Gamma-ray Burst 100212A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:07:36 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     412081,   Seg_Num: 0
GRB_RA:          356.462d {+23h 45m 51s} (J2000),
                 356.588d {+23h 46m 21s} (current),
                 355.843d {+23h 43m 22s} (1950)
GRB_DEC:         +49.497d {+49d 29' 50"} (J2000),
                 +49.554d {+49d 33' 13"} (current),
                 +49.220d {+49d 13' 10"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4355 [cnts]    Image_Peak=371 [image_cnts]
TRIGGER_DUR:     0.512 [sec] 
TRIGGER_INDEX:   124     E_range: 25-100 keV
BKG_INTEN:       43734 [cnts]
BKG_TIME:        50826.47 SOD {14:07:06.47} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15239 TJD;    43 DOY;   10/02/12
GRB_TIME:        50842.02 SOD {14:07:22.02} UT
GRB_PHI:         -102.31 [deg]
GRB_THETA:        15.55 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     28.40 [sigma]
IMAGE_SIGNIF:    14.49 [sigma]
MERIT_PARAMS:     +1  +0  +0  -1  +2  +3  +0  +0 -36  +0 
SUN_POSTN:       326.07d {+21h 44m 17s}  -13.60d {-13d 36' 10"}
SUN_DIST:         68.64 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.16d {+20h 36m 39s}  -17.09d {-17d 05' 16"}
MOON_DIST:        78.70 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.13,-11.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       22.29, 45.53 [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 = 21.88,9.68 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Fri 12 Feb 10 13:12:37 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    5988,   Sub_Num: 0
GRB_INTEN:      9.23 [sigma]
GRB_TIME:       47505.04 SOD {13:11:45.04} UT
GRB_DATE:       15239 TJD;    43 DOY;   10/02/12
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:
COMMENTS:        NOTE: This SPIACS event is temporally(0.0<100sec) coincident with the FERMI_GBM event (trignum=287673107).
COMMENTS:
ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2010-02/2010-02-12T13-11-44.8948-241+53-00007-0.lc

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:08:01 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      57
TRIGGER_NUM:     287676444
GRB_RA:            4.680d {+00h 18m 43s} (J2000),
                   4.814d {+00h 19m 15s} (current),
                   4.018d {+00h 16m 04s} (1950)
GRB_DEC:         +45.530d {+45d 31' 48"} (J2000),
                 +45.586d {+45d 35' 10"} (current),
                 +45.252d {+45d 15' 09"} (1950)
GRB_ERROR:       4.05 [deg radius, statistical only]
DATA_SIGNIF:     6.20 [sigma]
DATA_INTERVAL:   1.024 [sec]
GRB_DATE:        15239 TJD;    43 DOY;   10/02/12
GRB_TIME:        50842.29 SOD {14:07:22.29} UT
GRB_PHI:         294.00 [deg]
GRB_THETA:        15.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   413 (Gnd S/W Version number)
SUN_POSTN:       326.07d {+21h 44m 17s}  -13.60d {-13d 36' 09"}
SUN_DIST:         68.74 [deg]   Sun_angle= -2.6 [hr] (East of Sun)
MOON_POSTN:      309.17d {+20h 36m 40s}  -17.09d {-17d 05' 12"}
MOON_DIST:        80.35 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      116.95,-16.96 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       25.72, 39.20 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:07:41 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      48
TRIGGER_NUM:     287676444
GRB_RA:            7.250d {+00h 29m 00s} (J2000),
                   7.388d {+00h 29m 33s} (current),
                   6.572d {+00h 26m 17s} (1950)
GRB_DEC:         +48.683d {+48d 40' 60"} (J2000),
                 +48.739d {+48d 44' 21"} (current),
                 +48.407d {+48d 24' 25"} (1950)
GRB_ERROR:       10.57 [deg radius, statistical plus systematic]
GRB_INTEN:       126 [cnts/sec]
DATA_SIGNIF:     5.70 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        15239 TJD;    43 DOY;   10/02/12
GRB_TIME:        50842.29 SOD {14:07:22.29} UT
GRB_PHI:         280.00 [deg]
GRB_THETA:        15.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      1.45
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   1%  Generic SGR
DETECTORS:       1,0,0, 1,0,0, 1,0,0, 0,0,0, 0,0,
SUN_POSTN:       326.07d {+21h 44m 17s}  -13.60d {-13d 36' 10"}
SUN_DIST:         72.26 [deg]   Sun_angle= -2.8 [hr] (East of Sun)
MOON_POSTN:      309.16d {+20h 36m 39s}  -17.09d {-17d 05' 15"}
MOON_DIST:        83.62 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      119.12,-14.02 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       29.81, 40.99 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 3.82,-6.00 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:09:00 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     412081,   Seg_Num: 0
GRB_RA:          356.4192d {+23h 45m 40.60s} (J2000),
                 356.5448d {+23h 46m 10.74s} (current),
                 355.8007d {+23h 43m 12.16s} (1950)
GRB_DEC:         +49.4958d {+49d 29' 44.8"} (J2000),
                 +49.5520d {+49d 33' 07.2"} (current),
                 +49.2180d {+49d 13' 04.9"} (1950)
GRB_ERROR:       5.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.39e-09 [erg/cm2/sec]
GRB_SIGNIF:      8.12 [sigma]
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50899.76 SOD {14:08:19.76} UT,   57.7 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.23 261.53 243.21
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       326.07d {+21h 44m 17s}  -13.60d {-13d 36' 08"}
SUN_DIST:         68.62 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.17d {+20h 36m 42s}  -17.08d {-17d 05' 02"}
MOON_DIST:        78.67 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.10,-11.99 [deg] galactic lon,lat of the burst
ECL_COORDS:       22.25, 45.54 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.66 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:09:15 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     412081,   Seg_Num: 0
GRB_RA:          356.4192d {+23h 45m 40.6s} (J2000),
                 356.5448d {+23h 46m 10.7s} (current),
                 355.8007d {+23h 43m 12.1s} (1950)
GRB_DEC:         +49.4958d {+49d 29' 44.8"} (J2000),
                 +49.5520d {+49d 33' 07.2"} (current),
                 +49.2180d {+49d 13' 04.9"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       66 [cnts]
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50899.76 SOD {14:08:19.76} UT,   57.7 [sec] since BAT Trigger Time
CENTROID_X:      249.92,  raw= 250  [pixels]
CENTROID_Y:      264.86,  raw= 265  [pixels]
ROLL:            211.89 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -78.10
GRB_POS_XRT_Z:   -123.47
IMAGE_URL:       sw00412081000msxps_rw.img
SUN_POSTN:       326.07d {+21h 44m 17s}  -13.60d {-13d 36' 08"}
SUN_DIST:         68.62 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.18d {+20h 36m 42s}  -17.08d {-17d 05' 00"}
MOON_DIST:        78.67 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.10,-11.99 [deg] galactic lon,lat of the burst
ECL_COORDS:       22.25, 45.54 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:09:10 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     412081,   Seg_Num: 0
GRB_RA:          356.4192d {+23h 45m 40.6s} (J2000),
                 356.5448d {+23h 46m 10.7s} (current),
                 355.8007d {+23h 43m 12.1s} (1950)
GRB_DEC:         +49.4958d {+49d 29' 44.8"} (J2000),
                 +49.5520d {+49d 33' 07.2"} (current),
                 +49.2180d {+49d 13' 04.9"} (1950)
GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       66 [cnts]
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50899.76 SOD {14:08:19.76} UT,   57.7 [sec] since BAT Trigger Time
CENTROID_X:      249.92,  raw= 250  [pixels]
CENTROID_Y:      264.86,  raw= 265  [pixels]
ROLL:            211.89 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -78.10
GRB_POS_XRT_Z:   -123.47
IMAGE_URL:       sw00412081000msxps_rw.img
SUN_POSTN:       326.07d {+21h 44m 17s}  -13.60d {-13d 36' 08"}
SUN_DIST:         68.62 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.17d {+20h 36m 42s}  -17.08d {-17d 05' 00"}
MOON_DIST:        78.67 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.10,-11.99 [deg] galactic lon,lat of the burst
ECL_COORDS:       22.25, 45.54 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:11:06 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     412081,   Seg_Num: 0
GRB_RA:          356.462d {+23h 45m 51s} (J2000),
                 356.588d {+23h 46m 21s} (current),
                 355.843d {+23h 43m 22s} (1950)
GRB_DEC:         +49.497d {+49d 29' 50"} (J2000),
                 +49.554d {+49d 33' 13"} (current),
                 +49.220d {+49d 13' 10"} (1950)
GRB_DATE:        15239 TJD;    43 DOY;   10/02/12
GRB_TIME:        50842.02 SOD {14:07:22.02} UT
TRIGGER_INDEX:   124
GRB_PHI:         -102.31 [deg]
GRB_THETA:        15.55 [deg]
DELTA_TIME:      45.00 [sec]
TRIGGER_DUR:     0.512 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     28.40 [sigma]
IMAGE_SIGNIF:    14.49 [sigma]
LC_URL:          sw00412081000msb.lc
SUN_POSTN:       326.07d {+21h 44m 18s}  -13.60d {-13d 36' 07"}
SUN_DIST:         68.64 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.19d {+20h 36m 46s}  -17.08d {-17d 04' 41"}
MOON_DIST:        78.68 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.13,-11.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       22.29, 45.53 [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 = 21.88,9.68 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:11:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.513d {+49d 30' 45"} (J2000)
POINT_ROLL:      211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50910.27 SOD {14:08:30.27} UT,   68.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.534
N_STARS:         185
X_OFFSET:        781 [pixels]
Y_OFFSET:        559 [pixels]
X_MAX:           1740 [pixels]
Y_MAX:           1518 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00412081000msufc0068.fits
SUN_POSTN:       326.07d {+21h 44m 18s}  -13.60d {-13d 36' 06"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.19d {+20h 36m 47s}  -17.08d {-17d 04' 36"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:11:58 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.513d {+49d 30' 45"} (J2000)
ROLL:            211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50910.27 SOD {14:08:30.27} UT,   68.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     287676515
X_OFFSET:        1101 [pixels]
Y_OFFSET:        879 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1261
Y_GRB_POS:       1039
BINNING_INDEX:   1
IM_URL:          sw00412081000msuni0074.fits
SUN_POSTN:       326.07d {+21h 44m 18s}  -13.60d {-13d 36' 06"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.20d {+20h 36m 47s}  -17.08d {-17d 04' 33"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.53 [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:     Fri 12 Feb 10 14:12:24 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.513d {+49d 30' 45"} (J2000)
ROLL:            211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50910.27 SOD {14:08:30.27} UT,   68.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     287676515
X_OFFSET:        1101 [pixels]
Y_OFFSET:        879 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1261
Y_GRB_POS:       1039
BINNING_INDEX:   1
IM_URL:          sw00412081000msuni0074.fits
SUN_POSTN:       326.07d {+21h 44m 18s}  -13.60d {-13d 36' 06"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.20d {+20h 36m 48s}  -17.07d {-17d 04' 28"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.53 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:12:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.513d {+49d 30' 45"} (J2000)
POINT_ROLL:      211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50910.27 SOD {14:08:30.27} UT,   68.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.534
N_STARS:         185
X_OFFSET:        781 [pixels]
Y_OFFSET:        559 [pixels]
X_MAX:           1740 [pixels]
Y_MAX:           1518 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00412081000msufc0068.fits
SUN_POSTN:       326.07d {+21h 44m 18s}  -13.60d {-13d 36' 06"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.20d {+20h 36m 48s}  -17.08d {-17d 04' 30"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.53 [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:     Fri 12 Feb 10 14:11:36 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.513d {+49d 30' 45"} (J2000)
POINT_ROLL:      211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  50910.27 SOD {14:08:30.27} UT,   68.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        3.534
N_STARS:         185
X_OFFSET:        781 [pixels]
Y_OFFSET:        559 [pixels]
X_MAX:           1740 [pixels]
Y_MAX:           1518 [pixels]
DET_THRESH:      16
PHOTO_THRESH:    9
SL_URL:          sw00412081000msufc0068.fits
SUN_POSTN:       326.07d {+21h 44m 18s}  -13.60d {-13d 36' 06"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.19d {+20h 36m 47s}  -17.08d {-17d 04' 36"}
MOON_DIST:        78.69 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.53 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:18:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
POINT_ROLL:      211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51122.67 SOD {14:12:02.67} UT,   280.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.973
N_STARS:         152
X_OFFSET:        781 [pixels]
Y_OFFSET:        559 [pixels]
X_MAX:           1740 [pixels]
Y_MAX:           1518 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00412081000msufc0280.fits
SUN_POSTN:       326.08d {+21h 44m 19s}  -13.60d {-13d 36' 00"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.25d {+20h 37m 00s}  -17.06d {-17d 03' 27"}
MOON_DIST:        78.65 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:19:05 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
POINT_ROLL:      211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51122.67 SOD {14:12:02.67} UT,   280.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.973
N_STARS:         152
X_OFFSET:        781 [pixels]
Y_OFFSET:        559 [pixels]
X_MAX:           1740 [pixels]
Y_MAX:           1518 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00412081000msufc0280.fits
SUN_POSTN:       326.08d {+21h 44m 19s}  -13.60d {-13d 36' 00"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.26d {+20h 37m 01s}  -17.06d {-17d 03' 22"}
MOON_DIST:        78.65 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [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:     Fri 12 Feb 10 14:18:33 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
POINT_ROLL:      211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51122.67 SOD {14:12:02.67} UT,   280.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.973
N_STARS:         152
X_OFFSET:        781 [pixels]
Y_OFFSET:        559 [pixels]
X_MAX:           1740 [pixels]
Y_MAX:           1518 [pixels]
DET_THRESH:      8
PHOTO_THRESH:    4
SL_URL:          sw00412081000msufc0280.fits
SUN_POSTN:       326.08d {+21h 44m 19s}  -13.60d {-13d 36' 00"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.25d {+20h 37m 00s}  -17.06d {-17d 03' 27"}
MOON_DIST:        78.65 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:20:06 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
ROLL:            211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51122.67 SOD {14:12:02.67} UT,   280.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     287676728
X_OFFSET:        1101 [pixels]
Y_OFFSET:        879 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1261
Y_GRB_POS:       1039
BINNING_INDEX:   1
IM_URL:          sw00412081000msuni0286.fits
SUN_POSTN:       326.08d {+21h 44m 19s}  -13.60d {-13d 36' 00"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.26d {+20h 37m 03s}  -17.05d {-17d 03' 12"}
MOON_DIST:        78.64 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [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:     Fri 12 Feb 10 14:20:25 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.476d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
ROLL:            211.888d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51122.67 SOD {14:12:02.67} UT,   280.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     287676728
X_OFFSET:        1101 [pixels]
Y_OFFSET:        879 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1261
Y_GRB_POS:       1039
BINNING_INDEX:   1
IM_URL:          sw00412081000msuni0286.fits
SUN_POSTN:       326.08d {+21h 44m 19s}  -13.60d {-13d 35' 59"}
SUN_DIST:         68.66 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.27d {+20h 37m 04s}  -17.05d {-17d 03' 09"}
MOON_DIST:        78.64 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [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:     Fri 12 Feb 10 14:25:26 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.477d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
POINT_ROLL:      211.889d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51700.03 SOD {14:21:40.03} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.954
N_STARS:         190
X_OFFSET:        541 [pixels]
Y_OFFSET:        319 [pixels]
X_MAX:           1980 [pixels]
Y_MAX:           1758 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00412081000msufc0858.fits
SUN_POSTN:       326.08d {+21h 44m 20s}  -13.60d {-13d 35' 55"}
SUN_DIST:         68.65 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.31d {+20h 37m 14s}  -17.04d {-17d 02' 19"}
MOON_DIST:        78.61 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:25:26 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.477d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
POINT_ROLL:      211.889d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51700.03 SOD {14:21:40.03} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.954
N_STARS:         190
X_OFFSET:        541 [pixels]
Y_OFFSET:        319 [pixels]
X_MAX:           1980 [pixels]
Y_MAX:           1758 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00412081000msufc0858.fits
SUN_POSTN:       326.08d {+21h 44m 20s}  -13.60d {-13d 35' 55"}
SUN_DIST:         68.65 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.31d {+20h 37m 14s}  -17.04d {-17d 02' 19"}
MOON_DIST:        78.61 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 12 Feb 10 14:25:56 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.477d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
POINT_ROLL:      211.889d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51700.03 SOD {14:21:40.03} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.954
N_STARS:         190
X_OFFSET:        541 [pixels]
Y_OFFSET:        319 [pixels]
X_MAX:           1980 [pixels]
Y_MAX:           1758 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    8
SL_URL:          sw00412081000msufc0858.fits
SUN_POSTN:       326.08d {+21h 44m 20s}  -13.60d {-13d 35' 54"}
SUN_DIST:         68.65 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.31d {+20h 37m 15s}  -17.04d {-17d 02' 14"}
MOON_DIST:        78.61 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [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:     Fri 12 Feb 10 14:26:51 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.477d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
ROLL:            211.889d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51700.03 SOD {14:21:40.03} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     287677305
X_OFFSET:        1100 [pixels]
Y_OFFSET:        878 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1260
Y_GRB_POS:       1038
BINNING_INDEX:   1
IM_URL:          sw00412081000msuni0864.fits
SUN_POSTN:       326.08d {+21h 44m 20s}  -13.60d {-13d 35' 54"}
SUN_DIST:         68.65 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.32d {+20h 37m 16s}  -17.03d {-17d 02' 05"}
MOON_DIST:        78.60 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [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:     Fri 12 Feb 10 14:27:03 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     412081,   Seg_Num: 0
GRB_RA:          356.4184d {+23h 45m 40.41s} (J2000),
                 356.5440d {+23h 46m 10.55s} (current),
                 355.7999d {+23h 43m 11.97s} (1950)
GRB_DEC:         +49.4938d {+49d 29' 37.6"} (J2000),
                 +49.5500d {+49d 33' 00.0"} (current),
                 +49.2160d {+49d 12' 57.7"} (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:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51317.00 SOD {14:15:17.00} UT,   475.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       326.08d {+21h 44m 20s}  -13.60d {-13d 35' 53"}
SUN_DIST:         68.61 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.32d {+20h 37m 17s}  -17.03d {-17d 02' 03"}
MOON_DIST:        78.56 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.10,-11.99 [deg] galactic lon,lat of the burst
ECL_COORDS:       22.25, 45.54 [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:     Fri 12 Feb 10 14:27:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     412081,   Seg_Num: 0
POINT_RA:        356.477d {+23h 45m 54s} (J2000)
POINT_DEC:       +49.516d {+49d 30' 58"} (J2000)
ROLL:            211.889d
IMG_START_DATE:  15239 TJD;    43 DOY;   10/02/12
IMG_START_TIME:  51700.03 SOD {14:21:40.03} UT,   858.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     287677305
X_OFFSET:        1100 [pixels]
Y_OFFSET:        878 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1260
Y_GRB_POS:       1038
BINNING_INDEX:   1
IM_URL:          sw00412081000msuni0864.fits
SUN_POSTN:       326.08d {+21h 44m 20s}  -13.60d {-13d 35' 53"}
SUN_DIST:         68.65 [deg]   Sun_angle= -2.0 [hr] (East of Sun)
MOON_POSTN:      309.32d {+20h 37m 17s}  -17.03d {-17d 02' 01"}
MOON_DIST:        78.60 [deg]
MOON_ILLUM:      2 [%]
GAL_COORDS:      112.14,-11.98 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       22.31, 45.54 [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 #10401
D. Grupe (PSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), S. Campana (INAF-OAB), V. D'Elia (ASDC), P. A. Evans (U Leicester), J. M. Gelbord (PSU), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), O. M. Littlejohns (U Leicester), V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB), R. Margutti (Univ Bicocca&OAB), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), M. Perri (ASDC), P. Romano (INAF-IASFPA), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), R. L. C. Starling (U Leicester), G. Tagliaferri (INAF-OAB), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team:
At 14:07:22 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100212A (trigger=412081). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 356.462, +49.497 which is
```
   RA(J2000) = 23h 45m 51s
   Dec(J2000) = +49d 29' 50"
```
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 2 sec. The peak count rate was ~5500 counts/sec (15-350 keV), at ~0 sec after the trigger.
The XRT began observing the field at 14:08:19.8 UT, 57.7 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 356.41805, 49.49497 which is equivalent to:
```
   RA(J2000)  = 23h 45m 40.33s
   Dec(J2000) = +49d 29' 41.9"
```
with an uncertainty of 3.7 arcseconds (radius, 90% containment). This location is 103 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 (1.3e+21 cm^-2, Kalberla et al. 2005), with an excess column of 2.5 (+1.73/-1.52) x 10^21 cm^-2 (90% confidence).
The initial flux in the 2.5 s image was 1.39e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 280 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. 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 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.18.
Burst Advocate for this burst is D. Grupe (grupe AT astro.psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #10402
D. Malesani, G. Leloudas, J. P. U. Fynbo (DARK/NBI), D. Xu (WIS and DARK/NBI), P. Jakobsson (Univ. Iceland), A. Somero, S. Katajainen (Tuorla Obs.), T. Pursimo (NOT), report on behalf of a larger collaboration:
We observed the field of GRB 100212A (Grupe et al., GCN 10401) with the NOT equipped with ALFOSC. Observations started on Feb 12.841 UT (6.05 hr after the GRB), in the R band.
Close to the refined XRT error circle (as reported in the SPER web page http://www.swift.ac.uk/sper/index.php at 21:30 UT), we detect a source which is not visible in the DSS. Its coordinates are (J2000):
```
RA = 23:45:40.23
Dec = +49:29:40.7
```
The object is 2.5" away from the centre of the XRT position, currently reported to have a 2.2" error radius.
The R-band magnitude of the source is R = 20.3 assuming R = 17.3 for the USNO star at RA = 23:45:42.93, Dec = +49:30:29.3. The source looks pointlike under a seeing of 1" and is clearly brighter than other closeby objects visible in the DSS.
We suggest this object to be the afterglow of GRB 100212A.
GCN Circular #10403
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 699 s of XRT Photon Counting mode data and 3 UVOT images for GRB 100212A, 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 = 356.41830, +49.49432 which is equivalent to:
```
RA (J2000): 23h 45m 40.39s
Dec (J2000): +49d 29' 39.6"
```
with an uncertainty of 2.0 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 #10404
T. N. Ukwatta (GWU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) (i.e. the Swift-BAT team):
Using the data set from T-61 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 100212A (trigger #412081) (Grupe, et al., GCN Circ. 10401). The BAT ground-calculated position is RA, Dec = 356.445, 49.492 deg, which is
```
   RA(J2000)  =  23h 45m 46.9s 
   Dec(J2000) = +49d 29' 30.5" 
```
with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 86%.
The mask-weighted light curve shows multiple peaks. The main peak starts with weak emission at ~T-45 sec with the peak at ~T+0.2 sec and ends at ~T+30 sec. A second peak starts at ~T+75 and ends at ~T+135 sec. T90 (15-350 keV) is 136 +- 14 sec (estimated error including systematics).
The time-averaged spectrum from T-4.8 to T+134.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.20 +- 0.22. The fluence in the 15-150 keV band is 9.1 +- 1.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.34 sec in the 15-150 keV band is 2.2 +- 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/412081/BA/
GCN Circular #10405
D. Grupe (PSU) reports on behalf of the Swift-XRT team:
We have analyzed 1.9 ks of XRT data for GRB 100212A (Grupe et al. GCN Circ. 10401), from 64 s to 7 ks after the BAT trigger. The data comprise 409 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 10403).
The light curve is complicated displaying several strong flares up to 700s after the burst. The underlying afterglow light curve suggests a step decay slope of alpha=2.89+/-0.09. However, the data of the second orbit indicate the beginning of the plateau phase with a significantly flatter decay slope. Predictions of the further development of the X-ray light curve are not reliable at this point.
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.03 (+/-0.03). The best-fitting absorption column is 1.97 (+/-0.08) x 10^21 cm^-2, in excess of the Galactic value of 1.3 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.8 x 10^-11 (5.6 x 10^-11) ergs cm^-2 count^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00412081.
This circular is an official product of the Swift-XRT team.
GCN Circular #10406
Sylvain Guiriec (UAH) and Dave Tierney (UCD/MPE) report on behalf of the Fermi GBM Team:
"At 14:07:29 UT on 12 February 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 100212A (trigger 287676444 / 100212588).
This GRB has also been detected independently with Swift/BAT and the GBM location is consistent with the Swift/XRT location within the error bars (Grupe et al. GCN Circ. 10401).
The angle from the Fermi LAT boresight is 15 degrees.
The GRB duration (T90) is about 2.30+/-0.14 s (8-1000 keV). The time-averaged spectrum from T0-0.51 s to T0+0.26 s is adequately fit by a power law with an index of -1.62+/-0.06 (Castor C-stat 394 for 363 d.o.f.). It is also adequately fit by a power law function with an exponential high energy cutoff. The power law index is -1.15 +/- 0.20 and the cutoff energy, parameterized as Epeak, is 159.30 +/- 45.10 keV (Castor C-stat 389 for 362 d.o.f.).
The event fluence (8-1000 keV) in the T90 time interval is (3.81+/-0.06)E-7 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.7 s in the 8-1000 keV band is 3.16 +/- 0.22 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #10407
M. Im (CEOU/Seoul National Univ) and Y. Urata (NCU) on behalf of EAFON team.
We observed GRB100212A (Grupe et al. GCN 10401) in R and V using the 1.0m telescope at Mt. Lemmon (Arizona, US) operated by the Korea Astronomy Space Science Institute. The observation started at Feb. 13, 02:05:14 UT, about 12 hours after the BAT trigger.
The stacked R-band image shows a marginal detection of the afterglow with R ~ 22.5 +- 0.2 mag, at the location reported by Malesani et al. (GCN 10402). The mid-point for the R-band imaging is 02:17:36 UT. The object does not appear in a stacked V-band image, which was taken right after the R-band observation. Our obseravation shows that the afterglow candidate faded significantly since the report by Malesani et al. (GCN 10402), confirming that this is indeed a GRB afterglow. The photometry was calibrated against the USNO star (GCN 10402).
We thank the LOAO operator, J. Yoon for her assistance of this observation.
GCN Circular #10409
M. De Pasquale (MSSL/UCL) and D. Grupe (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 100212A 68 s after the BAT trigger (Grupe et al., GCN Circ. 10401) with the finding chart in the white filter. No optical afterglow is detected within the enhanced XRT error circle position (Osborne et al., GCN Circ 10403) in the initial UVOT exposure and in all other summed exposures at 3 sigma level. The optical source detected by NOT (Malesani et al, GCN circ 10402) is not detected either at 3 sigma level.
Preliminary 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            68          218          147         >20.6
u_FC               281          530          246         >19.8
white               68         1181          353         >21.2
v                  610         1231           78         >18.7
b                  536         1156           58         >19.5
u                  281         1304          304         >19.8
w1                 660         1280           78         >19.2
m2                 635         1255           78         >19.3
w2                 586         1206           78         >19.6
```
The values quoted above are not corrected for the strong Galactic extinction due to the reddening of E(B-V) = 0.18 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #10409
The previous GCN 10408 dealt with GRB100212A, not GRB120212A as erroneously written. I apologize for the mistake.
GCN Report 267.1
GCN_Report 267.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_267_1.pdf by D. Grupe at PSU titled: "Final Swift Observations of GRB 100212A"

Back to JG's homepage

Jochen Greiner, last update: 12-Feb-2010 [Disclaimer]