB 170607B, which was also detected by Fermi GBM (designation: bn170607946) at 2017-06-07 22:41:58.947 UT.
The source was clearly detected in the 40-200 keV energy range. The light curve shows multiple peaks of emission with the strongest peak at 22:42:04.947 UT, ~6 s after the Fermi Trigger. The measured peak count rate is 496.1 cts/s above the background in combined data of four quadrants, with a total of 7677 cts. The local mean background count rate was 354.9 cts/s. Using cumulative rates, we measure a T90 of 21.8 s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range.
CZTI GRB detections are reported regularly on the payload site at http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC and PRL. The Indian Space Research Organisation funded, managed and facilitated the project.
GCN Circular #21237
A. Volnova (IKI), A. Pozanenko (IKI), V. Agletdinov (KIAM), E. Mazaeva (IKI), A. Mokhnatkin (KIAM), I. Molotov (KIAM) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 170607A (D=E2=80=99Ai et al., GCN 21214) with K-800 (0.8m) telescope of ISON/Terskol observatory starting on June, 08 (UT) 23:23:04, about 1 day after the burst onset. We obtained several unfiltered images of 20 s exposure. The optical afterglow (D=E2=80=99Ai et al., GCN 21214; Heintz et al., GCN 21217; Lipunov et al., GCN 21220) is still bright and clearly visible in a combined image. Preliminary photometry of the afterglow is following
```
Date       UT start  t-T0   Filter  Exp.   OT    Err. UL
                      (mid, days)     (s)

2017-06-08 22:21:31 1.01959 CR      128*20 18.50 0.28 18.90
```
Photometry is based on nearby SDSS DR9 stars
```
SDSS id                   R_Lupton
J002930.50+091415.3       16.314
J002920.28+091527.1       15.963
J002925.73+091637.7       14.803
```
GCN Circular #21240
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), L. Izzo (IAA-CSIC),=20 C.C. Thoene (IAA-CSIC), Z. Cano (IAA-CSIC), D. A. Kann (IAA-CSIC),=20 R. Scarpa (GTC), and V. Herrera (GTC) report on behalf of a larger=20 collaboration:
We observed the afterglow of GRB 170607A (D=E2=80=99Ai et al. GCN 21214,=20 Heintz et al. GCN 21217, Lipunov et al. GCN 21219, Volnova et al.=20 GCN 21237) using OSIRIS at the 10.4m GTC telescope. Observation=20 consisted of 3x900s using grism R1000R, which covers the range=20 between 5100 and 10100 =C3=85, at a mean epoch of 10.1955 June 2017=20 UT (2.2222 days after the GRB).
The acquisition image still shows a bright afterglow at r(AB) =3D 20.70=20 +/- 0.05 mag, as compared to SDSS field stars. In spite of the strong=20 contribution from the afterglow, no clear absorption features can be=20 detected in this spectral range. However, there are strong emission=20 lines due to [OII], [OIII], and H-beta at a common redshift of 0.557,=20 which we identify as the redshift of the GRB.
GCN Circular #21259
S. Nakahira (RIKEN), A. Yoshida, T. Sakamoto, Y. Kawakubo, M. Moriyama, Y. Yamada, A. Tezuka, S. Matsukawa (AGU), K. Yamaoka (Nagoya U), I. Takahashi (IPMU), Y. Asaoka, S. Ozawa, S. Torii (Waseda U), Y. Shimizu, T. Tamura (Kanagawa U), W. Ishizaki (ICRR), M. L. Cherry (LSU), S. Ricciarini (U of Florence), A. V. Penacchioni, P. S. Marrocchesi (U of Siena) and the CALET collaboration:
The long-duration GRB 170607A (D'Ai et al., GCN Circ. 21214; Hamburg et al., GCN Circ. 21218; INTEGRAL SPI-ACS trigger #7864) triggered the CALET Gamma-ray Burst Monitor (CGBM) at 23:17:56.98 on 7 June 2017. The burst signal was seen only by the SGM instrument.
The light curve of the SGM shows two distinct peaks. The first peak starts at T+2 sec, peaks at T+4 sec and ends at T+8 sec. The second peak starts at T+210 sec, peaks at T+215 sec and ends at T+230 sec. The T90 durations of the first peak and the second peak measured by the SGM data separately are 4.0 +- 0.5 sec and 10.5 +- 0.8 sec (40-1000 keV).
The light curve is available at
http://cgbm.calet.jp/cgbm_trigger/flight/1180912206/
The CALET data used in this analysis are provided by the Waseda CALET Operation Center located at the Waseda University.
GCN Circular #21275
K. P. Mooley (Hintze Fellow, Oxford), T. D. Staley, R. P. Fender (Oxford), G. E. Anderson (Curtin), T. Cantwell (Manchester), D. Titterington, S. H. Carey, J. Hickish, Y. C. Perrott, N. Razavi-Ghods, P. Scott (Cambridge), K. Grainge, A. Scaife (Manchester)
The AMI Large Array robotically triggered on the Swift alert for GRB 170607A (D'Ai et al., GCN 21214) as part of the 4pisky program, and subsequent follow up observations were obtained up to 10 days post-burst. Our observations at 15 GHz on 2016 Jun 08.12, Jun 10.29, Jun 12.28 and Jun 16.24 (UT) do not reveal any radio source at the XRT location (Beardmore et al., GCN 21215), with 3sigma upper limits of 318 uJy, 108 uJy, 117 uJy and 117 uJy respectively.
We thank the AMI staff for scheduling these observations. The AMI-GRB database is a log of all GRB follow up observations with the AMI, and is available at http://4pisky.org/ami-grb/.

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Jochen Greiner, last update: 27-Jun-2017 [Disclaimer]