Gamma-ray Burst 111229A

(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:     Thu 29 Dec 11 22:38:09 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     510736,   Seg_Num: 0
GRB_RA:           76.282d {+05h 05m 08s} (J2000),
                  75.735d {+05h 02m 56s} (current),
                  78.600d {+05h 14m 24s} (1950)
GRB_DEC:         -84.723d {-84d 43' 20"} (J2000),
                 -84.706d {-84d 42' 22"} (current),
                 -84.783d {-84d 46' 59"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       4060 [cnts]    Image_Peak=187 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   137     E_range: 15-50 keV
BKG_INTEN:       26918 [cnts]
BKG_TIME:        81456.27 SOD {22:37:36.27} UT
BKG_DUR:         8 [sec]
GRB_DATE:        15924 TJD;   363 DOY;   11/12/29
GRB_TIME:        81472.27 SOD {22:37:52.27} UT
GRB_PHI:          -0.24 [deg]
GRB_THETA:        30.39 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     9.79 [sigma]
IMAGE_SIGNIF:    7.81 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +1  -2  +0  +0 -31  +0 
SUN_POSTN:       278.55d {+18h 34m 13s}  -23.20d {-23d 12' 14"}
SUN_DIST:         71.69 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.50d {+22h 46m 01s}   -2.17d {-02d 10' 02"}
MOON_DIST:        88.23 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.51,-29.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      273.97,-71.65 [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 = 161.50,-20.06 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Dec 11 22:39:30 UT
NOTICE_TYPE:     Swift-XRT Nack-Position
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.160d {+05h 04m 38s} (J2000)
POINT_DEC:       -84.729d {-84d 43' 44"} (J2000)
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81555.58 SOD {22:39:15.58} UT,   83.3 [sec] since BAT Trigger Time
COUNTS:          8    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:     Thu 29 Dec 11 22:41:35 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     510736,   Seg_Num: 0
GRB_RA:           76.282d {+05h 05m 08s} (J2000),
                  75.735d {+05h 02m 56s} (current),
                  78.600d {+05h 14m 24s} (1950)
GRB_DEC:         -84.723d {-84d 43' 20"} (J2000),
                 -84.706d {-84d 42' 22"} (current),
                 -84.783d {-84d 46' 59"} (1950)
GRB_DATE:        15924 TJD;   363 DOY;   11/12/29
GRB_TIME:        81472.27 SOD {22:37:52.27} UT
TRIGGER_INDEX:   137
GRB_PHI:          -0.24 [deg]
GRB_THETA:        30.39 [deg]
DELTA_TIME:      0.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     9.79 [sigma]
IMAGE_SIGNIF:    7.81 [sigma]
LC_URL:          sw00510736000msb.lc
SUN_POSTN:       278.56d {+18h 34m 14s}  -23.20d {-23d 12' 14"}
SUN_DIST:         71.69 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.53d {+22h 46m 08s}   -2.16d {-02d 09' 21"}
MOON_DIST:        88.24 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.51,-29.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      273.97,-71.65 [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 = 161.50,-20.06 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Dec 11 22:43:56 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     510736,   Seg_Num: 0
GRB_RA:           76.3062d {+05h 05m 13.48s} (J2000),
                  75.7613d {+05h 03m 02.71s} (current),
                  78.6167d {+05h 14m 28.01s} (1950)
GRB_DEC:         -84.7085d {-84d 42' 30.6"} (J2000),
                 -84.6924d {-84d 41' 32.5"} (current),
                 -84.7690d {-84d 46' 08.4"} (1950)
GRB_ERROR:       4.3 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81568.00 SOD {22:39:28.00} UT,   95.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       278.56d {+18h 34m 14s}  -23.20d {-23d 12' 13"}
SUN_DIST:         71.70 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.55d {+22h 46m 12s}   -2.15d {-02d 08' 53"}
MOON_DIST:        88.25 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.50,-29.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      273.98,-71.66 [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:     Thu 29 Dec 11 22:44:47 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.159d {+05h 04m 38s} (J2000)
POINT_DEC:       -84.729d {-84d 43' 44"} (J2000)
POINT_ROLL:      201.641d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81559.64 SOD {22:39:19.64} UT,   87.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        7.493
N_STARS:         42
X_OFFSET:        389 [pixels]
Y_OFFSET:        557 [pixels]
X_MAX:           1348 [pixels]
Y_MAX:           1516 [pixels]
DET_THRESH:      24
PHOTO_THRESH:    15
SL_URL:          sw00510736000msufc0087.fits
SUN_POSTN:       278.56d {+18h 34m 14s}  -23.20d {-23d 12' 13"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.56d {+22h 46m 14s}   -2.15d {-02d 08' 43"}
MOON_DIST:        88.24 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.00,-71.64 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Dec 11 22:45:10 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.159d {+05h 04m 38s} (J2000)
POINT_DEC:       -84.729d {-84d 43' 44"} (J2000)
POINT_ROLL:      201.641d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81559.64 SOD {22:39:19.64} UT,   87.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        7.493
N_STARS:         42
X_OFFSET:        389 [pixels]
Y_OFFSET:        557 [pixels]
X_MAX:           1348 [pixels]
Y_MAX:           1516 [pixels]
DET_THRESH:      24
PHOTO_THRESH:    15
SL_URL:          sw00510736000msufc0087.fits
SUN_POSTN:       278.56d {+18h 34m 14s}  -23.20d {-23d 12' 13"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.56d {+22h 46m 15s}   -2.14d {-02d 08' 38"}
MOON_DIST:        88.24 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.00,-71.64 [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:     Thu 29 Dec 11 22:46:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.159d {+05h 04m 38s} (J2000)
POINT_DEC:       -84.729d {-84d 43' 44"} (J2000)
ROLL:            201.641d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81559.64 SOD {22:39:19.64} UT,   87.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     346891167
X_OFFSET:        708 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       868
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00510736000msuni0095.fits
SUN_POSTN:       278.56d {+18h 34m 15s}  -23.20d {-23d 12' 13"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.57d {+22h 46m 17s}   -2.14d {-02d 08' 24"}
MOON_DIST:        88.24 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.00,-71.64 [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:     Thu 29 Dec 11 22:46:38 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.159d {+05h 04m 38s} (J2000)
POINT_DEC:       -84.729d {-84d 43' 44"} (J2000)
ROLL:            201.641d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81559.64 SOD {22:39:19.64} UT,   87.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     346891167
X_OFFSET:        708 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       868
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00510736000msuni0095.fits
SUN_POSTN:       278.56d {+18h 34m 15s}  -23.20d {-23d 12' 13"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.57d {+22h 46m 17s}   -2.14d {-02d 08' 21"}
MOON_DIST:        88.24 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      274.00,-71.64 [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:        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:     Thu 29 Dec 11 22:52:37 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.182d {+05h 04m 44s} (J2000)
POINT_DEC:       -84.731d {-84d 43' 49"} (J2000)
POINT_ROLL:      201.618d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81771.68 SOD {22:42:51.68} UT,   299.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        3.107
N_STARS:         56
X_OFFSET:        149 [pixels]
Y_OFFSET:        317 [pixels]
X_MAX:           1588 [pixels]
Y_MAX:           1756 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00510736000msufc0299.fits
SUN_POSTN:       278.57d {+18h 34m 16s}  -23.20d {-23d 12' 12"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.62d {+22h 46m 29s}   -2.12d {-02d 07' 10"}
MOON_DIST:        88.26 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      273.99,-71.64 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Thu 29 Dec 11 22:52:55 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.182d {+05h 04m 44s} (J2000)
POINT_DEC:       -84.731d {-84d 43' 49"} (J2000)
POINT_ROLL:      201.618d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81771.68 SOD {22:42:51.68} UT,   299.4 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        3.107
N_STARS:         56
X_OFFSET:        149 [pixels]
Y_OFFSET:        317 [pixels]
X_MAX:           1588 [pixels]
Y_MAX:           1756 [pixels]
DET_THRESH:      15
PHOTO_THRESH:    8
SL_URL:          sw00510736000msufc0299.fits
SUN_POSTN:       278.57d {+18h 34m 16s}  -23.20d {-23d 12' 12"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.62d {+22h 46m 29s}   -2.12d {-02d 07' 06"}
MOON_DIST:        88.26 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      273.99,-71.64 [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:     Thu 29 Dec 11 22:53:13 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     510736,   Seg_Num: 0
GRB_RA:           76.2884d {+05h 05m 09.21s} (J2000),
                  75.7433d {+05h 02m 58.38s} (current),
                  78.6001d {+05h 14m 24.01s} (1950)
GRB_DEC:         -84.7108d {-84d 42' 38.8"} (J2000),
                 -84.6947d {-84d 41' 40.7"} (current),
                 -84.7714d {-84d 46' 17.0"} (1950)
GRB_ERROR:       2.5 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81568.00 SOD {22:39:28.00} UT,   95.7 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       278.57d {+18h 34m 16s}  -23.20d {-23d 12' 12"}
SUN_DIST:         71.70 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.63d {+22h 46m 30s}   -2.12d {-02d 07' 03"}
MOON_DIST:        88.27 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.50,-29.39 [deg] galactic lon,lat of the burst
ECL_COORDS:      273.98,-71.66 [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:     Thu 29 Dec 11 22:54:00 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.182d {+05h 04m 44s} (J2000)
POINT_DEC:       -84.731d {-84d 43' 49"} (J2000)
ROLL:            201.618d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81771.68 SOD {22:42:51.68} UT,   299.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     346891379
X_OFFSET:        708 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       868
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00510736000msuni0307.fits
SUN_POSTN:       278.57d {+18h 34m 16s}  -23.20d {-23d 12' 12"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.63d {+22h 46m 32s}   -2.12d {-02d 06' 53"}
MOON_DIST:        88.26 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      273.99,-71.64 [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:     Thu 29 Dec 11 22:54:18 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     510736,   Seg_Num: 0
POINT_RA:         76.182d {+05h 04m 44s} (J2000)
POINT_DEC:       -84.731d {-84d 43' 49"} (J2000)
ROLL:            201.618d
IMG_START_DATE:  15924 TJD;   363 DOY;   11/12/29
IMG_START_TIME:  81771.68 SOD {22:42:51.68} UT,   299.4 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     346891379
X_OFFSET:        708 [pixels]
Y_OFFSET:        876 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       868
Y_GRB_POS:       1036
BINNING_INDEX:   1
IM_URL:          sw00510736000msuni0307.fits
SUN_POSTN:       278.57d {+18h 34m 16s}  -23.20d {-23d 12' 12"}
SUN_DIST:         71.68 [deg]   Sun_angle= -10.5 [hr] (East of Sun)
MOON_POSTN:      341.63d {+22h 46m 32s}   -2.11d {-02d 06' 50"}
MOON_DIST:        88.26 [deg]
MOON_ILLUM:      28 [%]
GAL_COORDS:      297.53,-29.39 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      273.99,-71.64 [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:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN Circular #12774
A. Y. Lien (NASA/GSFC/ORAU), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), P. D'Avanzo (INAF-OAB), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), H. A. Krimm (CRESST/GSFC/USRA), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), J. L. Racusin (NASA/GSFC), P. Romano (INAF-IASFPA), E. Troja (NASA/GSFC/ORAU) and B.-B. Zhang (PSU) report on behalf of the Swift Team:
At 22:37:52 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111229A (trigger=510736). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 76.282, -84.723, which is
```
   RA(J2000)  =  05h 05m 08s
   Dec(J2000) = -84d 43' 20"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two or three peaks with a total duration of about 25 sec. The peak count rate was ~1300 counts/sec (15-350 keV), at ~1 sec after the trigger.
The XRT began observing the field at 22:39:15.5 UT, 83.3 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 76.2885, -84.7108 which is equivalent to:
```
   RA(J2000)  = 05h 05m 09.25s
   Dec(J2000) = -84d 42' 38.8"
```
with an uncertainty of 2.5 arcseconds (radius, 90% containment). This location is 43 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. We cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density in excess of the Galactic value (1.04 x 10^21 cm^-2, Kalberla et al. 2005), with an excess column of 9.2 (+7.65/-5.74) x 10^21 cm^-2 (90% confidence).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 87 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image processing failed because of no aspect solution. Results from the list of sources generated on-board are not available at this time. A full analysis will not be possible until the full data set is downlinked.
Burst Advocate for this burst is A. Y. Lien (yarleen AT gmail.com). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #12775
A. Nicuesa Guelbenzu, S. Klose, D. A. Kann (all TLS Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 111229A (Lien et al., GCN 12774) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2-m MPG/ESO telescope on La Silla.
Observations started in twilight, at 00:45 UT on December 30, 2.12 hr after the burst. In the refined XRT error circle (Lien et al., GCN 12774), we detect a new source in all bands which is significantly brighter than the DSS2 limit at RA, DEC (J2000) = 05:05:08.84, -84:42:38.7. At a mean time of December 30, 00:51 UT, in an 8min exposure, we measure the following preliminary magnitudes (AB system):
```
     g' = 20.50  +/- 0.04,
     r' = 19.96  +/- 0.03,
     i' = 19.74  +/- 0.03,
     z' = 19.58  +/- 0.03,
     J  = 19.01  +/- 0.11.
```
We propose this source to be the afterglow of GRB 111229A, implying a redshift of less than 3.5.
After correcting for a Galactic reddening of 0.18 mag, the SED is best fit with a spectral slope of 0.72 +/- 0.06.
Optical data are calibrated against GROND zero points and NIR data against 2MASS field stars. Observations are continuing.
GCN Circular #12776
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (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 111229A (trigger #510736) (Lien, et al., GCN Circ. 12774). The BAT ground-calculated position is RA, Dec = 76.561, -84.687 deg which is
```
   RA(J2000)  =  05h 06m 14.5s 
   Dec(J2000) = -84d 41' 14.8" 
```
with an uncertainty of 2.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 78%.
The mask-weighted light curve shows an initial peak starting at ~T-2 sec, peaking at ~T+1 sec, and returning to baseline at ~T+7 sec. The second weaker peak starts at ~T+15 sec and ends at ~T+22 sec. T90 (15-350 keV) is 25.4 +- 5.0 sec (estimated error including systematics).
The time-averaged spectrum from T-0.97 to T+26.15 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.85 +- 0.33. The fluence in the 15-150 keV band is 3.4 +- 0.7 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.12 sec in the 15-150 keV band is 1.0 +- 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/510736/BA/
GCN Circular #12777
A. Cucchiara (UCSC/UCO Lick), A. J. Levan (U. Warwick), and N. Tanvir (U. Leicester) report:
On December 30.05 UT (157 minutes after the BAT trigger) we observed the field of GRB 111229A (Lien et al., GCN 12774) using GMOS-South on the Gemini-South 8-m telescope.
An optical afterglow is detected at a position reported by Nicuesa Guelbenzu et al. (GCN 12775). Subsequent spectroscopic observation of the optical afterglow of GRB 111229A (range 5900-10080 Angstroms) reveals several absorption features, including FeII2586,2600, MnII2606, MgII2796,2803 and MgII2853 at a common redshift of 1.3805.
We therefore suggest this to be the redshift of GRB 111229A.
We thank the Gemini staff for performing this observation, in particular Pascale Hibon.
GCN Circular #12780
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 943 s of XRT Photon Counting mode data and 2 UVOT images for GRB 111229A, 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 = 76.28979, -84.71099 which is equivalent to:
```
RA (J2000): 05h 05m 9.55s
Dec (J2000): -84d 42' 39.6"
```
with an uncertainty of 1.8 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 #12781
P.A. Evans (U. Leicester), O.M. Littlejohns (U. Leicester), B. Sbarufatti (INAF-OAB/PSU), G. Stratta (ASDC), P. D'Avanzo (INAF-OAB), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester) and A.Y. Lien report on behalf of the Swift-XRT team:
We have analysed 6.7 ks of XRT data for GRB 111229A (Lien et al. GCN Circ. 12774), from 93 s to 22.6 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Osborne et al. (GCN. Circ 12780).
The late-time light curve (from T0+4.4 ks) can be modelled with a power-law decay with a decay index of alpha=1.54 (+0.14, -0.13).
A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.06 (+0.17, -0.14). The best-fitting absorption column is 1.9 (+/-0.5) x 10^21 cm^-2, in excess of the Galactic value of 1.0 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.7 x 10^-11 (5.5 x 10^-11) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.9 (+/-0.5) x 10^21 cm^-2
Galactic foreground: 1.0 x 10^21 cm^-2
Excess significance: 2.7 sigma
Photon index:	     2.06 (+0.17, -0.14)
```
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00510736.
This circular is an official product of the Swift-XRT team.
GCN Circular #12782
C. Guidorzi (U. Ferrara), A. Melandri (INAF-OAB) report on behalf of the LJMU GRB group:
The 2-m Faulkes Telescope South observed Swift GRB 111229A (Lien et al. GCN Circ. 12774) on December 30, from 10:08 UT, corresponding to 11.5 hours after the BAT trigger time. We clearly detect the optical afterglow (Nicuesa Guelbenzu et al. GCN Circ 12775; Cucchiara et al. GCN Circ. 12777) in the R filter and marginally in the i' filter with the following magnitude:
```
Mid time from  Total Exp   Filter    Magnitude    Limit
trigger (hr)   (s)
--------------------------------------------------------
11.77          6x300       i'        21.6 +- 0.5 >20.9
12.34          6x300       R         21.4 +- 0.1
--------------------------------------------------------
```
Magnitudes are calibrated against nearby USNOB-1 stars. Comparing with GROND observations (Nicuesa Guelbenzu et al GCN 12775), we derive an average power-law decay index of about 0.8.
GCN Circular #12783
S. R. Oates (MSSL-UCL) and A. Y. Lien (NASA/GSFC/ORAU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 111229A 87 s after the BAT trigger (Lien et al., GCN Circ. 12774). A source consistent with the XRT position (Osborne et al., GCN Circ. 12780) and the GROND optical position (Nicuesa Guelbenzu et al., GCN Circ. 12780) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
```
  RA  (J2000) =  05:05:08.86 =  76.28692 (deg.)
  Dec (J2000) = -84:42:39.1  = -84.71085 (deg.)
```
with an estimated uncertainty of 0.55 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)           Mag

white (FC)        87            237           147          18.78 +/- 0.10
white            5230          5430           200          20.48 +/- 0.27
v                 630           649            20          17.70 +/- 0.49
b                 554           574            20          18.75 +/- 0.53
u (FC)            300           549           250          19.03 +/- 0.23
u                4820          5020           200	   20.67 +/- 0.53
w1                679          6251           413           >20.4
m2               4410          6046           393           >20.4
w2                779         22585          1597           >21.4
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.18 in the direction of the burst (Schlegel et al. 1998).
GCN Report 353.1
GCN_Report 353.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_353_1.pdf by A.Y. Lien at NASA/GSFC/ORAU titled: "Final Swift Observations of GRB 111229A"

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Jochen Greiner, last update: 30-Dec-2011 [Disclaimer]