Gamma-ray Burst 131002A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 06:54:38 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     572721,   Seg_Num: 0
GRB_RA:          253.275d {+16h 53m 06s} (J2000),
                 252.927d {+16h 51m 42s} (current),
                 254.561d {+16h 58m 15s} (1950)
GRB_DEC:         +82.057d {+82d 03' 26"} (J2000),
                 +82.035d {+82d 02' 05"} (current),
                 +82.134d {+82d 08' 03"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1270 [cnts]    Image_Peak=108 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   123     E_range: 25-100 keV
BKG_INTEN:       25449 [cnts]
BKG_TIME:        24844.89 SOD {06:54:04.89} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16567 TJD;   275 DOY;   13/10/02
GRB_TIME:        24861.28 SOD {06:54:21.28} UT
GRB_PHI:         141.95 [deg]
GRB_THETA:        24.10 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.71 [sigma]
IMAGE_SIGNIF:    8.73 [sigma]
MERIT_PARAMS:     +1  +0  +0  -2  +2  -1  +0  +0  +0  +0 
SUN_POSTN:       188.50d {+12h 33m 59s}   -3.66d {-03d 39' 49"}
SUN_DIST:         90.21 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.32d {+10h 25m 17s}   +4.91d {+04d 54' 27"}
MOON_DIST:        86.05 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.89, 30.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       98.30, 74.01 [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 = 132.26,14.49 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 02 Oct 13 06:55:33 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     402389709
GRB_RA:           68.683d {+04h 34m 44s} (J2000),
                  69.023d {+04h 36m 06s} (current),
                  67.453d {+04h 29m 49s} (1950)
GRB_DEC:         +66.400d {+66d 24' 00"} (J2000),
                 +66.428d {+66d 25' 39"} (current),
                 +66.296d {+66d 17' 46"} (1950)
GRB_ERROR:       21.27 [deg radius, statistical plus systematic]
GRB_INTEN:       42 [cnts/sec]
DATA_SIGNIF:     4.60 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16567 TJD;   275 DOY;   13/10/02
GRB_TIME:        24906.99 SOD {06:55:06.99} UT
GRB_PHI:         336.00 [deg]
GRB_THETA:       155.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.80
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      94%  GRB
2nd_MOST_LIKELY:   3%  GRO_J0422_32
DETECTORS:       1,1,0, 0,1,0, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:       188.50d {+12h 33m 59s}   -3.66d {-03d 39' 50"}
SUN_DIST:        104.77 [deg]   Sun_angle= 8.0 [hr] (West of Sun)
MOON_POSTN:      156.33d {+10h 25m 19s}   +4.90d {+04d 54' 17"}
MOON_DIST:        84.43 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      142.77, 12.57 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       78.36, 43.82 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 80.78,-1.78 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(45.0<100sec) coincident with the SWIFT_BAT event (trignum=572721).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Wed 02 Oct 13 06:55:48 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     402389709
GRB_RA:          194.500d {+12h 58m 00s} (J2000),
                 194.677d {+12h 58m 42s} (current),
                 193.858d {+12h 55m 26s} (1950)
GRB_DEC:          -1.290d {-01d 17' 23"} (J2000),
                  -1.364d {-01d 21' 50"} (current),
                  -1.020d {-01d 01' 11"} (1950)
GRB_ERROR:       53.12 [deg radius, statistical only]
DATA_SIGNIF:     5.60 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16567 TJD;   275 DOY;   13/10/02
GRB_TIME:        24906.99 SOD {06:55:06.99} UT
GRB_PHI:         352.00 [deg]
GRB_THETA:        51.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       188.50d {+12h 33m 59s}   -3.66d {-03d 39' 50"}
SUN_DIST:          6.59 [deg]   Sun_angle= -0.4 [hr] (East of Sun)
MOON_POSTN:      156.33d {+10h 25m 19s}   +4.90d {+04d 54' 15"}
MOON_DIST:        38.82 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      306.38, 61.54 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      193.85,  4.53 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(45.0<100sec) coincident with the SWIFT_BAT event (trignum=572721).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 06:56:17 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     572721,   Seg_Num: 0
GRB_RA:          253.2165d {+16h 52m 51.95s} (J2000),
                 252.8686d {+16h 51m 28.46s} (current),
                 254.5020d {+16h 58m 00.48s} (1950)
GRB_DEC:         +82.0566d {+82d 03' 23.7"} (J2000),
                 +82.0343d {+82d 02' 03.3"} (current),
                 +82.1340d {+82d 08' 02.5"} (1950)
GRB_ERROR:       5.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       9.38e-10 [erg/cm2/sec]
GRB_SIGNIF:      6.55 [sigma]
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  24927.99 SOD {06:55:27.99} UT,   66.7 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.27 261.60 243.10
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       188.50d {+12h 33m 59s}   -3.66d {-03d 39' 50"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.33d {+10h 25m 20s}   +4.90d {+04d 54' 10"}
MOON_DIST:        86.05 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.89, 30.83 [deg] galactic lon,lat of the burst
ECL_COORDS:       98.33, 74.01 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.49 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 06:56:27 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     572721,   Seg_Num: 0
GRB_RA:          253.2165d {+16h 52m 51.9s} (J2000),
                 252.8686d {+16h 51m 28.4s} (current),
                 254.5020d {+16h 58m 00.4s} (1950)
GRB_DEC:         +82.0566d {+82d 03' 23.7"} (J2000),
                 +82.0343d {+82d 02' 03.3"} (current),
                 +82.1340d {+82d 08' 02.5"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       43 [cnts]
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  24927.99 SOD {06:55:27.99} UT,   66.7 [sec] since BAT Trigger Time
CENTROID_X:      300.89,  raw= 301  [pixels]
CENTROID_Y:      302.12,  raw= 302  [pixels]
ROLL:            244.50 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   9.73
GRB_POS_XRT_Z:   -6.61
IMAGE_URL:       sw00572721000msxps_rw.img
SUN_POSTN:       188.50d {+12h 33m 59s}   -3.66d {-03d 39' 51"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.34d {+10h 25m 21s}   +4.90d {+04d 54' 08"}
MOON_DIST:        86.05 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.89, 30.83 [deg] galactic lon,lat of the burst
ECL_COORDS:       98.33, 74.01 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 06:56:44 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     572721,   Seg_Num: 0
GRB_RA:          253.2165d {+16h 52m 51.9s} (J2000),
                 252.8686d {+16h 51m 28.4s} (current),
                 254.5020d {+16h 58m 00.4s} (1950)
GRB_DEC:         +82.0566d {+82d 03' 23.7"} (J2000),
                 +82.0343d {+82d 02' 03.3"} (current),
                 +82.1340d {+82d 08' 02.5"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       43 [cnts]
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  24927.99 SOD {06:55:27.99} UT,   66.7 [sec] since BAT Trigger Time
CENTROID_X:      300.89,  raw= 301  [pixels]
CENTROID_Y:      302.12,  raw= 302  [pixels]
ROLL:            244.50 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   9.73
GRB_POS_XRT_Z:   -6.61
IMAGE_URL:       sw00572721000msxps_rw.img
SUN_POSTN:       188.50d {+12h 33m 59s}   -3.66d {-03d 39' 51"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.34d {+10h 25m 21s}   +4.90d {+04d 54' 05"}
MOON_DIST:        86.05 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.89, 30.83 [deg] galactic lon,lat of the burst
ECL_COORDS:       98.33, 74.01 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 07:02:16 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     572721,   Seg_Num: 0
GRB_RA:          253.275d {+16h 53m 06s} (J2000),
                 252.927d {+16h 51m 42s} (current),
                 254.561d {+16h 58m 15s} (1950)
GRB_DEC:         +82.057d {+82d 03' 26"} (J2000),
                 +82.035d {+82d 02' 05"} (current),
                 +82.134d {+82d 08' 03"} (1950)
GRB_DATE:        16567 TJD;   275 DOY;   13/10/02
GRB_TIME:        24861.28 SOD {06:54:21.28} UT
TRIGGER_INDEX:   123
GRB_PHI:         141.95 [deg]
GRB_THETA:        24.10 [deg]
DELTA_TIME:      217.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     15.71 [sigma]
IMAGE_SIGNIF:    8.73 [sigma]
LC_URL:          sw00572721000msb.lc
SUN_POSTN:       188.50d {+12h 34m 00s}   -3.67d {-03d 39' 56"}
SUN_DIST:         90.21 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.38d {+10h 25m 32s}   +4.89d {+04d 53' 08"}
MOON_DIST:        86.07 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.89, 30.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       98.30, 74.01 [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 = 132.26,14.49 [deg].  
COMMENTS:        The 3rd packet (of 3) was missing in the lightcurve data stream.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 07:07:55 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
POINT_ROLL:      244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25151.83 SOD {06:59:11.83} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.593
N_STARS:         122
X_OFFSET:        466 [pixels]
Y_OFFSET:        523 [pixels]
X_MAX:           1425 [pixels]
Y_MAX:           1482 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00572721000msufc0290.fits
SUN_POSTN:       188.50d {+12h 34m 01s}   -3.67d {-03d 40' 02"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.43d {+10h 25m 43s}   +4.87d {+04d 52' 10"}
MOON_DIST:        86.07 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 07:08:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
ROLL:            244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25151.83 SOD {06:59:11.83} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     402389962
X_OFFSET:        786 [pixels]
Y_OFFSET:        843 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       946
Y_GRB_POS:       1003
BINNING_INDEX:   1
IM_URL:          sw00572721000msuni0302.fits
SUN_POSTN:       188.50d {+12h 34m 01s}   -3.67d {-03d 40' 02"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.43d {+10h 25m 44s}   +4.87d {+04d 52' 05"}
MOON_DIST:        86.07 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [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 02 Oct 13 07:08:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
ROLL:            244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25151.83 SOD {06:59:11.83} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     402389962
X_OFFSET:        786 [pixels]
Y_OFFSET:        843 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       946
Y_GRB_POS:       1003
BINNING_INDEX:   1
IM_URL:          sw00572721000msuni0302.fits
SUN_POSTN:       188.50d {+12h 34m 01s}   -3.67d {-03d 40' 02"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.44d {+10h 25m 45s}   +4.87d {+04d 52' 03"}
MOON_DIST:        86.07 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 07:08:34 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     572721,   Seg_Num: 0
GRB_RA:          253.2162d {+16h 52m 51.88s} (J2000),
                 252.8685d {+16h 51m 28.42s} (current),
                 254.5012d {+16h 58m 00.28s} (1950)
GRB_DEC:         +82.0545d {+82d 03' 16.2"} (J2000),
                 +82.0322d {+82d 01' 55.8"} (current),
                 +82.1319d {+82d 07' 54.9"} (1950)
GRB_ERROR:       2.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  24979.00 SOD {06:56:19.00} UT,   117.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       188.50d {+12h 34m 01s}   -3.67d {-03d 40' 02"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.44d {+10h 25m 45s}   +4.87d {+04d 52' 03"}
MOON_DIST:        86.07 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.89, 30.83 [deg] galactic lon,lat of the burst
ECL_COORDS:       98.33, 74.01 [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 1.1% < P(seren) < 2.8%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 07:08:31 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
POINT_ROLL:      244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25151.83 SOD {06:59:11.83} UT,   290.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.593
N_STARS:         122
X_OFFSET:        466 [pixels]
Y_OFFSET:        523 [pixels]
X_MAX:           1425 [pixels]
Y_MAX:           1482 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00572721000msufc0290.fits
SUN_POSTN:       188.50d {+12h 34m 01s}   -3.67d {-03d 40' 02"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.44d {+10h 25m 45s}   +4.87d {+04d 52' 04"}
MOON_DIST:        86.07 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [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 02 Oct 13 07:15:57 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
POINT_ROLL:      244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25731.27 SOD {07:08:51.27} UT,   870.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.622
N_STARS:         190
X_OFFSET:        226 [pixels]
Y_OFFSET:        283 [pixels]
X_MAX:           1665 [pixels]
Y_MAX:           1722 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00572721000msufc0869.fits
SUN_POSTN:       188.51d {+12h 34m 02s}   -3.67d {-03d 40' 09"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.50d {+10h 25m 59s}   +4.85d {+04d 50' 47"}
MOON_DIST:        86.08 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 02 Oct 13 07:16:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
POINT_ROLL:      244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25731.27 SOD {07:08:51.27} UT,   870.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.622
N_STARS:         190
X_OFFSET:        226 [pixels]
Y_OFFSET:        283 [pixels]
X_MAX:           1665 [pixels]
Y_MAX:           1722 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00572721000msufc0869.fits
SUN_POSTN:       188.51d {+12h 34m 02s}   -3.67d {-03d 40' 10"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.50d {+10h 26m 00s}   +4.85d {+04d 50' 43"}
MOON_DIST:        86.08 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [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 02 Oct 13 07:17:40 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
ROLL:            244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25731.27 SOD {07:08:51.27} UT,   870.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     402390542
X_OFFSET:        785 [pixels]
Y_OFFSET:        842 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       945
Y_GRB_POS:       1002
BINNING_INDEX:   1
IM_URL:          sw00572721000msuni0881.fits
SUN_POSTN:       188.51d {+12h 34m 02s}   -3.67d {-03d 40' 11"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.51d {+10h 26m 03s}   +4.84d {+04d 50' 29"}
MOON_DIST:        86.08 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [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 02 Oct 13 07:18:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     572721,   Seg_Num: 0
POINT_RA:        253.209d {+16h 52m 50s} (J2000)
POINT_DEC:       +82.061d {+82d 03' 40"} (J2000)
ROLL:            244.485d
IMG_START_DATE:  16567 TJD;   275 DOY;   13/10/02
IMG_START_TIME:  25731.27 SOD {07:08:51.27} UT,   870.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     402390542
X_OFFSET:        785 [pixels]
Y_OFFSET:        842 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       945
Y_GRB_POS:       1002
BINNING_INDEX:   1
IM_URL:          sw00572721000msuni0881.fits
SUN_POSTN:       188.51d {+12h 34m 02s}   -3.67d {-03d 40' 12"}
SUN_DIST:         90.20 [deg]   Sun_angle= -4.3 [hr] (East of Sun)
MOON_POSTN:      156.52d {+10h 26m 04s}   +4.84d {+04d 50' 24"}
MOON_DIST:        86.08 [deg]
MOON_ILLUM:      8 [%]
GAL_COORDS:      114.90, 30.83 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       98.33, 74.01 [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 #15282
C. Guidorzi (U. Ferrara) on behalf of a large collaboration reports:
The 2-m Faulkes Telescope North automatically began observing GRB 131002A on October 02 2013 at 06:57:26 UT (~3.1 min after the burst trigger).
Within the XRT error circle we find a fading uncatalogued object at coordinates
```
RA(2000.0)=   16:52:52.86
Dec(2000.0)=  +82:03:16.4  (error 0.5")
```
with R=15.2 +- 0.2 mag, calibrated against nearby USNOB-1 stars.
GCN Circular #15283
B. N. Barlow (High Point University), V. D'Elia (ASDC), P. A. Evans (U Leicester), C. Gronwall (PSU), A. Y. Lien (NASA/GSFC/ORAU), D. Malesani (DARK/NBI), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), T. Sakamoto (AGU), M. H. Siegel (PSU) and M. C. Stroh (PSU) report on behalf of the Swift Team: At 06:54:21 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 131002A (trigger=572721). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 253.275, +82.057 which is
```
RA(J2000) = 16h 53m 06s
Dec(J2000) = +82d 03' 26"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed two pulses with total duration of ~50 seconds. The first pulse happened at T0 lasting around 2 seconds, with peak count rate of ~3000 counts/sec (15-350 keV). The second pulse happened at ~T+45 with a duration of around 15 seconds and peak count rate ~2000 counts/sec (15-350 keV). The XRT began observing the field at 06:55:27.9 UT, 66.7 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 253.2159, 82.0536 which is equivalent to:
```
RA(J2000) = 16h 52m 51.83s
Dec(J2000) = +82d 03' 13.0"
```
with an uncertainty of 2.0 arcseconds (radius, 90% containment). This location is 31 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 in excess of the Galactic value (5.56 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.6 (+1.37/-1.25) x 10^21 cm^-2 (90% confidence). The initial flux in the 2.5 s image was 9.38e-10 erg cm^-2 s^-1 (0.2-10 keV). UVOT took a finding chart exposure of 150 seconds with the White filter starting 869 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 0.08. Burst Advocate for this burst is B. N. Barlow (bbarlow AT highpoint.edu). 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 #15287
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 1599 s of XRT Photon Counting mode data and 3 UVOT images for GRB 131002A, 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 = 253.22092, +82.05433 which is equivalent to:
```
RA (J2000): 16h 52m 53.02s
Dec (J2000): +82d 03' 15.6"
```
with an uncertainty of 1.8 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 #15290
L. Elenin (KIAM), A. Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed optical transient(Guidorzi et al., GCN 15282) of the Swift GRB 131002A (Barlow et al., GCN 15283) with 0.4-m SANTEL-400AN telescope of ISON-NM observatory starting on Oct., 2 (UT) 06:55:23 (i.e. 58 s after burst trigger) in robotic mode. Series of 30 s exposures were obtained in clear filter. After PSF subtraction of a nearby bright star we clearly detect the optical transient in each single frames of initial series. Coordinates of the optical transient are (J2000) 16 52 53.29 +82 03 15.6 with uncertainty of 0.25" in both coordinates. Preliminary photometry is based on USNO-B1.0 (R2) stars. The maximum brightness of the OT (15.2 +/- 0.05) was detected in the second frame at 0.00141 days after trigger.
Light curve of the initial stage of the OT can be found at http://grb.rssi.ru/GRB131002A/GRB131002A_ISON-NM_lc.png
GCN Circular #15292
K.L. Page (U. Leicester), C. Pagani (U. Leicester), B. Sbarufatti (INAF-OAB/PSU), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), A.P. Beardmore (U. Leicester) and report on behalf of the Swift-XRT team: report on behalf of the Swift-XRT team:
We have analysed 6.5 ks of XRT data for GRB 131002A, from 56 s to 29.9 ks after the BAT trigger. The data comprise 44 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode.
The late-time light curve (from T0+5.1 ks) can be modelled with a power-law decay with a decay index of alpha=1.05 (+0.26, -0.24).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.03 (+0.19, -0.18). The best-fitting absorption column is 1.0 (+0.5, -0.4) x 10^21 cm^-2, in excess of the Galactic value of 5.6 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.0 (+0.5, -0.4) x 10^21 cm^-2
Galactic foreground: 5.6 x 10^20 cm^-2
Excess significance: 1.9 sigma
Photon index:	     2.03 (+0.19, -0.18)
```
If the light curve continues to decay with a power-law decay index of 1.05, the count rate at T+24 hours will be 7.7 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.8 x 10^-13 (3.6 x 10^-13) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00572721.
This circular is an official product of the Swift-XRT team.
GCN Circular #15294
A. A. Breeveld (UCL-MSSL) and B. N. Barlow (High Point University)=20 report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 131002A 77 s after the BAT trigger (Barlow et al., GCN Circ. 15283). A fading source consistent with the optical position (Guidorzi GCN Circ. 15282) is detected in the initial UVOT exposures.
Preliminary detections and 3-sigma upper limits using the UVOT=20 photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white               77          227          147         17.94 =B1 0.06
white              870         1020          147         19.40 =B1 0.11
v                  620         1071           59         18.89 =B1 0.36
b                  546          739           39         19.41 =B1 0.31
u                  290         7169          736        >21.1
w1                 669         6964          510        >20.7
m2                 645        13293          939        >21.1
w2                 770        11860         1199        >21.5
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) =3D 0.08 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #15300
A. von Kienlin (MPE) and C. Meegan (UAH) report on behalf of the Fermi GBM Team:
"At 06:55:06.99 UT on 2 October 2013, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 131002A (trigger 402389709 / 131002288) which was also detected by the Swift/BAT (Barlow et al. 2008, GCN 15283). GBM triggered ~46 sec later than Swift/BAT on the second pulse of the GRB. The GBM on-ground location is consistent with the Swift position.
The angle from the Fermi LAT boresight is 128.2 degrees.
The GBM light curve shows a single pulse with a duration (T90) of about 12 s (50-300 keV). The time-averaged spectrum from T0-4.096 s to T0+4.096 s is well fit by a simple power law function with index -1.6 +/- 0.1 keV.
The event fluence (10-1000 keV) in this time interval is (1.4 +/- 0.3)E-06 erg/cm^2. The 1.024-sec peak photon flux measured starting from T0 -2.1 s in the 10-1000 keV band is 2.1 +/- 0.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #15302
T. Sakamoto (AGU), B. N. Barlow (High Point University), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), J. Norris (BSU), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 131002A (trigger #572721) (Barlow, et al., GCN Circ. 15283). The BAT ground-calculated position is RA, Dec = 253.103, 82.036 deg which is
```
  RA(J2000)  =  16h 52m 24.8s
  Dec(J2000) = +82d 02' 08.3"
```
with an uncertainty of 3.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 71%.
The mask-weighted light curve shows two peaks separated by ~45 seconds. The first short peak starts at ~T0 and lasts for ~1 sec, the second long peak starts at ~T+40 and ends at ~T+60. T90 (15-350 keV) is 55.59 +- 3.98 sec (estimated error including systematics).
The spectral lag for the first short pulse is 0.114 s +- 0.04 s (for the 50-100 keV and 15-25 keV bands), and the spectrum is slightly softer than the second long pulse. Therefore, the spectral and timing properties match better to those of regular long bursts than those normally seen in short bursts with extended emission.
The time-averaged spectrum from T-0.20 to T+59.67 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.63 +- 0.19. The fluence in the 15-150 keV band is 6.4 +- 0.8 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+43.17 sec in the 15-150 keV band is 1.3 +- 0.1 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/572721/BA/

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Jochen Greiner, last update: 04-Oct-2013 [Disclaimer]