Gamma-ray Burst 111107A

(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:     Mon 07 Nov 11 00:50:41 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.484d {+08h 37m 56s} (J2000),
                 129.518d {+08h 38m 04s} (current),
                 129.336d {+08h 37m 21s} (1950)
GRB_DEC:         -66.506d {-66d 30' 21"} (J2000),
                 -66.548d {-66d 32' 52"} (current),
                 -66.329d {-66d 19' 45"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       3802 [cnts]    Image_Peak=188 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       23406 [cnts]
BKG_TIME:        3008.45 SOD {00:50:08.45} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15872 TJD;   311 DOY;   11/11/07
GRB_TIME:        3024.00 SOD {00:50:24.00} UT
GRB_PHI:         -108.42 [deg]
GRB_THETA:        21.83 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     13.85 [sigma]
IMAGE_SIGNIF:    8.26 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  -1  +0  +0 -24  +0 
SUN_POSTN:       221.79d {+14h 47m 10s}  -16.12d {-16d 06' 53"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.71d {+00h 02m 51s}   +5.73d {+05d 43' 47"}
MOON_DIST:       109.86 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.28,-15.02 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      198.03,-74.54 [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 = 85.34,-1.05 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:50:44 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      47
TRIGGER_NUM:     342319827     
GRB_RA:          152.300d {+10h 09m 12s} (J2000),
                 152.391d {+10h 09m 34s} (current),
                 151.916d {+10h 07m 40s} (1950)
GRB_DEC:         -63.250d {-63d 15' 00"} (J2000),
                 -63.308d {-63d 18' 29"} (current),
                 -63.004d {-63d 00' 13"} (1950)
GRB_ERROR:       17.88 [deg radius, statistical plus systematic]
GRB_INTEN:       83 [cnts/sec] 
DATA_SIGNIF:     6.50 [sigma]  
INTEG_TIME:      4.096 [sec]   
GRB_DATE:        15872 TJD;   311 DOY;   11/11/07
GRB_TIME:        3025.48 SOD {00:50:25.48} UT
GRB_PHI:         260.98 [deg]  
GRB_THETA:       125.00 [deg]  
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.08
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      98%  GRB     
2nd_MOST_LIKELY:   2%  Generic SGR
DETECTORS:       0,0,0, 0,1,0, 0,0,1, 0,0,0, 0,0,
SUN_POSTN:       221.79d {+14h 47m 10s}  -16.12d {-16d 06' 53"}
SUN_DIST:         66.43 [deg]   Sun_angle= 4.6 [hr] (West of Sun)
MOON_POSTN:        0.71d {+00h 02m 51s}   +5.73d {+05d 43' 47"}
MOON_DIST:       118.86 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      285.82, -5.90 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      202.28,-64.49 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.
COMMENTS:        This trigger occurred at longitude,latitude = 342.48,-0.87 [deg].
COMMENTS:
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=507185).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:52:01 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.4758d {+08h 37m 54.19s} (J2000),
                 129.5103d {+08h 38m 02.47s} (current),
                 129.3284d {+08h 37m 18.82s} (1950)
GRB_DEC:         -66.5204d {-66d 31' 13.4"} (J2000),
                 -66.5624d {-66d 33' 44.4"} (current),
                 -66.3437d {-66d 20' 37.2"} (1950)
GRB_ERROR:       6.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       4.37e-10 [erg/cm2/sec]
GRB_SIGNIF:      4.47 [sigma]
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3088.75 SOD {00:51:28.75} UT,   64.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.65 237.22 261.61 243.41
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       221.79d {+14h 47m 11s}  -16.12d {-16d 06' 54"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.72d {+00h 02m 53s}   +5.73d {+05d 44' 01"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.29,-15.03 [deg] galactic lon,lat of the burst
ECL_COORDS:      198.08,-74.55 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.87 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:52:11 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.4758d {+08h 37m 54.1s} (J2000),
                 129.5103d {+08h 38m 02.4s} (current),
                 129.3284d {+08h 37m 18.8s} (1950)
GRB_DEC:         -66.5204d {-66d 31' 13.4"} (J2000),
                 -66.5624d {-66d 33' 44.4"} (current),
                 -66.3437d {-66d 20' 37.2"} (1950)
GRB_ERROR:       6.5 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       20 [cnts]
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3088.75 SOD {00:51:28.75} UT,   64.8 [sec] since BAT Trigger Time
CENTROID_X:      288.05,  raw= 288  [pixels]
CENTROID_Y:      282.64,  raw= 283  [pixels]
ROLL:            98.70 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -36.20
GRB_POS_XRT_Z:   -36.88
IMAGE_URL:       sw00507185000msxps_rw.img
SUN_POSTN:       221.79d {+14h 47m 11s}  -16.12d {-16d 06' 55"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.72d {+00h 02m 54s}   +5.73d {+05d 44' 03"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.29,-15.03 [deg] galactic lon,lat of the burst
ECL_COORDS:      198.08,-74.55 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:52:20 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.4758d {+08h 37m 54.1s} (J2000),
                 129.5103d {+08h 38m 02.4s} (current),
                 129.3284d {+08h 37m 18.8s} (1950)
GRB_DEC:         -66.5204d {-66d 31' 13.4"} (J2000),
                 -66.5624d {-66d 33' 44.4"} (current),
                 -66.3437d {-66d 20' 37.2"} (1950)
GRB_ERROR:       6.5 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       20 [cnts]
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3088.75 SOD {00:51:28.75} UT,   64.8 [sec] since BAT Trigger Time
CENTROID_X:      288.05,  raw= 288  [pixels]
CENTROID_Y:      282.64,  raw= 283  [pixels]
ROLL:            98.70 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -36.20
GRB_POS_XRT_Z:   -36.88
IMAGE_URL:       sw00507185000msxps_rw.img
SUN_POSTN:       221.79d {+14h 47m 11s}  -16.12d {-16d 06' 55"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.73d {+00h 02m 54s}   +5.73d {+05d 44' 05"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.29,-15.03 [deg] galactic lon,lat of the burst
ECL_COORDS:      198.08,-74.55 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

  
TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:53:35 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     342319827     
GRB_RA:          139.500d {+09h 18m 00s} (J2000),
                 139.560d {+09h 18m 14s} (current),
                 139.245d {+09h 16m 59s} (1950)
GRB_DEC:         -64.900d {-64d 54' 00"} (J2000),
                 -64.950d {-64d 57' 00"} (current),
                 -64.689d {-64d 41' 18"} (1950)
GRB_ERROR:       5.32 [deg radius, statistical only]
DATA_SIGNIF:     9.40 [sigma]  
DATA_INTERVAL:   4.096 [sec]   
GRB_DATE:        15872 TJD;   311 DOY;   11/11/07
GRB_TIME:        3025.48 SOD {00:50:25.48} UT
GRB_PHI:         256.00 [deg]  
GRB_THETA:       121.00 [deg]  
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       221.80d {+14h 47m 11s}  -16.12d {-16d 06' 56"}
SUN_DIST:         72.16 [deg]   Sun_angle= 5.5 [hr] (West of Sun)
MOON_POSTN:        0.73d {+00h 02m 56s}   +5.74d {+05d 44' 19"} 
MOON_DIST:       114.06 [deg]  
MOON_ILLUM:      88 [%]
GAL_COORDS:      282.66,-10.81 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      198.42,-70.12 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.
COMMENTS:        This Notice was ground-generated -- not flight-generated.
COMMENTS:
COMMENTS:        NOTE: This GBM event is temporally(1.0<100sec) coincident with the SWIFT_BAT event (trignum=507185).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:54:18 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.484d {+08h 37m 56s} (J2000),
                 129.518d {+08h 38m 04s} (current),
                 129.336d {+08h 37m 21s} (1950)
GRB_DEC:         -66.506d {-66d 30' 21"} (J2000),
                 -66.548d {-66d 32' 52"} (current),
                 -66.329d {-66d 19' 45"} (1950)
GRB_DATE:        15872 TJD;   311 DOY;   11/11/07
GRB_TIME:        3024.00 SOD {00:50:24.00} UT
TRIGGER_INDEX:   146
GRB_PHI:         -108.42 [deg]
GRB_THETA:        21.83 [deg]
DELTA_TIME:      45.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     13.85 [sigma]
IMAGE_SIGNIF:    8.26 [sigma]
LC_URL:          sw00507185000msb.lc
SUN_POSTN:       221.80d {+14h 47m 11s}  -16.12d {-16d 06' 56"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.74d {+00h 02m 58s}   +5.74d {+05d 44' 26"}
MOON_DIST:       109.86 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.28,-15.02 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      198.03,-74.54 [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 = 85.34,-1.05 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:54:42 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.457d {+08h 37m 50s} (J2000)
POINT_DEC:       -66.509d {-66d 30' 30"} (J2000)
POINT_ROLL:      98.694d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3097.09 SOD {00:51:37.09} UT,   73.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.500
N_STARS:         177
X_OFFSET:        544 [pixels]
Y_OFFSET:        472 [pixels]
X_MAX:           1503 [pixels]
Y_MAX:           1431 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00507185000msufc0073.fits
SUN_POSTN:       221.80d {+14h 47m 11s}  -16.12d {-16d 06' 56"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.74d {+00h 02m 58s}   +5.74d {+05d 44' 31"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.03 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 00:55:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.457d {+08h 37m 50s} (J2000)
POINT_DEC:       -66.509d {-66d 30' 30"} (J2000)
POINT_ROLL:      98.694d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3097.09 SOD {00:51:37.09} UT,   73.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.500
N_STARS:         177
X_OFFSET:        544 [pixels]
Y_OFFSET:        472 [pixels]
X_MAX:           1503 [pixels]
Y_MAX:           1431 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00507185000msufc0073.fits
SUN_POSTN:       221.80d {+14h 47m 11s}  -16.12d {-16d 06' 57"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.75d {+00h 02m 59s}   +5.74d {+05d 44' 35"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.03 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [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:     Mon 07 Nov 11 00:56:35 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.457d {+08h 37m 50s} (J2000)
POINT_DEC:       -66.509d {-66d 30' 30"} (J2000)
ROLL:            98.694d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3097.09 SOD {00:51:37.09} UT,   73.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     342319904
X_OFFSET:        909 [pixels]
Y_OFFSET:        888 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1069
Y_GRB_POS:       1048
BINNING_INDEX:   1
IM_URL:          sw00507185000msuni0081.fits
SUN_POSTN:       221.80d {+14h 47m 11s}  -16.12d {-16d 06' 58"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.76d {+00h 03m 02s}   +5.75d {+05d 44' 52"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.03 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [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:     Mon 07 Nov 11 00:56:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.457d {+08h 37m 50s} (J2000)
POINT_DEC:       -66.509d {-66d 30' 30"} (J2000)
ROLL:            98.694d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3097.09 SOD {00:51:37.09} UT,   73.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     342319904
X_OFFSET:        909 [pixels]
Y_OFFSET:        888 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1069
Y_GRB_POS:       1048
BINNING_INDEX:   1
IM_URL:          sw00507185000msuni0081.fits
SUN_POSTN:       221.80d {+14h 47m 11s}  -16.12d {-16d 06' 58"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.76d {+00h 03m 02s}   +5.75d {+05d 44' 55"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.03 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [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:     Mon 07 Nov 11 00:58:10 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.4777d {+08h 37m 54.64s} (J2000),
                 129.5122d {+08h 38m 02.93s} (current),
                 129.3303d {+08h 37m 19.27s} (1950)
GRB_DEC:         -66.5200d {-66d 31' 11.9"} (J2000),
                 -66.5620d {-66d 33' 43.0"} (current),
                 -66.3433d {-66d 20' 35.7"} (1950)
GRB_ERROR:       0.7 [arcsec radius, statistical only]
GRB_MAG:         19.20 +/- 0.16 [mag]
FILTER:          10, White
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3097.00 SOD {00:51:37.00} UT,   73.0 [sec] since BAT Trigger Time
SUN_POSTN:       221.80d {+14h 47m 12s}  -16.12d {-16d 07' 00"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.77d {+00h 03m 05s}   +5.75d {+05d 45' 09"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.29,-15.03 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      198.08,-74.55 [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 2.9 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #12534
M. H. Siegel (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-OAB/IASFPA), C. A. Swenson (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
At 00:50:24 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111107A (trigger=507185). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 129.484, -66.506 which is
```
   RA(J2000)  =  08h 37m 56s
   Dec(J2000) = -66d 30' 21"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single FRED-like peak with a duration of about 15 sec. The peak count rate was ~1600 counts/sec (15-350 keV), at ~2 sec after the trigger.
The XRT began observing the field at 00:51:28.8 UT, 64.8 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 129.47682, -66.52012 which is equivalent to:
```
   RA(J2000)  = 08h 37m 54.44s
   Dec(J2000) = -66d 31' 12.4"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 51 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (8.93 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.6 (+2.29/-1.97) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 4.37e-10 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 73 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	08:37:54.66 = 129.47775
  DEC(J2000) = -66:31:12.3  = -66.52009
```
with a 90%-confidence error radius of about 0.65 arc sec. This position is 1.3 arc sec. from the center of the XRT error circle. The estimated magnitude is 19.21 with a 1-sigma error of about 0.16. No correction has been made for the expected extinction corresponding to E(B-V) of 0.14.
Burst Advocate for this burst is M. H. Siegel (siegel AT astro.psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 01:03:15 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
POINT_ROLL:      98.705d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3309.08 SOD {00:55:09.08} UT,   285.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.480
N_STARS:         94
X_OFFSET:        589 [pixels]
Y_OFFSET:        568 [pixels]
X_MAX:           1548 [pixels]
Y_MAX:           1527 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00507185000msufc0285.fits
SUN_POSTN:       221.80d {+14h 47m 13s}  -16.12d {-16d 07' 03"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.81d {+00h 03m 14s}   +5.77d {+05d 46' 05"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 01:03:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
POINT_ROLL:      98.705d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3309.08 SOD {00:55:09.08} UT,   285.1 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        1.480
N_STARS:         94
X_OFFSET:        589 [pixels]
Y_OFFSET:        568 [pixels]
X_MAX:           1548 [pixels]
Y_MAX:           1527 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00507185000msufc0285.fits
SUN_POSTN:       221.80d {+14h 47m 13s}  -16.12d {-16d 07' 03"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.81d {+00h 03m 15s}   +5.77d {+05d 46' 09"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [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:     Mon 07 Nov 11 01:04:38 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
ROLL:            98.705d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3309.08 SOD {00:55:09.08} UT,   285.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     342320116
X_OFFSET:        909 [pixels]
Y_OFFSET:        888 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1069
Y_GRB_POS:       1048
BINNING_INDEX:   1
IM_URL:          sw00507185000msuni0293.fits
SUN_POSTN:       221.80d {+14h 47m 13s}  -16.12d {-16d 07' 04"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.82d {+00h 03m 17s}   +5.77d {+05d 46' 20"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [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:     Mon 07 Nov 11 01:04:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
ROLL:            98.705d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3309.08 SOD {00:55:09.08} UT,   285.1 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     342320116
X_OFFSET:        909 [pixels]
Y_OFFSET:        888 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1069
Y_GRB_POS:       1048
BINNING_INDEX:   1
IM_URL:          sw00507185000msuni0293.fits
SUN_POSTN:       221.80d {+14h 47m 13s}  -16.12d {-16d 07' 04"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.82d {+00h 03m 17s}   +5.77d {+05d 46' 22"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.03,-74.55 [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:     Mon 07 Nov 11 01:07:29 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     507185,   Seg_Num: 0
GRB_RA:          129.4775d {+08h 37m 54.59s} (J2000),
                 129.5120d {+08h 38m 02.88s} (current),
                 129.3301d {+08h 37m 19.22s} (1950)
GRB_DEC:         -66.5199d {-66d 31' 11.6"} (J2000),
                 -66.5619d {-66d 33' 42.6"} (current),
                 -66.3432d {-66d 20' 35.4"} (1950)
GRB_ERROR:       2.2 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3129.00 SOD {00:52:09.00} UT,   105.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       221.81d {+14h 47m 13s}  -16.12d {-16d 07' 06"}
SUN_DIST:         76.15 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.84d {+00h 03m 22s}   +5.78d {+05d 46' 52"}
MOON_DIST:       109.86 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.29,-15.03 [deg] galactic lon,lat of the burst
ECL_COORDS:      198.08,-74.55 [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 0.58% < P(seren) < 1.1%.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 01:09:09 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
POINT_ROLL:      98.706d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3886.10 SOD {01:04:46.10} UT,   862.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.896
N_STARS:         190
X_OFFSET:        349 [pixels]
Y_OFFSET:        328 [pixels]
X_MAX:           1788 [pixels]
Y_MAX:           1767 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00507185000msufc0862.fits
SUN_POSTN:       221.81d {+14h 47m 14s}  -16.12d {-16d 07' 07"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.85d {+00h 03m 25s}   +5.79d {+05d 47' 10"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.02,-74.55 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 01:09:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
POINT_ROLL:      98.706d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3886.10 SOD {01:04:46.10} UT,   862.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        4.896
N_STARS:         190
X_OFFSET:        349 [pixels]
Y_OFFSET:        328 [pixels]
X_MAX:           1788 [pixels]
Y_MAX:           1767 [pixels]
DET_THRESH:      19
PHOTO_THRESH:    11
SL_URL:          sw00507185000msufc0862.fits
SUN_POSTN:       221.81d {+14h 47m 14s}  -16.12d {-16d 07' 08"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.86d {+00h 03m 26s}   +5.79d {+05d 47' 15"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.02,-74.55 [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:     Mon 07 Nov 11 01:10:35 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
ROLL:            98.706d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3886.10 SOD {01:04:46.10} UT,   862.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     342320693
X_OFFSET:        908 [pixels]
Y_OFFSET:        887 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1068
Y_GRB_POS:       1047
BINNING_INDEX:   1
IM_URL:          sw00507185000msuni0870.fits
SUN_POSTN:       221.81d {+14h 47m 14s}  -16.12d {-16d 07' 08"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.87d {+00h 03m 28s}   +5.79d {+05d 47' 26"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.02,-74.55 [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:     Mon 07 Nov 11 01:10:53 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     507185,   Seg_Num: 0
POINT_RA:        129.447d {+08h 37m 47s} (J2000)
POINT_DEC:       -66.510d {-66d 30' 33"} (J2000)
ROLL:            98.706d
IMG_START_DATE:  15872 TJD;   311 DOY;   11/11/07
IMG_START_TIME:  3886.10 SOD {01:04:46.10} UT,   862.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     342320693
X_OFFSET:        908 [pixels]
Y_OFFSET:        887 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1068
Y_GRB_POS:       1047
BINNING_INDEX:   1
IM_URL:          sw00507185000msuni0870.fits
SUN_POSTN:       221.81d {+14h 47m 14s}  -16.12d {-16d 07' 08"}
SUN_DIST:         76.16 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        0.87d {+00h 03m 28s}   +5.79d {+05d 47' 29"}
MOON_DIST:       109.85 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.27,-15.04 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      198.02,-74.55 [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/FERMI NOTICE
NOTICE_DATE:     Mon 07 Nov 11 01:34:44 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     342319827     
GRB_RA:          136.620d {+09h 06m 29s} (J2000),
                 136.688d {+09h 06m 45s} (current),
                 136.331d {+09h 05m 19s} (1950)
GRB_DEC:         -61.500d {-61d 29' 59"} (J2000),
                 -61.548d {-61d 32' 51"} (current),
                 -61.298d {-61d 17' 52"} (1950)
GRB_ERROR:       13.28 [deg radius, statistical only]
GRB_DATE:        15872 TJD;   311 DOY;   11/11/07
GRB_TIME:        3025.48 SOD {00:50:25.48} UT
GRB_PHI:         257.99 [deg]  
GRB_THETA:       118.01 [deg]  
E_RANGE:         50.000 - 300.000 [keV]
LOC_ALGORITHM:   414 (Gnd S/W Version number)
SUN_POSTN:       221.82d {+14h 47m 18s}  -16.12d {-16d 07' 26"}
SUN_DIST:         73.56 [deg]   Sun_angle= 5.7 [hr] (West of Sun)
MOON_POSTN:        1.05d {+00h 04m 12s}   +5.86d {+05d 51' 52"}
MOON_DIST:       115.38 [deg]  
MOON_ILLUM:      88 [%]        
GAL_COORDS:      279.22, -9.48 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      188.02,-69.50 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Final Position.
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN Circular #12535
A. LaCluyze, J. Haislip, K. Ivarsen, D. Reichart, M. Nysewander, J. Moore, A. Trotter, R. Egger, A. Foster, A. Oza, T. Cromartie, E. Speckhard, and J. A. Crain report:
Skynet observed the field of GRB 111107A, Swift trigger 507185, with the PROMPT telescopes located at CTIO in Chile. We detect a fading optical source within the error circle. Preliminary calibration to USNO catalog stars yields the follow initial detections:
```
Tmean(min) Tmean(day) Tel      Exp     Filt Mag     S/N
14.75 m    0.01024    Prompt4  5 x 80 s  R  19.467  2.892
15.22 m    0.01057    Prompt5  4 x 80 s  I  18.444  4.363
```
Further observations are ongoing. This message may be cited.

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 07 Nov 11 04:30:10 UT
NOTICE_TYPE:     Swift-BAT Slew GRB Position
ID_NUM:          672
GRB_RA:          129.610d {+08h 38m 26s} (J2000),
                 129.645d {+08h 38m 35s} (current),
                 129.462d {+08h 37m 51s} (1950)
GRB_DEC:         -66.540d {-66d 32' 23"} (J2000),
                 -66.582d {-66d 34' 54"} (current),
                 -66.363d {-66d 21' 45"} (1950)
GRB_ERROR:       4.23 [arcmin radius, statistical only]
GRB_INTEN:       331908 [cnts]    Image_Peak=0 [image_cnts]
TRIGGER_DUR:     40.400 [sec] 
TRIGGER_INDEX:   9     Criteria: (S(15-50) OR H(50-150)) > 4.0 sigma  AND  B(15-150) > 6.0 sigma
ENERGY_RANGE:    15-150 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        15872 TJD;   311 DOY;   11/11/07
GRB_TIME:        3035.88 SOD {00:50:35.88} UT
SOLN_STATUS:     0x4011
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    5.90 [sigma]
SUN_POSTN:       221.95d {+14h 47m 47s}  -16.16d {-16d 09' 36"}
SUN_DIST:         76.11 [deg]   Sun_angle= 6.2 [hr] (West of Sun)
MOON_POSTN:        2.40d {+00h 09m 35s}   +6.40d {+06d 23' 57"}
MOON_DIST:       109.96 [deg]
MOON_ILLUM:      88 [%]
GAL_COORDS:      281.34,-15.00 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      198.21,-74.50 [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 probably a GRB.  
COMMENTS:        High confidence of reality (silver-plated).  
COMMENTS:        This Notice was ground-processed from flight-data.  
COMMENTS:

GCN Circular #12536
T. Kruehler (DARK/NBI), A. Nicuesa Guelbenzu, S. Klose (both TLS Tautenburg) and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of the Swift GRB 111107A (Siegel et al., GCN 12534) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPI/ESO telescope at La Silla Observatory (Chile).
Observations started on November 7, 2011, 03:28 UT as soon as the field of GRB 111107A rose above the pointing constraints of the telescope. This is roughly 2.6 hrs after the trigger.
We detect the afterglow candidate reported by Siegel et al. (GCN 12534) and LaCluyze et al. (GCN 12535). Based on an exposure time of 460 s, we estimate a preliminary r'-band magnitude (in the AB system) of:
r' = 21.3 +/- 0.1
at a midtime of 03:41 UT. The r' band magnitude has been calibrated against the GROND zeropoint.
GCN Circular #12537
R. Chornock, E. Berger (Harvard), and D. Fox (Penn St.) report:
We obtained spectroscopy of the optical afterglow of GRB 111107A (Siegel et al., GCN 12534; LaCluyze et al., GCN 12535; Kruehler et al., GCN 12536) using GMOS-South on the Gemini-South 8-m telescope. Observations began at 05:05 UT (4.2 hrs after the BAT trigger). Inspection of the first two exposures (range 4160-8140 Angstroms) reveals a damped Lyman-alpha absorber as well as narrow absorption lines of C IV, Al II, and C II at a common redshift of 2.893.
GCN Circular #12538
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 1642 s of XRT Photon Counting mode data and 2 UVOT images for GRB 111107A, 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 = 129.47666, -66.51988 which is equivalent to:
```
RA (J2000): 08h 37m 54.40s
Dec (J2000): -66d 31' 11.6"
```
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 #12539
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), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. H. Siegel (PSU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 111107A (trigger #507185) (Siegel, et al., GCN Circ. 12534). The BAT ground-calculated position is RA, Dec = 129.487, -66.520 deg, which is
```
   RA(J2000)  =  08h 37m 56.8s 
   Dec(J2000) = -66d 31' 12.0" 
```
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 71%.
The mask-weighted light curve shows a FRED peak starting at ~T-1 sec, peaking at ~T+2 sec, and returning to baseline at ~T+55 sec. At the 2-sigma level, there is a possible peak from T+130 to T+180 sec. There is no hint of a peak in the T+250 to T+400 sec range corresponding to the flare seen in the XRT afterglow lightcurve. T90 (15-350 keV) is 26.6 +- 6.6 sec (estimated error including systematics).
The time-averaged spectrum from T-0.06 to T+32.83 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.49 +- 0.14. The fluence in the 15-150 keV band is 8.8 +- 0.8 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+2.16 sec in the 15-150 keV band is 1.2 +- 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/507185/BA/
GCN Circular #12540
N. P. M. Kuin (MSSL-UCL) and M. H. Siegel (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111107A 73 s after the BAT trigger (Siegel et al., GCN Circ. 12534).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white               73          223          147         19.45 +/- 0.10
v                  615         1755          136        >18.7
b                  540         1681          117        >20.0
u                  285         1656          343        >19.9
w1                 664         1631          117        >19.2
m2                 639         5231          299        >19.7
w2                 590         1730          136        >20.0
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.14 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #12541
A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), R. J. Cumming, A. O. Henrik Olofsson, P. Bergman (OSO), Felipe McAuliffe, M. Martinez (ESO) and A. Lundgren (ESO/ALMA) report on behalf of a larger collaboration:
We have observed the field of GRB 111107A (Siegel et al., GCN 12534) using LABOCA/APEX at Chajnantor (Chile) in the 345 GHz band. The observation consisted of 241 min on source, observed between 3:41 and 10:08 UT (between 2.85 and 9.3 hr after the burst) using the imaging mode. Weather conditions were good, with precipitable water vapour ranging between 0.5 and 0.8. In a preliminary reduction we do not detect any source at the position of the afterglow. The r.m.s. of the image is ~6 mJy, giving a 3-sigma detection limit of 18 mJy.
GCN Circular #12542
P. D'Avanzo (INAF-OAB), S. D. Vergani (INAF-OAB), H. Flores (GEPI/Obs. de Paris), D. Malesani, D. Watson, A. J. Levan (Univ. Warwick), J. P. U. Fynbo (DARK/NBI), report on behalf of a larger collaboration:
We observed the optical afterglow of GRB 111107A (Siegel et al., GCN 12534; LaCluyze et al., GCN 12535; Kruehler et al., GCN 12536; Kuin et al., GCN 12540), using the X-shooter spectrograph mounted on the ESO-VLT. Observations started on 2011 November 7.254 UT (5.26 hr after the GRB), with a total exposure time of 1.3 hr, covering the wavelength range 3000-25000 AA.
In the spectra (reduced with archival calibration files) we detect several absorption lines, like Ly-alpha, CIV, FeII and MgII, and the correspondent Lyman limit absorption, at a redshift consistent with that reported by Chornock et al. (GCN 12537).
We also note the presence of a strong intervening Mg II system at z = 1.998.
We acknowledge excellent support from the observing staff in Paranal, in particular Valentin Ivanov, Petr Kabath, Jonathan Smoker, Claudia Cid, Sergio Vera, Christophe Martayan and Roger Wesson.
GCN Circular #12543
Bin-Bin Zhang (PSU) reports on behalf of the Swift-XRT team:
We have analysed 12 ks of XRT data for GRB 111107A (Siegel et al. GCN Circ. 12534), from 55 s to 30.6 ks after the BAT trigger. The data comprise 42 s in Windowed Timing (WT) mode (the first 7 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 Osborne et al. (GCN. Circ 12538).
The late-time light curve (from T0+5.1 ks) can be modelled with a power-law decay with a decay index of alpha=1.12 (+0.29, -0.27).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.15 (+0.12, -0.16). The best-fitting absorption column is 3.5 (+6.0, -3.5) x 10^21 cm^-2, at a redshift of 2.893, in addition to the Galactic value of 8.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.3 x 10^-11 (4.5 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Galactic foreground: 8.9 x 10^20 cm^-2
Intrinsic column:    3.5 (+6.0, -3.5) x 10^21 cm^-2 at z=2.893
Photon index:	     2.15 (+0.12, -0.16)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00507185.
This circular is an official product of the Swift-XRT team.
GCN Circular #12544
A. LaCluyze, J. Haislip, K. Ivarsen, D. Reichart, M. Nysewander, J. Moore, A. Trotter, R. Egger, A. Foster, A. Oza, T. Cromartie, E. Speckhard, and J. A. Crain report:
Skynet continued observing the field of GRB 111107A (Swift trigger 507185, Siegel et al., GCN 12534; LaCluyze et al., GCN 12535; Kruehler et al., GCN 12536; Kuin et al., GCN 12540) with the PROMPT telescopes located at CTIO in Chile in B, R, and I. We detect the fading optical counterpart in R and I, with limits in B. The fading is consistent with a power-law index of ~-0.7.
Preliminary light curve can be found at the following link: http://skynet.unc.edu/grb/grb111107a.png
Prompt4, R-band, calibrated to 12 USNO B1.0 stars
```
T(mean) Tmean(days) Exps     Mag     1-sig MagErr
14.75 m  0.01024  5 x 80 s   19.467  +0.427/-0.311
30.93 m  0.02148  13 x 80 s  19.883  +0.360/-0.273
61.87 m  0.04296  24 x 80 s  20.319  +0.337/-0.259
118.57 m 0.08234  43 x 80 s  20.818  +0.404/-0.298
3.815 h  0.15895  94 x 80 s  21.206  +0.243/-0.200
6.619 h  0.27579  102 x 80 s 21.837  +0.357/-0.271
```
Prompt5, I-band, calibrated to 15 USNO B1.0 stars
```
T(mean) Tmean(days) Exps     Mag     1-sig MagErr
15.22 m  0.01057  4 x 80 s   18.443  +0.274/-0.220
24.77 m  0.01720  5 x 80 s   18.520  +0.263/-0.212
49.60 m  0.03444  24 x 80 s  19.474  +0.262/-0.212
112.45 m 0.07809  49 x 80 s  19.898  +0.300/-0.237
3.139 h  0.13081  43 x 80 s  20.297  +0.390/-0.291
6.189 h  0.25788  130 x 80 s 20.650  +0.273/-0.220
```
Prompt3, B-band, calibrated to 14 USNO B1.0 stars
```
T(mean) Tmean(days) Exps   3-SigLimMag
88.62 m  0.06154  47 x 80 s  20.3
4.738 h  0.19743  159 x 80 s 21.6
```
Further observations are planned. This message may be cited.
GCN Circular #12545
V. Pelassa (UAH) reports on behalf of the Fermi GBM Team:
"At 00:50:25.48 UT on 07 November 2011, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 111107A (trigger 342319827 / 111107035) which was also detected by the Swift/BAT (Siegel et al. 2011, GCN 12534). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 119 degrees.
The GBM light curve consists of a FRED-like pulse with a duration (T90) of about 12 s (50-300 keV). The time-averaged spectrum from T0-1.024 s to T0+11.264 s is well fit by a power law function with an exponential high-energy cutoff. The power law index is -1.38 +/- 0.21 and the cutoff energy, parameterized as Epeak, is 108 +/- 32 keV (Castor statistics 318.55 for 365 d.o.f.).
The event fluence (10-1000 keV) in this time interval is (1.392 +/- 0.197)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+0.96 s in the 10-1000 keV band is 2.6 +/- 0.3 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #12558
FROM: Paul Hancock at U of Sydney
Paul J. Hancock, Tara Murphy (U of Sydney):
We observed GRB111107A (GCN12534) with the Australian Telescope Compact Array (ATCA) on Nov 07 at 12 UT (~11 hours after the GRB trigger). At 9GHz there is no sign of any emission from the GRB above a 3=F3 limit of 200uJy. At 5.5GHz there appears to be a 4=F3 source at 300+/-40uJy at the UVOT location of the GRB (GCN 12538). In both cases the measurement of the possible GRB flux is complicated by the presence of one or more confusing radio sources in the field of view. Further observations are planned. We thank the observatory staff for scheduling and supporting these observations.
GCN Circular #12564
Paul J. Hancock, Tara Murphy (U of Sydney)
Following the possible detection reported in GCN12558 we again observed GRB111107A (GCN12534) with the Australian Telescope Compact Array (ATCA) on Nov 14 from 16:54UT to 18:43UT (~7.5 days after the GRB trigger). We detect no emission from the GRB with a 3sigma limit of 180 uJy and 150 uJy at 5.5GHz and 9 GHz respectively. Given that the 5.5 GHz radio luminosity of the GRB is expected to increase over at least the first 7.5 days post burst, we conclude that the possible 4sigma detection reported in GCN12558 is a result of the nearby source SUMSS J083735-663107. No further observations are planned. We thank the observatory staff for scheduling and supporting these observations.
GCN Report 351.1
GCN_Report 351.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_351_1.pdf by M.H. Siegel at PSU titled: "Final Swift Observations of GRB 111107A"

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Jochen Greiner, last update: 18-Nov-2011 [Disclaimer]