Gamma-ray Burst 121125A

(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 25 Nov 12 08:32:43 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.520d {+15h 14m 05s} (J2000),
                 228.608d {+15h 14m 26s} (current),
                 228.182d {+15h 12m 44s} (1950)
GRB_DEC:         +55.322d {+55d 19' 18"} (J2000),
                 +55.274d {+55d 16' 27"} (current),
                 +55.507d {+55d 30' 25"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1988 [cnts]    Image_Peak=115 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       24351 [cnts]
BKG_TIME:        30734.08 SOD {08:32:14.08} UT
BKG_DUR:         8 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30747.27 SOD {08:32:27.27} UT
GRB_PHI:         -50.03 [deg]
GRB_THETA:        22.96 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.48 [sigma]
IMAGE_SIGNIF:    7.04 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  -3  +0  +0 -22  +0 
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         76.91 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.23d {+01h 40m 56s}  +13.16d {+13d 09' 38"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.45, 51.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      189.63, 67.53 [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 = 109.43,19.29 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:33:10 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     375525152
GRB_RA:          225.730d {+15h 02m 55s} (J2000),
                 225.850d {+15h 03m 24s} (current),
                 225.265d {+15h 01m 04s} (1950)
GRB_DEC:         +41.340d {+41d 20' 24"} (J2000),
                 +41.290d {+41d 17' 24"} (current),
                 +41.535d {+41d 32' 07"} (1950)
GRB_ERROR:       16.61 [deg radius, statistical only]
DATA_SIGNIF:     8.70 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30749.63 SOD {08:32:29.63} UT
GRB_PHI:         317.00 [deg]
GRB_THETA:        48.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         63.80 [deg]   Sun_angle= 1.0 [hr] (West of Sun)
MOON_POSTN:       25.24d {+01h 40m 57s}  +13.16d {+13d 09' 42"}
MOON_DIST:       122.31 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       69.32, 59.59 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      203.74, 55.07 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=539563).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:32:58 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      46
TRIGGER_NUM:     375525152
GRB_RA:          203.667d {+13h 34m 40s} (J2000),
                 203.805d {+13h 35m 13s} (current),
                 203.130d {+13h 32m 31s} (1950)
GRB_DEC:         +42.983d {+42d 58' 60"} (J2000),
                 +42.918d {+42d 55' 03"} (current),
                 +43.239d {+43d 14' 20"} (1950)
GRB_ERROR:       19.60 [deg radius, statistical plus systematic]
GRB_INTEN:       73 [cnts/sec]
DATA_SIGNIF:     5.90 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30749.63 SOD {08:32:29.63} UT
GRB_PHI:         298.00 [deg]
GRB_THETA:        55.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.98
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   1%  Generic Transient
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         72.57 [deg]   Sun_angle= 2.5 [hr] (West of Sun)
MOON_POSTN:       25.24d {+01h 40m 57s}  +13.16d {+13d 09' 40"}
MOON_DIST:       123.91 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       96.76, 71.88 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      179.85, 47.93 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=539563).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:33:32 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      86
TRIGGER_NUM:     375525152
GRB_RA:          217.200d {+14h 28m 48s} (J2000),
                 217.300d {+14h 29m 12s} (current),
                 216.814d {+14h 27m 15s} (1950)
GRB_DEC:         +56.550d {+56d 32' 60"} (J2000),
                 +56.493d {+56d 29' 34"} (current),
                 +56.772d {+56d 46' 20"} (1950)
GRB_ERROR:       9.25 [deg radius, statistical plus systematic]
GRB_INTEN:       160 [cnts/sec]
DATA_SIGNIF:     13.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30749.63 SOD {08:32:29.63} UT
GRB_PHI:         297.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.79
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         79.98 [deg]   Sun_angle= 1.6 [hr] (West of Sun)
MOON_POSTN:       25.24d {+01h 40m 58s}  +13.16d {+13d 09' 45"}
MOON_DIST:       109.62 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       99.07, 55.83 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      176.59, 63.91 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=539563).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:33:36 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      85
TRIGGER_NUM:     375525152
GRB_RA:          229.680d {+15h 18m 43s} (J2000),
                 229.779d {+15h 19m 07s} (current),
                 229.296d {+15h 17m 11s} (1950)
GRB_DEC:         +50.380d {+50d 22' 48"} (J2000),
                 +50.334d {+50d 20' 01"} (current),
                 +50.561d {+50d 33' 39"} (1950)
GRB_ERROR:       5.73 [deg radius, statistical only]
DATA_SIGNIF:     16.10 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30749.63 SOD {08:32:29.63} UT
GRB_PHI:         312.00 [deg]
GRB_THETA:        40.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         71.93 [deg]   Sun_angle= 0.8 [hr] (West of Sun)
MOON_POSTN:       25.24d {+01h 40m 58s}  +13.16d {+13d 09' 45"}
MOON_DIST:       112.96 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       82.77, 53.66 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      198.70, 64.18 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=539563).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:33:41 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      88
TRIGGER_NUM:     375525152
GRB_RA:          234.960d {+15h 39m 50s} (J2000),
                 235.039d {+15h 40m 09s} (current),
                 234.654d {+15h 38m 37s} (1950)
GRB_DEC:         +55.700d {+55d 42' 00"} (J2000),
                 +55.659d {+55d 39' 32"} (current),
                 +55.860d {+55d 51' 38"} (1950)
GRB_ERROR:       4.08 [deg radius, statistical only]
DATA_SIGNIF:     17.10 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30749.63 SOD {08:32:29.63} UT
GRB_PHI:         310.00 [deg]
GRB_THETA:        34.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         76.70 [deg]   Sun_angle= 0.4 [hr] (West of Sun)
MOON_POSTN:       25.24d {+01h 40m 58s}  +13.16d {+13d 09' 46"}
MOON_DIST:       106.78 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       88.18, 48.49 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      196.32, 70.30 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=539563).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:33:47 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      89
TRIGGER_NUM:     375525152
GRB_RA:          235.970d {+15h 43m 53s} (J2000),
                 236.044d {+15h 44m 11s} (current),
                 235.684d {+15h 42m 44s} (1950)
GRB_DEC:         +56.890d {+56d 53' 24"} (J2000),
                 +56.850d {+56d 50' 59"} (current),
                 +57.046d {+57d 02' 47"} (1950)
GRB_ERROR:       2.52 [deg radius, statistical only]
DATA_SIGNIF:     19.20 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30749.63 SOD {08:32:29.63} UT
GRB_PHI:         309.00 [deg]
GRB_THETA:        33.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4143 (Gnd S/W Version number)
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 51"}
SUN_DIST:         77.83 [deg]   Sun_angle= 0.4 [hr] (West of Sun)
MOON_POSTN:       25.24d {+01h 40m 58s}  +13.16d {+13d 09' 47"}
MOON_DIST:       105.47 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       89.41, 47.46 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      195.04, 71.55 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        In the LAT Field-of-view.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=539563).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:34:11 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.5272d {+15h 14m 06.52s} (J2000),
                 228.6148d {+15h 14m 27.54s} (current),
                 228.1883d {+15h 12m 45.19s} (1950)
GRB_DEC:         +55.3130d {+55d 18' 46.8"} (J2000),
                 +55.2655d {+55d 15' 55.7"} (current),
                 +55.4980d {+55d 29' 52.7"} (1950)
GRB_ERROR:       4.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       4.27e-09 [erg/cm2/sec]
GRB_SIGNIF:      11.26 [sigma]
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30814.14 SOD {08:33:34.14} UT,   66.9 [sec] since BAT Trigger Time
TAM[0-3]:        327.62 237.22 261.36 243.61
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 52"}
SUN_DIST:         76.90 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.25d {+01h 40m 59s}  +13.16d {+13d 09' 50"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.44, 51.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      189.66, 67.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 0.58 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:34:28 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.5272d {+15h 14m 06.5s} (J2000),
                 228.6148d {+15h 14m 27.5s} (current),
                 228.1883d {+15h 12m 45.1s} (1950)
GRB_DEC:         +55.3130d {+55d 18' 46.8"} (J2000),
                 +55.2655d {+55d 15' 55.7"} (current),
                 +55.4980d {+55d 29' 52.7"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       127 [cnts]
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30814.14 SOD {08:33:34.14} UT,   66.9 [sec] since BAT Trigger Time
CENTROID_X:      274.12,  raw= 274  [pixels]
CENTROID_Y:      305.23,  raw= 305  [pixels]
ROLL:            167.63 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   17.05
GRB_POS_XRT_Z:   -69.72
IMAGE_URL:       sw00539563000msxps_rw.img
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 52"}
SUN_DIST:         76.90 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.25d {+01h 41m 00s}  +13.16d {+13d 09' 53"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.44, 51.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      189.66, 67.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:34:19 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.5272d {+15h 14m 06.5s} (J2000),
                 228.6148d {+15h 14m 27.5s} (current),
                 228.1883d {+15h 12m 45.1s} (1950)
GRB_DEC:         +55.3130d {+55d 18' 46.8"} (J2000),
                 +55.2655d {+55d 15' 55.7"} (current),
                 +55.4980d {+55d 29' 52.7"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       127 [cnts]
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30814.14 SOD {08:33:34.14} UT,   66.9 [sec] since BAT Trigger Time
CENTROID_X:      274.12,  raw= 274  [pixels]
CENTROID_Y:      305.23,  raw= 305  [pixels]
ROLL:            167.63 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   17.05
GRB_POS_XRT_Z:   -69.72
IMAGE_URL:       sw00539563000msxps_rw.img
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 52"}
SUN_DIST:         76.90 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.25d {+01h 40m 59s}  +13.16d {+13d 09' 51"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.44, 51.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      189.66, 67.52 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:36:25 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.520d {+15h 14m 05s} (J2000),
                 228.608d {+15h 14m 26s} (current),
                 228.182d {+15h 12m 44s} (1950)
GRB_DEC:         +55.322d {+55d 19' 18"} (J2000),
                 +55.274d {+55d 16' 27"} (current),
                 +55.507d {+55d 30' 25"} (1950)
GRB_DATE:        16256 TJD;   330 DOY;   12/11/25
GRB_TIME:        30747.27 SOD {08:32:27.27} UT
TRIGGER_INDEX:   124
GRB_PHI:         -50.03 [deg]
GRB_THETA:        22.96 [deg]
DELTA_TIME:      -38.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     10.48 [sigma]
IMAGE_SIGNIF:    7.04 [sigma]
LC_URL:          sw00539563000msb.lc
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 53"}
SUN_DIST:         76.91 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.26d {+01h 41m 04s}  +13.17d {+13d 10' 09"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.45, 51.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      189.63, 67.53 [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 = 109.43,19.29 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:36:44 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.512d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.330d {+55d 19' 49"} (J2000)
POINT_ROLL:      167.632d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30822.63 SOD {08:33:42.63} UT,   75.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.100
N_STARS:         26
X_OFFSET:        544 [pixels]
Y_OFFSET:        496 [pixels]
X_MAX:           1503 [pixels]
Y_MAX:           1455 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00539563000msufc0075.fits
SUN_POSTN:       241.46d {+16h 05m 50s}  -20.85d {-20d 50' 53"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.27d {+01h 41m 04s}  +13.17d {+13d 10' 12"}
MOON_DIST:       108.78 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:37:09 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.512d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.330d {+55d 19' 49"} (J2000)
POINT_ROLL:      167.632d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30822.63 SOD {08:33:42.63} UT,   75.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.100
N_STARS:         26
X_OFFSET:        544 [pixels]
Y_OFFSET:        496 [pixels]
X_MAX:           1503 [pixels]
Y_MAX:           1455 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00539563000msufc0075.fits
SUN_POSTN:       241.46d {+16h 05m 51s}  -20.85d {-20d 50' 53"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.27d {+01h 41m 05s}  +13.17d {+13d 10' 15"}
MOON_DIST:       108.78 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [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 25 Nov 12 08:38:03 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.512d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.330d {+55d 19' 49"} (J2000)
ROLL:            167.632d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30822.63 SOD {08:33:42.63} UT,   75.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     375525232
X_OFFSET:        917 [pixels]
Y_OFFSET:        778 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1077
Y_GRB_POS:       938
BINNING_INDEX:   1
IM_URL:          sw00539563000msuni0085.fits
SUN_POSTN:       241.46d {+16h 05m 51s}  -20.85d {-20d 50' 53"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.28d {+01h 41m 07s}  +13.17d {+13d 10' 23"}
MOON_DIST:       108.78 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [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 25 Nov 12 08:38:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.512d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.330d {+55d 19' 49"} (J2000)
ROLL:            167.632d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30822.63 SOD {08:33:42.63} UT,   75.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     375525232
X_OFFSET:        917 [pixels]
Y_OFFSET:        778 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1077
Y_GRB_POS:       938
BINNING_INDEX:   1
IM_URL:          sw00539563000msuni0085.fits
SUN_POSTN:       241.46d {+16h 05m 51s}  -20.85d {-20d 50' 54"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.28d {+01h 41m 07s}  +13.17d {+13d 10' 25"}
MOON_DIST:       108.78 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [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 25 Nov 12 08:39:52 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.5272d {+15h 14m 06.52s} (J2000),
                 228.6148d {+15h 14m 27.54s} (current),
                 228.1883d {+15h 12m 45.20s} (1950)
GRB_DEC:         +55.3133d {+55d 18' 47.8"} (J2000),
                 +55.2658d {+55d 15' 56.7"} (current),
                 +55.4983d {+55d 29' 53.8"} (1950)
GRB_ERROR:       0.7 [arcsec radius, statistical only]
GRB_MAG:         16.19 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30822.00 SOD {08:33:42.00} UT,   74.7 [sec] since BAT Trigger Time
SUN_POSTN:       241.46d {+16h 05m 51s}  -20.85d {-20d 50' 54"}
SUN_DIST:         76.90 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.29d {+01h 41m 10s}  +13.18d {+13d 10' 38"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.44, 51.85 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      189.66, 67.52 [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 0.7 arcsec from the XRT position.  
COMMENTS:        Result based on Genie data.  
COMMENTS:        Notice generated automatically.

GCN Circular #13993
B. N. Barlow (PSU), S. D. Barthelmy (GSFC), D. Grupe (PSU), E. A. Helder (PSU) and C. J. Mountford (U Leicester) report on behalf of the Swift Team:
At 08:32:27 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 121125A (trigger=539563). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 228.520, +55.322 which is
```
   RA(J2000) = 15h 14m 05s
   Dec(J2000) = +55d 19' 18"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multiple-peaked structure with a duration of about 70 sec. The peak count rate was ~4600 counts/sec (15-350 keV), at ~34 sec after the trigger.
The XRT began observing the field at 08:33:34.1 UT, 66.8 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 228.52496, 55.31330 which is equivalent to:
```
   RA(J2000)  = 15h 14m 05.99s
   Dec(J2000) = +55d 18' 47.9"
```
with an uncertainty of 4.1 arcseconds (radius, 90% containment). This location is 32 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. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.27 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.7 (+2.20/-1.89) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 4.27e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 75 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at RA(J2000) = 15:14:06.54 = 228.52724 DEC(J2000) = +55:18:48.0 = 55.31332 with a 90%-confidence error radius of about 0.74 arc sec. This position is 1.2 arc sec. from the center of the XRT error circle. The estimated magnitude is 16.19 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.01.
Burst Advocate for this burst is B. N. Barlow (bnb2 AT 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:     Sun 25 Nov 12 08:44:06 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.513d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.333d {+55d 19' 58"} (J2000)
POINT_ROLL:      167.634d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  31034.81 SOD {08:37:14.81} UT,   287.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.324
N_STARS:         13
X_OFFSET:        597 [pixels]
Y_OFFSET:        458 [pixels]
X_MAX:           1556 [pixels]
Y_MAX:           1417 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00539563000msufc0287.fits
SUN_POSTN:       241.47d {+16h 05m 52s}  -20.85d {-20d 50' 56"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.33d {+01h 41m 19s}  +13.19d {+13d 11' 14"}
MOON_DIST:       108.77 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 25 Nov 12 08:44:23 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.513d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.333d {+55d 19' 58"} (J2000)
POINT_ROLL:      167.634d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  31034.81 SOD {08:37:14.81} UT,   287.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.324
N_STARS:         13
X_OFFSET:        597 [pixels]
Y_OFFSET:        458 [pixels]
X_MAX:           1556 [pixels]
Y_MAX:           1417 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    2
SL_URL:          sw00539563000msufc0287.fits
SUN_POSTN:       241.47d {+16h 05m 52s}  -20.85d {-20d 50' 56"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.33d {+01h 41m 19s}  +13.19d {+13d 11' 16"}
MOON_DIST:       108.77 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [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 25 Nov 12 08:44:44 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     539563,   Seg_Num: 0
GRB_RA:          228.5281d {+15h 14m 06.74s} (J2000),
                 228.6156d {+15h 14m 27.75s} (current),
                 228.1892d {+15h 12m 45.41s} (1950)
GRB_DEC:         +55.3136d {+55d 18' 48.9"} (J2000),
                 +55.2661d {+55d 15' 57.8"} (current),
                 +55.4986d {+55d 29' 54.9"} (1950)
GRB_ERROR:       2.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  30962.00 SOD {08:36:02.00} UT,   214.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       241.47d {+16h 05m 52s}  -20.85d {-20d 50' 57"}
SUN_DIST:         76.90 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.33d {+01h 41m 20s}  +13.19d {+13d 11' 19"}
MOON_DIST:       108.79 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.44, 51.85 [deg] galactic lon,lat of the burst
ECL_COORDS:      189.66, 67.52 [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 25 Nov 12 08:45:31 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.513d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.333d {+55d 19' 58"} (J2000)
ROLL:            167.634d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  31034.81 SOD {08:37:14.81} UT,   287.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     375525444
X_OFFSET:        917 [pixels]
Y_OFFSET:        778 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1077
Y_GRB_POS:       938
BINNING_INDEX:   1
IM_URL:          sw00539563000msuni0297.fits
SUN_POSTN:       241.47d {+16h 05m 52s}  -20.85d {-20d 50' 57"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.34d {+01h 41m 21s}  +13.19d {+13d 11' 26"}
MOON_DIST:       108.77 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [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 25 Nov 12 08:45:42 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     539563,   Seg_Num: 0
POINT_RA:        228.513d {+15h 14m 03s} (J2000)
POINT_DEC:       +55.333d {+55d 19' 58"} (J2000)
ROLL:            167.634d
IMG_START_DATE:  16256 TJD;   330 DOY;   12/11/25
IMG_START_TIME:  31034.81 SOD {08:37:14.81} UT,   287.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     375525444
X_OFFSET:        917 [pixels]
Y_OFFSET:        778 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1077
Y_GRB_POS:       938
BINNING_INDEX:   1
IM_URL:          sw00539563000msuni0297.fits
SUN_POSTN:       241.47d {+16h 05m 52s}  -20.85d {-20d 50' 57"}
SUN_DIST:         76.92 [deg]   Sun_angle= 0.9 [hr] (West of Sun)
MOON_POSTN:       25.34d {+01h 41m 22s}  +13.19d {+13d 11' 27"}
MOON_DIST:       108.77 [deg]
MOON_ILLUM:      91 [%]
GAL_COORDS:       90.47, 51.85 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      189.61, 67.53 [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 #13994
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, A.Sankovich Sternberg Astronomical Institute, Moscow State University
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB121125.36 44 sec after GRB time at 2012-11-25 08:33:11.383 UT. On our first (10s exposure) set we haven`t found optical transient within SWIFT error-box (Barlow et al., GCN Circ 13993). Unfortunately notice alert have come immodiatly after sunset when telescope prepearing calibration images.
So 5-sigma upper limit of the first images has been about 13.8 mag that is not very good. We see OT (Barlow et al., GCN Circ 13993) on UVOT position on the next images with 14.5 mag limit (UT_start = 2012-11-25 08:34:34, 127 s after trigger time, exp_time = 30s).
We note that there is 16.5 mag star 9 arcsec from UVOT OT coordinates. The observations is continuated.
The message may be cited.
GCN Circular #13995
M. Im (CEOU/SNU) and Y. Urata (NCU) on behalf of EAFON.
We observed the field of GRB 121125A (Barlow et al., GCN 13993) in B and R filters using the 1-m telescope at Mt. Lemmon observatory in Arizona, US.
The observation started at 2012-11-25 12:24:27 UT, or about 3.87 hours after the BAT alert, and continued for about 30 min. We identify an object in stacked images of both B and R at
RA=15:14:06.586, Dec=55:18:47.95 with rms error of 0.6".
This is consistent with the UVOT coordinate of the afterglow candidate reported in Barlow et al. The object has R-band magnitude of R = 19.29 +- 0.14 mag, calibrated against R2 magnitude (16.13 mag) of a USNO-B1 star at RA=15:14:07.14, Dec=+55:18:40.30. Combined with the result from Yurkov et al. (GCN 13994) and Barlow et al., our result reveals a fading behavior of the object, thus we identify the object to be the afterglow of GRB 121125A.
We thank the LOAO operator, Jae-Hyuk Yoon for performing the observation.
GCN Circular #13996
S. D. Barthelmy (GSFC), B. N. Barlow (PSU), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 121125A (trigger #539563) (Barlow, et al., GCN Circ. 12993). The BAT ground-calculated position is RA, Dec = 228.519, 55.318 deg, which is
```
   RA(J2000)  =  15h 14m 04.6s 
   Dec(J2000) = +55d 19' 03.5" 
```
with an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 80%.
The mask-weighted light curve shows two clusters of overlapping peaks that start at ~T-7 sec, peaks at ~T+37 sec, and ends at ~T+100 sec. T90 (15-350 keV) is 52.2 +- 4.6 sec (estimated error including systematics).
The time-averaged spectrum from T-6.31 to T+77.64 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.52 +- 0.06. The fluence in the 15-150 keV band is 4.7 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+36.56 sec in the 15-150 keV band is 2.9 +- 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/539563/BA/
GCN Circular #13997
Sinead McGlynn (MPE/TUM) reports on behalf of the Fermi GBM Team:
"At 08:32:29.63 UT on 25 Nov 2012, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 121125A (trigger 375525152/121125356), which was also detected by the Swift/BAT (Barthelmy et al. 2012, GCN 13996). The GBM on-ground location is consistent with the Swift/UVOT afterglow candidate position (Barlow et al. 2012, GCN 13993).
The on-ground calculated location, using the GBM trigger data, is RA = 229.30, DEC = +54.14 (J2000 degrees, equivalent to 15h 17m 12s, 54d 08' 24"), with an uncertainty of 2.22 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which is currently estimated to be 2 to 3 degrees).
The angle from the Fermi LAT boresight is 37 degrees.
The GBM light curve shows/consists of several pulses with a duration (T90) of about 50 s (50-300 keV). The time-averaged spectrum from T0-11.3 s to T0+49.1 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.38 +/- 0.06 and the cutoff energy, parameterized as Epeak, is 196 +/- 26 keV.
The event fluence (10-1000 keV) in this time interval is (9.5 +/- 0.4)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+32 s in the 10-1000 keV band is 4.2 +/- 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 #13998
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 4397 s of XRT Photon Counting mode data and 10 UVOT images for GRB 121125A, 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 = 228.52806, +55.31335 which is equivalent to:
```
RA (J2000): 15h 14m 6.73s
Dec (J2000): +55d 18' 48.1"
```
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 #13999
B. Sbarufatti (INAF-OAB/PSU), G. Stratta (ASDC), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), P.A. Evans (U. Leicester), O.M. Littlejohns (U. Leicester), J.P. Osborne (U. Leicester), P. D'Avanzo (INAF-OAB) and B.N. Barlow report on behalf of the Swift-XRT team:
We have analysed 9.6 ks of XRT data for GRB 121125A (Barlow et al. GCN Circ. 13993), from 73 s to 23.5 ks after the BAT trigger. The data comprise 196 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 13998).
The late-time light curve (from T0+4.0 ks) can be modelled with a power-law decay with a decay index of alpha=1.28 (+/-0.08).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.02 (+0.10, -0.09). The best-fitting absorption column is 1.49 (+0.23, -0.22) x 10^21 cm^-2, in excess of the Galactic value of 1.3 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.14 (+0.13, -0.12) and a best-fitting absorption column of 1.02 (+0.28, -0.26) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.4 x 10^-11 (4.6 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.02 (+0.28, -0.26) x 10^21 cm^-2
Galactic foreground: 1.3 x 10^20 cm^-2
Excess significance: 5.6 sigma
Photon index:	     2.14 (+0.13, -0.12)
```
If the light curve continues to decay with a power-law decay index of 1.28, the count rate at T+24 hours will be 0.013 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 4.2 x 10^-13 (5.7 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/00539563.
This circular is an official product of the Swift-XRT team.
GCN Circular #14002
F. E. Marshall (NASA/GSFC) and B. N. Barlow (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 121125A 75 s after the BAT trigger (Barlow et al., GCN Circ. 13993). A source consistent with the XRT position (Goad et al., GCN Circ. 13998) is detected in the initial UVOT exposures.
The refined UVOT position is:
```
    RA  (J2000) =  15:14:06.58 = 228.52740 (deg.)
    Dec (J2000) = +55:18:48.0  =  55.31332 (deg.)
```
with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white               75          225          147         16.35 +/- 0.03
v                 4693         4892          197         19.11 +/- 0.19
b                 4076         4276          197         19.31 +/- 0.13
u                  288          423          134         16.21 +/- 0.04
w1                5103         5302          197         20.06 +/- 0.32
m2                4897        11750         1082        >21.9
w2                4488         6123          393        >21.6
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #14020
A. Volnova (SAI MSU, IKI), D. Varda (ISON), E. Sinyakov (ISON), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 121125A (Barlow et al., GCN 13993) with ORI-25 telescope of ISON-Blagoveshensk observatory starting on Nov.25 (UT) 09:05:39. We took several unfiltered images. We do not detect the OT (Barlow et al., GCN 13993; Yurkov et al., GCN 13994; Im et al., GCN 13995) in any combined images. A photometry of stacked image is based on nearby USNO-B1.0 stars (R2):
T_start T0+, Filter, exposure, UL (3 sigma) (UT) mid (d) (s)
08:58:19 0.03078 none 52 x 40 15.6
GCN Report 419.1
GCN_Report 419.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_419_1.pdf by B.N. Barlow at PSU titled: "Swift Observations of GRB 121125A"

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Jochen Greiner, last update: 18-Feb-2013 [Disclaimer]