Gamma-ray Burst 100702A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:04:00 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     426438,   Seg_Num: 0
GRB_RA:          245.702d {+16h 22m 49s} (J2000),
                 245.918d {+16h 23m 40s} (current),
                 244.680d {+16h 18m 43s} (1950)
GRB_DEC:         -56.538d {-56d 32' 15"} (J2000),
                 -56.562d {-56d 33' 41"} (current),
                 -56.421d {-56d 25' 14"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1200 [cnts]    Image_Peak=189 [image_cnts]
TRIGGER_DUR:     0.128 [sec] 
TRIGGER_INDEX:   122     E_range: 25-100 keV
BKG_INTEN:       26465 [cnts]
BKG_TIME:        3818.05 SOD {01:03:38.05} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15379 TJD;   183 DOY;   10/07/02
GRB_TIME:        3827.20 SOD {01:03:47.20} UT
GRB_PHI:         -154.39 [deg]
GRB_THETA:        37.93 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     37.37 [sigma]
IMAGE_SIGNIF:    14.19 [sigma]
MERIT_PARAMS:     +1  +0  +0  -3  +2  +3  +0  +1 +74  +0 
SUN_POSTN:       100.95d {+06h 43m 49s}  +23.06d {+23d 03' 19"}
SUN_DIST:        137.90 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.38d {+22h 45m 31s}   -2.90d {-02d 53' 43"}
MOON_DIST:        90.59 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.10, -4.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      254.03,-34.44 [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 = 23.70,-10.32 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:05:47 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     426438,   Seg_Num: 0
GRB_RA:          245.6982d {+16h 22m 47.56s} (J2000),
                 245.9134d {+16h 23m 39.21s} (current),
                 244.6763d {+16h 18m 42.31s} (1950)
GRB_DEC:         -56.5295d {-56d 31' 46.1"} (J2000),
                 -56.5535d {-56d 33' 12.4"} (current),
                 -56.4127d {-56d 24' 45.5"} (1950)
GRB_ERROR:       5.7 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       9.31e-10 [erg/cm2/sec]
GRB_SIGNIF:      6.08 [sigma]
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3921.13 SOD {01:05:21.13} UT,   93.9 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.21 261.36 243.77
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       100.96d {+06h 43m 49s}  +23.06d {+23d 03' 19"}
SUN_DIST:        137.90 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.39d {+22h 45m 35s}   -2.89d {-02d 53' 21"}
MOON_DIST:        90.60 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.10, -4.81 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.03,-34.43 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.50 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:05:57 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     426438,   Seg_Num: 0
GRB_RA:          245.6982d {+16h 22m 47.5s} (J2000),
                 245.9134d {+16h 23m 39.2s} (current),
                 244.6763d {+16h 18m 42.3s} (1950)
GRB_DEC:         -56.5295d {-56d 31' 46.1"} (J2000),
                 -56.5535d {-56d 33' 12.4"} (current),
                 -56.4127d {-56d 24' 45.5"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       37 [cnts]
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3921.13 SOD {01:05:21.13} UT,   93.9 [sec] since BAT Trigger Time
CENTROID_X:      338.93,  raw= 339  [pixels]
CENTROID_Y:      280.08,  raw= 280  [pixels]
ROLL:            232.29 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -42.22
GRB_POS_XRT_Z:   86.36
IMAGE_URL:       sw00426438000msxps_rw.img
SUN_POSTN:       100.96d {+06h 43m 49s}  +23.06d {+23d 03' 19"}
SUN_DIST:        137.90 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.40d {+22h 45m 35s}   -2.89d {-02d 53' 19"}
MOON_DIST:        90.60 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.10, -4.81 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.03,-34.43 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:06:01 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     426438,   Seg_Num: 0
GRB_RA:          245.6982d {+16h 22m 47.5s} (J2000),
                 245.9134d {+16h 23m 39.2s} (current),
                 244.6763d {+16h 18m 42.3s} (1950)
GRB_DEC:         -56.5295d {-56d 31' 46.1"} (J2000),
                 -56.5535d {-56d 33' 12.4"} (current),
                 -56.4127d {-56d 24' 45.5"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       37 [cnts]
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3921.13 SOD {01:05:21.13} UT,   93.9 [sec] since BAT Trigger Time
CENTROID_X:      338.93,  raw= 339  [pixels]
CENTROID_Y:      280.08,  raw= 280  [pixels]
ROLL:            232.29 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -42.22
GRB_POS_XRT_Z:   86.36
IMAGE_URL:       sw00426438000msxps_rw.img
SUN_POSTN:       100.96d {+06h 43m 49s}  +23.06d {+23d 03' 19"}
SUN_DIST:        137.90 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.40d {+22h 45m 35s}   -2.89d {-02d 53' 18"}
MOON_DIST:        90.60 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.10, -4.81 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.03,-34.43 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:07:36 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     426438,   Seg_Num: 0
GRB_RA:          245.702d {+16h 22m 49s} (J2000),
                 245.918d {+16h 23m 40s} (current),
                 244.680d {+16h 18m 43s} (1950)
GRB_DEC:         -56.538d {-56d 32' 15"} (J2000),
                 -56.562d {-56d 33' 41"} (current),
                 -56.421d {-56d 25' 14"} (1950)
GRB_DATE:        15379 TJD;   183 DOY;   10/07/02
GRB_TIME:        3827.20 SOD {01:03:47.20} UT
TRIGGER_INDEX:   122
GRB_PHI:         -154.39 [deg]
GRB_THETA:        37.93 [deg]
DELTA_TIME:      44.00 [sec]
TRIGGER_DUR:     0.128 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     37.37 [sigma]
IMAGE_SIGNIF:    14.19 [sigma]
LC_URL:          sw00426438000msb.lc
SUN_POSTN:       100.96d {+06h 43m 50s}  +23.06d {+23d 03' 18"}
SUN_DIST:        137.90 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.41d {+22h 45m 38s}   -2.88d {-02d 52' 58"}
MOON_DIST:        90.61 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.10, -4.82 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      254.03,-34.44 [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 = 23.70,-10.32 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:09:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.676d {+16h 22m 42s} (J2000)
POINT_DEC:       -56.554d {-56d 33' 15"} (J2000)
POINT_ROLL:      232.293d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3928.89 SOD {01:05:28.89} UT,   101.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.293
N_STARS:         190
X_OFFSET:        368 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1327 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00426438000msufc0101.fits
SUN_POSTN:       100.96d {+06h 43m 50s}  +23.05d {+23d 03' 18"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.42d {+22h 45m 41s}   -2.88d {-02d 52' 34"}
MOON_DIST:        90.64 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:09:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.676d {+16h 22m 42s} (J2000)
POINT_DEC:       -56.554d {-56d 33' 15"} (J2000)
POINT_ROLL:      232.293d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3928.89 SOD {01:05:28.89} UT,   101.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.293
N_STARS:         190
X_OFFSET:        368 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1327 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00426438000msufc0101.fits
SUN_POSTN:       100.96d {+06h 43m 50s}  +23.05d {+23d 03' 18"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.42d {+22h 45m 41s}   -2.88d {-02d 52' 34"}
MOON_DIST:        90.64 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.46 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:09:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.676d {+16h 22m 42s} (J2000)
POINT_DEC:       -56.554d {-56d 33' 15"} (J2000)
POINT_ROLL:      232.293d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3928.89 SOD {01:05:28.89} UT,   101.7 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.293
N_STARS:         190
X_OFFSET:        368 [pixels]
Y_OFFSET:        648 [pixels]
X_MAX:           1327 [pixels]
Y_MAX:           1607 [pixels]
DET_THRESH:      17
PHOTO_THRESH:    10
SL_URL:          sw00426438000msufc0101.fits
SUN_POSTN:       100.96d {+06h 43m 50s}  +23.05d {+23d 03' 18"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.43d {+22h 45m 42s}   -2.88d {-02d 52' 29"}
MOON_DIST:        90.64 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.46 [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:     Fri 02 Jul 10 01:11:49 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.676d {+16h 22m 42s} (J2000)
POINT_DEC:       -56.554d {-56d 33' 15"} (J2000)
ROLL:            232.293d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3928.89 SOD {01:05:28.89} UT,   101.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     299725534
X_OFFSET:        692 [pixels]
Y_OFFSET:        1024 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       852
Y_GRB_POS:       1184
BINNING_INDEX:   1
IM_URL:          sw00426438000msuni0107.fits
SUN_POSTN:       100.96d {+06h 43m 50s}  +23.05d {+23d 03' 18"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.44d {+22h 45m 45s}   -2.87d {-02d 52' 06"}
MOON_DIST:        90.65 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.46 [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:     Fri 02 Jul 10 01:12:07 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.676d {+16h 22m 42s} (J2000)
POINT_DEC:       -56.554d {-56d 33' 15"} (J2000)
ROLL:            232.293d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  3928.89 SOD {01:05:28.89} UT,   101.7 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     299725534
X_OFFSET:        692 [pixels]
Y_OFFSET:        1024 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       852
Y_GRB_POS:       1184
BINNING_INDEX:   1
IM_URL:          sw00426438000msuni0107.fits
SUN_POSTN:       100.96d {+06h 43m 50s}  +23.05d {+23d 03' 18"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.44d {+22h 45m 46s}   -2.87d {-02d 52' 02"}
MOON_DIST:        90.66 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.46 [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:     Fri 02 Jul 10 01:18:14 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.678d {+16h 22m 43s} (J2000)
POINT_DEC:       -56.552d {-56d 33' 07"} (J2000)
POINT_ROLL:      232.295d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  4141.05 SOD {01:09:01.05} UT,   313.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.229
N_STARS:         190
X_OFFSET:        372 [pixels]
Y_OFFSET:        704 [pixels]
X_MAX:           1331 [pixels]
Y_MAX:           1663 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00426438000msufc0313.fits
SUN_POSTN:       100.96d {+06h 43m 52s}  +23.05d {+23d 03' 16"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.49d {+22h 45m 57s}   -2.85d {-02d 50' 46"}
MOON_DIST:        90.70 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.45 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:18:14 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.678d {+16h 22m 43s} (J2000)
POINT_DEC:       -56.552d {-56d 33' 07"} (J2000)
POINT_ROLL:      232.295d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  4141.05 SOD {01:09:01.05} UT,   313.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.229
N_STARS:         190
X_OFFSET:        372 [pixels]
Y_OFFSET:        704 [pixels]
X_MAX:           1331 [pixels]
Y_MAX:           1663 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00426438000msufc0313.fits
SUN_POSTN:       100.96d {+06h 43m 52s}  +23.05d {+23d 03' 16"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.49d {+22h 45m 57s}   -2.85d {-02d 50' 46"}
MOON_DIST:        90.70 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.45 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:18:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.678d {+16h 22m 43s} (J2000)
POINT_DEC:       -56.552d {-56d 33' 07"} (J2000)
POINT_ROLL:      232.295d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  4141.05 SOD {01:09:01.05} UT,   313.9 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.229
N_STARS:         190
X_OFFSET:        372 [pixels]
Y_OFFSET:        704 [pixels]
X_MAX:           1331 [pixels]
Y_MAX:           1663 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00426438000msufc0313.fits
SUN_POSTN:       100.96d {+06h 43m 52s}  +23.05d {+23d 03' 16"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.49d {+22h 45m 58s}   -2.85d {-02d 50' 42"}
MOON_DIST:        90.70 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.45 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 02 Jul 10 01:19:33 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     426438,   Seg_Num: 0
GRB_RA:          245.6968d {+16h 22m 47.23s} (J2000),
                 245.9120d {+16h 23m 38.87s} (current),
                 244.6749d {+16h 18m 41.97s} (1950)
GRB_DEC:         -56.5315d {-56d 31' 53.4"} (J2000),
                 -56.5555d {-56d 33' 19.6"} (current),
                 -56.4147d {-56d 24' 52.7"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  4098.00 SOD {01:08:18.00} UT,   270.8 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       100.97d {+06h 43m 52s}  +23.05d {+23d 03' 16"}
SUN_DIST:        137.89 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.50d {+22h 45m 59s}   -2.84d {-02d 50' 30"}
MOON_DIST:        90.70 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.10, -4.81 [deg] galactic lon,lat of the burst
ECL_COORDS:      254.03,-34.43 [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:     Fri 02 Jul 10 01:19:42 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.678d {+16h 22m 43s} (J2000)
POINT_DEC:       -56.552d {-56d 33' 07"} (J2000)
ROLL:            232.295d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  4141.05 SOD {01:09:01.05} UT,   313.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     299725747
X_OFFSET:        692 [pixels]
Y_OFFSET:        1024 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       852
Y_GRB_POS:       1184
BINNING_INDEX:   1
IM_URL:          sw00426438000msuni0319.fits
SUN_POSTN:       100.97d {+06h 43m 52s}  +23.05d {+23d 03' 16"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.50d {+22h 46m 00s}   -2.84d {-02d 50' 28"}
MOON_DIST:        90.71 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.45 [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:     Fri 02 Jul 10 01:19:58 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     426438,   Seg_Num: 0
POINT_RA:        245.678d {+16h 22m 43s} (J2000)
POINT_DEC:       -56.552d {-56d 33' 07"} (J2000)
ROLL:            232.295d
IMG_START_DATE:  15379 TJD;   183 DOY;   10/07/02
IMG_START_TIME:  4141.05 SOD {01:09:01.05} UT,   313.9 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     299725747
X_OFFSET:        692 [pixels]
Y_OFFSET:        1024 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       852
Y_GRB_POS:       1184
BINNING_INDEX:   1
IM_URL:          sw00426438000msuni0319.fits
SUN_POSTN:       100.97d {+06h 43m 52s}  +23.05d {+23d 03' 16"}
SUN_DIST:        137.87 [deg]   Sun_angle= -9.7 [hr] (East of Sun)
MOON_POSTN:      341.50d {+22h 46m 00s}   -2.84d {-02d 50' 25"}
MOON_DIST:        90.71 [deg]
MOON_ILLUM:      74 [%]
GAL_COORDS:      329.08, -4.82 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      254.02,-34.45 [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 Circular #10916
M. H. Siegel (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), J. M. Gelbord (PSU), D. Grupe (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), D. M. Palmer (LANL) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
At 01:03:47 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100702A (trigger=426438). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 245.702, -56.538 which is
```
   RA(J2000) = 16h 22m 49s
   Dec(J2000) = -56d 32' 15"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak with a duration of about 0.3 sec. The peak count rate was ~11000 counts/sec (15-350 keV), at ~0.2 sec after the trigger.
The XRT began observing the field at 01:05:21.1 UT, 93.9 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 245.6969, -56.5316 which is equivalent to:
```
   RA(J2000)  = 16h 22m 47.26s
   Dec(J2000) = -56d 31' 53.8"
```
with an uncertainty of 2.4 arcseconds (radius, 90% containment). This location is 24 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 2.84e+21 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 9.31e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 101 seconds after the BAT trigger. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. A known source from the DSS is within the XRT error circle. However, because of the density of catalogued stars, further analysis is required to determine if this is the GRB host, afterglow or an unrelated background source. The coverage of the XRT error circle by the 8'x8' region for the list of sources generated on-board is uncertain because the large number of sources filled the available telemetry. Because of the density of catalogued stars, further analysis is required to report an upper limit for any afterglow in the region. No correction has been made for the large, but uncertain extinction expected.
Burst Advocate for this burst is M. H. Siegel (siegel AT astro.psu.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 #10917
H. Flewelling (IfA/Hawaii), W. Zheng (U Mich), S. B. Pandey (U Mich), W. Rujopakarn (Steward), report on behalf of the ROTSE collaboration: ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, responded to GRB 100702 (Swift trigger 426438; M. H. Siegel, GCN 10916), producing images beginning 7.7 s after the GCN notice time. An automated response took the first image at 01:04:06.7 UT, 19.5 s after the burst, under fair conditions. We took 10 5-sec, 10 20-sec and 40 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on going.
Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle or the XRT error circle, for both single images and coadding into sets of 10; however, we are limited as the field is severely crowded. Individual images have limiting magnitudes ranging from 15.6-15.9; we set the following specific limits.
```
  
start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
--------------------------------------------------------------------
01:04:06.7   01:05:22.8        76     16.1           19.5       Y
01:20:08.4   01:24:48.5       280     16.2          981.2       Y
```
GCN Circular #10918
Daniele Malesani (DARK/NBI), Andrew J. Levan (Univ. Warwick), Johan P. U. Fynbo (DARK/NBI), report on behalf of the X-shooter GRB collaboration:
We observed the field of the short GRB 100702A (Siegel et al., GCN 10916) with the ESO VLT equipped with X-shooter.
In the R-band acquisition image, taken starting on 2010 July 2 at 2:05 UT (1 hr after the GRB), we detect two pointlike sources within the XRT error circle (Siegel et al., GCN 10916):
```
A: RA = 16:22:47.05, Dec = -56:31:53.3, R = 15.49
B: RA = 16:22:47.27, Dec = -56:31:55.4, R = 17.20
```
A third object is located just above the XRT circle:
C: RA = 16:22:47.30, Dec = -56:31:50.6, R = 17.25
Photometry was computed against USNO-B1. Sources A and C are clearly visible in the DSS, while source B can be barely spotted, blended with source A. A finding chart is visible at the following URL:
http://www.astro.ku.dk/~malesani/GRB/100702A/GRB100702A_finder.jpg
A second R-band image was taken 48 minutes after, and none of the above mentioned sources vary by more than 0.05 mag during this time span. For an afterglow decay proportional to t^-1, a variation of ~0.6 mag would be expected.
It is thus likely that none of the above sources is related to the GRB. This is not surprising given the moderately crowded field (at Galactic latitude b = -5 deg). We note that the glare from the above mentioned bright objects makes it difficult to identify faint sources within the XRT error circle.
We acknowledge excellent and prompt support from the observing staff at Paranal, in particular Christophe Martayan, Andrew Fox, Vincenzo Mainieri, Manuel Olivares, Thomas Szeifert, and the visitor observer, Nick Cox.
GCN Circular #10919
W. Fong, E. Berger, and M. Servillat (Harvard) report:
"We observed the location of the short GRB 100702A (GCN 10916) with the PANIC infrared imager on the Magellan/Baade 6.5-m telescope starting on 2010 July 2.089 UT (65 min after the burst). A total of 27 min were obtained in the J-band with seeing of about 0.55 arcsec. Within the 2.4-arcsec radius XRT error circle we detect one bright point source and two fainter sources at the following coordinates (J2000; astrometry relative to the 2MASS catalog):
```
S1: RA = 16:22:47.23, DEC = -56:31:55.6
S2: RA = 16:22:47.53, DEC = -56:31:54.6
S3: RA = 16:22:47.24, DEC = -56:31:52.2
```
Source S1 is the same as source "B" in GCN 10918 (Malesani et al.), while sources S2 and S3 are not detected in their finder.
We note that in 2MASS images of the field source S1 is possibly blended with the bright star at RA = 16:22:47.01, DEC = -56:31:53.5 (designated source "A" in GCN 10918), while sources S2 and S3 are below the 2MASS sensitivity threshold.
Additional observations are planned to check for variability of sources S2 and S3."
GCN Circular #10921
E. Berger, W. Fong, and M. Servillat (Harvard) report:
"We re-observed the location of the short GRB 100702A (GCN 10916) with the PANIC infrared imager on the Magellan/Baade 6.5-m telescope starting on 2010 July 2.290 UT (4.8 hours after our first observation, which started 65 min after the burst; GCN 10919). A total of 27 min were obtained in the J-band with slightly worse seeing than in our first epoch, 0.75 arcsec. Digital image subtraction of the two epochs using the ISIS package reveals no change in the flux of our previously-identified sources S1 (source "B" of Malesani et al. GCN 100918), S2, or S3. No other variable sources are detected within a 45x45 arcsec region centered on the XRT position to a 5-sigma limit of J>22.1 mag (Vega).
We note, however, that the bright star at RA = 16:22:47.01, DEC = -56:31:53.5 (designated source "A" in GCN 10918) strongly contaminates the subtracted image over about 1/4 of the XRT error circle."
GCN Circular #10922
M. De Pasquale (MSSL-UCL) and M. H. Siegel (PSU) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 100621A 101s after the BAT trigger (Siegel et al, GCN 10916). The enhanced XRT error circle appears crowded with sources (Malesani et al., GCN 10918, Fong et al, GCN 10919) which blend together. There is no clear indication of change of optical flux between the first exposures and later ones. The preliminary magnitudes and 3-sigma upper limits for the finding chart exposures (FC) and summed images for the emission in the XRT enhanced error circle are:
```
Filter         T_start    T_stop     Exp(s)   Magnitude/3-sigma upper 
limit
-------------------------------------------------------------
white (FC)     101        251       147       17.99 +/- 0.07
white          594      10684      1295       17.84 +/- 0.05
  u     (FC)    314        564       246       18.85 +/- 0.17
  u            5020       5151       131       18.96 +/- 0.26
  v            4405      17014       735       16.72 +/- 0.04
  b             570       6306       216       17.79 +/- 0.08
uvw1          4815       5015       196         > 19.60
uvm2          4610       4810       197         > 19.40
uvw2          4200      16457      1432         > 20.85
-------------------------------------------------------------
```
The quoted upper limits have not been corrected for the expected Galactic extinction along the line of sight corresponding to E_(B-V) = 0.41 mag. All photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #10923
M. De Pasquale (MSSL) reports:
"In the text of the GCN circular 10922, Swift/UVOT observations of GRB100702A', GRB100621A is erroneously mentioned. All the data quoted in that circular refer to GRB100702A. We apologize for the mistake".
GCN Circular #10924
D. Grupe and M. Siegel (PSU) report on behalf of the Swift-XRT team:
We have analyzed 3770 s of XRT data for GRB 100702A (Siegel et al. GCN Circ. 10916), from 100 s to 9676 s after the BAT trigger. The data comprise 190 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The light curve can be modeled with an initial power-law decay with an index of alpha=0.65 (+0.37, -0.25), followed by a break at T+185 s to an alpha of 4.33 (+0.53, -0.24). The afterglow is not detected after the first orbit.
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.92 (+0.11, -0.10). The best-fitting absorption column is 3.6 (+/-0.4) x 10^21 cm^-2, in excess of the Galactic value of 2.8 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.45 x 10^-11 (6.94 x 10^-11) erg cm^-2 count^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00426438.
This circular is an official product of the Swift-XRT team.
GCN Circular #10926
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), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. H. Siegel (PSU), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (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 100702A (trigger #426438) (Siegel, et al., GCN Circ. 10916). The BAT ground-calculated position is RA, Dec = 245.693, -56.549 deg which is
```
   RA(J2000)  =  16h 22m 46.4s 
   Dec(J2000) = -56d 32' 57.4" 
```
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 61%.
The mask-weighted light curve shows a FRED-like pulse starting at T_zero to ~T+0.25 sec. There is a possible weak pulse emission at T-0.25 sec. T90 (15-350 keV) is 0.16 +- 0.03 sec (estimated error including systematics).
The time-averaged spectrum from T+0.036 to T+0.236 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.54 +- 0.15. The fluence in the 15-150 keV band is 1.2 +- 0.1 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T-0.36 sec in the 15-150 keV band is 2.0 +- 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/426438/BA/
GCN Report 292.1
GCN_Report 292.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_292_1.pdf by M.H. Siegel at PSU titled: "Final report on Swift Observations of GRB 100702A"

Back to JG's homepage

Jochen Greiner, last update: 02-Jul-2010 [Disclaimer]