Gamma-ray Burst 110102A

(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:     Sun 02 Jan 11 18:53:44 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.879d {+16h 23m 31s} (J2000),
                 246.013d {+16h 24m 03s} (current),
                 245.273d {+16h 21m 05s} (1950)
GRB_DEC:          +7.619d {+07d 37' 09"} (J2000),
                  +7.594d {+07d 35' 39"} (current),
                  +7.734d {+07d 44' 04"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1980 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        15563 TJD;     2 DOY;   11/01/02
GRB_TIME:        67945.47 SOD {18:52:25.47} UT
GRB_PHI:         -14.93 [deg]
GRB_THETA:        36.90 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    11.29 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  +1  +0  +0 -67  +0 
SUN_POSTN:       283.07d {+18h 52m 16s}  -22.89d {-22d 53' 36"}
SUN_DIST:         47.36 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.34d {+17h 29m 23s}  -24.06d {-24d 03' 39"}
MOON_DIST:        35.44 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      242.47, 28.78 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 225.27,-10.65 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:55:01 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      58
TRIGGER_NUM:     315687278
GRB_RA:          249.233d {+16h 36m 56s} (J2000),
                 249.378d {+16h 37m 31s} (current),
                 248.576d {+16h 34m 18s} (1950)
GRB_DEC:          -3.717d {-03d 42' 59"} (J2000),
                  -3.738d {-03d 44' 17"} (current),
                  -3.616d {-03d 36' 58"} (1950)
GRB_ERROR:       5.57 [deg radius, statistical plus systematic]
GRB_INTEN:       386 [cnts/sec]
DATA_SIGNIF:     33.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        15563 TJD;     2 DOY;   11/01/02
GRB_TIME:        68076.00 SOD {18:54:36.00} UT
GRB_PHI:         100.00 [deg]
GRB_THETA:        30.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.73
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       1,1,0, 0,0,0, 0,0,0, 1,0,0, 0,0,
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         37.79 [deg]   Sun_angle= 2.2 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 26s}  -24.06d {-24d 03' 37"}
MOON_DIST:        23.87 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       12.49, 27.53 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      248.14, 18.16 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 254.52,16.70 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:54:51 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     315687278
GRB_RA:          249.300d {+16h 37m 12s} (J2000),
                 249.444d {+16h 37m 47s} (current),
                 248.644d {+16h 34m 35s} (1950)
GRB_DEC:          -3.467d {-03d 27' 59"} (J2000),
                  -3.488d {-03d 29' 16"} (current),
                  -3.367d {-03d 22' 00"} (1950)
GRB_ERROR:       10.12 [deg radius, statistical plus systematic]
GRB_INTEN:       166 [cnts/sec]
DATA_SIGNIF:     10.60 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        15563 TJD;     2 DOY;   11/01/02
GRB_TIME:        68076.00 SOD {18:54:36.00} UT
GRB_PHI:         100.00 [deg]
GRB_THETA:        30.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      1.48
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      88%  GRB
2nd_MOST_LIKELY:   7%  Solar Flare
DETECTORS:       1,1,0, 0,0,0, 0,0,0, 1,0,0, 0,0,
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         37.88 [deg]   Sun_angle= 2.2 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 25s}  -24.06d {-24d 03' 37"}
MOON_DIST:        24.05 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       12.77, 27.61 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      248.17, 18.42 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 254.52,16.70 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:55:17 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     315687278
GRB_RA:          245.330d {+16h 21m 19s} (J2000),
                 245.464d {+16h 21m 51s} (current),
                 244.719d {+16h 18m 53s} (1950)
GRB_DEC:          +6.710d {+06d 42' 36"} (J2000),
                  +6.684d {+06d 41' 04"} (current),
                  +6.828d {+06d 49' 39"} (1950)
GRB_ERROR:       2.85 [deg radius, statistical only]
DATA_SIGNIF:     22.00 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        15563 TJD;     2 DOY;   11/01/02
GRB_TIME:        68076.00 SOD {18:54:36.00} UT
GRB_PHI:          99.00 [deg]
GRB_THETA:        41.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.19 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 26s}  -24.06d {-24d 03' 37"}
MOON_DIST:        34.88 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       20.62, 36.28 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      242.06, 27.79 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:55:20 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      68
TRIGGER_NUM:     315687278
GRB_RA:          245.220d {+16h 20m 53s} (J2000),
                 245.355d {+16h 21m 25s} (current),
                 244.609d {+16h 18m 26s} (1950)
GRB_DEC:          +6.530d {+06d 31' 48"} (J2000),
                  +6.504d {+06d 30' 16"} (current),
                  +6.648d {+06d 38' 53"} (1950)
GRB_ERROR:       1.20 [deg radius, statistical only]
DATA_SIGNIF:     40.60 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        15563 TJD;     2 DOY;   11/01/02
GRB_TIME:        68076.00 SOD {18:54:36.00} UT
GRB_PHI:          99.00 [deg]
GRB_THETA:        41.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.16 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 26s}  -24.06d {-24d 03' 37"}
MOON_DIST:        34.78 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       20.36, 36.29 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      241.98, 27.59 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:55:26 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.8821d {+16h 23m 31.70s} (J2000),
                 246.0156d {+16h 24m 03.75s} (current),
                 245.2757d {+16h 21m 06.17s} (1950)
GRB_DEC:          +7.6160d {+07d 36' 57.5"} (J2000),
                  +7.5910d {+07d 35' 27.7"} (current),
                  +7.7311d {+07d 43' 51.9"} (1950)
GRB_ERROR:       6.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.29e-08 [erg/cm2/sec]
GRB_SIGNIF:      4.79 [sigma]
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68094.05 SOD {18:54:54.05} UT,   148.6 [sec] since BAT Trigger Time
TAM[0-3]:        327.64 237.21 261.58 243.53
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.36 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 27s}  -24.06d {-24d 03' 37"}
MOON_DIST:        35.45 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst
ECL_COORDS:      242.48, 28.78 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.26 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:55:40 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.8821d {+16h 23m 31.7s} (J2000),
                 246.0156d {+16h 24m 03.7s} (current),
                 245.2757d {+16h 21m 06.1s} (1950)
GRB_DEC:          +7.6160d {+07d 36' 57.5"} (J2000),
                  +7.5910d {+07d 35' 27.7"} (current),
                  +7.7311d {+07d 43' 51.9"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       23 [cnts]
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68094.05 SOD {18:54:54.05} UT,   148.6 [sec] since BAT Trigger Time
CENTROID_X:      342.33,  raw= 342  [pixels]
CENTROID_Y:      313.00,  raw= 313  [pixels]
ROLL:            130.94 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   35.36
GRB_POS_XRT_Z:   94.37
IMAGE_URL:       sw00441454000msxps_rw.img
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.36 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 27s}  -24.06d {-24d 03' 36"}
MOON_DIST:        35.45 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst
ECL_COORDS:      242.48, 28.78 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:55:34 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.8821d {+16h 23m 31.7s} (J2000),
                 246.0156d {+16h 24m 03.7s} (current),
                 245.2757d {+16h 21m 06.1s} (1950)
GRB_DEC:          +7.6160d {+07d 36' 57.5"} (J2000),
                  +7.5910d {+07d 35' 27.7"} (current),
                  +7.7311d {+07d 43' 51.9"} (1950)
GRB_ERROR:       6.1 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       23 [cnts]
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68094.05 SOD {18:54:54.05} UT,   148.6 [sec] since BAT Trigger Time
CENTROID_X:      342.33,  raw= 342  [pixels]
CENTROID_Y:      313.00,  raw= 313  [pixels]
ROLL:            130.94 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   35.36
GRB_POS_XRT_Z:   94.37
IMAGE_URL:       sw00441454000msxps_rw.img
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.36 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.36d {+17h 29m 27s}  -24.06d {-24d 03' 36"}
MOON_DIST:        35.45 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst
ECL_COORDS:      242.48, 28.78 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:56:27 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.879d {+16h 23m 31s} (J2000),
                 246.013d {+16h 24m 03s} (current),
                 245.273d {+16h 21m 05s} (1950)
GRB_DEC:          +7.619d {+07d 37' 09"} (J2000),
                  +7.594d {+07d 35' 39"} (current),
                  +7.734d {+07d 44' 04"} (1950)
GRB_DATE:        15563 TJD;     2 DOY;   11/01/02
GRB_TIME:        67945.47 SOD {18:52:25.47} UT
TRIGGER_INDEX:   20000
GRB_PHI:         -14.93 [deg]
GRB_THETA:        36.90 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    11.29 [sigma]
LC_URL:          sw00441454000msb.lc
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.37 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.37d {+17h 29m 29s}  -24.06d {-24d 03' 35"}
MOON_DIST:        35.45 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      242.47, 28.78 [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 an image 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 = 225.27,-10.65 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:58:53 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.894d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.590d {+07d 35' 23"} (J2000)
POINT_ROLL:      130.934d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68101.44 SOD {18:55:01.44} UT,   156.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.085
N_STARS:         82
X_OFFSET:        248 [pixels]
Y_OFFSET:        592 [pixels]
X_MAX:           1207 [pixels]
Y_MAX:           1551 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00441454000msufc0155.fits
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 35"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.40d {+17h 29m 35s}  -24.06d {-24d 03' 32"}
MOON_DIST:        35.43 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 18:59:14 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.894d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.590d {+07d 35' 23"} (J2000)
POINT_ROLL:      130.934d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68101.44 SOD {18:55:01.44} UT,   156.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        5.085
N_STARS:         82
X_OFFSET:        248 [pixels]
Y_OFFSET:        592 [pixels]
X_MAX:           1207 [pixels]
Y_MAX:           1551 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00441454000msufc0155.fits
SUN_POSTN:       283.07d {+18h 52m 17s}  -22.89d {-22d 53' 34"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.40d {+17h 29m 36s}  -24.06d {-24d 03' 32"}
MOON_DIST:        35.43 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:01:00 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.894d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.590d {+07d 35' 23"} (J2000)
ROLL:            130.934d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68101.44 SOD {18:55:01.44} UT,   156.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     315687307
X_OFFSET:        596 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       756
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00441454000msuni0162.fits
SUN_POSTN:       283.07d {+18h 52m 18s}  -22.89d {-22d 53' 34"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.42d {+17h 29m 40s}  -24.06d {-24d 03' 29"}
MOON_DIST:        35.44 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:01:16 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.894d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.590d {+07d 35' 23"} (J2000)
ROLL:            130.934d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68101.44 SOD {18:55:01.44} UT,   156.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     315687307
X_OFFSET:        596 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       756
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00441454000msuni0162.fits
SUN_POSTN:       283.07d {+18h 52m 18s}  -22.89d {-22d 53' 34"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.42d {+17h 29m 41s}  -24.06d {-24d 03' 29"}
MOON_DIST:        35.44 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:05:50 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.896d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.591d {+07d 35' 29"} (J2000)
POINT_ROLL:      130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68259.49 SOD {18:57:39.49} UT,   314.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.459
N_STARS:         92
X_OFFSET:        276 [pixels]
Y_OFFSET:        583 [pixels]
X_MAX:           1235 [pixels]
Y_MAX:           1542 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00441454000msufc0314.fits
SUN_POSTN:       283.08d {+18h 52m 19s}  -22.89d {-22d 53' 33"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.47d {+17h 29m 52s}  -24.06d {-24d 03' 23"}
MOON_DIST:        35.46 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN Circular #11509
S. R. Oates (UCL-MSSL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), J. M. Gelbord (PSU), C. Gronwall (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), V. Mangano (INAF-IASFPA), C. B. Markwardt (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL), C. J. Saxton (UCL-MSSL), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU) and G. Stratta (ASDC) report on behalf of the Swift Team:
At 18:52:25 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 110102A (trigger=441454). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 245.879, +7.619 which is
```
   RA(J2000)  =  16h 23m 31s
   Dec(J2000) = +07d 37' 09"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a weak precursor at T_zero and then a bright FRED-like pulse at T+130 sec with a total duration of about 170 sec. The peak count rate was ~6000 counts/sec (15-350 keV), at ~130 sec after the trigger.
The XRT began observing the field at 18:54:54.0 UT, 148.6 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 245.8821, +7.6160 which is equivalent to:
```
   RA(J2000)  = 16h 23m 31.70s
   Dec(J2000) = +07d 36' 57.5"
```
with an uncertainty of 6.3 arcseconds (radius, 90% containment). This location is 15 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 149 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	16:23:31.43 = 245.88096
  DEC(J2000) = +07:36:50.0  =	7.61390
```
with a 90%-confidence error radius of about 0.62 arc sec. This position is 8.6 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.93 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.08.
Burst Advocate for this burst is S. R. Oates (sro AT mssl.ucl.ac.uk). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 19:06:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.896d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.591d {+07d 35' 29"} (J2000)
POINT_ROLL:      130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68259.49 SOD {18:57:39.49} UT,   314.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.459
N_STARS:         92
X_OFFSET:        276 [pixels]
Y_OFFSET:        583 [pixels]
X_MAX:           1235 [pixels]
Y_MAX:           1542 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00441454000msufc0314.fits
SUN_POSTN:       283.08d {+18h 52m 19s}  -22.89d {-22d 53' 33"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.47d {+17h 29m 53s}  -24.06d {-24d 03' 23"}
MOON_DIST:        35.46 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:07:18 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.896d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.591d {+07d 35' 29"} (J2000)
ROLL:            130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68259.49 SOD {18:57:39.49} UT,   314.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     315687466
X_OFFSET:        596 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       756
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00441454000msuni0321.fits
SUN_POSTN:       283.08d {+18h 52m 19s}  -22.89d {-22d 53' 33"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.48d {+17h 29m 55s}  -24.06d {-24d 03' 21"}
MOON_DIST:        35.47 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:07:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.896d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.591d {+07d 35' 29"} (J2000)
ROLL:            130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68259.49 SOD {18:57:39.49} UT,   314.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     315687466
X_OFFSET:        596 [pixels]
Y_OFFSET:        903 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       756
Y_GRB_POS:       1063
BINNING_INDEX:   1
IM_URL:          sw00441454000msuni0321.fits
SUN_POSTN:       283.08d {+18h 52m 19s}  -22.89d {-22d 53' 33"}
SUN_DIST:         47.34 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.48d {+17h 29m 56s}  -24.06d {-24d 03' 21"}
MOON_DIST:        35.47 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:10:43 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.8810d {+16h 23m 31.44s} (J2000),
                 246.0145d {+16h 24m 03.48s} (current),
                 245.2746d {+16h 21m 05.90s} (1950)
GRB_DEC:          +7.6139d {+07d 36' 50.0"} (J2000),
                  +7.5889d {+07d 35' 20.1"} (current),
                  +7.7290d {+07d 43' 44.4"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         17.93 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68105.00 SOD {18:55:05.00} UT,   159.5 [sec] since BAT Trigger Time
SUN_POSTN:       283.08d {+18h 52m 20s}  -22.89d {-22d 53' 32"}
SUN_DIST:         47.37 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.51d {+17h 30m 03s}  -24.05d {-24d 03' 17"}
MOON_DIST:        35.51 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      242.48, 28.78 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 8.6 arcsec from the XRT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 19:14:18 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.895d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.592d {+07d 35' 30"} (J2000)
POINT_ROLL:      130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68813.70 SOD {19:06:53.70} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.872
N_STARS:         138
X_OFFSET:        36 [pixels]
Y_OFFSET:        343 [pixels]
X_MAX:           1475 [pixels]
Y_MAX:           1782 [pixels]
DET_THRESH:      23
PHOTO_THRESH:    14
SL_URL:          sw00441454000msufc0868.fits
SUN_POSTN:       283.08d {+18h 52m 20s}  -22.89d {-22d 53' 31"}
SUN_DIST:         47.35 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.55d {+17h 30m 12s}  -24.05d {-24d 03' 12"}
MOON_DIST:        35.49 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 02 Jan 11 19:14:45 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     441454,   Seg_Num: 0
GRB_RA:          245.8813d {+16h 23m 31.51s} (J2000),
                 246.0148d {+16h 24m 03.55s} (current),
                 245.2749d {+16h 21m 05.98s} (1950)
GRB_DEC:          +7.6134d {+07d 36' 48.2"} (J2000),
                  +7.5884d {+07d 35' 18.3"} (current),
                  +7.7285d {+07d 43' 42.6"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68479.00 SOD {19:01:19.00} UT,   533.5 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       283.08d {+18h 52m 20s}  -22.89d {-22d 53' 31"}
SUN_DIST:         47.37 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.55d {+17h 30m 13s}  -24.05d {-24d 03' 11"}
MOON_DIST:        35.52 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.93, 36.23 [deg] galactic lon,lat of the burst
ECL_COORDS:      242.48, 28.78 [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:     Sun 02 Jan 11 19:14:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.895d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.592d {+07d 35' 30"} (J2000)
POINT_ROLL:      130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68813.70 SOD {19:06:53.70} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        6.872
N_STARS:         138
X_OFFSET:        36 [pixels]
Y_OFFSET:        343 [pixels]
X_MAX:           1475 [pixels]
Y_MAX:           1782 [pixels]
DET_THRESH:      23
PHOTO_THRESH:    14
SL_URL:          sw00441454000msufc0868.fits
SUN_POSTN:       283.08d {+18h 52m 20s}  -22.89d {-22d 53' 31"}
SUN_DIST:         47.35 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.55d {+17h 30m 13s}  -24.05d {-24d 03' 11"}
MOON_DIST:        35.50 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:15:53 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.895d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.592d {+07d 35' 30"} (J2000)
ROLL:            130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68813.70 SOD {19:06:53.70} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     315688020
X_OFFSET:        595 [pixels]
Y_OFFSET:        902 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       755
Y_GRB_POS:       1062
BINNING_INDEX:   1
IM_URL:          sw00441454000msuni0875.fits
SUN_POSTN:       283.09d {+18h 52m 20s}  -22.89d {-22d 53' 31"}
SUN_DIST:         47.35 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.57d {+17h 30m 16s}  -24.05d {-24d 03' 10"}
MOON_DIST:        35.50 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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:     Sun 02 Jan 11 19:16:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     441454,   Seg_Num: 0
POINT_RA:        245.895d {+16h 23m 35s} (J2000)
POINT_DEC:        +7.592d {+07d 35' 30"} (J2000)
ROLL:            130.936d
IMG_START_DATE:  15563 TJD;     2 DOY;   11/01/02
IMG_START_TIME:  68813.70 SOD {19:06:53.70} UT,   868.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     315688020
X_OFFSET:        595 [pixels]
Y_OFFSET:        902 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       755
Y_GRB_POS:       1062
BINNING_INDEX:   1
IM_URL:          sw00441454000msuni0875.fits
SUN_POSTN:       283.09d {+18h 52m 21s}  -22.89d {-22d 53' 31"}
SUN_DIST:         47.35 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:      262.57d {+17h 30m 17s}  -24.05d {-24d 03' 09"}
MOON_DIST:        35.50 [deg]
MOON_ILLUM:      3 [%]
GAL_COORDS:       21.91, 36.21 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      242.50, 28.76 [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 #11510
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 3361 s of XRT Photon Counting mode data and 7 UVOT images for GRB 110102A, 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 = 245.88117, +7.61377 which is equivalent to:
```
RA (J2000): 16h 23m 31.48s
Dec (J2000): +07d 36' 49.6"
```
with an uncertainty of 1.7 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #11511
T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), S. R. Oates (UCL-MSSL), D. M. Palmer (LANL), M. Stamatikos (OSU), 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 recent telemetry downlinks, we report further analysis of BAT GRB 110102A (trigger #441454) (Oates, et al., GCN Circ. 11509). The BAT ground-calculated position is RA, Dec = 245.877, 7.617 deg, which is
```
   RA(J2000)  =  16h 23m 30.5s 
   Dec(J2000) = +07d 37' 00.1" 
```
with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 66%.
The mask-weighted light curve shows a pair of small precursor peaks starting at ~T-50 sec and ending at ~T+50 sec. The main emission occurs with four peaks that start at ~T+100 sec and ending at ~T+340 with the maximum at ~T+210 sec. T90 (15-350 keV) is 264 +- 8 sec (estimated error including systematics).
The time-averaged spectrum from T-49.2 to T+294.9 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.60 +- 0.04. The fluence in the 15-150 keV band is 1.65 +- 0.03 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+208.76 sec in the 15-150 keV band is 8.4 +- 0.3 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/441454/BA/
GCN Circular #11512
Lin Lin (UAH) report on behalf of the Fermi GBM Team:
"At 18:54:36.00 UT on 2 Jan. 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 110102A (trigger 315687278 / 110102788). which was also detected by the Swift/BAT (S. R. Oates et al. 2011, GCN 11509) The GBM on-ground location is consistent with the Swift position.
The GBM light curve shows of several peaks with a duration (T90) of about 254 s (50-300 keV). The T90 starts at T0-119 s. The time-averaged spectrum from T0-123 s to T0+149 s is well fit by
a power law function with an exponential high-energy cutoff. The power law index is -1.49 +/- 0.02 and the cutoff energy, parameterized as Epeak, is 476.6 +/- 68.7 keV
The event fluence (10-1000 keV) in this time interval is (4.39 +/- 0.09)E-5 erg/cm^2. The 1 sec peak photon flux measured starting from T0+78 s in the 10-1000 keV band is 14.07 +/- 0.35 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #11513
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 110102A (Oates et al., GCN 11509) 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 2011-01-02 20:08:45 UT (~1.3 hours after the burst). We detected the afterglow candidate within the enhanced XRT error circle (Goad et al., GCNC 11510) in all the three bands.
Photometric results are listed below. We used SDSS catalog for flux calibration.
```
#T0+[day]  MID-UT    T-EXP[sec]   g'  g'_err   Rc  Rc_err   Ic  Ic_err
----------------------------------------------------------------------
0.06851    20:31:04  2340.0      20.0  0.4    19.6  0.3    18.3  0.2
----------------------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #11514
S. R. Oates (MSSL-UCL) and M. De Pasquale (MSSL-UCL) report on behalf of the Swift-UVOT team
The Swift/UVOT began settled observations of the field of GRB 110102A 156 s after the BAT trigger (Oates et al., GCN Circ. 11509). The optical afterglow is detected in the white, v, b and u filters at a refined UVO position RA(J2000)= 245.88087 deg, DEC(J2000) = 7.61383, which is:
```
  RA (J2000) =   16:23:31.41
  Dec (J2000) = +07:36:49.8
```
with an estimated uncertainty of 0.5 arcsec (radius, 90% confidence). This position is consistent with the enhanced XRT position (Goad et al., GCN Circ. 11510). The detection in u suggests a redshift of <2.5.
Preliminary magnitudes using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for single and summed exposures are:
```
Filter  T_start(s)  T_stop(s)   Exp(s)       Mag/3sigUL
#####################################################
wh (FC)   156          306       147       17.97 +/- 0.06
wh        868         1018       147       18.39 +/- 0.08
u  (FC)   314          564       246       17.98 +/- 0.09
u        1122         1315        39       18.89 +/- 0.62
v         816          835        19       17.86 +/- 0.53
b         597          589        19       17.60 +/- 0.20
uvw1      693         6331       452        > 20.09
uvm2      668         6126       292        > 19.87
uvw2      619         7152       471        > 20.35
#####################################################
```
The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.08 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #11515
S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report:
The long GRB 110102A, (Swift/BAT trigger=3D441454: Oates, et al., GCN 11509; Sakamoto et.al, GCN 11511) triggered Konus-Wind at T0=3D68074.462s UT (18:54:34.462)
The burst light curve consists of three major pulses, first two of them are much harder than the third one. The total duration of the burst is ~160 s. The emission is seen up to ~5 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB110102_T68074/
As observed by Konus-Wind the burst had a fluence of (5.4 =B1 0.9)x10-5 erg/cm2, and a 256-ms peak flux, measured from T0+76.032s, of (4.9 =B1 0.8)x10-6 erg/cm2/s (both in the 20 keV - 5 MeV energy range).
The time-integrated spectrum of the burst (from T0 to T0+164.096 s) is best fit in the 20 keV - 5 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha =3D -1.22 (-0.16, +0.26), the high energy photon index beta =3D -2.3 (< -0.9), the peak energy Ep =3D 267(-91, +111) keV, chi2 =3D 65/76 dof.
The spectrum at the maximum count rate (measured from T0+73.984 to T0+82.176 s) is best fit in the 20 keV - 5 MeV range by the GRB (Band) model, for which: the low-energy photon index alpha = -1.14 (-0.12, +0.15), the high energy photon index beta = -2.2 (-3.1, +0.3), the peak energy Ep = 436(-122, +180) keV, chi2 =3D 57/76 dof.
All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN Circular #11517
V. D'Elia, G. Stratta (ASDC) and S. R. Oates (MSSL-UCL) report on behalf of the Swift-XRT team:
We have analysed 18.8 ks of XRT data for GRB 110102A (Oates et al., GCN Circ. 11509), from 139 s to 47.5 ks after the BAT trigger. The data comprise 400 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 11510).
The light curve shows an intital flaring activity, possibly associated to the prompt event, followed by a canonical steep-flat-steep behaviour, which can be modelled with double broken power-law decay. The initial decay index is alpha= 8.6. At T+450 (+/- 0.05) s the decay flattens to an alpha of 0.49 (+/-0.03). At T+11.38 (+/- 0.01) ks the decay steepens again to an alpha of 1.53 (+0.07 -0.09).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.48 (+/-0.04). The best-fitting absorption column is 7.8 (+/- 1) x 10^20 cm^-2, in excess of the Galactic value of 4.8 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.27 (+/-0.07) and a best-fitting absorption column of 1.28 (+/- 0.17) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (5.8 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 1.6, the count rate at T+48 hours will be 0.012 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.3 x 10^-12 (2.1 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/00441454.
This circular is an official product of the Swift-XRT team.
GCN Report 315.1
GCN_Report 315.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_315_1.pdf by S.R. Oates at MSSL-UCL titled: "Final report on Swift Observations of GRB 110102A"

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Jochen Greiner, last update: 02-Jan-2011 [Disclaimer]