Gamma-ray Burst 101219A

(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 02:31:42 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     440606,   Seg_Num: 0
GRB_RA:           74.616d {+04h 58m 28s} (J2000),
                  74.754d {+04h 59m 01s} (current),
                  73.987d {+04h 55m 57s} (1950)
GRB_DEC:          -2.534d {-02d 32' 01"} (J2000),
                  -2.518d {-02d 31' 03"} (current),
                  -2.609d {-02d 36' 33"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1416 [cnts]    Image_Peak=158 [image_cnts]
TRIGGER_DUR:     0.064 [sec] 
TRIGGER_INDEX:   10427     E_range: 50-350 keV
BKG_INTEN:       18926 [cnts]
BKG_TIME:        9073.52 SOD {02:31:13.52} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15549 TJD;   353 DOY;   10/12/19
GRB_TIME:        9089.52 SOD {02:31:29.52} UT
GRB_PHI:          32.94 [deg]
GRB_THETA:        14.30 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     102.94 [sigma]
IMAGE_SIGNIF:    11.15 [sigma]
MERIT_PARAMS:     +1  +0  +0  -4  +3  +1  +0  +0 +87  +0 
SUN_POSTN:       266.80d {+17h 47m 13s}  -23.40d {-23d 24' 16"}
SUN_DIST:        151.54 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.47d {+03h 45m 53s}  +22.91d {+22d 54' 41"}
MOON_DIST:        31.06 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.61,-26.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       72.99,-25.07 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 331.12,19.89 [deg].

red DSS finding chart ps-file

GCN NOTICE

 
TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Sun 19 Dec 10 02:32:15 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    6112,   Sub_Num: 0
GRB_INTEN:      14.60 [sigma]  
GRB_TIME:       9087.99 SOD {02:31:27.99} UT
GRB_DATE:       15549 TJD;   353 DOY;   10/12/19
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:
COMMENTS:       NOTE: This SPIACS event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=440606).
COMMENTS:
COMMENTS:       The SPIACS lightcurve can be found at:
COMMENTS:
ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2010-12/2010-12-19T02-31-27.8716-03735-00007-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 02:32:41 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.615d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.545d {-02d 32' 40"} (J2000)
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9150.00 SOD {02:32:30.00} UT,   60.5 [sec] since BAT Trigger Time
COUNTS:          10    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:     Sun 19 Dec 10 02:35:11 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     440606,   Seg_Num: 0
GRB_RA:           74.616d {+04h 58m 28s} (J2000),
                  74.754d {+04h 59m 01s} (current),
                  73.987d {+04h 55m 57s} (1950)
GRB_DEC:          -2.534d {-02d 32' 01"} (J2000),
                  -2.518d {-02d 31' 03"} (current),
                  -2.609d {-02d 36' 33"} (1950)
GRB_DATE:        15549 TJD;   353 DOY;   10/12/19
GRB_TIME:        9089.75 SOD {02:31:29.75} UT
TRIGGER_INDEX:   10427
GRB_PHI:          32.94 [deg]
GRB_THETA:        14.30 [deg]
DELTA_TIME:      -22.00 [sec]
TRIGGER_DUR:     0.064 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     102.94 [sigma]
IMAGE_SIGNIF:    11.15 [sigma]
LC_URL:          sw00440606000msb.lc
SUN_POSTN:       266.81d {+17h 47m 13s}  -23.40d {-23d 24' 17"}
SUN_DIST:        151.54 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.51d {+03h 46m 01s}  +22.92d {+22d 54' 57"}
MOON_DIST:        31.04 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.61,-26.16 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       72.99,-25.07 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 331.12,19.89 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 02:37:06 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.616d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.545d {-02d 32' 41"} (J2000)
ROLL:            203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9156.37 SOD {02:32:36.37} UT,   66.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     314418762
X_OFFSET:        743 [pixels]
Y_OFFSET:        954 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1114
BINNING_INDEX:   1
IM_URL:          sw00440606000msuni0073.fits
SUN_POSTN:       266.81d {+17h 47m 14s}  -23.40d {-23d 24' 17"}
SUN_DIST:        151.53 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.52d {+03h 46m 06s}  +22.92d {+22d 55' 06"}
MOON_DIST:        31.04 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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:     Sun 19 Dec 10 02:37:25 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.616d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.545d {-02d 32' 41"} (J2000)
ROLL:            203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9156.37 SOD {02:32:36.37} UT,   66.9 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     314418762
X_OFFSET:        743 [pixels]
Y_OFFSET:        954 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1114
BINNING_INDEX:   1
IM_URL:          sw00440606000msuni0073.fits
SUN_POSTN:       266.81d {+17h 47m 14s}  -23.40d {-23d 24' 17"}
SUN_DIST:        151.53 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.53d {+03h 46m 07s}  +22.92d {+22d 55' 08"}
MOON_DIST:        31.04 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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:     Sun 19 Dec 10 02:43:18 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
POINT_ROLL:      203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9368.15 SOD {02:36:08.15} UT,   278.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.677
N_STARS:         79
X_OFFSET:        184 [pixels]
Y_OFFSET:        395 [pixels]
X_MAX:           1623 [pixels]
Y_MAX:           1834 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00440606000msufc0278.fits
SUN_POSTN:       266.81d {+17h 47m 15s}  -23.41d {-23d 24' 17"}
SUN_DIST:        151.53 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.58d {+03h 46m 20s}  +22.93d {+22d 55' 36"}
MOON_DIST:        31.02 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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 02:43:39 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
POINT_ROLL:      203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9368.15 SOD {02:36:08.15} UT,   278.6 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.677
N_STARS:         79
X_OFFSET:        184 [pixels]
Y_OFFSET:        395 [pixels]
X_MAX:           1623 [pixels]
Y_MAX:           1834 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00440606000msufc0278.fits
SUN_POSTN:       266.81d {+17h 47m 15s}  -23.41d {-23d 24' 17"}
SUN_DIST:        151.53 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.59d {+03h 46m 21s}  +22.93d {+22d 55' 37"}
MOON_DIST:        31.01 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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 02:44:42 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
ROLL:            203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9368.15 SOD {02:36:08.15} UT,   278.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     314418974
X_OFFSET:        743 [pixels]
Y_OFFSET:        954 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1114
BINNING_INDEX:   1
IM_URL:          sw00440606000msuni0285.fits
SUN_POSTN:       266.81d {+17h 47m 15s}  -23.41d {-23d 24' 17"}
SUN_DIST:        151.53 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.60d {+03h 46m 24s}  +22.93d {+22d 55' 42"}
MOON_DIST:        31.01 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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:     Sun 19 Dec 10 02:44:49 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     440606,   Seg_Num: 0
GRB_RA:           74.5862d {+04h 58m 20.68s} (J2000),
                  74.7241d {+04h 58m 53.77s} (current),
                  73.9577d {+04h 55m 49.85s} (1950)
GRB_DEC:          -2.5384d {-02d 32' 18.2"} (J2000),
                  -2.5222d {-02d 31' 20.0"} (current),
                  -2.6139d {-02d 36' 49.9"} (1950)
GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      5.00 [sigma]
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9150.00 SOD {02:32:30.00} UT,   60.5 [sec] since BAT Trigger Time
TAM[0-3]:        327.61 237.19 261.35 242.66
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       266.81d {+17h 47m 15s}  -23.41d {-23d 24' 17"}
SUN_DIST:        151.52 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.60d {+03h 46m 24s}  +22.93d {+22d 55' 43"}
MOON_DIST:        30.99 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.60,-26.19 [deg] galactic lon,lat of the burst
ECL_COORDS:       72.95,-25.07 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        TAM values are not valid.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 02:44:57 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
ROLL:            203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9368.15 SOD {02:36:08.15} UT,   278.6 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     314418974
X_OFFSET:        743 [pixels]
Y_OFFSET:        954 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1114
BINNING_INDEX:   1
IM_URL:          sw00440606000msuni0285.fits
SUN_POSTN:       266.81d {+17h 47m 15s}  -23.41d {-23d 24' 17"}
SUN_DIST:        151.53 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.60d {+03h 46m 24s}  +22.93d {+22d 55' 43"}
MOON_DIST:        31.01 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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 #11461
J. M. Gelbord (PSU), S. D. Barthelmy (GSFC), M. M. Chester (PSU), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), D. Grupe (PSU), E. A. Hoversten (PSU), J. A. Kennea (PSU), F. E. Marshall (NASA/GSFC), D. M. Palmer (LANL), C. J. Saxton (UCL-MSSL) and M. H. Siegel (PSU) report on behalf of the Swift Team:
At 02:31:29 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 101219A (trigger=440606). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 74.616, -2.534 which is
```
   RA(J2000)  =  04h 58m 28s
   Dec(J2000) = -02d 32' 01"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single spike with a duration of about 0.3 sec. The peak count rate was ~24000 counts/sec (15-350 keV), at 0.0 sec after the trigger.
The XRT began observing the field at 02:32:30.0 UT, 60.5 seconds after the BAT trigger. Using promptly downlinked data we find a fading, uncatalogued X-ray source with an enhanced position: RA, Dec 74.5854, -2.5395 which is equivalent to:
```
   RA(J2000)  = 04h 58m 20.49s
   Dec(J2000) = -02d 32' 22.4"
```
with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 111 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (4.87 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 2.8 (+1.83/-1.57) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 250 seconds with the U filter starting 278 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 none of the XRT error circle. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18.0 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.06.
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 NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Sun 19 Dec 10 03:01:51 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
POINT_ROLL:      203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9946.75 SOD {02:45:46.75} UT,   857.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.328
N_STARS:         106
X_OFFSET:        184 [pixels]
Y_OFFSET:        395 [pixels]
X_MAX:           1623 [pixels]
Y_MAX:           1834 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00440606000msufc0857.fits
SUN_POSTN:       266.83d {+17h 47m 18s}  -23.41d {-23d 24' 18"}
SUN_DIST:        151.52 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.76d {+03h 47m 04s}  +22.95d {+22d 57' 03"}
MOON_DIST:        30.94 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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 03:02:15 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
POINT_ROLL:      203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9946.75 SOD {02:45:46.75} UT,   857.2 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.328
N_STARS:         106
X_OFFSET:        184 [pixels]
Y_OFFSET:        395 [pixels]
X_MAX:           1623 [pixels]
Y_MAX:           1834 [pixels]
DET_THRESH:      10
PHOTO_THRESH:    5
SL_URL:          sw00440606000msufc0857.fits
SUN_POSTN:       266.83d {+17h 47m 18s}  -23.41d {-23d 24' 18"}
SUN_DIST:        151.52 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.77d {+03h 47m 05s}  +22.95d {+22d 57' 05"}
MOON_DIST:        30.93 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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 03:03:17 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
ROLL:            203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9946.75 SOD {02:45:46.75} UT,   857.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     314419553
X_OFFSET:        743 [pixels]
Y_OFFSET:        954 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1114
BINNING_INDEX:   1
IM_URL:          sw00440606000msuni0864.fits
SUN_POSTN:       266.83d {+17h 47m 19s}  -23.41d {-23d 24' 18"}
SUN_DIST:        151.52 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.78d {+03h 47m 07s}  +22.95d {+22d 57' 10"}
MOON_DIST:        30.93 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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:     Sun 19 Dec 10 03:03:02 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     440606,   Seg_Num: 0
POINT_RA:         74.617d {+04h 58m 28s} (J2000)
POINT_DEC:        -2.547d {-02d 32' 49"} (J2000)
ROLL:            203.942d
IMG_START_DATE:  15549 TJD;   353 DOY;   10/12/19
IMG_START_TIME:  9946.75 SOD {02:45:46.75} UT,   857.2 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     314419553
X_OFFSET:        743 [pixels]
Y_OFFSET:        954 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       903
Y_GRB_POS:       1114
BINNING_INDEX:   1
IM_URL:          sw00440606000msuni0864.fits
SUN_POSTN:       266.83d {+17h 47m 19s}  -23.41d {-23d 24' 18"}
SUN_DIST:        151.52 [deg]   Sun_angle= -11.2 [hr] (East of Sun)
MOON_POSTN:       56.78d {+03h 47m 06s}  +22.95d {+22d 57' 09"}
MOON_DIST:        30.93 [deg]
MOON_ILLUM:      94 [%]
GAL_COORDS:      201.62,-26.17 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:       72.99,-25.08 [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 Circular #11462
S. B. Pandey (U Mich), W. Zheng (U Mich) and W. Rujopakarn (Steward), report on behalf of the ROTSE collaboration:
ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, responded to GRB 101219A (Swift trigger 440606; Gelbord J. M., GCN 11461), producing images beginning 8.1 s after the GCN notice time. An automated response took the first image at 02:31:48.0 UT, 12.0 s after the burst, under fair conditions. We took 10 5-sec, 10 20-sec and 10 60-sec exposures. These unfiltered images are calibrated relative to USNO A2.0 (R). Imaging is on going.
Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma Swift/BAT error circle or the XRT error circle, for both single images and coadding into sets of 10. Individual images have limiting magnitudes ranging from 15.7-17.2; we set the following specific limits.
```
start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
--------------------------------------------------------------------
02:31:48.0   02:31:53.0         5     15.7           12.0       N
02:31:48.0   02:33:04.1        76     17.2           90.0       Y
```
GCN Circular #11463
S. Covino (INAF/Brera) and E. Palazzi (IASF-Bo) on behalf of the REM team report:
The robotic 60-cm REM telescope located at La Silla (Chile) observed automatically the field of GRB 101219A (Gelbord et al. GCN 11461) with the ROSS optical and REMIR near-infrared cameras in imaging mode.
The first observations have been performed within about 30s from the GRB time. No counterpart down to the 2MASS limit could be singled out in the XRT error circle in the NIR frames, while the proximity of the bright Moon (~30 deg) prevented deep optical observations.
Further observations are in progress.
GCN Circular #11464
D. A. Perley (UC Berkeley), E. Berger (Harvard), S.B. Cenko (UC Berkeley), R. Chornock (Harvard), A. J. Levan (Warwick), N. Tanvir (Leicester) report:
We observed the position of GRB 101219A (Gelbord et al., GCN 11461) with GMOS-S on the Gemini South telescope in the i-band starting at 2010 Dec 19 13:14:04 UT (43 min after the burst). In a stack of the first five 180-sec exposures we detect a faint object within the XRT error circle (GCN #11461) at coordinates (J2000):
```
RA = 04:58:20.478
DEC = -02:32:22.17
```
The object is also weakly detected in a single r-band frame, and appears to be mildly extended in the i-band images. Further observations and analysis are underway.
GCN Circular #11465
Adria C. Updike (CRESST/UMD/NASA GSFC), Dieter H. Hartmann (Clemson University), and Martha A. Leake (Valdosta State University) report:
We observed the field of GRB 101219A (Gelbord et al., GCN 11461) with the SARA-North 0.9m telescope at KPNO beginning 38 minutes after the trigger under good conditions and high airmass. We do not detect the afterglow candidate (Perley et al., GCN 11464) down to a limiting magnitude of 19.5 in the R band (420 seconds of exposure beginning 38 minutes after trigger) and 18.6 in the I band (300 seconds of exposure beginning 45 minutes after trigger) as compared to the USNO B1.0 catalog. This message may be cited.
GCN Circular #11466
S. Schulze (U Iceland), D. Malesani (DARK Cosmology Centre), D. Xu (Weizmann Institute) I. Ilyin (AIP Potsdam), P. Jakobsson (U Iceland) on behalf of a larger collaboration report:
We observed the field of GRB 101219A (Gelbord et al., GCN 11461) with StanCAM mounted on the NOT telescope on La Palma, Canary Islands (Spain) starting at 3:34 UT (~1 hour after the trigger) and ending 4:01:21 UT.
We took seven images in R band with an exposure time of 150 seconds each. The stacked image does not reveal any new source within the XRT error circle (Gelbord et al., GCN 11461), and in particular at the location of the optical object identified by Perley et al. (GCN 11464).
We derive a limiting magnitude of 21 in R-band calibrated against USNO stars with a mid-exposure time of 1.27 hours after the trigger.
GCN Circular #11467
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), J. M. Gelbord (PSU), 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-60 to T+243 sec from the recent telemetry downlink, we report further analysis of the BAT short hard burst GRB 101219A (trigger #440606) (Gelbord, et al., GCN Circ. 11461). The BAT ground-calculated position is RA, Dec = 74.586, -2.527 deg which is
```
   RA(J2000)  =  04h 58m 20.7s 
   Dec(J2000) = -02d 31' 37.1" 
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 94%.
The mask-weighted light curve shows two overlapping peaks starting at ~T-0.1 sec and ending at ~T+0.6 sec. At the 2-sigma confidence level, there may be extended emission out to T+30 sec. T90 (15-350 keV) is 0.6 +- 0.2 sec (estimated error including systematics).
The time-averaged spectrum from T-0.0 to T+1.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.63 +- 0.09. The fluence in the 15-150 keV band is 4.6 +- 0.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.04 sec in the 15-150 keV band is 4.1 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/440606/BA/
GCN Circular #11468
S. B. Cenko (UC Berkeley), A. J. Levan (Warwick), R. Chornock, E. Berger (Harvard), D. A. Perley, J. S. Bloom (UC Berkeley), and N. Tanvir (Leicester) report on behalf of a larger collaboration:
We have obtained a second series of i'-band imaging (Perley et al., GCN 11464) of the field of the short-hard GRB101219A (Gelbord et al., GCN 11461) with the Gemini Multi-Object Spectrograph mounted on the 8-m Gemini South telescope. Observations consisted of 12 x 180 s exposures beginning at 6:55 UT (~ 4.2 hours after the burst trigger).
Digital subtraction of the two epochs reveals no transient emission within or around the XRT error circle. Using several common SDSS objects for calibration, we place an upper limit of i' > 24.5 mag. Similarly, aperture photometry reveals the source mentioned by Perley et al. (GCN 11464), which is clearly extended in our images, remains approximately constant over this time period, with an i-band magnitude of ~ 23.5.
We further note that no sources are present in any filter in the SDSS pre-explosion imaging of the field in the immediate environment of the XRT error circle. The limits, however, would not be sufficient to detect the extended source mentioned above.
GCN Circular #11469
R. Chornock, W. Fong, E. Berger (Harvard), and E. Persson (Carnegie) report:
We observed the field of the short-hard burst GRB 101219A (Gelbord et al., GCN 11461) with FourStar on the 6.5-m Magellan Baade telescope. Observations in the J band began at 03:43:20 UT, 1.2 hours after the BAT trigger time. The source in the XRT error circle found by Perley et al. (GCN 11464) is clearly detected in our images, at a preliminary magnitude of J=21.6 in comparison to 2MASS stars in the field. The object is clearly extended in our images (seeing <0.5"), so it is likely the host galaxy and is not dominated by an afterglow, consistent with the non-detection of fading in the optical (Cenko et al., GCN 11468).
GCN Circular #11470
S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report:
The short hard GRB 101219A, (Swift/BAT trigger=3D440606: Gelbord, et al., GCN 11461; Krimm et.al, GCN 11467) triggered Konus-Wind at T0=3D09094.716s UT (02:31:34.716)
The total duration of the burst is ~0.6 s. The emission is seen up to 10 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB101219_T09094/
As observed by Konus-Wind, the burst had a fluence of (3.6 =B1 0.5)x10-6 erg/cm2, and a 16-ms peak flux, measured from T0+0.032s, of (2.8 =B1 0.8)x10-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-integrated spectrum of the major part of the burst (from T0 to T0+0.256 s) is best fit in the 20 keV - 10 MeV range by a power law with exponential cutoff model, for which alpha =3D -0.22 (-0.25, +0.30), and Ep =3D 490(-79, +103) keV, chi2 =3D 27.6/30 dof.
The spectrum at the maximum count rate (measured from T0 to T0+0.064 s) is best fit in the 20 keV - 10 MeV range by a power law with exponential cutoff model, for which alpha =3D -0.05 (-0.45, +0.60), and Ep =3D 426(-100, +173) keV, chi2 =3D 9/10 dof.
All the quoted results are preliminary. All the quoted errors are at the 90% confidence level.
GCN Circular #11471
F. Olivares E. (MPE Garching), A. Rossi (TLS Tautenburg), J. Greiner, J. Elliott (both MPE Garching) and D. A. Kann (TLS Tautenburg) report on behalf of the GROND team:
We observed the field of GRB 101219A (Swift trigger 440606; Gelbord et al., GCN #11461) 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 at 03:52 UT on December 19, 1.36 hours after the GRB, and have total exposure of 1501 s in g'r'i'z' and 1200 s in JHK. They were performed at an average seeing of 0.8" and at an average airmass of 1.13.
We do not detect a source within the XRT error circle reported by Gelbord (GCN #11461) down to the following 3 sigma upper limits (all in AB):
```
g' > 23.4
r' > 23.6
i' > 23.1
z' > 23.2
J > 22.2
H > 21.8 and
K > 20.2
```
The given limits are derived based on calibrating the images against SDSS and 2MASS field stars and are not corrected for the Galactic foreground extinction corresponding to a reddening of E(B-V)=0.06 in the direction of the burst (Schlegel et al. 1998).
Our limits are not deep enough to detect the host galaxy candidate found in the optical (Perley et al., GCN 11464, Cenko et al., GCN 11468) and the NIR (Chornock et al., GCN 11469).
GCN Circular #11472
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 101219A 67 s after the BAT trigger (Gelbord et al., GCN Circ. 11461). No optical afterglow consistent with the XRT position is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC            67          217          147         >20.8
u_FC               279          528          246         >19.9
white               67         5557          467         >21.4
v                  608         5968          432         >19.7
b                  534         6724          369         >20.3
u                  279         6582          658         >20.5
w1                 658         6377          432         >21.0
m2                 632         6172          432         >20.2
w2                 584         5763          432         >20.9
```
The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.06 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #11474
J.M. Gelbord (PSU) and D. Grupe (PSU) report on behalf of the Swift-XRT team:
We have analysed 5.8 ks of XRT data for GRB 101219A (Gelbord et al. GCN Circ. 11461), from 70 s to 18.0 ks after the BAT trigger. The data comprise 13 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode.
The light curve after 200s can be modelled as a power-law decay. The decay index is alpha=-1.8 (+/-0.2).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.78 (+0.25, -0.23). The best-fitting absorption column is 3.1 (+1.1, -0.9) x 10^21 cm^-2, in excess of the Galactic value of 4.87 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 4.9 x 10^-11 (6.9 x 10^-11) erg cm^-2 count^-1.
```
A summary of the PC-mode spectrum is thus:
Total column:        3.1 (+1.1, -0.9) x 10^21 cm^-2
Galactic foreground: 4.9 x 10^20 cm^-2
Excess significance: 4.8 sigma
Photon index:        1.78 (+0.25, -0.23)
```
If the light curve continues to decay with a power-law decay index of 1.8, the count rate at T+24 hours will be 2 x 10^-5 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.5 x 10^-16 (1.1 x 10^-15) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00440606.
This circular is an official product of the Swift-XRT team.
GCN Circular #11476
J. Gorosabel (IAA-CSIC, Granada), M. Visus (IAC, Obs Teide, Tenerife), J. Garcia (IAC, Obs Teide, Tenerife), A. de Ugarte Postigo (DARK/NBI, Copenhagen), report on behalf of a larger collaboration:
"We have observed the field of GRB 101219A (Gelbord et al., GCN 11461) with the IAC80 telescope located at the Observatory of Teide, Tenerife. The observations were carried out in the R and I bands on Dec 19.11291-19.15778 UT (starting 11.1 minutes after the GRB). No object is detected within the XRT error circle down to R~21.5 and I~20.5 (calibration based on USNO-A2)."
GCN Circular #11479
D. Kuroda (OAO, NAOJ), H. Hanayama, T. Miyaji, J. Watanabe (IAO, NAOJ), K. Yanagisawa (OAO, NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 101219A (Gelbord et al., GCN 11461) with the optical three color (g', Rc and Ic) CCD camera attached to the Murikabushi 1m telescope of Ishigakijima Astronomical Observatory.
The observation started on 2010-12-19 10:30:50 UT (~8.0 h after the trigger). We did not find any new point source within the XRT error circle (Gelbord et al., GCN 11461) in all the three bands.
Three sigma upper limits of the OT are listed below. We used SDSS catalog for flux calibration.
```
T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
------------------------------------------------------
0.33651    10:36:04     480.0    >19.1  >19.1  >18.7
0.46387    13:39:28    1500.0    >20.9  >20.7  >20.0
------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]
```
GCN Circular #11483
E. Berger (Harvard) reports on behalf of a larger collaboration:
"We observed the field of the short GRB 101219A (GCN 11467) with ACIS-S on the Chandra X-ray Observatory starting on 2010 December 23.05 UT (3.942 hours after the burst) for a total of 19.8 ksec. We do not detect any source within the XRT error circle (GCN 11461), or in coincidence with the proposed host galaxy (GCNs 11464, 11468, 11469). We place a limit of about 3e-15 erg/cm^2/s (3-sigma) on the flux of the X-ray afterglow at a mean time of 351.6 ksec after the burst, indicating a decline rate of alpha_X<-1.1.
We thank Harvey Tananbaum and the CXO scheduling staff (in particular Ping Zhao) for rapidly approving and executing this observation."
GCN Circular #11518
R. Chornock and E. Berger (Harvard) report on behalf of a larger collaboration:
We obtained 4x1800s of spectroscopy of the host galaxy candidate (Perley et al., GCN 11464; Cenko et al., GCN 11468; Chornock et al., GCN 11469) found in the XRT error circle of the short-hard GRB 101219A (Gelbord et al., GCN 11461) using GMOS on Gemini-North starting on January 2.25 UT. Observations were obtained with the R400 grating, covering 5890-10100 Angstroms in nod-and-shuffle mode. The galaxy spectrum exhibits emission lines due to [O II] 3727 Angs and [O III] 5007 Angs at a redshift of 0.718.
1302.3221 from 15 Feb 13
Wen-fai Fong et al.: Demographics of the Galaxies Hosting Short-duration Gamma-Ray Bursts
We present observations of the afterglows and host galaxies of three short-duration gamma-ray bursts (GRBs): 100625A, 101219A and 110112A. We find that GRB 100625A occurred in a z=0.452 early-type galaxy with a stellar mass of 4.6e9 M_Sun and a stellar population age of 0.7 Gyr, and GRB 101219A originated in a star-forming galaxy at z=0.718 with a stellar mass of 1.4e9 M_Sun, a star formation rate of 16 M_Sun yr^-1, and a stellar population age of 50 Myr. We also report the discovery of the optical afterglow of GRB 110112A, which lacks a coincident host galaxy to i>26 mag and we cannot conclusively identify any field galaxy as a possible host. The bursts have inferred circumburst densities of ~1e-4-1 cm^-3, and isotropic-equivalent gamma-ray and kinetic energies of 1e50-1e51 erg. These events highlight the diversity of galaxies that host short GRBs. To quantify this diversity, we use the sample of 36 Swift short GRBs with robust associations to an environment (~1/2 of 68 short bursts detected by Swift to May 2012) and classify them as follows: late-type (50%), early-type (15%), inconclusive (20%), and host-less (lacking a coincident host galaxy to limits of >26 mag; 15%). To find likely ranges for the true late- and early-type fractions, we assign each of the host-less bursts to the late- or early-type category using probabilistic arguments, and consider the scenario that all hosts in the inconclusive category are early-type galaxies to set an upper bound on the early-type fraction. The most likely ranges for the late- and early-type fractions are ~60-80% and ~20-40%, respectively. We find no clear trend between gamma-ray duration and host type, and no change to the fractions when excluding events recently claimed as possible contaminants from the long GRB/collapsar population. Our reported demographics are consistent with a short GRB rate driven by both stellar mass and star formation.

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