Gamma-ray Burst 100219A

(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:     Fri 19 Feb 10 15:17:04 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     412982,   Seg_Num: 0
GRB_RA:          154.221d {+10h 16m 53s} (J2000),
                 154.345d {+10h 17m 23s} (current),
                 153.607d {+10h 14m 26s} (1950)
GRB_DEC:         -12.559d {-12d 33' 31"} (J2000),
                 -12.610d {-12d 36' 34"} (current),
                 -12.309d {-12d 18' 31"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=1426 [image_cnts]
TRIGGER_DUR:     64.000 [sec] 
TRIGGER_INDEX:   20000     E_range: 15-50 keV
BKG_INTEN:       0 [cnts]
BKG_TIME:        0.00 SOD {00:00:00.00} UT
BKG_DUR:         0 [sec]
GRB_DATE:        15246 TJD;    50 DOY;   10/02/19
GRB_TIME:        54946.45 SOD {15:15:46.45} UT
GRB_PHI:          32.22 [deg]
GRB_THETA:        25.40 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.44 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0 +91  +0 
SUN_POSTN:       332.92d {+22h 11m 40s}  -11.17d {-11d 09' 53"}
SUN_DIST:        156.18 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.24d {+01h 52m 58s}  +17.03d {+17d 01' 45"}
MOON_DIST:       127.86 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.54, 35.41 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      160.98,-21.61 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
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 = 112.30,-3.84 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:18:52 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.194d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 16"} (J2000)
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55124.96 SOD {15:18:44.96} UT,   178.5 [sec] since BAT Trigger Time
COUNTS:          11    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:     Fri 19 Feb 10 15:20:12 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     412982,   Seg_Num: 0
GRB_RA:          154.221d {+10h 16m 53s} (J2000),
                 154.345d {+10h 17m 23s} (current),
                 153.607d {+10h 14m 26s} (1950)
GRB_DEC:         -12.559d {-12d 33' 31"} (J2000),
                 -12.610d {-12d 36' 34"} (current),
                 -12.309d {-12d 18' 31"} (1950)
GRB_DATE:        15246 TJD;    50 DOY;   10/02/19
GRB_TIME:        54946.45 SOD {15:15:46.45} UT
TRIGGER_INDEX:   20000
GRB_PHI:          32.22 [deg]
GRB_THETA:        25.40 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.44 [sigma]
LC_URL:          sw00412982000msb.lc
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 50"}
SUN_DIST:        156.18 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.27d {+01h 53m 04s}  +17.04d {+17d 02' 18"}
MOON_DIST:       127.84 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.54, 35.41 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      160.98,-21.61 [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 an image 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 = 112.30,-3.84 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:21:51 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.194d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 16"} (J2000)
POINT_ROLL:      176.809d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55129.47 SOD {15:18:49.47} UT,   183.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.139
N_STARS:         37
X_OFFSET:        648 [pixels]
Y_OFFSET:        276 [pixels]
X_MAX:           1607 [pixels]
Y_MAX:           1235 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00412982000msufc0183.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 49"}
SUN_DIST:        156.22 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.28d {+01h 53m 08s}  +17.04d {+17d 02' 35"}
MOON_DIST:       127.79 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:21:51 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.194d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 16"} (J2000)
POINT_ROLL:      176.809d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55129.47 SOD {15:18:49.47} UT,   183.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.139
N_STARS:         37
X_OFFSET:        648 [pixels]
Y_OFFSET:        276 [pixels]
X_MAX:           1607 [pixels]
Y_MAX:           1235 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00412982000msufc0183.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 49"}
SUN_DIST:        156.22 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.28d {+01h 53m 08s}  +17.04d {+17d 02' 35"}
MOON_DIST:       127.79 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:22:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.194d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 16"} (J2000)
POINT_ROLL:      176.809d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55129.47 SOD {15:18:49.47} UT,   183.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.139
N_STARS:         37
X_OFFSET:        648 [pixels]
Y_OFFSET:        276 [pixels]
X_MAX:           1607 [pixels]
Y_MAX:           1235 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00412982000msufc0183.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 48"}
SUN_DIST:        156.22 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.29d {+01h 53m 09s}  +17.04d {+17d 02' 41"}
MOON_DIST:       127.79 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 19 Feb 10 15:23:14 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.194d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 16"} (J2000)
ROLL:            176.809d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55129.47 SOD {15:18:49.47} UT,   183.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     288285535
X_OFFSET:        967 [pixels]
Y_OFFSET:        595 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1127
Y_GRB_POS:       755
BINNING_INDEX:   1
IM_URL:          sw00412982000msuni0189.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 48"}
SUN_DIST:        156.22 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.29d {+01h 53m 11s}  +17.05d {+17d 02' 50"}
MOON_DIST:       127.78 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 19 Feb 10 15:23:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.194d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 16"} (J2000)
ROLL:            176.809d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55129.47 SOD {15:18:49.47} UT,   183.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     288285535
X_OFFSET:        967 [pixels]
Y_OFFSET:        595 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1127
Y_GRB_POS:       755
BINNING_INDEX:   1
IM_URL:          sw00412982000msuni0189.fits
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 47"}
SUN_DIST:        156.22 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.30d {+01h 53m 11s}  +17.05d {+17d 02' 53"}
MOON_DIST:       127.78 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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:     Fri 19 Feb 10 15:23:36 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     412982,   Seg_Num: 0
GRB_RA:          154.2021d {+10h 16m 48.50s} (J2000),
                 154.3265d {+10h 17m 18.35s} (current),
                 153.5886d {+10h 14m 21.26s} (1950)
GRB_DEC:         -12.5661d {-12d 33' 57.9"} (J2000),
                 -12.6169d {-12d 37' 00.9"} (current),
                 -12.3161d {-12d 18' 57.9"} (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:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55153.00 SOD {15:19:13.00} UT,   206.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       332.92d {+22h 11m 41s}  -11.16d {-11d 09' 47"}
SUN_DIST:        156.18 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.30d {+01h 53m 11s}  +17.05d {+17d 02' 53"}
MOON_DIST:       127.79 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.52, 35.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      160.97,-21.63 [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:     Fri 19 Feb 10 15:27:12 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.196d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
POINT_ROLL:      176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55287.47 SOD {15:21:27.47} UT,   341.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.598
N_STARS:         52
X_OFFSET:        408 [pixels]
Y_OFFSET:        36 [pixels]
X_MAX:           1847 [pixels]
Y_MAX:           1475 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00412982000msufc0341.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 44"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.33d {+01h 53m 19s}  +17.06d {+17d 03' 31"}
MOON_DIST:       127.75 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:27:12 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.196d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
POINT_ROLL:      176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55287.47 SOD {15:21:27.47} UT,   341.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.598
N_STARS:         52
X_OFFSET:        408 [pixels]
Y_OFFSET:        36 [pixels]
X_MAX:           1847 [pixels]
Y_MAX:           1475 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00412982000msufc0341.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 44"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.33d {+01h 53m 19s}  +17.06d {+17d 03' 31"}
MOON_DIST:       127.75 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:27:41 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.196d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
POINT_ROLL:      176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55287.47 SOD {15:21:27.47} UT,   341.0 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.598
N_STARS:         52
X_OFFSET:        408 [pixels]
Y_OFFSET:        36 [pixels]
X_MAX:           1847 [pixels]
Y_MAX:           1475 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00412982000msufc0341.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 44"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.33d {+01h 53m 20s}  +17.06d {+17d 03' 36"}
MOON_DIST:       127.74 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 19 Feb 10 15:28:22 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.196d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
ROLL:            176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55287.47 SOD {15:21:27.47} UT,   341.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     288285693
X_OFFSET:        967 [pixels]
Y_OFFSET:        595 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1127
Y_GRB_POS:       755
BINNING_INDEX:   1
IM_URL:          sw00412982000msuni0347.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 43"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.34d {+01h 53m 21s}  +17.06d {+17d 03' 43"}
MOON_DIST:       127.74 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 19 Feb 10 15:28:26 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     412982,   Seg_Num: 0
GRB_RA:          154.2023d {+10h 16m 48.55s} (J2000),
                 154.3267d {+10h 17m 18.40s} (current),
                 153.5888d {+10h 14m 21.31s} (1950)
GRB_DEC:         -12.5670d {-12d 34' 01.2"} (J2000),
                 -12.6178d {-12d 37' 04.1"} (current),
                 -12.3170d {-12d 19' 01.1"} (1950)
GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55153.00 SOD {15:19:13.00} UT,   206.6 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 43"}
SUN_DIST:        156.18 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.34d {+01h 53m 21s}  +17.06d {+17d 03' 44"}
MOON_DIST:       127.75 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.53, 35.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      160.97,-21.63 [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:     Fri 19 Feb 10 15:28:47 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.196d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
ROLL:            176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55287.47 SOD {15:21:27.47} UT,   341.0 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     288285693
X_OFFSET:        967 [pixels]
Y_OFFSET:        595 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1127
Y_GRB_POS:       755
BINNING_INDEX:   1
IM_URL:          sw00412982000msuni0347.fits
SUN_POSTN:       332.92d {+22h 11m 42s}  -11.16d {-11d 09' 43"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.34d {+01h 53m 22s}  +17.06d {+17d 03' 47"}
MOON_DIST:       127.74 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 #10430
A. Rowlinson (U Leicester), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), V. D'Elia (ASDC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL), O. M. Littlejohns (U Leicester), V. Mangano (INAF-IASFPA), J. Mao (INAF-OAB), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), C. Pagani (U. Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (INAF-IASFPA), T. Sakamoto (NASA/UMBC), B. Sbarufatti (INAF-OAB/IASFPA), M. H. Siegel (PSU), M. Stamatikos (OSU/NASA/GSFC), M. A. Stark (PSU), M. C. Stroh (PSU) and L. Vetere (PSU) report on behalf of the Swift Team:
At 15:15:46 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100219A (trigger=412982). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 154.221, -12.559 which is
```
   RA(J2000)  =  10h 16m 53s
   Dec(J2000) = -12d 33' 31"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is usual for an image trigger, the BAT light curve shows nothing of interest.
The XRT began observing the field at 15:18:45.0 UT, 178.5 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 154.2024, -12.5671 which is equivalent to:
```
   RA(J2000)  = 10h 16m 48.58s
   Dec(J2000) = -12d 34' 01.7"
```
with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 71 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 6.51e+20 cm^-2 (Kalberla et al. 2005).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 183 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 0.08.
Burst Advocate for this burst is A. Rowlinson (bar7 AT star.le.ac.uk). 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:     Fri 19 Feb 10 15:34:20 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.195d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
POINT_ROLL:      176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55821.45 SOD {15:30:21.45} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.134
N_STARS:         97
X_OFFSET:        408 [pixels]
Y_OFFSET:        36 [pixels]
X_MAX:           1847 [pixels]
Y_MAX:           1475 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00412982000msufc0874.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 38"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.39d {+01h 53m 33s}  +17.08d {+17d 04' 45"}
MOON_DIST:       127.69 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:34:48 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.195d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
POINT_ROLL:      176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55821.45 SOD {15:30:21.45} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.134
N_STARS:         97
X_OFFSET:        408 [pixels]
Y_OFFSET:        36 [pixels]
X_MAX:           1847 [pixels]
Y_MAX:           1475 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00412982000msufc0874.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 37"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.39d {+01h 53m 34s}  +17.08d {+17d 04' 50"}
MOON_DIST:       127.69 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 19 Feb 10 15:34:20 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.195d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
POINT_ROLL:      176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55821.45 SOD {15:30:21.45} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.134
N_STARS:         97
X_OFFSET:        408 [pixels]
Y_OFFSET:        36 [pixels]
X_MAX:           1847 [pixels]
Y_MAX:           1475 [pixels]
DET_THRESH:      12
PHOTO_THRESH:    6
SL_URL:          sw00412982000msufc0874.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 38"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.39d {+01h 53m 33s}  +17.08d {+17d 04' 45"}
MOON_DIST:       127.69 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Fri 19 Feb 10 15:35:46 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.195d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
ROLL:            176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55821.45 SOD {15:30:21.45} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     288286226
X_OFFSET:        967 [pixels]
Y_OFFSET:        595 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1127
Y_GRB_POS:       755
BINNING_INDEX:   1
IM_URL:          sw00412982000msuni0880.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 37"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.40d {+01h 53m 36s}  +17.08d {+17d 05' 00"}
MOON_DIST:       127.68 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 19 Feb 10 15:36:13 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     412982,   Seg_Num: 0
POINT_RA:        154.195d {+10h 16m 47s} (J2000)
POINT_DEC:       -12.521d {-12d 31' 14"} (J2000)
ROLL:            176.805d
IMG_START_DATE:  15246 TJD;    50 DOY;   10/02/19
IMG_START_TIME:  55821.45 SOD {15:30:21.45} UT,   875.0 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     288286226
X_OFFSET:        967 [pixels]
Y_OFFSET:        595 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1127
Y_GRB_POS:       755
BINNING_INDEX:   1
IM_URL:          sw00412982000msuni0880.fits
SUN_POSTN:       332.93d {+22h 11m 43s}  -11.16d {-11d 09' 36"}
SUN_DIST:        156.23 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
MOON_POSTN:       28.41d {+01h 53m 37s}  +17.08d {+17d 05' 05"}
MOON_DIST:       127.68 [deg]
MOON_ILLUM:      26 [%]
GAL_COORDS:      254.48, 35.42 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      160.94,-21.59 [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 #10432
S. T. Holland (CRESST/GSFC/USRA), N. P. M. Kuin (UCL-MSSL), and A. Rowlinson (U Leicester) report on the behalf of the Swift/UVOT team:
The Swift/UVOT observed the field of GRB 100219A (Rowlinson et al. 2010, GCN Circ. 10430) starting 183 s after the BAT detection. We do not detect any source inside the XRT error circle, but we do detect a source 3.8 arcsec north of the centre of the 2.1 arcsec XRT error circle. This source is not present in the SDSS DR7, USNO B1.0, or 2MASS point source catalogues. It is at the detection limit of the DSS, so it is unclear if this is a new source. The preliminary UVOT position is
```
     RA (J2000)  10:16:48.54  =  154.20225 (deg)
    Dec (J2000) -12:33:57.9   =  -12.56608 (deg)
```
with an estimated uncertainty of 1.0 arcsec (radius, 90% confidence, statistical + systematic).
Preliminary magnitudes for this source are
```
Filter   TSTART    TSTOP   Exposure      Mag   Err   Sigma
---------------------------------------------------------------
white       183      333        150    20.70  0.34     3.2
white       875     1025        150   >20.9            3-sigma UL
u           341      591        250    21.00  0.56     2.0
---------------------------------------------------------------
```
It is not clear if this source is fading, or if it is associated with GRB 100219A.
The quoted magnitudes have not been corrected for the expected Galactic extinction along the line of sight corresponding to a reddening of E_{B-V} = 0.08 mag (Schlegel et al., 1998, ApJS, 500, 525). All photometry is on the UVOT photometry system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #10433
J. S. Bloom (UC Berkeley) and P. E. Nugent (LBNL) report:
"We co-added 27 archival images from the DeepSky* project at Palomar Observatory covering the field of GRB 100219A (Rowlinson et al. 2010, GCN Circ. 10430). The images were obtained between 2004-2007 from the Palomar-Quest Consortium at the Oschin Schmidt telescope. The limiting magnitude of the stack is approximately R ~ 22.5 mag.
In the combined image we detect a faint (R = 21.0 +/- 0.3 mag relative to nearby USNO catalog stars) slightly extended source, outside the current XRT error circle to the North by ~3.7". The approximate (+/- 1") coordinates of the source are:
RA = 10:16:48.52, DEC = -12:33:57.5 (J2000)
Within the errors, this is coincident with the UVOT source reported by Holland et al. (GCN 10432). This is a potential (lowish redshift) host candidate of the event and we encourage spectroscopic follow-up."
* http://supernova.lbl.gov/~nugent/deepsky.html
GCN Circular #10434
W. H. Baumgartner (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. Rowlinson (U Leicester), T. Sakamoto (GSFC/UMBC), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (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 100219A (trigger #412982) (Rowlinson, et al., GCN Circ. 10430). The BAT ground-calculated position is RA, Dec = 154.202, -12.555 deg which is
```
   RA(J2000)  =  10h 16m 48.4s 
   Dec(J2000) = -12d 33' 19.4" 
```
with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 71%.
The mask-weighted light curve shows a roughly triangular shaped peak starting at ~T-10sec, peaking at ~T+30 sec, and ending at ~T+50 sec (possibly out to ~T+100 sec). T90 (15-350 keV) is 18.8 +- 5.0 sec (estimated error including systematics).
The time-averaged spectrum from T+19 to T+45 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.34 +- 0.25. The fluence in the 15-150 keV band is 3.7 +- 0.6 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+31.89 sec in the 15-150 keV band is 0.4 +- 0.1 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/412982/BA/
GCN Circular #10436
S. T. Holland (CRESST/GSFC/USRA) and A. Rowlinson (U. Leicester) report on the behalf of the Swift UVOT team:
Swift/UVOT began settled observations of the field of GRB 100219A starting 161 s after the BAT trigger (Rowlinson, et al. 2010, GCN Circ. 10430). Settled exposures started at T+183 s. The source reported by Holland, et al. (2010, GCN Circ. 104322) is seen in the white and u-band exposures. Preliminary 3-sigma magnitudes and upper limits are
```
Filter   T_start   T_stop   Exp(s)      Mag  Err
------------------------------------------------------
white       183       333     150     20.91 0.28
white       875      1718     225    >21.6  3-sigma UL
v           673      1767     136    >19.7  3-sigma UL
b           598      1693     117    >20.5  3-sigma UL
u           341      1668     343     20.35 0.35
uvw1        722      1812     113    >19.9  3-sigma UL
uvm2        697      1792      39    >18.3  3-sigma UL
uvw2        648      1297      78    >19.5  3-sigma UL
------------------------------------------------------
```
The fading observed between T+183 s and T+875 s suggests that this is the afterglow of GRB 100219A superimposed on the host galaxy candidate of Bloom and Nugent (2010, GCN Circ. 10433). The weak detection in the u band suggests that this source has a redshift of less than approximately 2.8.
The quoted magnitudes have not been corrected for the expected Galactic extinction along the line of sight corresponding to a reddening of E_{B-V} = 0.08 mag (Schlegel, et al., 1998, ApJS, 500, 525). All photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
GCN Circular #10437
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
Using 1938 s of XRT Photon Counting mode data and 4 UVOT images for GRB 100219A, 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 = 154.20206, -12.56671 which is equivalent to:
```
RA (J2000): 10h 16m 48.49s
Dec (J2000): -12d 34' 00.2"
```
with an uncertainty of 1.4 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 #10438
P. Jakobsson (U. Iceland), D. Malesani (DARK, NBI), C. Villforth (Tuorla Observatory), J. Hjorth, D. J. Watson (DARK, NBI) and N. R. Tanvir (U. Leicester) report on behalf of a larger collaboration:
Using StanCam on the Nordic Optical Telescope (NOT) we have obtained R-band imaging of the GRB 100219A field (Rowlinson et al., GCN 10430) on Feb 20.02 (9.25 hours after the burst). Right in the middle of the revised XRT error circle (Evans et al., GCN 10437) we detect an object at the following coordinates:
```
RA(J2000) = 10:16:48.49
Dec(J2000) = -12:34:00.5
```
Its magnitude is R = 22.2 +- 0.1 based on USNO-B1 calibration. The object first noticed by Holland & Rowlinson (GCN 10436) and found in pre-explosion images by Bloom & Nugent (GCN 10437) is well detected in our images, and is located 3.1" NNE of the above object.
An image of the field is shown at:
http://www.astro.ku.dk/~malesani/GRB/100219A/finder_100219A.png
GCN Circular #10439
T. Kruehler (MPE), A. Nicuesa (Tautenburg Obs.), S. Klose (Tautenburg Obs.), J. Greiner and P. Afonso (both MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 100219A (Swift trigger #412982; Rowlinson et al., GCN #10430) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPI/ESO telescope at LaSilla Observatory (Chile).
Observations started on 20 February 2010 at 00:30 UT, 8.7 hours after the GRB trigger.
Inside the XRT error circle (Evans et al., GCN #10437), we detect the source mentioned in Jakobsson et al. GCN #10438, spatially separated by 3" from the object mentioned in Holland et al. GCN#10432 and Bloom & Nugent GCN #10433.
The object inside the XRT error circle is well detected in the r' band and redder, but not in g'. Preliminary photometry yields an AB magnitude of i'=21.5 calibrated against the GROND zeropoint at 9.0 hours after the trigger. At the moment no statement about variability can be made. However, if this is the afterglow of GRB 100219A, its colors indicate a relatively high redshift event (z around 4.5).
GCN Circular #10440
D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), H. Nakajima, Y.Yatsu, Y.A.Mori, A.Endo, T. Shimokawabe, and N. Kawai(Tokyo Tech), S. Nagayama (NAOJ), M. Yoshida (Hiroshima) and K. Ohta (Kyoto) report on behalf of the MITSuME collaboration:
We observed the field of GRB 100219A (Rowlinson et al. GCN 10430) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Akeno Observatory and Okayama Astrophysical Observatory. We found the afterglow at the XRT position (Holland et al. GCN 10432, Rowlinson et al. GCN 10435 and Evans et al. GCN 10437) in Rc and Ic band.
The coordinates of the object are:
```
RA(J2000.0)   10:16:48.50 (+- 0.5 arcsec)
DEC(J2000.0) -12:34:00.6  (+- 0.3 arcsec)
```
But we could not detect the optical afterglow previously reported by Holland and Rowlinson (GCN 10436)
Photometric results and three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.
Akeno Observatory: The observation started on 2010-02-19 15:17:30 UT (104s after the trigger).
```
PDAY     MID-UT    T-EXP    g'      Rc       Ic
-----------------------------------------------------
0.00471  15:22:34   540.0        19.8+-0.3 18.5+-0.3
----------------------------------------------------
```
Okayama Astrophysical Observatory: The observation started on 2010-02-19 15:20:08 UT (262 sec after the trigger).
```
PDAY     MID-UT    T-EXP    g'      Rc       Ic
-----------------------------------------------------
0.00675  15:25:30   540.0 >19.1   >19.0    17.8+-0.2
0.01428  15:36:21   540.0 >19.1   >19.1    17.5+-0.1
0.02177  15:47:07   540.0 >19.1  18.4+-0.2 18.1+-0.3
0.06589  16:50:40  3000.0 >19.4   >19.7    18.9+-0.3
-----------------------------------------------------
```
GCN Circular #10441
P. Groot (Radboud Univ. Nijmegen), L. Kaper, L. Ellerbroek (Univ. Amsterdam), D. Malesani (DARK/NBI), P. Jakobsson (Univ. Iceland), J. P. U. Fynbo, J. Hjorth, D. J. Watson (DARK/NBI), and E. Mason (ESO), report on behalf of a larger collaboration:
We observed the optical objects associated to GRB 100219A (Rowlinson et al., GCN 10430; Holland & Rowlinson, GCN 10432; Bloom & Nugent, GCN 10433; Jakobsson et al., GCN 10438; Kruehler et al., GCN 10439) with the VLT equipped with the X-shooter spectrograph. The slit was oriented so to include both the pre-existing object and the candidate afterglow. Observations started on 2010 Feb 20.105 UT (0.47 days after the GRB), for a total exposure time of 4x1200 s.
In a preliminary analysis of the spectra, we detect a clear signal from both objects. The continuum from the candidate afterglow is only detected redward of ~5310 AA. A further spectral break is recognised at ~7060 AA. This is consistent with the onset of the Lyman limits and of the Lyman alpha forest at a common redshift z = 4.8. Our observations are consistent with the photometric redshift indicated by the GROND observations (Kruehler et al., GCN 10439).
The high luminosity of the object and its spectral shape indicate that this is indeed the afterglow of GRB 100219A.
The spectrum of the nearby galaxy implies a significantly lower redshift, around z=0.25, hence it is unrelated to the GRB.
We caution that the above analysis (particularly the wavelength solution) is preliminary. Reduction with updated calibrations is underway. We would like to thank Alain Smette (ESO) for his kind assistance.
GCN Circular #10443
S. B. Cenko, J. S. Bloom, D. A. Perley, and B. E. Cobb (UC Berkeley) report on behalf of a larger collaboration:
We have obtained spectra of the proposed host galaxy (Bloom and Nugent, GCN 10433; Holland et al., GCN 10436) and the optical afterglow (Jakobsson et al., GCN 10438; Kruehler et al., GCN 10439) of GRB100219A (Rowlinson et al., GCN 10430) with the Gemini Multi-Object Spectrograph mounted on the 8-m Gemini South telescope. Our first sequence of 2 x 900 s observations started at 2:44 UT on 20 February 2010 and cover the range from 6500 - 9500 A. Only the proposed host galaxy was contained on the slit for these spectra. Our second set, starting immediately afterward, cover the wavelength range from 4500 - 7500 A and both the proposed host and afterglow are positioned on the slit.
From the nearby galaxy, we detect strong emissions features corresponding to H-alpha, H-beta, and [O III] at a common redshift of z = 0.217.
The spectrum of the afterglow shows a strong break at ~ 6880 A, with only faint continuum blueward of this feature. Interpreting this as the Lyman-alpha break, this correponds to a redshift of z ~ 4.7. We find marginal evidence for narrow absorption features corresponding to Si II and Si II* at z = 4.65 redward of the break - however the relatively low signal-to-noise ratio of our spectrum in this regime makes this result somewhat uncertain.
Our derived redshifts for both objects are similar to, though slightly less than, the values derived by Groot et al. (GCN 10441) from the VLT/X-shooter. They are also consistent with the photometric redshift of z ~ 4.5 derived by Kruehler et al. (GCN 10439) from GROND.
GCN Circular #10444
A. Rowlinson (U Leicester) reports on behalf of the Swift-XRT team:
We have analysed 3.8 ks of XRT data for GRB 100219A (Rowlinson et al. GCN Circ. 10430), from 207 s to 28.4 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 10437).
The light curve can be modelled with an initial power-law decay with an index of alpha=1.53 (+0.28, -0.22), followed by a break at T+785 s to an alpha of 0.57 (+/-0.06).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.72 (+0.16, -0.13). The best-fitting absorption column is 8.8 (+4.2, -0.0) x 10^20 cm^-2, in excess of the Galactic value of 6.5 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 4.5 x 10^-11 (5.3 x 10^-11) erg cm^-2 count^-1.
If the light curve continues to decay with a power-law decay index of 0.57, the count rate at T+24 hours will be 0.035 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.6 x 10^-12 (1.8 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00412982. This circular is an official product of the Swift-XRT team.
GCN Circular #10445
A. de Ugarte Postigo, C.C. Thoene (INAF/OAB), S.D. Vergani (APC/Univ. Paris 7), B. Milvang-Jensen, J. Fynbo (DARK/NBI) report on behalf of the X-shooter GRB collaboration:
We continued with the analysis of X-shooter's spectrum (Groot et al. GCN 10441) obtained for the afterglow of GRB 100219A (Rowlinson et al. GCN 10430). Additionally to the strong Ly-alpha absorption reported in the previous GCN and the SiII and SiII* absorptions suggested by Cenko et al. (GCN 10443) we detect several other absorption features, including SII, OI, OI*, CII, CII*, SiIV, CIV, FeII, AlII and AlIII at a redshift of 4.6667 +/- 0.0005. We also detect an intervening system at z = 2.1810 +/- 0.0005 through the identification of FeII, MgII and MgI. A second intervening system might be present at z = 1.7980 +/- 0.0005 identified by faint MgII and MgI absorptions. Further analysis is ongoing.
GCN Circular #10452
K. Kinugasa, S. Honda, H. Takahashi, H. Taguchi, O. Hashimoto (Gunma Astronomical Observatory) report:
The position of GRB 100219A (Rowlinson et al., GCN 10430) was observed with the 150 cm telescope of Gunma Astronomical Observatory. Starting at 16:06:16 UT on Feb.19 (0.84 hour after the trigger), both Rc and Ic frames were acquired for sets of 5 x 3-min exposures.
Inside the XRT error circle (Evans et al., GCN 10437), we detected the optical counterpart reported by Jakobsson et al. (GCN 10438), Kruehler et al. (GCN 10439), and Kuroda et al. (GCN 10440) in Rc and Ic stacked images. We estimated the Rc and Ic magnitudes relative to USNO-B1.0 R2 and I magnitudes, respectively.
```
mid-UT     T0+(d)     exp       mag.            
-----------------------------------------------------
16:15:24   0.0414    5x3min     Rc=20.5+-0.2     
16:34:45   0.0549    5x3min     Ic=19.6+-0.3     
-----------------------------------------------------
```
GCN Circular #10453
V. Rumyantsev, D. Shakhovskoy (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 100219A (Rowlinson et al. GCN 10438) with AZT-11 telescope of CrAO starting (UT) Feb. 19 22:54 (7.6 hours after burst onset). We detect the galaxy (previously reported by Holland & Rowlinson (GCN 10436), Bloom & Nugent (GCN 10437)). The coordinates of the galaxy are (J2000) RA= 10 16 48.61, Dec= -12 33 57.15 (with uncertainties 0.5 arcsec in both coordinates). We do not detect optical afterglow (Jakobsson et al. GCN 10430, Kruehler et al. GCN 10439). The photometry is based on USNO-B1.0 star 0774-0276292 (assuming R=16.90):
```
T0+      Filter,   Exposure,  mag.               Object
(mid, d)              (s)

0.3364   R       20x180       21.3 +/- 0.25    galaxy
0.3364   R       20x180    > 21.8                OT
```
GCN Circular #10522
A. Volnova (SAI MSU), E. Klunko (ISTP), and A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 100219A (Rowlinson et al. GCN 10438) with AZT-33IK telescope of Sayan observatory (Mondy) starting on Feb.19 (UT) 16:16:18, i.e. 1.0 hours after the burst. Observations were carried out up to (UT) 16:59:26. We do not detect any objects in enhanced XRT error circle (Evans et al. GCN 10437). The upper limit (3 sigma) of stacked image of the first series is based on several USNO-B1.0 nearby stars:
```
T0+   Filter  Exposure  mag.
(mid, d)          (s)

0.0431   R    3x60      > 19.00 
```
GCN Circular #10527
V.Yurkov, Yu.Sergienko, D.Varda, A.Garusina Blagoveschensk Educational State University, Blagoveschensk
E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zemnukhov, M. Kornilov Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalozhnih, T.Kopytova, A. Popov Ural State University, Kourovka
K.Ivanov, S.Yazev, N.M.Budnev, E.Konstantinov, V.Lenok Irkutsk State University
MASTER robotic telescope (MASTER-Net: http://observ.pereplet.ru, 200 mm, FOV=8 square degrees (testing telescope) and Very Wide Field Camera (D=50 mm, 1000 square degrees, 11 Mpx, 36" per pix, mounted on telescope) located at Blagoveschensk was responted to the GRB 100219A (Swift Bat alert, Gelbord et al, GCN CIRC 10526) 64 sec after Notice time and 78 s after the GRB time.
There is now OT on the first 20-s exposition time image inside Swift XRT error box (Gelbord et al., GCN CIRC 10526) brighter 16.0.
The message may be cited.
mailto: lipunov@sai.msu.ru
1112.0744 from 6 Dec 11
J. Mao et al.: Diversity of multiwavelength emission bumps in the GRB 100219A afterglow
Context. Multi-wavelength observations of gamma-ray burst (GRB) afterglows provide important information about the activity of their central engines and their environments. In particular, the short timescale variability, such as bumps and/or rebrightening features visible in the multi-wavelength light curves, is still poorly understood. Aims. We analyze the multi-wavelength observations of the GRB100219A afterglow at redshift 4.7. In particular, we attempt to identify the physical origin of the late achromatic flares/bumps detected in the X-ray and optical bands. Methods. We present ground-based optical photometric data and Swift X-ray observations on GRB100219A. We analyzed the temporal behavior of the X-ray and optical light curves, as well as the X-ray spectra. Results. The early flares in the X-ray and optical light curves peak simultaneously at about 1000 s after the burst trigger, while late achromatic bumps in the X-ray and optical bands appear at about 20000 s after the burst trigger. These are uncommon features in the afterglow phenomenology. Considering the temporal and spectral properties, we argue that both optical and X-ray emissions come from the same mechanism. The late flares/bumps may be produced by late internal shocks from long-lasting activity of the central engine. An off-axis origin for a structured jet model is also discussed to interpret the bump shapes. The early optical bump can be interpreted as the afterglow onset, while the early X-ray flare could be caused by the internal activity. GRB 100219A exploded in a dense environment as revealed by the strong attenuation of X-ray emission and the optical-to-X-ray spectral energy distribution.
1206.2337 from 12 Jun 12
C. C. Thoene et al.: GRB 100219A with X-shooter - abundances in a galaxy at z = 4.7
Abundances of galaxies at redshifts z > 4 are difficult to obtain from damped Ly {\alpha} (DLA) systems in the sightlines of quasars (QSOs) due to the Ly {\alpha} forest blanketing and the low number of high-redshift quasars detected. Gamma-ray bursts (GRBs) with their higher luminosity are well suited to study galaxies out to the formation of the first stars at z > 10. Its large wavelength coverage makes the X-shooter spectrograph an excellent tool to study the interstellar medium (ISM) of high redshift galaxies, in particular if the redshift is not known beforehand. Here we determine the properties of a GRB host at z = 4.66723 from a number of resonant low- and high ionization and fine-structure absorption lines. This is one of the highest redshifts where a detailed analysis with medium-resolution data has been possible. We detect one intervening system at z = 2.18. The velocity components of the absorption lines are fitted with Voigt-profiles and we determine a metallicity of [M/H] = -1.0 \pm 0.1 using S. The absorption lines show a complicated kinematic structure which could point to a merger in progress. Si II* together with the restframe UV energy release determined from GROND data gives us the distance of 0.3 to 1 kpc of the absorbing material from the GRB. We measure a low extinction of AV = 0.24 \pm 0.06 mag using X-ray spectral information and the flux calibrated X-shooter spectrum. GRB-DLAs have a shallower evolution of metallicity with redshift than QSO absorbers and no evolution in HI column density or ionization fraction. GRB hosts at high redshift might continue the trend towards lower metallicities in the LZ-relation with redshift, but the sample is still too small to draw a definite conclusion. While the detection of GRBs at z > 4 with current satellites is still difficult, they are very important for our understanding of the early epochs of star- and galaxy-formation.

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Jochen Greiner, last update: 12-Jun-2012 [Disclaimer]