Gamma-ray Burst 101219B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:45:31 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     440635,   Seg_Num: 0
GRB_RA:           12.257d {+00h 49m 02s} (J2000),
                  12.388d {+00h 49m 33s} (current),
                  11.656d {+00h 46m 37s} (1950)
GRB_DEC:         -34.532d {-34d 31' 53"} (J2000),
                 -34.472d {-34d 28' 19"} (current),
                 -34.804d {-34d 48' 14"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       0 [cnts]    Image_Peak=844 [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:        15549 TJD;   353 DOY;   10/12/19
GRB_TIME:        59273.51 SOD {16:27:53.51} UT
GRB_PHI:         131.36 [deg]
GRB_THETA:        44.42 [deg]
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.63 [sigma]
MERIT_PARAMS:     +1  +0  +0  +6  +1  -2  +0  +0  -3  +0 
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.28 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.90d {+04h 19m 36s}  +23.82d {+23d 49' 22"}
MOON_DIST:        76.68 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.78,-82.58 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      355.38,-36.13 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
COMMENTS:        probably due to it occurring during a Malindi downlink session.  
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 = 12.03,-10.80 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:46:08 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     440635,   Seg_Num: 0
GRB_RA:           12.2306d {+00h 48m 55.34s} (J2000),
                  12.3622d {+00h 49m 26.91s} (current),
                  11.6299d {+00h 46m 31.18s} (1950)
GRB_DEC:         -34.5662d {-34d 33' 58.3"} (J2000),
                 -34.5066d {-34d 30' 23.5"} (current),
                 -34.8386d {-34d 50' 18.9"} (1950)
GRB_ERROR:       5.6 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       9.68e-10 [erg/cm2/sec]
GRB_SIGNIF:      6.00 [sigma]
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59419.81 SOD {16:30:19.81} UT,   146.3 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.23 261.51 243.57
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.24 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.91d {+04h 19m 37s}  +23.82d {+23d 49' 24"}
MOON_DIST:        76.72 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.92,-82.54 [deg] galactic lon,lat of the burst
ECL_COORDS:      355.34,-36.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 2.43 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:46:19 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     440635,   Seg_Num: 0
GRB_RA:           12.2306d {+00h 48m 55.3s} (J2000),
                  12.3622d {+00h 49m 26.9s} (current),
                  11.6299d {+00h 46m 31.1s} (1950)
GRB_DEC:         -34.5662d {-34d 33' 58.3"} (J2000),
                 -34.5066d {-34d 30' 23.5"} (current),
                 -34.8386d {-34d 50' 18.9"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       36 [cnts]
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59419.81 SOD {16:30:19.81} UT,   146.3 [sec] since BAT Trigger Time
CENTROID_X:      256.71,  raw= 257  [pixels]
CENTROID_Y:      346.51,  raw= 347  [pixels]
ROLL:            242.56 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   114.35
GRB_POS_XRT_Z:   -107.46
IMAGE_URL:       sw00440635000msxps_rw.img
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.24 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.91d {+04h 19m 38s}  +23.82d {+23d 49' 24"}
MOON_DIST:        76.73 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.92,-82.54 [deg] galactic lon,lat of the burst
ECL_COORDS:      355.34,-36.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:46:52 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     440635,   Seg_Num: 0
GRB_RA:           12.257d {+00h 49m 02s} (J2000),
                  12.388d {+00h 49m 33s} (current),
                  11.656d {+00h 46m 37s} (1950)
GRB_DEC:         -34.532d {-34d 31' 53"} (J2000),
                 -34.472d {-34d 28' 19"} (current),
                 -34.804d {-34d 48' 14"} (1950)
GRB_DATE:        15549 TJD;   353 DOY;   10/12/19
GRB_TIME:        59273.51 SOD {16:27:53.51} UT
TRIGGER_INDEX:   20000
GRB_PHI:         131.36 [deg]
GRB_THETA:        44.42 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     64.000 [sec] 
SOLN_STATUS:     0x13
RATE_SIGNIF:     0.00 [sigma]
IMAGE_SIGNIF:    7.63 [sigma]
LC_URL:          sw00440635000msb.lc
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.28 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.91d {+04h 19m 39s}  +23.82d {+23d 49' 26"}
MOON_DIST:        76.69 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.78,-82.58 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      355.38,-36.13 [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 = 12.03,-10.80 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:47:15 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.245d {+00h 48m 59s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 24"} (J2000)
POINT_ROLL:      242.564d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59429.91 SOD {16:30:29.91} UT,   156.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.234
N_STARS:         88
X_OFFSET:        541 [pixels]
Y_OFFSET:        249 [pixels]
X_MAX:           1500 [pixels]
Y_MAX:           1208 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00440635000msufc0156.fits
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.92d {+04h 19m 40s}  +23.82d {+23d 49' 27"}
MOON_DIST:        76.69 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.86,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.38,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:46:24 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     440635,   Seg_Num: 0
GRB_RA:           12.2306d {+00h 48m 55.3s} (J2000),
                  12.3622d {+00h 49m 26.9s} (current),
                  11.6299d {+00h 46m 31.1s} (1950)
GRB_DEC:         -34.5662d {-34d 33' 58.3"} (J2000),
                 -34.5066d {-34d 30' 23.5"} (current),
                 -34.8386d {-34d 50' 18.9"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       36 [cnts]
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59419.81 SOD {16:30:19.81} UT,   146.3 [sec] since BAT Trigger Time
CENTROID_X:      256.71,  raw= 257  [pixels]
CENTROID_Y:      346.51,  raw= 347  [pixels]
ROLL:            242.56 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   114.35
GRB_POS_XRT_Z:   -107.46
IMAGE_URL:       sw00440635000msxps_rw.img
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.24 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.91d {+04h 19m 38s}  +23.82d {+23d 49' 24"}
MOON_DIST:        76.73 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.92,-82.54 [deg] galactic lon,lat of the burst
ECL_COORDS:      355.34,-36.15 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:47:37 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.245d {+00h 48m 59s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 24"} (J2000)
POINT_ROLL:      242.564d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59429.91 SOD {16:30:29.91} UT,   156.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.234
N_STARS:         88
X_OFFSET:        541 [pixels]
Y_OFFSET:        249 [pixels]
X_MAX:           1500 [pixels]
Y_MAX:           1208 [pixels]
DET_THRESH:      9
PHOTO_THRESH:    4
SL_URL:          sw00440635000msufc0156.fits
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.92d {+04h 19m 41s}  +23.82d {+23d 49' 28"}
MOON_DIST:        76.70 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.86,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.38,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:48:15 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.245d {+00h 48m 59s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 24"} (J2000)
ROLL:            242.564d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59429.91 SOD {16:30:29.91} UT,   156.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     314469036
X_OFFSET:        861 [pixels]
Y_OFFSET:        569 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1021
Y_GRB_POS:       729
BINNING_INDEX:   1
IM_URL:          sw00440635000msuni0163.fits
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.93d {+04h 19m 43s}  +23.82d {+23d 49' 30"}
MOON_DIST:        76.70 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.86,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.38,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:48:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.245d {+00h 48m 59s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 24"} (J2000)
ROLL:            242.564d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59429.91 SOD {16:30:29.91} UT,   156.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     314469036
X_OFFSET:        861 [pixels]
Y_OFFSET:        569 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1021
Y_GRB_POS:       729
BINNING_INDEX:   1
IM_URL:          sw00440635000msuni0163.fits
SUN_POSTN:       267.46d {+17h 49m 51s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.93d {+04h 19m 43s}  +23.83d {+23d 49' 31"}
MOON_DIST:        76.70 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.86,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.38,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:51:42 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.243d {+00h 48m 58s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 25"} (J2000)
POINT_ROLL:      242.565d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59588.23 SOD {16:33:08.23} UT,   314.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.545
N_STARS:         33
X_OFFSET:        541 [pixels]
Y_OFFSET:        249 [pixels]
X_MAX:           1500 [pixels]
Y_MAX:           1208 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00440635000msufc0314.fits
SUN_POSTN:       267.47d {+17h 49m 52s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.96d {+04h 19m 51s}  +23.83d {+23d 49' 40"}
MOON_DIST:        76.73 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.87,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.37,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:52:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.243d {+00h 48m 58s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 25"} (J2000)
POINT_ROLL:      242.565d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59588.23 SOD {16:33:08.23} UT,   314.7 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.545
N_STARS:         33
X_OFFSET:        541 [pixels]
Y_OFFSET:        249 [pixels]
X_MAX:           1500 [pixels]
Y_MAX:           1208 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00440635000msufc0314.fits
SUN_POSTN:       267.47d {+17h 49m 52s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.97d {+04h 19m 52s}  +23.83d {+23d 49' 41"}
MOON_DIST:        76.73 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.87,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.37,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:52:56 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.243d {+00h 48m 58s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 25"} (J2000)
ROLL:            242.565d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59588.23 SOD {16:33:08.23} UT,   314.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     314469194
X_OFFSET:        861 [pixels]
Y_OFFSET:        569 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1021
Y_GRB_POS:       729
BINNING_INDEX:   1
IM_URL:          sw00440635000msuni0321.fits
SUN_POSTN:       267.47d {+17h 49m 52s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.97d {+04h 19m 54s}  +23.83d {+23d 49' 43"}
MOON_DIST:        76.73 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.87,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.37,-36.12 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 16:53:01 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     440635,   Seg_Num: 0
POINT_RA:         12.243d {+00h 48m 58s} (J2000)
POINT_DEC:       -34.524d {-34d 31' 25"} (J2000)
ROLL:            242.565d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59588.23 SOD {16:33:08.23} UT,   314.7 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     314469194
X_OFFSET:        861 [pixels]
Y_OFFSET:        569 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       1021
Y_GRB_POS:       729
BINNING_INDEX:   1
IM_URL:          sw00440635000msuni0321.fits
SUN_POSTN:       267.47d {+17h 49m 52s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.27 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.98d {+04h 19m 54s}  +23.83d {+23d 49' 43"}
MOON_DIST:        76.74 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.87,-82.59 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      355.37,-36.12 [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:     Sun 19 Dec 10 16:54:55 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     440635,   Seg_Num: 0
GRB_RA:           12.2306d {+00h 48m 55.34s} (J2000),
                  12.3622d {+00h 49m 26.91s} (current),
                  11.6299d {+00h 46m 31.18s} (1950)
GRB_DEC:         -34.5664d {-34d 33' 59.0"} (J2000),
                 -34.5068d {-34d 30' 24.3"} (current),
                 -34.8388d {-34d 50' 19.6"} (1950)
GRB_ERROR:       0.6 [arcsec radius, statistical only]
GRB_MAG:         17.84 +/- 0.14 [mag]
FILTER:          10, White
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  59434.00 SOD {16:30:34.00} UT,   160.5 [sec] since BAT Trigger Time
SUN_POSTN:       267.47d {+17h 49m 52s}  -23.42d {-23d 25' 00"}
SUN_DIST:         88.24 [deg]   Sun_angle= -7.0 [hr] (East of Sun)
MOON_POSTN:       64.99d {+04h 19m 59s}  +23.83d {+23d 49' 49"}
MOON_DIST:        76.78 [deg]
MOON_ILLUM:      97 [%]
GAL_COORDS:      306.92,-82.54 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      355.34,-36.15 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The UVOT position is 0.7 arcsec from the XRT position.

GCN Circular #11473
J. M. Gelbord (PSU), S. D. Barthelmy (GSFC), D. N. Burrows (PSU), M. M. Chester (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 16:27:53 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 101219B (trigger=440635). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 12.257, -34.532 which is
```
   RA(J2000)  =  00h 49m 02s
   Dec(J2000) = -34d 31' 53"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This is an image trigger so as is typical, the BAT lightcurve does not show anything.
The XRT began observing the field at 16:30:19.8 UT, 146.3 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 12.2306, -34.5662 which is equivalent to:
```
   RA(J2000)  = 00h 48m 55.34s
   Dec(J2000) = -34d 33' 58.3"
```
with an uncertainty of 5.6 arcseconds (radius, 90% containment). This location is 145 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
UVOT took a finding chart exposure of 150 seconds with the White filter starting 156 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image at
```
  RA(J2000)  =	00:48:55.35 =  12.23061
  DEC(J2000) = -34:33:59.5  = -34.56652
```
with a 90%-confidence error radius of about 0.62 arc sec. This position is 1.2 arc sec. from the center of the XRT error circle. The estimated magnitude is 17.84 with a 1-sigma error of about 0.14. No correction has been made for the expected extinction corresponding to E(B-V) of 0.02.
Burst Advocate for this burst is J. M. Gelbord (jgelbord 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 #11475
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), N. Gehrels (GSFC), J. M. Gelbord (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+766 sec from recent telemetry downlinks, we report further analysis of BAT GRB 101219B (trigger #440635) (Gelbord, et al., GCN Circ. 11473). The BAT ground-calculated position is RA, Dec = 12.259, -34.556 deg which is
```
   RA(J2000)  =  00h 49m 01.9s 
   Dec(J2000) = -34d 33' 21.6" 
```
with an uncertainty of 3.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 7%.
The mask-weighted light curve shows a broad peak starting at ~T+20 sec and ending at ~T+60 sec. However, given that there was a pre-planned slew ending just before T_zero, we can not rule out that was actvitity before this source came into the BAT FoV. T90 (15-350 keV) is 34 +- 5 sec (estimated error including systematics).
The time-averaged spectrum from T+10 to T+60 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.56 +- 0.16. The fluence in the 15-150 keV band is 2.1 +- 0.4 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+26.84 sec in the 15-150 keV band is 0.6 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
GCN Circular #11477
A.J. van der Horst (USRA) reports on behalf of the Fermi GBM Team:
"At 16:28:13.12 UT on 19 December 2010, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 101219B (trigger 314468895 / 101219686), which was also detected by the Swift/BAT (GCN 11473). The GBM on-ground location is consistent with the Swift position. The angle from the Fermi LAT boresight is 59 degrees.
The GBM light curve consists of one peak with a duration (T90) of 51 +/- 2 s (50-300 keV). The time-averaged spectrum from T0-4.1 s to T0+47.1 s is best fit by a Band function with Epeak = 70 +/- 8 keV, alpha = 0.33 +/- 0.36, and beta = -2.12 +/- 0.12. The event fluence (10-1000 keV) in this time interval is (5.5 +/- 0.4)E-6 erg/cm^2. The 1-sec peak photon flux measured starting from T0+5.6 s in the 10-1000 keV band is 2.0 +/- 0.2 ph/s/cm^2.
The temporal and spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #11478
F. Olivares E. (MPE Garching), A. Rossi (TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 101219B (Swift trigger 440635; Gelbord et al., GCN #11473) 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 La Silla Observatory (Chile).
Observations started during twilight at 00:33 UT on December 20, 8.1 hours after the GRB trigger, and were performed at an average seeing of 1" and an average airmass of 1.05.
We confirm the optical afterglow candidate reported by Gelbord et al. (GCN #11473). The afterglow faded, however, it is well detected in all seven GROND optical/NIR bands.
Based on 141 s of total exposure in g'r'i'z' and 240 s in JHK, taken at 00:36 UT mid-time, we estimate preliminary magnitudes (all in the AB system) of:
```
g' = 20.4 +/- 0.1
r' = 20.0 +/- 0.1
i' = 20.0 +/- 0.2
z' = 19.6 +/- 0.1
J  = 19.2 +/- 0.1
H  = 18.8 +/- 0.1 and
K  = 18.6 +/- 0.1
```
A second epoch was obtained at 03:10 UT mid-time, with total exposure time of 1500 s in in g'r'i'z' and 1200 s seconds in JHK. The afterglow has faded by ~0.3 mag in the r' and J bands, which yields a temporal decay index of alpha = 1.0 between our two epochs.
Given magnitudes are calibrated against GROND zero points and 2MASS field stars. The error in the optical bands is dominated by the zero-point uncertainty. Magnitudes are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E(B-V)=0.02 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #11480
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 2429 s of XRT Photon Counting mode data and 4 UVOT images for GRB 101219B, 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 = 12.23064, -34.56688 which is equivalent to:
```
RA (J2000): 00h 48m 55.35s
Dec (J2000): -34d 34' 00.8"
```
with an uncertainty of 1.6 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 #11481
J.M. Gelbord (PSU) reports on behalf of the Swift-XRT team:
We have analysed 17 ks of XRT data for GRB 101219B (Gelbord et al. GCN Circ. 11473), from 136 s to 65.2 ks after the BAT trigger. The data comprise 415 s in Windowed Timing (WT) mode (the first 9 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 11480).
The light curve (from T0+425 s) can be modelled with a series of power-law decays. The decay from T+425 s is steep, with an index of alpha=4.16 (+2.3, -0.50). At T+638 s the decay flattens to an alpha of 2.35 (+0.31, -0.46). Another break at T+4.7 ks is followed by a flatter decay of alpha = 0.23 (+/-0.15).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.68 (+/- 0.04). The best-fitting absorption column is consistent with the Galactic value of 3.14 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 1.69 (+0.12, -0.11) and a best-fitting absorption column consistent with the Galactic value. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.1 x 10^-11 (4.3 x 10^-11) erg cm^-2 count^-1.
```
A summary of the PC-mode spectrum is thus:
Total column:	     3.1 (+0.9, -3.1) x 10^20 cm^-2
Galactic foreground: 3.14 x 10^20 cm^-2
Excess significance: <1.6 sigma
Photon index:	     1.69 (+0.12, -0.11)
```
If the light curve continues to decay with a power-law decay index of 0.23, the count rate at T+24 hours will be 0.0060 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 1.2 x 10^-13 (1.3 x 10^-13) erg cm^-2 s^-1. The count rate at T+48 hours would be 0.0051 count s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00440635.
This circular is an official product of the Swift-XRT team.

GCN Circular #11482
N.P.M. Kuin (MSSL/UCL) and J.M. Gelbord (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 101219B 156 s after the BAT trigger (Gelbord et al., GCN Circ. 11473). The optical afterglow is at 7 arcsec distance of a 16th magnitude star. Special care has been taken to subtract the estimated contribution of the neghboring star. The data suggest that after an initial brightening, there was a dimming around T+550s followed by a second brightening.
Preliminary magnitudes of the GRB, using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and some selected subsequent exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)      Mag   Mag_err

white_FC           156          306        147.4       17.87   0.06
white              768          788         19.5       17.59   0.10
white             6686         6886        196.6       18.58   0.06
v                  820          840         19.5       17.55   0.27
v                 7097         7296        196.6       18.39   0.15
b                  570          590         19.5       18.79   0.30
b                  744          764         19.4       18.00   0.19
u                  718          738         19.5       17.25   0.18
u                 1298         1318         19.5       17.26   0.18
uvw1              1446         1465         19.4       17.43   0.28
uvw1             16352        16861        501         18.40   0.11
uvm2              7301         7392         89.6       18.15   0.24
uvm2             51175        52075        856         19.54   0.16
uvw2              6892         7092        197         18.04   0.13
uvw2             56901        57801        886         20.21   0.20

The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).

GCN Circular #11516
N.P.M. Kuin (MSSL/UCL) and J.M. Gelbord (PSU) report on behalf of the Swift/UVOT team:
As reported earlier (Gelbord et al., GCN Circ. 11473; Kuin et al., GCN Circ. 11482), Swift/UVOT observations of GRB 101219B detected an optical afterglow in all its bands with initial magnitudes of about 18 mag. The optical afterglow has been unusually slow to decay, and is around 23 mag at present in the u and uv bands. The UVOT has obtained a good light curve in all bands up to about 300ks, with continuing detections through 1000ks in u, uvw1, uvm2, and uvw2 (v and b measurements after 300ks are significantly affected by the PSF wings of a B = 15.5 mag star located 7 arcsec to the SW). The light curve still appears to be decaying and there is some indication that this decay may not be smooth.
GRB 101219B is further interesting because the UVOT light curve exhibits an early decay to about 600 seconds after the trigger time T, after which a second brightness rise to a maximum around T+850s occurs. A corresponding break is found in the X-ray light curve, in that the decay observed by XRT flattens approximately at T+700s.
The only constraint on the redshift of this burst is an upper limit around 1.5 implied by the detection in uvw2, as there have not been any spectroscopic observations announced to date. However, if this burst is bright because it is close, then we might detect a supernova bump in the coming days.
We consider this an interesting burst and would like to bring this to the attention of the community as an opportunity for further observations.
GCN Circular #11549
Dale A. Frail (NRAO) reports on behalf of a larger collaboration:
"We responded to a request (GCN#11516) for further observations of the long-lived optical afterglow of GRB 101219B. The Expanded Very Large Array (EVLA) observed a field toward this GRB (GCN#s 11473, 11482) on 2011 January 7.03 UT at a center frequency of 8.46 GHz.
In a preliminary reduction of the data, we detect a weak radio source (Flux=71+/-15 uJy) at RA(J2000)=00:48:55.40 (+/-0.01) and Dec(J2000)=-34:34:00.1 (+/-0.7) that may be the afterglow of GRB 101219B.
No further observations are planned.
GCN Circular #11575
N.P.M. Kuin (MSSL/UCL) and J.M. Gelbord (PSU) report on behalf of the Swift/UVOT team:
Observations of GRB 101219B from 0.86Ms to 2.45Ms after the BAT trigger (T) continued in the u and uvw2 filter. The uvw2 light curve has been flat since T+1Ms. The late time uvw2 image obtained by summing the late time data in uvw2 shows that the likely host is offset from the GRB position by 1.2" with an estimated distance error (90% confidence) of 0.5".
The host position is:
```
RA = 00h 48m 54.37s
Dec = -34d 33m 58.3s (J2000),
```
which is (12.23069, -34.56620) in decimal degrees.
The host magnitude is uvw2 = 23.4 +/- 0.3, which corresponds to a flux density at 1.477 x 10^15 Hz of (3.4 +/- 1.0)x10^(-4) mJy. In the u band (1.477 x 10^15 Hz) the observations terminated earlier than the in the uvw2. However, the u band data obtained between T+0.86Ms and T+1.8Ms give a 3-sigma upper limit of u > 23.3 with a corresponding flux density < 6.4 x 10^(-4) mJy.
Observation in the uvw2 filter limits the redshift z < 1.4.
GCN Circular #11576
N.P.M. Kuin (MSSL/UCL) reports on behalf of the Swift/UVOT Team
A typographical error slipped into the sexagesimal position given for the possible host in GCN 11575. The position should read:
```
RA = 00h 48m 55.37s
DEC = -34d 33m 58.3s (J2000)
```
The position given in degrees was correct.
Thanks go to Daniele Malesani for pointing this out.
GCN Circular #11578
F. Olivares E., P. Schady, T. Kruehler, J. Greiner (all MPE Garching), S. Klose, and D. A. Kann (Tautenburg Observatory) report on behalf of the GROND team:
GROND continues to observe the field of the Swift GRB 101219B (Gelbord et al., GCN #11473) simultaneously in g'r'i'z'JHK. The light curve of the optical transient associated with this GRB (Olivares E. et al., GCN #11478, Kuin & Gelbord, GCNs 11482, 11516, 11575, 11576) started as a single power-law decay, but flattens at around day five at a preliminary AB magnitude of r' ~ 22.7. In addition there is a clear color change associated with the flattening.
Starting at day 15, the light curve again decreases in all optical bands to a magnitude of r' ~ 23.7 at 27 days after the burst. This light curve shape is typical for GRB/SN events (e.g., Zeh et al. 2004, ApJ, 609, 952), and we hence interpret these observational features as signatures of an emerging and decaying supernova underlying the afterglow emission of GRB 101219B.
Assuming a luminosity equal to that of SN 1998bw for the SN component, as well as negligible dust extinction along the line of sight, a conservative redshift range of 0.4 < z < 0.7 is derived for GRB 101219B. We note that the peak time rather short (around 14 days after burst, see Ferrero et al. 2006, A&A, 457, 857), which further suggests a low redshift for this GRB.
We stress that at this stage, a possible host contribution and the SN component cannot be accurately disentangled and all results should be considered preliminary.
Photometric and in particular spectroscopic observations with larger aperture telescopes aiming at the detection of the fading SN and/or host galaxy are highly encouraged.
GCN Circular #11579
Antonio de Ugarte Postigo (DARK/NBI), Paolo Goldoni (APC/Univ. Paris 7 and SAp/CEA), Bo Milvang-Jensen, Daniele Malesani, Martin Sparre, Johan P.U. Fynbo, Giorgos Leloudas (DARK/NBI), Stefano Covino (INAF/OABr), Hector Flores (GEPI/Obs. de Paris), Valerio D'Elia (ASI/ASDC and INAF/Roma), Andrew Levan (Univ. Warwick), report on behalf of the X-shooter GTO GRB collaboration:
We observed the afterglow of GRB 101219B (Gelbord et al., GCN 11473) with the X-shooter spectrograph mounted on the ESO-VLT UT2. Observations were taken on two epochs, 2010 Dec 20.17 and 2011 Jan 5.09 UT (11.6 hr and 16.4 days after the burst, respectively). Exposure times were 80 and 120 min, respectively.
In the first-epoch spectrum, the afterglow is detected over the full spectral range from about 3200 to 22,000 AA. A careful analysis provides a tentative redshift z=0.5519 based on detection of weak Mg II and Mg I. No other clear features can be found at the same redshift either in absorption or emission.
The second-epoch spectrum was taken 16.4 days after the GRB, which corresponds to 10.6 days in the rest frame at z=0.55. The continuum is again detected, over the wavelength range 3500 to 22,000 AA, and is substantially redder. No narrow emission lines can be distinguished, but broad SN-like undulations are apparent, particularly around 8000 AA. We carried out a comparison of our spectrum with those of SN 1998bw (Patat et al. 2001, ApJ, 555, 900) transformed at various redshifts. We find a convincing match at z~0.55 after comparing with a spectrum taken on 1998 May 4 (i.e., 12 days after the GRB). The observed flux is consistent assuming a roughly equal contribution from a SN as bright as SN 1998bw and an underlying host galaxy. The match of the spectral shape, brightness, and spectral epoch together strenghten both the redshift determination and the existence of a SN associated with GRB 101219B.
Our findings are in good agreement with the GROND observations reported by Olivares et al. (GCN 11578).
Further observations are planned. We acknowledge the assistence of the ESO observing staff at Paranal, in particular Dimitri Gadotti, Leonel Rivas, Thomas Rivinius, Maja Vuckovic, and Thomas Szeifert.
1105.0422 from 4 May 11
M. Sparre et al.: Spectroscopic evidence for SN 2010ma associated with GRB 101219B
We report on the spectroscopic detection of supernova SN 2010ma associated with the long gamma-ray burst GRB 101219B. We observed the optical counterpart of the GRB on three nights with the X-shooter spectrograph at the VLT. From weak absorption lines, we measure a redshift of z=0.55. The first epoch UV--near-infrared afterglow spectrum, taken 11.6 hr after the burst, is well fit by a power law consistent with the slope of the X-ray spectrum. The second and third epoch spectra (obtained 16.4 and 36.7 days after the burst), however, display clear bumps closely resembling those of the broad-lined type-Ic SN 1998bw if placed at z=0.55. Apart from demonstrating that spectroscopic SN signatures can be observed for GRBs at these large distances, our discovery makes a step forward in establishing a general connection between GRBs and SNe. In fact, unlike most previous unambiguous GRB-associated SNe, GRB 101219B has a large gamma-ray energy ($E_{\rm iso}= 4.2 \times 10^{51}$ erg), a bright afterglow, and obeys the "Amati" relation, thus being fully consistent with the cosmological population of GRBs.
1511.02800 from 10 Nov 15
Tong Liu et al.: A method to constrain mass and spin of GRB black hole central engine within the NDAF $n\barn$-annihilation model and application to GRB
101219B Black holes (BHs) hide themselves behind various astronomical phenomena, and their properties, i.e., mass and spin, are usually difficult to constrain. One leading candidate for the central engine model of gamma-ray bursts (GRBs) invokes a stellar mass BH and a neutrino-dominated accretion flow (NDAF), with the relativistic jet launched due to neutrino-anti-neutrino ($\nu \bar\nu$) annihilations. Such a model gives rise to a matter-dominated fireball, and is suitable to interpret GRBs with a dominant thermal component with a photospheric origin. We propose a method to constrain BH mass and spin within the framework of this model, and apply the method to a thermally-dominant GRB 101219B whose initial jet launching radius $r_0$ is constrained from the data. Using our numerical model of NDAF jets, we obtain the following constraints on the central BH: mass $M_{\rm BH} \sim 5-9~M_\odot$, spin parameter $a_* \gtrsim 0.6$, and disk mass $3~M_\odot \lesssim M_{\rm disk} \lesssim 4~M_\odot$.

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