Gamma-ray Burst 120803A

(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 03 Aug 12 07:23:13 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     529582,   Seg_Num: 0
GRB_RA:          269.565d {+17h 58m 16s} (J2000),
                 269.735d {+17h 58m 56s} (current),
                 268.892d {+17h 55m 34s} (1950)
GRB_DEC:          -6.715d {-06d 42' 53"} (J2000),
                  -6.716d {-06d 42' 55"} (current),
                  -6.711d {-06d 42' 40"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       33791 [cnts]    Image_Peak=446 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   477     E_range: 25-100 keV
BKG_INTEN:       247181 [cnts]
BKG_TIME:        26446.50 SOD {07:20:46.50} UT
BKG_DUR:         64 [sec]
GRB_DATE:        16142 TJD;   216 DOY;   12/08/03
GRB_TIME:        26536.10 SOD {07:22:16.10} UT
GRB_PHI:          21.66 [deg]
GRB_THETA:        33.84 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.78 [sigma]
IMAGE_SIGNIF:    7.28 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +2  -3  +0  +1 +71  +0 
SUN_POSTN:       133.82d {+08h 55m 17s}  +17.37d {+17d 22' 09"}
SUN_DIST:        135.70 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.76d {+21h 47m 03s}   -8.07d {-08d 04' 15"}
MOON_DIST:        56.52 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      269.55, 16.72 [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 = 214.02,6.78 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:24:53 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.721d {-06d 43' 13"} (J2000)
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26683.14 SOD {07:24:43.14} UT,   147.0 [sec] since BAT Trigger Time
COUNTS:          1    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        0    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:26:15 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     529582,   Seg_Num: 0
GRB_RA:          269.565d {+17h 58m 16s} (J2000),
                 269.735d {+17h 58m 56s} (current),
                 268.892d {+17h 55m 34s} (1950)
GRB_DEC:          -6.715d {-06d 42' 53"} (J2000),
                  -6.716d {-06d 42' 55"} (current),
                  -6.711d {-06d 42' 40"} (1950)
GRB_DATE:        16142 TJD;   216 DOY;   12/08/03
GRB_TIME:        26536.10 SOD {07:22:16.10} UT
TRIGGER_INDEX:   477
GRB_PHI:          21.66 [deg]
GRB_THETA:        33.84 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     11.78 [sigma]
IMAGE_SIGNIF:    7.28 [sigma]
LC_URL:          sw00529582000msb.lc
SUN_POSTN:       133.82d {+08h 55m 17s}  +17.37d {+17d 22' 07"}
SUN_DIST:        135.70 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.79d {+21h 47m 09s}   -8.06d {-08d 03' 40"}
MOON_DIST:        56.55 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.62 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      269.55, 16.72 [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 = 214.02,6.78 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:27:38 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.720d {-06d 43' 12"} (J2000)
POINT_ROLL:      287.995d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26685.52 SOD {07:24:45.52} UT,   149.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.044
N_STARS:         163
X_OFFSET:        647 [pixels]
Y_OFFSET:        447 [pixels]
X_MAX:           1606 [pixels]
Y_MAX:           1406 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00529582000msufc0149.fits
SUN_POSTN:       133.82d {+08h 55m 18s}  +17.37d {+17d 22' 06"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.80d {+21h 47m 12s}   -8.06d {-08d 03' 24"}
MOON_DIST:        56.54 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:28:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.720d {-06d 43' 12"} (J2000)
POINT_ROLL:      287.995d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26685.52 SOD {07:24:45.52} UT,   149.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.044
N_STARS:         163
X_OFFSET:        647 [pixels]
Y_OFFSET:        447 [pixels]
X_MAX:           1606 [pixels]
Y_MAX:           1406 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00529582000msufc0149.fits
SUN_POSTN:       133.82d {+08h 55m 18s}  +17.37d {+17d 22' 06"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.81d {+21h 47m 13s}   -8.06d {-08d 03' 17"}
MOON_DIST:        56.54 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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 03 Aug 12 07:30:20 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.720d {-06d 43' 12"} (J2000)
ROLL:            287.995d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26685.52 SOD {07:24:45.52} UT,   149.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     365671495
X_OFFSET:        966 [pixels]
Y_OFFSET:        766 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1126
Y_GRB_POS:       926
BINNING_INDEX:   1
IM_URL:          sw00529582000msuni0159.fits
SUN_POSTN:       133.83d {+08h 55m 18s}  +17.37d {+17d 22' 04"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.83d {+21h 47m 18s}   -8.05d {-08d 02' 53"}
MOON_DIST:        56.56 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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:     Fri 03 Aug 12 07:30:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.720d {-06d 43' 12"} (J2000)
ROLL:            287.995d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26685.52 SOD {07:24:45.52} UT,   149.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     365671495
X_OFFSET:        966 [pixels]
Y_OFFSET:        766 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1126
Y_GRB_POS:       926
BINNING_INDEX:   1
IM_URL:          sw00529582000msuni0159.fits
SUN_POSTN:       133.83d {+08h 55m 18s}  +17.37d {+17d 22' 04"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.83d {+21h 47m 19s}   -8.05d {-08d 02' 50"}
MOON_DIST:        56.56 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:32:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
POINT_ROLL:      287.994d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26843.47 SOD {07:27:23.47} UT,   307.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.826
N_STARS:         62
X_OFFSET:        407 [pixels]
Y_OFFSET:        207 [pixels]
X_MAX:           1846 [pixels]
Y_MAX:           1646 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00529582000msufc0307.fits
SUN_POSTN:       133.83d {+08h 55m 18s}  +17.37d {+17d 22' 03"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.84d {+21h 47m 22s}   -8.04d {-08d 02' 29"}
MOON_DIST:        56.58 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:32:43 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
POINT_ROLL:      287.994d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26843.47 SOD {07:27:23.47} UT,   307.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.826
N_STARS:         62
X_OFFSET:        407 [pixels]
Y_OFFSET:        207 [pixels]
X_MAX:           1846 [pixels]
Y_MAX:           1646 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00529582000msufc0307.fits
SUN_POSTN:       133.83d {+08h 55m 18s}  +17.37d {+17d 22' 03"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.85d {+21h 47m 23s}   -8.04d {-08d 02' 25"}
MOON_DIST:        56.58 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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 03 Aug 12 07:33:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
ROLL:            287.994d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26843.47 SOD {07:27:23.47} UT,   307.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     365671652
X_OFFSET:        966 [pixels]
Y_OFFSET:        766 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1126
Y_GRB_POS:       926
BINNING_INDEX:   1
IM_URL:          sw00529582000msuni0317.fits
SUN_POSTN:       133.83d {+08h 55m 19s}  +17.37d {+17d 22' 02"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.86d {+21h 47m 25s}   -8.04d {-08d 02' 13"}
MOON_DIST:        56.59 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:33:34 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
ROLL:            287.994d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  26843.47 SOD {07:27:23.47} UT,   307.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     365671652
X_OFFSET:        966 [pixels]
Y_OFFSET:        766 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1126
Y_GRB_POS:       926
BINNING_INDEX:   1
IM_URL:          sw00529582000msuni0317.fits
SUN_POSTN:       133.83d {+08h 55m 19s}  +17.37d {+17d 22' 02"}
SUN_DIST:        135.73 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      326.85d {+21h 47m 25s}   -8.04d {-08d 02' 15"}
MOON_DIST:        56.59 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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:     Fri 03 Aug 12 07:50:04 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
POINT_ROLL:      287.993d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  27400.13 SOD {07:36:40.13} UT,   864.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.123
N_STARS:         190
X_OFFSET:        407 [pixels]
Y_OFFSET:        207 [pixels]
X_MAX:           1846 [pixels]
Y_MAX:           1646 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00529582000msufc0864.fits
SUN_POSTN:       133.84d {+08h 55m 21s}  +17.36d {+17d 21' 51"}
SUN_DIST:        135.72 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      327.00d {+21h 48m 00s}   -7.98d {-07d 59' 04"}
MOON_DIST:        56.74 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 03 Aug 12 07:50:30 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
POINT_ROLL:      287.993d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  27400.13 SOD {07:36:40.13} UT,   864.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.123
N_STARS:         190
X_OFFSET:        407 [pixels]
Y_OFFSET:        207 [pixels]
X_MAX:           1846 [pixels]
Y_MAX:           1646 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00529582000msufc0864.fits
SUN_POSTN:       133.84d {+08h 55m 21s}  +17.36d {+17d 21' 51"}
SUN_DIST:        135.72 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      327.01d {+21h 48m 01s}   -7.98d {-07d 58' 59"}
MOON_DIST:        56.74 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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 03 Aug 12 07:51:40 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
ROLL:            287.993d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  27400.13 SOD {07:36:40.13} UT,   864.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     365672209
X_OFFSET:        966 [pixels]
Y_OFFSET:        766 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1126
Y_GRB_POS:       926
BINNING_INDEX:   1
IM_URL:          sw00529582000msuni0874.fits
SUN_POSTN:       133.84d {+08h 55m 22s}  +17.36d {+17d 21' 50"}
SUN_DIST:        135.72 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      327.02d {+21h 48m 04s}   -7.98d {-07d 58' 45"}
MOON_DIST:        56.75 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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:     Fri 03 Aug 12 07:52:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     529582,   Seg_Num: 0
POINT_RA:        269.593d {+17h 58m 22s} (J2000)
POINT_DEC:        -6.722d {-06d 43' 18"} (J2000)
ROLL:            287.993d
IMG_START_DATE:  16142 TJD;   216 DOY;   12/08/03
IMG_START_TIME:  27400.13 SOD {07:36:40.13} UT,   864.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     365672209
X_OFFSET:        966 [pixels]
Y_OFFSET:        766 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1126
Y_GRB_POS:       926
BINNING_INDEX:   1
IM_URL:          sw00529582000msuni0874.fits
SUN_POSTN:       133.84d {+08h 55m 22s}  +17.36d {+17d 21' 50"}
SUN_DIST:        135.72 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
MOON_POSTN:      327.02d {+21h 48m 05s}   -7.98d {-07d 58' 40"}
MOON_DIST:        56.76 [deg]
MOON_ILLUM:      98 [%]
GAL_COORDS:       20.78,  8.60 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      269.58, 16.72 [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 #13565
J. L. Racusin (NASA/GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), P. A. Evans (U Leicester), C. Guidorzi (U Ferrara), J. A. Kennea (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL) and T. Sakamoto (NASA/UMBC) report on behalf of the Swift Team:
At 07:22:16 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120803A (trigger=529582). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 269.565, -6.715 which is
```
   RA(J2000) = 17h 58m 16s
   Dec(J2000) = -06d 42' 53"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~3 sec after the trigger.
The XRT began observing the field at 07:24:43.1 UT, 147.0 seconds after the BAT trigger. No source was detected in 1.0 ks of promptly downlinked data, which covered 91% of the BAT error circle. We are waiting for the full dataset to detect and localise the XRT counterpart.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 149 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 25% of the BAT 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 BAT 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 0.94.
This event is of low significance (7.3 sigma) in the BAT trigger image, and no XRT source has been found in the 91% of the BAT error circle covered by the immediately-available data. It is unusual for a real long GRB to lack an XRT counterpart. Therefore, we cannot confirm the reality of this event until we receive the complete downlinked data.
Burst Advocate for this burst is J. L. Racusin (judith.racusin AT nasa.gov). 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 #13568
T. N. Ukwatta (MSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), J. L. Racusin (NASA/GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC) (i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 120803A (trigger #529582) (Racusin, et al., GCN Circ. 13565). The BAT ground-calculated position is RA, Dec = 269.531, -6.733 deg, which is
```
   RA(J2000)  =  17h 58m 07.4s 
   Dec(J2000) = -06d 43' 58.0" 
```
with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 54%.
The mask-weighted light curve shows a single peak starting at ~T+0, peaking ~T+3 sec, and returning to baseline at ~T+20 sec. T90 (15-350 keV) is 10.0 +- 3.6 sec (estimated error including systematics).
The time-averaged spectrum from T+0.40 to T+11.40 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.86 +- 0.35. The fluence in the 15-150 keV band is 3.0 +- 0.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+3.40 sec in the 15-150 keV band is 0.4 +- 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/529582/BA/
We note that in our original circular (13565) that this event was labeled as a "possible" GRB. Given that the BAT detection significance in ground proccessing has risen to 8.0 sigma, that the lightcurve shape is consistant with a GRB, and that it is off the Galactic Plane, we are confident that this trigger is due to a real GRB.
GCN Circular #13569
P.A. Evans, K.L. Page (U. Leicester) and J.L. Racusin (NASA/GSFC) report on behalf of the Swift-XRT team:
We have analysed 2.5 ks of Photon Counting mode XRT data on GRB 120803A from 155 s to 5.8 ks after the BAT trigger (Racusin et al., GCN Circ 13565). We find a single, uncatalogued X-ray source at RA,Dec = 269.5140, -6.7628 which is equivalent to:
```
   RA(J2000)  = 17h  58m 03.36s
   Dec(J2000) = -06d 45' 46.2"
```
with an uncertainty of 4 arc sec (radius, 90% containment). This source is 4.2 arcmin from the original BAT position (GCN Circ 13565) but only 2 arcmin from the refined BAT position (Ukwatta et al., GCN Circ 13568), inside the refined BAT error circle.
The spectrum of this object can be modelled by an absorbed power-law with a photon index of 1.1 (+0.9, -0.5). The absorption is consistent with the Galactic value of 2.3e21 cm^-2 (Kalberla et al. 2005).
The source has a mean count-rate of 0.014 (+/- 0.0029) ct/sec, we cannot tell at this time whether the source is fading. Further observations are planned.
This circular is an official product of the Swift-XRT team.
GCN Circular #13574
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 120803A (Racusin et al., GCNC 13565) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
The observation started on 2012-08-03 14:07:49 UT (~6.8 h after the burst) We did not find any new point source within the XRT circle (Evans et al., GCNC 13569) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.30747    14:45:01    3960.0   >19.7  >19.6  >18.8
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #13615
P.A. Evans (U. Leicester) and J.L. Racusin (NASA/GSFC) report on behalf of the Swift-XRT team:
The Swift-XRT re-observed GRB 120803A on 2012 August 10, for 4.1 ks, starting 5.7 days after the BAT trigger (Racusin et al., GCN Circ. 13565). The X-ray source reported by Evans et al. (GCN Circ. 13569) is no longer detected, to a 3-sigma upper limit of 3.4e-3 ct/sec, significantly below the level it was seen at previously.
We therefore conclude that this source was the afterglow of GRB 120803A.
The results of the automated analysis for this burst are available at http://www.swift.ac.uk/xrt_products/00529582/
This circular is an official product of the Swift-XRT team.
GCN Circular #13617
L. Elenin (KIAM), A. Volnova (SAI MSU), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of possible Swift GRB 120803A (Racusin et al., GCN 13565; Evans et al., GCN 13615) with 0.45-m telescope of ISON-NM observatory starting on Aug. 03 (UT) 07:24:37. We took several unfiltered images of 30 s exposures. Within XRT error circle (Evans et al., GCN 13569) we do not detect any new source. A photometry of co-added frames is based on the USNO-B1.0 (R2) nearby stars is following:
```
T_start,     T0+,           Exposure, UL(3 sigma),
(UT)          mid, d         (s)

07:24:37    0.00258      4x30         17.3
07:24:37    0.01486    45x30         18.0
```

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Jochen Greiner, last update: 10-Aug-2012 [Disclaimer]