Gamma-ray Burst 120211A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 11:59:29 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     514586,   Seg_Num: 0
GRB_RA:           87.751d {+05h 51m 00s} (J2000),
                  87.875d {+05h 51m 30s} (current),
                  87.239d {+05h 48m 57s} (1950)
GRB_DEC:         -24.759d {-24d 45' 32"} (J2000),
                 -24.757d {-24d 45' 22"} (current),
                 -24.771d {-24d 46' 16"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       37742 [cnts]    Image_Peak=540 [image_cnts]
TRIGGER_DUR:     8.192 [sec] 
TRIGGER_INDEX:   477     E_range: 25-100 keV
BKG_INTEN:       279022 [cnts]
BKG_TIME:        43016.12 SOD {11:56:56.12} UT
BKG_DUR:         64 [sec]
GRB_DATE:        15968 TJD;    42 DOY;   12/02/11
GRB_TIME:        43108.08 SOD {11:58:28.08} UT
GRB_PHI:         -141.72 [deg]
GRB_THETA:        32.22 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.24 [sigma]
IMAGE_SIGNIF:    7.93 [sigma]
MERIT_PARAMS:     +1  +0  +0  +3  +2  -2  +0  +0 +37  +0 
SUN_POSTN:       324.52d {+21h 38m 05s}  -14.12d {-14d 07' 23"}
SUN_DIST:        112.46 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.93d {+12h 27m 43s}   -7.90d {-07d 53' 56"}
MOON_DIST:        94.82 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       86.94,-48.17 [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 = 103.73,15.53 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:00:43 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.767d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.755d {-24d 45' 16"} (J2000)
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43227.65 SOD {12:00:27.65} UT,   119.6 [sec] since BAT Trigger Time
COUNTS:          7    Min_needed= 20
STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
PH2_ITER:        1    Max_iter_allowed= 4
ERROR_CODE:      1
COMMENTS:        SWIFT-XRT Nack Position.  
COMMENTS:        No source found in the image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:02:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     514586,   Seg_Num: 0
GRB_RA:           87.751d {+05h 51m 00s} (J2000),
                  87.875d {+05h 51m 30s} (current),
                  87.239d {+05h 48m 57s} (1950)
GRB_DEC:         -24.759d {-24d 45' 32"} (J2000),
                 -24.757d {-24d 45' 22"} (current),
                 -24.771d {-24d 46' 16"} (1950)
GRB_DATE:        15968 TJD;    42 DOY;   12/02/11
GRB_TIME:        43108.08 SOD {11:58:28.08} UT
TRIGGER_INDEX:   477
GRB_PHI:         -141.72 [deg]
GRB_THETA:        32.22 [deg]
DELTA_TIME:      -75.00 [sec]
TRIGGER_DUR:     8.192 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     8.24 [sigma]
IMAGE_SIGNIF:    7.93 [sigma]
LC_URL:          sw00514586000msb.lc
SUN_POSTN:       324.52d {+21h 38m 05s}  -14.12d {-14d 07' 21"}
SUN_DIST:        112.46 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.95d {+12h 27m 49s}   -7.91d {-07d 54' 30"}
MOON_DIST:        94.83 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.68 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       86.94,-48.17 [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 = 103.73,15.53 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:03:28 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.767d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.754d {-24d 45' 14"} (J2000)
POINT_ROLL:      241.266d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43231.26 SOD {12:00:31.26} UT,   123.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.597
N_STARS:         90
X_OFFSET:        588 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1547 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00514586000msufc0123.fits
SUN_POSTN:       324.52d {+21h 38m 06s}  -14.12d {-14d 07' 20"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.96d {+12h 27m 52s}   -7.91d {-07d 54' 47"}
MOON_DIST:        94.83 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:04:00 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.767d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.754d {-24d 45' 14"} (J2000)
POINT_ROLL:      241.266d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43231.26 SOD {12:00:31.26} UT,   123.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.597
N_STARS:         90
X_OFFSET:        588 [pixels]
Y_OFFSET:        504 [pixels]
X_MAX:           1547 [pixels]
Y_MAX:           1463 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    5
SL_URL:          sw00514586000msufc0123.fits
SUN_POSTN:       324.52d {+21h 38m 06s}  -14.12d {-14d 07' 20"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.97d {+12h 27m 53s}   -7.92d {-07d 54' 54"}
MOON_DIST:        94.83 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [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:     Sat 11 Feb 12 12:04:49 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.767d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.754d {-24d 45' 14"} (J2000)
ROLL:            241.266d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43231.26 SOD {12:00:31.26} UT,   123.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     350654439
X_OFFSET:        907 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1067
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00514586000msuni0131.fits
SUN_POSTN:       324.52d {+21h 38m 06s}  -14.12d {-14d 07' 19"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.98d {+12h 27m 55s}   -7.92d {-07d 55' 04"}
MOON_DIST:        94.84 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [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:     Sat 11 Feb 12 12:05:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.767d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.754d {-24d 45' 14"} (J2000)
ROLL:            241.266d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43231.26 SOD {12:00:31.26} UT,   123.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     350654439
X_OFFSET:        907 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1067
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00514586000msuni0131.fits
SUN_POSTN:       324.52d {+21h 38m 06s}  -14.12d {-14d 07' 19"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.98d {+12h 27m 55s}   -7.92d {-07d 55' 08"}
MOON_DIST:        94.84 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:05:41 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     514586,   Seg_Num: 0
GRB_RA:           87.7535d {+05h 51m 00.84s} (J2000),
                  87.8776d {+05h 51m 30.62s} (current),
                  87.2414d {+05h 48m 57.93s} (1950)
GRB_DEC:         -24.7747d {-24d 46' 28.9"} (J2000),
                 -24.7721d {-24d 46' 19.6"} (current),
                 -24.7869d {-24d 47' 12.6"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43247.00 SOD {12:00:47.00} UT,   138.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       324.53d {+21h 38m 06s}  -14.12d {-14d 07' 18"}
SUN_DIST:        112.45 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      186.99d {+12h 27m 56s}   -7.92d {-07d 55' 16"}
MOON_DIST:        94.85 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.76,-23.68 [deg] galactic lon,lat of the burst
ECL_COORDS:       86.94,-48.19 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
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:        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:     Sat 11 Feb 12 12:10:10 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 06"} (J2000)
POINT_ROLL:      241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43389.38 SOD {12:03:09.38} UT,   281.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.455
N_STARS:         183
X_OFFSET:        348 [pixels]
Y_OFFSET:        264 [pixels]
X_MAX:           1787 [pixels]
Y_MAX:           1703 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00514586000msufc0281.fits
SUN_POSTN:       324.53d {+21h 38m 07s}  -14.12d {-14d 07' 15"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.03d {+12h 28m 07s}   -7.94d {-07d 56' 13"}
MOON_DIST:        94.88 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:10:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 06"} (J2000)
POINT_ROLL:      241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43389.38 SOD {12:03:09.38} UT,   281.3 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.455
N_STARS:         183
X_OFFSET:        348 [pixels]
Y_OFFSET:        264 [pixels]
X_MAX:           1787 [pixels]
Y_MAX:           1703 [pixels]
DET_THRESH:      6
PHOTO_THRESH:    3
SL_URL:          sw00514586000msufc0281.fits
SUN_POSTN:       324.53d {+21h 38m 07s}  -14.12d {-14d 07' 14"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.03d {+12h 28m 08s}   -7.94d {-07d 56' 19"}
MOON_DIST:        94.88 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [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:     Sat 11 Feb 12 12:10:49 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     514586,   Seg_Num: 0
GRB_RA:           87.7537d {+05h 51m 00.88s} (J2000),
                  87.8778d {+05h 51m 30.67s} (current),
                  87.2416d {+05h 48m 57.98s} (1950)
GRB_DEC:         -24.7758d {-24d 46' 32.8"} (J2000),
                 -24.7732d {-24d 46' 23.6"} (current),
                 -24.7880d {-24d 47' 16.6"} (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:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43247.00 SOD {12:00:47.00} UT,   138.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       324.53d {+21h 38m 07s}  -14.12d {-14d 07' 14"}
SUN_DIST:        112.45 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.03d {+12h 28m 08s}   -7.94d {-07d 56' 22"}
MOON_DIST:        94.89 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.76,-23.68 [deg] galactic lon,lat of the burst
ECL_COORDS:       86.94,-48.19 [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:     Sat 11 Feb 12 12:11:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 06"} (J2000)
ROLL:            241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43389.38 SOD {12:03:09.38} UT,   281.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     350654597
X_OFFSET:        907 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1067
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00514586000msuni0289.fits
SUN_POSTN:       324.53d {+21h 38m 07s}  -14.12d {-14d 07' 14"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.04d {+12h 28m 09s}   -7.94d {-07d 56' 28"}
MOON_DIST:        94.88 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [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:     Sat 11 Feb 12 12:11:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 06"} (J2000)
ROLL:            241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43389.38 SOD {12:03:09.38} UT,   281.3 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     350654597
X_OFFSET:        907 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1067
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00514586000msuni0289.fits
SUN_POSTN:       324.53d {+21h 38m 07s}  -14.12d {-14d 07' 14"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.04d {+12h 28m 10s}   -7.94d {-07d 56' 32"}
MOON_DIST:        94.89 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #12920
E. Sonbas (NASA/GSFC/Adiyaman Univ.), W. H. Baumgartner (GSFC/UMBC), D. N. Burrows (PSU), N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU), V. Mangano (INAF-IASFPA), C. Pagani (U Leicester), K. L. Page (U Leicester) and D. M. Palmer (LANL) report on behalf of the Swift Team:
At 11:58:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120211A (trigger=514586). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 87.751, -24.759 which is
```
   RA(J2000) = 05h 51m 00s
   Dec(J2000) = -24d 45' 32"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked structure with a duration of about 30 sec. The peak count rate was ~300 counts/sec (15-350 keV), at ~3 sec after the trigger.
The XRT began observing the field at 12:00:27.6 UT, 119.5 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source located at RA, Dec 87.75354, -24.77477 which is equivalent to:
```
   RA(J2000)  = 05h 51m 00.85s
   Dec(J2000) = -24d 46' 29.2"
```
with an uncertainty of 3.9 arcseconds (radius, 90% containment). This location is 57 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 consistent with the Galactic value of 1.73 x 10^20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 123 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.
Burst Advocate for this burst is E. Sonbas (edasonbas AT yahoo.com). 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:     Sat 11 Feb 12 12:15:50 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 07"} (J2000)
POINT_ROLL:      241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43968.19 SOD {12:12:48.19} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.518
N_STARS:         190
X_OFFSET:        348 [pixels]
Y_OFFSET:        264 [pixels]
X_MAX:           1787 [pixels]
Y_MAX:           1703 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00514586000msufc0860.fits
SUN_POSTN:       324.53d {+21h 38m 08s}  -14.12d {-14d 07' 10"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.08d {+12h 28m 19s}   -7.96d {-07d 57' 26"}
MOON_DIST:        94.91 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sat 11 Feb 12 12:16:12 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 07"} (J2000)
POINT_ROLL:      241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43968.19 SOD {12:12:48.19} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.518
N_STARS:         190
X_OFFSET:        348 [pixels]
Y_OFFSET:        264 [pixels]
X_MAX:           1787 [pixels]
Y_MAX:           1703 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00514586000msufc0860.fits
SUN_POSTN:       324.53d {+21h 38m 08s}  -14.12d {-14d 07' 10"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.08d {+12h 28m 20s}   -7.96d {-07d 57' 31"}
MOON_DIST:        94.92 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [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:     Sat 11 Feb 12 12:17:13 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 07"} (J2000)
ROLL:            241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43968.19 SOD {12:12:48.19} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     350655176
X_OFFSET:        907 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1067
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00514586000msuni0868.fits
SUN_POSTN:       324.53d {+21h 38m 08s}  -14.12d {-14d 07' 09"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.09d {+12h 28m 22s}   -7.96d {-07d 57' 44"}
MOON_DIST:        94.92 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [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:     Sat 11 Feb 12 12:17:26 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     514586,   Seg_Num: 0
POINT_RA:         87.768d {+05h 51m 04s} (J2000)
POINT_DEC:       -24.752d {-24d 45' 07"} (J2000)
ROLL:            241.267d
IMG_START_DATE:  15968 TJD;    42 DOY;   12/02/11
IMG_START_TIME:  43968.19 SOD {12:12:48.19} UT,   860.1 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     350655176
X_OFFSET:        907 [pixels]
Y_OFFSET:        823 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1067
Y_GRB_POS:       983
BINNING_INDEX:   1
IM_URL:          sw00514586000msuni0868.fits
SUN_POSTN:       324.53d {+21h 38m 08s}  -14.12d {-14d 07' 09"}
SUN_DIST:        112.47 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      187.10d {+12h 28m 23s}   -7.96d {-07d 57' 47"}
MOON_DIST:        94.92 [deg]
MOON_ILLUM:      84 [%]
GAL_COORDS:      229.74,-23.66 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       86.96,-48.17 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #12921
F. J. Virgili, C.G. Mundell, I.A. Steele, R.J. Smith, C.J. Mottram, D.F. Bersier, S. Kobayashi (Liverpool, JMU), A. Gomboc, J. Japelj, D. Kopac (U. Ljubljana), C. Guidorzi (U. Ferrara), A. Melandri (INAF-OAB) report:
"The 2-m Faulkes Telescope South responded robotically to followup GRB120211A (SWIFT trigger 514586; Sonbas et al. GCN 12920) 3.77 min after the GRB trigger time. No optical counterpart within the XRT error circle is detected to the following conservative limits:
R > 21.5 mag (vs USNOB1) at 0.51 hrs from BAT trigger (total exposure = 720 s) i' > 20.4 mag (vs USNOB1) at 0.58 hrs from BAT trigger (total exposure = 700 s)
We also note the presence of a USNOB-1 object lying on the XRT error circle border: 05:51:00.786, -24:46:23.86, with R2=20.19 and I=18.74 mag
This message may be cited"
GCN Circular #12922
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 1401 s of XRT Photon Counting mode data and 2 UVOT images for GRB 120211A, 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 = 87.75371, -24.77521 which is equivalent to:
```
RA (J2000): 05h 51m 0.89s
Dec (J2000): -24d 46' 30.8"
```
with an uncertainty of 1.9 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 #12923
Kenshi Yanagisawa, Daisuke Kuroda, Yasuhiro Shimizu, Kiichi Okita (OAO/NAOJ), Michitoshi Yoshida (Hiroshima-U), Kouji Ohta(Kyoto-U), and Nobuyuki Kawai(Tokyo Tech.) report on behalf of the MITSuME collaboration:
We observed the field of GRB120211A (Sonbas et al., GCNC 12920) in Ks-band with a wide-field NIR camera at Okayama Astrophysical Observatory (Japan). The camera has an effective aperture of 0.91m.
Observations started from 12:08 UT on 11th Feburuary, 10.1 min after the BAT trigger, to 13:22 UT. The total exposure of 60 min was successfully obtained.
In our co-add image, we did not find any new point source within the enhanced XRT error circle (Goad et al., GCNC 12922) down to limiting magnitude of Ks= 15.5(Vega, S/N=3). The photometric calibration was made against 2MASS field stars.
```
T0+[min]    MID-UT     T-EXP[min]      Ks
---------------------------------------------------
  +47.1     12:45        60.0       >15.5 (S/N=3)
---------------------------------------------------
T0+ : Elapsed time after the burst [sec]
T-EXP: Total Exposure time [sec]
```
GCN Circular #12924
T. N. Ukwatta (MSU) S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), E. Sonbas (NASA/GSFC/Adiyaman U), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from recent telemetry downlinks, we report further analysis of BAT GRB 120211A (trigger #514586) (Sonbas, et al., GCN Circ. 12920). The BAT ground-calculated position is RA, Dec = 87.781, -24.795 deg, which is
```
   RA(J2000)  =  05h 51m 07.5s 
   Dec(J2000) = -24d 47' 43.6" 
```
with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 64%.
The mask-weighted light curve shows 2 or 3 overlapping peaks starting at ~T-10 sec, peaking at ~T+42 sec, and ending at ~T+140 sec. T90 (15-350 keV) is 61.7 +- 6.4 sec (estimated error including systematics).
The time-averaged spectrum from T-2.34 to T+64.10 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.50 +- 0.22. The fluence in the 15-150 keV band is 8.1 +- 1.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+40.97 sec in the 15-150 keV band is 0.5 +- 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/514586/BA/
GCN Circular #12925
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, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov, A.Sankovich Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnich, A. Popov Ural State University, Kourovka
H.Levato, C.Mallamaci, C.Saffe ICATE (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio), San Juan, San Juan University, Felix Aguilar Observatory, Argentina
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB120211A (SWIFT trigger 514586; Sonbas et al. GCN 12920) 77 sec after GRB time at 2012-02-11 11:59:45.629 UT. On our first (20s exposure) set we haven`t found optical transient within SWIFT error-box (ra=05 51 00 dec=-24 45 36 ). The 5-sigma upper limit has been about 16.3 mag.
The message may be cited.
GCN Circular #12926
N. P. M. Kuin (MSSL-UCL) and E. Sonbas (NASA/GSFC/ Adiyaman_Univ.) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120211A 123 s after the BAT trigger (Sonbas et al., GCN Circ. 12920). No optical afterglow consistent with the XRT enhanced position (Goad et al., GCN Circ. 12922) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           123          273          147         >21.1
u_FC               281          531          246         >20.9
white              123         1528          392         >21.6
v                  612         1577          117         >19.7
b                  537         1503           97         >20.3
u                  281         1478          324         >20.9
w1                 662         1626          117         >20.2
m2                 637         1602          117         >20.1
w2                 588         1553          117         >20.0
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #12927
V. Mangano (INAF-IASFPA), D.N. Burrows (PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU) and E. Sonbas report on behalf of the Swift-XRT team:
We have analysed 6.4 ks of XRT data for GRB 120211A (Sonbas et al. GCN Circ. 12920), from 133 s to 13.2 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 12922).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=1.47 (+0.33, -0.22). At T+1267 s the decay flattens to an alpha of -0.14 (+0.20, -1.36) before breaking again at T+11.0 ks to a final decay with index alpha=6.6 (+1.4, -4.1).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.29 (+0.21, -0.20). The best-fitting absorption column is 6.5 (+6.5, -4.8) x 10^20 cm^-2, consistent with the Galactic value of 1.7 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 5.4 x 10^-11 (5.8 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     6.5 (+6.5, -4.8) x 10^20 cm^-2
Galactic foreground: 1.7 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.29 (+0.21, -0.20)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00514586.
This circular is an official product of the Swift-XRT team.
GCN Circular #12928
Brajesh Kumar, Vijay Bhatt and S. B. Pandey (ARIES Nainital, India, on behalf of larger Indian GRB collaboration).
The swift GRB 120211A (trigger =514586, Sonbas et al., GCN 12920) was observed with the 104-cm telescope at ARIES Nainital. We took a sequence of images starting at 13:31:26 UT on 11 Feb in R_c and I_c pass-bands with an exposure time of 300 sec each.
Photometry of the co-added R_c frame (300 sec x 4), in comparison to the nearby USNO- B1 stars, did not detect any new source within the XRT error-box down to a limiting magnitude of ~ 20 mag.
This massage may be cited.
GCN Circular #12929
D. Kuroda, (OAO, NAOJ), H. Hanayama (IAO, NAOJ), K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), T. Miyaji J. Watanabe, (IAO, NAOJ), S.Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 120211A (Sonbas et al., GCNC 12920) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory and the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory.
We did not find any new point source within the enhanced XRT error circle (Goad et al., GCNC 12922) in all the three bands.
Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
Okayama Astrophysical Observatory: The observation started on 012-02-11 11:59:56 UT (~1.5 min after the burst).
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.00444    12:04:52     540.0    >19.5  >19.5  >19.0
0.04267    12:59:55    6360.0    >20.3  >20.2  >19.7
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
Ishigakijima Astronomical Observatory: The observation started on 2012-02-11 12:43:55 UT (~45 min after the burst).
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.04104    12:57:34    1260.0    >20.8  >20.5  >19.0
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #12931
J. Elliott, V. Sudilovsky and J. Greiner (all MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 120211A (Swift trigger 514586; Sonbas et al., GCN 12920) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG/ESO telescope at La Silla Observatory (Chile).
Observations started at 00:27 UT on 12 February 2012, 12.5 hours after the GRB trigger. They were performed at an average seeing of 1.3" and at an average airmass of 1.0. A total integration time of 90 minutes and 76 minutes was obtained in g'r'i'z' and JHK respectively.
We do not detect a source within the Swift-XRT error circle reported by Goad et al. (GCN 12922) down to the following 3-sigma limits (all AB):
```
g' > 25.8
r' > 25.7
i' > 25.0
z' > 24.1
J  > 21.7
H  > 21.0
K  > 19.9
```
The given limits are derived based on calibrating the images against GROND zeropoints and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E(B-V) = 0.03 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #12953
Jang, M., Im, M. (SNU), & Urata, Y. (NCU)
We observed GRB 120211A (Sonbas et al., GCN 12920) in SDSS i,z-bands with a 1 m telescope at Mt. Lemmon, Arizona, U.S. The obsevation started at 04:03:00 2012-02-12 UT, ~ 17 hours after the burst alert. We took 4 frames for each filter alternatively with the exposure time 300s. No afterglow candidate was found in the enhanced XRT position (Goad et al., GCN12922) in stacked images of both i and z.
We thank the LOAO operator, J. Yoon for this observation.
GCN Report 370.1
GCN_Report 370.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_370_1.pdf by E. Sonbas at GSFC/Adiyaman U. titled: "Final Swift Observations of GRB 120211A"
arXiv:1505.06743 X-shooter Ly-alpha break redshift: 2.4+-0.1

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Jochen Greiner, last update: 25-Jun-2015 [Disclaimer]