Gamma-ray Burst 111103B

(All information courtesy of the instrument teams.)

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 10:59:20 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     506903,   Seg_Num: 0
GRB_RA:          265.704d {+17h 42m 49s} (J2000),
                 265.853d {+17h 43m 25s} (current),
                 265.071d {+17h 40m 17s} (1950)
GRB_DEC:          +1.590d {+01d 35' 23"} (J2000),
                  +1.585d {+01d 35' 06"} (current),
                  +1.612d {+01d 36' 44"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       6233 [cnts]    Image_Peak=624 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       25971 [cnts]
BKG_TIME:        39528.46 SOD {10:58:48.46} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15868 TJD;   307 DOY;   11/11/03
GRB_TIME:        39543.95 SOD {10:59:03.95} UT
GRB_PHI:         -84.14 [deg]
GRB_THETA:        13.60 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     47.33 [sigma]
IMAGE_SIGNIF:    16.72 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +5  +0  +0 -64  +0 
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 22"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.57d {+21h 22m 18s}  -10.44d {-10d 26' 32"}
MOON_DIST:        55.75 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.38, 15.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      265.26, 24.96 [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 = 120.86,-6.48 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:00:32 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     506903,   Seg_Num: 0
GRB_RA:          265.6955d {+17h 42m 46.91s} (J2000),
                 265.8453d {+17h 43m 22.88s} (current),
                 265.0628d {+17h 40m 15.08s} (1950)
GRB_DEC:          +1.6107d {+01d 36' 38.5"} (J2000),
                  +1.6058d {+01d 36' 21.0"} (current),
                  +1.6331d {+01d 37' 59.2"} (1950)
GRB_ERROR:       5.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       2.05e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.94 [sigma]
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39603.15 SOD {11:00:03.15} UT,   59.2 [sec] since BAT Trigger Time
TAM[0-3]:        327.66 237.21 261.55 243.68
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 23"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.58d {+21h 22m 20s}  -10.44d {-10d 26' 19"}
MOON_DIST:        55.77 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.98 [deg] galactic lon,lat of the burst
ECL_COORDS:      265.25, 24.98 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.34 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:00:42 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     506903,   Seg_Num: 0
GRB_RA:          265.6955d {+17h 42m 46.9s} (J2000),
                 265.8453d {+17h 43m 22.8s} (current),
                 265.0628d {+17h 40m 15.0s} (1950)
GRB_DEC:          +1.6107d {+01d 36' 38.5"} (J2000),
                  +1.6058d {+01d 36' 21.0"} (current),
                  +1.6331d {+01d 37' 59.2"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       80 [cnts]
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39603.15 SOD {11:00:03.15} UT,   59.2 [sec] since BAT Trigger Time
CENTROID_X:      281.71,  raw= 282  [pixels]
CENTROID_Y:      269.09,  raw= 269  [pixels]
ROLL:            248.75 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -68.13
GRB_POS_XRT_Z:   -51.81
IMAGE_URL:       sw00506903000msxps_rw.img
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 23"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.59d {+21h 22m 20s}  -10.44d {-10d 26' 17"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.98 [deg] galactic lon,lat of the burst
ECL_COORDS:      265.25, 24.98 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:00:54 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     506903,   Seg_Num: 0
GRB_RA:          265.6955d {+17h 42m 46.9s} (J2000),
                 265.8453d {+17h 43m 22.8s} (current),
                 265.0628d {+17h 40m 15.0s} (1950)
GRB_DEC:          +1.6107d {+01d 36' 38.5"} (J2000),
                  +1.6058d {+01d 36' 21.0"} (current),
                  +1.6331d {+01d 37' 59.2"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       80 [cnts]
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39603.15 SOD {11:00:03.15} UT,   59.2 [sec] since BAT Trigger Time
CENTROID_X:      281.71,  raw= 282  [pixels]
CENTROID_Y:      269.09,  raw= 269  [pixels]
ROLL:            248.75 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -68.13
GRB_POS_XRT_Z:   -51.81
IMAGE_URL:       sw00506903000msxps_rw.img
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 24"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.59d {+21h 22m 21s}  -10.44d {-10d 26' 15"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.98 [deg] galactic lon,lat of the burst
ECL_COORDS:      265.25, 24.98 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:02:48 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     506903,   Seg_Num: 0
GRB_RA:          265.704d {+17h 42m 49s} (J2000),
                 265.853d {+17h 43m 25s} (current),
                 265.071d {+17h 40m 17s} (1950)
GRB_DEC:          +1.590d {+01d 35' 23"} (J2000),
                  +1.585d {+01d 35' 06"} (current),
                  +1.612d {+01d 36' 44"} (1950)
GRB_DATE:        15868 TJD;   307 DOY;   11/11/03
GRB_TIME:        39543.95 SOD {10:59:03.95} UT
TRIGGER_INDEX:   146
GRB_PHI:         -84.14 [deg]
GRB_THETA:        13.60 [deg]
DELTA_TIME:      52.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     47.33 [sigma]
IMAGE_SIGNIF:    16.72 [sigma]
LC_URL:          sw00506903000msb.lc
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 25"}
SUN_DIST:         49.92 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.60d {+21h 22m 25s}  -10.43d {-10d 25' 54"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.38, 15.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      265.26, 24.96 [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 = 120.86,-6.48 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:03:54 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
POINT_ROLL:      248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39612.28 SOD {11:00:12.28} UT,   68.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.464
N_STARS:         190
X_OFFSET:        568 [pixels]
Y_OFFSET:        480 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1439 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00506903000msufc0068.fits
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 26"}
SUN_DIST:         49.94 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.61d {+21h 22m 27s}  -10.43d {-10d 25' 43"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:04:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
POINT_ROLL:      248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39612.28 SOD {11:00:12.28} UT,   68.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.464
N_STARS:         190
X_OFFSET:        568 [pixels]
Y_OFFSET:        480 [pixels]
X_MAX:           1527 [pixels]
Y_MAX:           1439 [pixels]
DET_THRESH:      18
PHOTO_THRESH:    10
SL_URL:          sw00506903000msufc0068.fits
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 26"}
SUN_DIST:         49.94 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.61d {+21h 22m 27s}  -10.43d {-10d 25' 39"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [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:     Thu 03 Nov 11 11:04:31 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
ROLL:            248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39612.28 SOD {11:00:12.28} UT,   68.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     342010819
X_OFFSET:        963 [pixels]
Y_OFFSET:        939 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1123
Y_GRB_POS:       1099
BINNING_INDEX:   1
IM_URL:          sw00506903000msuni0076.fits
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 26"}
SUN_DIST:         49.94 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.62d {+21h 22m 28s}  -10.43d {-10d 25' 36"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [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:     Thu 03 Nov 11 11:04:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
ROLL:            248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39612.28 SOD {11:00:12.28} UT,   68.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     342010819
X_OFFSET:        963 [pixels]
Y_OFFSET:        939 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1123
Y_GRB_POS:       1099
BINNING_INDEX:   1
IM_URL:          sw00506903000msuni0076.fits
SUN_POSTN:       218.25d {+14h 33m 00s}  -15.02d {-15d 01' 27"}
SUN_DIST:         49.94 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.62d {+21h 22m 28s}  -10.43d {-10d 25' 33"}
MOON_DIST:        55.78 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:10:23 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
POINT_ROLL:      248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39825.38 SOD {11:03:45.38} UT,   281.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.517
N_STARS:         70
X_OFFSET:        643 [pixels]
Y_OFFSET:        619 [pixels]
X_MAX:           1602 [pixels]
Y_MAX:           1578 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00506903000msufc0281.fits
SUN_POSTN:       218.26d {+14h 33m 01s}  -15.03d {-15d 01' 31"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.66d {+21h 22m 40s}  -10.41d {-10d 24' 32"}
MOON_DIST:        55.83 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.  
COMMENTS:        The Pointing RA,Dec,Roll values came from the 1st SrcList Notice.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 11:11:44 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
ROLL:            248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39825.38 SOD {11:03:45.38} UT,   281.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     342011032
X_OFFSET:        963 [pixels]
Y_OFFSET:        939 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1123
Y_GRB_POS:       1099
BINNING_INDEX:   1
IM_URL:          sw00506903000msuni0289.fits
SUN_POSTN:       218.26d {+14h 33m 02s}  -15.03d {-15d 01' 32"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.68d {+21h 22m 42s}  -10.41d {-10d 24' 18"}
MOON_DIST:        55.84 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The Pointing RA,Dec,Roll values came from the 1st Image Notice.  
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:     Thu 03 Nov 11 11:12:04 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     506903,   Seg_Num: 0
POINT_RA:        265.715d {+17h 42m 52s} (J2000)
POINT_DEC:        +1.598d {+01d 35' 52"} (J2000)
ROLL:            248.746d
IMG_START_DATE:  15868 TJD;   307 DOY;   11/11/03
IMG_START_TIME:  39825.38 SOD {11:03:45.38} UT,   281.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     342011032
X_OFFSET:        963 [pixels]
Y_OFFSET:        939 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1123
Y_GRB_POS:       1099
BINNING_INDEX:   1
IM_URL:          sw00506903000msuni0289.fits
SUN_POSTN:       218.26d {+14h 33m 02s}  -15.03d {-15d 01' 32"}
SUN_DIST:         49.93 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      320.68d {+21h 22m 43s}  -10.40d {-10d 24' 14"}
MOON_DIST:        55.84 [deg]
MOON_ILLUM:      58 [%]
GAL_COORDS:       26.39, 15.96 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      265.27, 24.97 [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 Circular #12519
D. Grupe (PSU), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), V. D'Elia (ASDC), P. A. Evans (U Leicester), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), A. Melandri (INAF-OAB), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC), M. C. Stroh (PSU) and B.-B. Zhang (PSU) report on behalf of the Swift Team:
At 10:59:03 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111103B (trigger=506903). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 265.704, +1.590 which is
```
   RA(J2000) = 17h 42m 49s
   Dec(J2000) = +01d 35' 23"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a bright main peak from T+0 to T+20 s and continued activity to a duration of at least 150 sec. The peak count rate was ~15000 counts/sec (15-350 keV), at ~6 sec after the trigger.
The XRT began observing the field at 11:00:03.1 UT, 59.2 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 265.6955, +1.6107 which is equivalent to:
```
   RA(J2000)  = 17h 42m 46.91s
   Dec(J2000) = +01d 36' 38.5"
```
with an uncertainty of 5.1 arcseconds (radius, 90% containment). This location is 79 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 102 seconds with the U filter starting 281 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. Data from the list of sources generated on-board are not available at this time. No correction has been made for the expected extinction corresponding to E(B-V) of 0.29.
We note that this location is in a crowded field 30 degrees from the Galactic center. In particular the XRT position is near (7.4 arcseconds) the high proper motion star G 20-10. Thus this burst may be from a Galactic source. We will require data from the Malindi ground link to make this determination.
Burst Advocate for this burst is D. Grupe (grupe 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 #12520
K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev,E.Konstantinov, Irkutsk State University
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Sankovich Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka
V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka(Siberia) was pointed to the GRB111103.46 19 sec s after notice time and 42 sec after GRB time at 2011-11-03 10:59:45.246 UT. On our first unfiltered 10s exposure set we haven`t found optical transient within SWIFT error-box (Grupe et al, GCN Circ 12519).
The 5-sigma upper limit has been about 14.7mag
The message may be cited.
GCN Circular #12524
S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+418 sec from recent telemetry downlinks, we report further analysis of BAT GRB 111103B (trigger #506903) (Grupe, et al., GCN Circ. 12519). The BAT ground-calculated position is RA, Dec = 265.691, 1.605 deg which is
```
   RA(J2000)  =  17h 42m 45.8s 
   Dec(J2000) = +01d 36' 19.4" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 90%.
The mask-weighted light curve shows at least 4 overlapping peaks in the first group: starting at ~T-25 sec, with the brightest peak at ~T+8 sec, and ending at ~T+90 sec. The second group of peaks starts at ~T+100 sec and ends at ~T+250 sec. T90 (15-350 keV) is 167 +- 35 sec (estimated error including systematics).
The time-averaged spectrum from T-6.55 to T+250.78 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.41 +- 0.05. The fluence in the 15-150 keV band is 8.0 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+5.48 sec in the 15-150 keV band is 7.2 +- 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/506903/BA/

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 03 Nov 11 15:51:26 UT
NOTICE_TYPE:     Swift-BAT Slew GRB Position
ID_NUM:          667
GRB_RA:          265.700d {+17h 42m 48s} (J2000),
                 265.850d {+17h 43m 24s} (current),
                 265.067d {+17h 40m 16s} (1950)
GRB_DEC:          +1.590d {+01d 35' 24"} (J2000),
                  +1.585d {+01d 35' 07"} (current),
                  +1.612d {+01d 36' 45"} (1950)
GRB_ERROR:       2.00 [arcmin radius, statistical only]
GRB_INTEN:       360206 [cnts]    Image_Peak=13122 [image_cnts]
TRIGGER_DUR:     34.000 [sec] 
TRIGGER_INDEX:   10     Criteria: S(15-50) > 4.0 sigma  AND  H(50-150) > 4.0 sigma
ENERGY_RANGE:    15-150 keV
BKG_INTEN:       2452109 [cnts]
BKG_TIME:        39304.48 SOD {10:55:04.48} UT
BKG_DUR:         255 [sec]
GRB_DATE:        15868 TJD;   307 DOY;   11/11/03
GRB_TIME:        39559.48 SOD {10:59:19.48} UT
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    36.47 [sigma]
SUN_POSTN:       218.45d {+14h 33m 48s}  -15.09d {-15d 05' 10"}
SUN_DIST:         49.75 [deg]   Sun_angle= -3.2 [hr] (East of Sun)
MOON_POSTN:      322.97d {+21h 31m 53s}   -9.56d {-09d 33' 34"}
MOON_DIST:        57.96 [deg]
MOON_ILLUM:      60 [%]
GAL_COORDS:       26.38, 15.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      265.26, 24.96 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT Slew GRB Coordinates.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        Extremely high confidence of reality (gold-plated).  
COMMENTS:        This Notice was ground-processed from flight-data.  
COMMENTS:

GCN Circular #12525
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 1541 s of XRT Photon Counting mode data and 4 UVOT images for GRB 111103B, 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 = 265.69322, +1.61007 which is equivalent to:
```
RA (J2000): 17h 42m 46.37s
Dec (J2000): +01d 36' 36.3"
```
with an uncertainty of 1.5 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 #12527
D. Denisenko (IKI, Moscow), V. Gerke and S. Korotkiy (Ka-Dar observatory, Russia) report:
Position of GRB 111103B (Grupe et al., GCN 12519; Barthelmy et al., GCN 12524; Goad et al., GCN 12525) was observed by 40-cm Djigit telescope of Ka-Dar observatory's TAU station (Nizhniy Arkhyz, Karachay-Cherkessia) equipped with SBIG STL-11K CCD from 15:35 UT to 16:04 UT on 2011 Nov. 03 (4.6-5.1 hr after the burst trigger). In total, 10 unfiltered 120-sec exposures were taken.
There are no new sources detected in the error box of GRB 111103B on the combined image, as compared to Red DSS plate of similar depth. The limiting magnitude of the combined image (SNR=3) is R~20.2. The sum of nine best frames (effective exposure of 18 minutes centered at 15:50 UT) is available at http://pics.livejournal.com/bigdenru/pic/000ak676/ (5'x5' crop).
We have also measured the light curve of the nearby star G 20-10 = 2MASS 17424702+0136326 (J=11.060+/-0.023, K=10.232+/-0.023) to check for its variability. The star has remained constant within 0.01 mag during our 0.5 hr observations. It is far from saturation with no more than 13000 ADU on the individual images.
This message can be cited.
GCN Circular #12528
S. R. Oates (MSSL-UCL) and D. Grupe (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111103B 68 s after the BAT trigger (Grupe et al., GCN Circ. 12519). No optical afterglow consistent with the XRT position (Goad et al., GCN Circ. 12525) is detected in the initial UVOT exposures. The lack of an optical detection at the XRT refined position excludes the possibility that the trigger is associated with the high proper motion star (v~15mag) mentioned in Grupe et al. (GCN Circ. 12519) confirming that the BAT trigger 506903 is a GRB.
Preliminary 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            68          218          147         >20.6
white               68         5055          344         >21.1
v                 5266         5466          197         >19.1
b                 4650         6161          270         >20.0
u                  281         6081          297         >20.2
w1                5677         5876          197         >19.9
m2                5471         5670          197         >19.8
w2                5061         5261          197         >20.3
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.29 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #12530
D. Grupe (PSU) reports on behalf of the Swift-XRT team:
We have analysed 5.1 ks of XRT data for GRB 111103B (Grupe et al. GCN Circ. 12519), from 49 s to 33.3 ks after the BAT trigger. The data comprise 335 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 12525).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=3.1 (+0.4, -0.3). At T+94.2 s the decay flattens to an alpha of 0.59 (+0.05, -0.07) before breaking again at T+8356 s to a final decay with index alpha=1.32 (+0.13, -0.14).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.97 (+0.05, -0.04). The best-fitting absorption column is 2.90 (+0.16, -0.15) x 10^21 cm^-2, in excess of the Galactic value of 9.1 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.85 (+0.13, -0.12) and a best-fitting absorption column of 2.7 (+/-0.5) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.4 x 10^-11 (6.3 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     2.7 (+/-0.5) x 10^21 cm^-2
Galactic foreground: 9.1 x 10^20 cm^-2
Excess significance: 9.8 sigma
Photon index:	     1.85 (+0.13, -0.12)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00506903.
This circular is an official product of the Swift-XRT team.
GCN Circular #12531
Ralf Kotulla, Atish Kamble, David Kaplan (UW-Milwaukee) and Nial Tanvir (U. Leicester) report :
We observed the field of strong GRB 111103B (Palmer et al., GCN 12519) using the WIYN High Resolution Infrared Camera (WHIRC) on the WIYN 3.5m telescope, beginning at November 4.08 (UT), approximately 15 hours after the burst. Observations were carried out using the Ks filter, and the seeing was about 1 arcsec.
We detect a faint object within the improved XRT error circle (Goad et al., GCN 12525). The preliminary magnitude of this source is K = 18.6 +/- 0.4, but our observations do not allow us to make any statement about variability. The source appears point-like, but the poor signal-to-noise means we could not rule out it being slightly extended.
Further deep observations are encouraged for variability check and possible association with the GRB.
The combined WIYN image of the field is available at : http://members.galev.org/shared/GRB_111103B/whirc_zoom.jpg
We acknowledge the support from the staff of WIYN-3.5m telescope, and especially from Greg Mosby in carrying out these observations.
GCN Circular #12532
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 111103B (Swift-BAT trigger #505054: Grupe et al., GCN 12519; Barthelmy et al., GCN 12524) triggered Konus-Wind at T0=39541.020s UT (10:59:01.020)
The light curve shows a ~15 s long pulse followed by a weaker activity continuing till ~(T0+40)s. The second group of peaks observed by Swift/BAT after T0+100 is poorly determined in the Konus-Wind light curves against the background of a rising M2.5 Solar flare. The emission in the initial peak complex is seen up to ~4 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB111103_T39541/
As observed by Konus-Wind the burst had a fluence of (2.0 +/-0.3)x10-5 erg/cm2, and a 256-ms peak flux, measured from T0+5.120 s, of (2.7 +/-0.4)x10-6 erg/cm2/s (both in the 20 keV - 5 MeV energy range).
The time-integrated spectrum of the burst (measured from T0 to T0+41.216 s) is best fitted in the 20 keV - 5 MeV range by a power law with exponential cutoff model, for which alpha = -0.97 (-0.18, +0.19), and Ep = 372(-69, +109) keV, chi2 = 77.2/77 dof. Fitting this spectrum by the GRB (Band) function yields the same alpha and Ep with a high energy photon index beta < -2.2 (chi2 = 77.1/76 dof).
The spectrum at the maximum count rate (measured from T0 to T0+6.144 s) is best fitted in the 20 keV - 5 MeV range by a power law with exponential cutoff model, for which alpha = -0.97 (-0.12, +0.14), and Ep = 393(-55, +76) keV, chi2 = 70.2/77 dof.
All the observed properties are typical for a moderately intense long gamma-ray burst and don't argue for a Galactic transient hypothesis.
All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN Circular #12533
S. Song, Y. Aoki, R. Usui, K. Kawakami, M. Hayashi, K. Tokoyoda, Y. Saito, Y. Yatsu, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed GRB 111103B (D. Grupe et al, GCN12519) with the optical three color (g, Rc, and Ic) CCD camera attached to the MITSuME 50 cm telescope of Akeno Observatory, Yamanashi, Japan.
We started the observation about ~10.5 hour after the BAT trigger from 2011-11-04 9:35:15 UT. And we did not find any new point source within the XRT error circle (S. D. Barthelmy et al, GCN12524) in three b= ands. The results of photometry (3sigma upper limits) are listed below.
#The photon flux were calibrated against GSC2.3 catalog.
```
T0+[day]      MID-UT     T-EXP[sec]      g'             Rc           Ic
-------------------------------------------------------------------------=
--------


 3.7=D710^4     9:44:05        1020       -----       >17.9       >18.0
-------------------------------------------------------------------------=
--------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #12546
A.Volnova (SAI MSU), M. Andreev, A. Sergeev (Terskol Branch of INASAN), V. Petkov (Baksan Neutrino Observatory of INR), N. Karpov, O. Andrienko, K. Martynyuk-Lototsky, N. Parakhin, N. Borachok, V. Kozlov, G. Butenko, V. Godunova (IC AMER, NASU), A. Pozanenko (IKI) report:
We observed field of the Swift GRB 111103B (Grupe et al. GCN 12519) with Zeiss-600 telescope of Mt.Terskol observatory in R filter between Nov. 3 (UT) 15:07:44 - 15:17:50. We took 10 images of 60 exposure under good weather conditions and mean seeing (FWHW) of about 1.6". We do not detect any source within enhanced XRT position (Goad et al., GCN 12525). A photometry is based on the USNO B1.0 nearby stars.
```
  T0+      Filter,   Exposure, OT,  UpperLimit
(mid, d)               (s)

0.17619  R         10x60       n/d   17.5
```
GCN Circular #12547
V. Rumyantsev, N. Pit (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed field of the Swift GRB 111103B (Grupe et al. GCN 12519) with AZT-11 telescope of CrAO in R filter between Nov. 3 (UT) 16:12:05 - 17:00:21. We took several images of 180 exposure under unfavorable weather conditions and mean seeing (FWHW) of about 4". We do not detect any source within enhanced XRT position (Goad et al., GCN 12525). A photometry is based on the USNO B1.0 nearby stars.
```
  T0+      Filter,   Exposure, OT,  UpperLimit
(mid, d)               (s)

 0.2352  R         16x180       n/d   19.4
```
GCN Report 349.1
GCN_Report 349.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_349_1.pdf by D. Grupe at PSU titled: "Final Swift Observations of GRB 111103B"
GCN Circular #12708
V. Rumyantsev (CrAO), V. Biryukov (SAI MSU, CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed field of the Swift GRB 111103B (Grupe et al. GCN 12519) with Zeiss-600 telescope of Crimean branch of SAI MSU in R filter between Nov. 3 (UT) 15:44:07 - 17:02:29. We took 73 images of 60 exposure under bad weather conditions and mean seeing (FWHW) of about 3.4". We do not detect any source within enhanced XRT position (Goad et al., GCN 12525). A photometry is based on the USNO B1.0 star 0916-0323572 (RA = 17:42:46.95, Dec = +01:36:05.2, J2000) assuming R = 15.67.
```
 T0+        Filter, Exposure, OT,  UpperLimit
 (mid, d)            (s)

 0.22517  R        73x60      n/d   20.4
```

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Jochen Greiner, last update: 20-Dec-2011 [Disclaimer]