Gamma-ray Burst 081222

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:54:12 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.751d {+01h 31m 00s} (J2000),
                  22.853d {+01h 31m 25s} (current),
                  22.183d {+01h 28m 44s} (1950)
GRB_DEC:         -34.128d {-34d 07' 41"} (J2000),
                 -34.082d {-34d 04' 55"} (current),
                 -34.386d {-34d 23' 07"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       1521 [cnts]    Image_Peak=115 [image_cnts]
TRIGGER_DUR:     0.256 [sec] 
TRIGGER_INDEX:   123     E_range: 25-100 keV
BKG_INTEN:       26936 [cnts]
BKG_TIME:        17628.64 SOD {04:53:48.64} UT
BKG_DUR:         8 [sec]
GRB_DATE:        14822 TJD;   357 DOY;   08/12/22
GRB_TIME:        17639.97 SOD {04:53:59.97} UT
GRB_PHI:         177.28 [deg]
GRB_THETA:        11.34 [deg]
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.04 [sigma]
IMAGE_SIGNIF:    8.08 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2 +28  +0  +0  +6  +0 
SUN_POSTN:       270.78d {+18h 03m 07s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.59 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.62d {+13h 54m 29s}  -17.24d {-17d 14' 08"}
MOON_DIST:       128.39 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.81,-78.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        5.28,-39.95 [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 = 167.56,-1.60 [deg].

red DSS finding chart ps-file

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:54:18 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      45
TRIGGER_NUM:     251614441
GRB_RA:           34.083d {+02h 16m 20s} (J2000),
                  34.184d {+02h 16m 44s} (current),
                  33.520d {+02h 14m 05s} (1950)
GRB_DEC:         -26.367d {-26d 21' 59"} (J2000),
                 -26.325d {-26d 19' 30"} (current),
                 -26.598d {-26d 35' 52"} (1950)
GRB_ERROR:       6.95 [deg radius, statistical plus systematic]
GRB_INTEN:       418 [cnts/sec]
DATA_SIGNIF:     21.00 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        14822 TJD;   357 DOY;   08/12/22
GRB_TIME:        17640.25 SOD {04:54:00.25} UT
GRB_PHI:          63.00 [deg]
GRB_THETA:        40.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.81
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      88%  GRB
2nd_MOST_LIKELY:   9%  Generic Transient
DETECTORS:       0,1,0, 0,1,0, 0,0,0, 1,0,0, 0,0,
SUN_POSTN:       270.78d {+18h 03m 07s}  -23.44d {-23d 26' 08"}
SUN_DIST:        106.04 [deg]   Sun_angle= -8.2 [hr] (East of Sun)
MOON_POSTN:      208.62d {+13h 54m 29s}  -17.24d {-17d 14' 09"}
MOON_DIST:       136.10 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      215.48,-71.05 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       20.94,-37.39 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 243.77,-20.58 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:54:27 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      57
TRIGGER_NUM:     251614441
GRB_RA:           29.417d {+01h 57m 40s} (J2000),
                  29.517d {+01h 58m 04s} (current),
                  28.857d {+01h 55m 26s} (1950)
GRB_DEC:         -30.567d {-30d 33' 59"} (J2000),
                 -30.523d {-30d 31' 22"} (current),
                 -30.810d {-30d 48' 34"} (1950)
GRB_ERROR:       4.95 [deg radius, statistical plus systematic]
GRB_INTEN:       564 [cnts/sec]
DATA_SIGNIF:     57.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        14822 TJD;   357 DOY;   08/12/22
GRB_TIME:        17640.25 SOD {04:54:00.25} UT
GRB_PHI:          57.98 [deg]
GRB_THETA:        45.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      1.00
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      61%  GRB
2nd_MOST_LIKELY:  36%  Generic SGR
DETECTORS:       0,1,0, 0,1,0, 0,0,0, 1,0,0, 0,0,
SUN_POSTN:       270.78d {+18h 03m 07s}  -23.44d {-23d 26' 08"}
SUN_DIST:        100.25 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:      208.62d {+13h 54m 29s}  -17.24d {-17d 14' 10"}
MOON_DIST:       132.23 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      230.20,-75.11 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       13.91,-39.40 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 243.77,-20.58 [deg].

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:55:08 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      56
TRIGGER_NUM:     251614441
GRB_RA:           29.720d {+01h 58m 53s} (J2000),
                  29.817d {+01h 59m 16s} (current),
                  29.179d {+01h 56m 43s} (1950)
GRB_DEC:         -35.800d {-35d 47' 59"} (J2000),
                 -35.757d {-35d 45' 23"} (current),
                 -36.042d {-36d 02' 32"} (1950)
GRB_ERROR:       1.70 [deg radius, statistical only]
DATA_SIGNIF:     45.10 [sigma]
DATA_INTERVAL:   2.048 [sec]
GRB_DATE:        14822 TJD;   357 DOY;   08/12/22
GRB_TIME:        17640.25 SOD {04:54:00.25} UT
GRB_PHI:          60.00 [deg]
GRB_THETA:        50.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   1 (Gnd S/W Version number)
SUN_POSTN:       270.78d {+18h 03m 07s}  -23.44d {-23d 26' 08"}
SUN_DIST:         97.41 [deg]   Sun_angle= -7.9 [hr] (East of Sun)
MOON_POSTN:      208.63d {+13h 54m 31s}  -17.24d {-17d 14' 18"}
MOON_DIST:       126.99 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      248.25,-73.24 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       10.95,-44.16 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:55:13 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      67
TRIGGER_NUM:     251614441
GRB_RA:           30.030d {+02h 00m 07s} (J2000),
                  30.128d {+02h 00m 31s} (current),
                  29.486d {+01h 57m 57s} (1950)
GRB_DEC:         -34.810d {-34d 48' 35"} (J2000),
                 -34.767d {-34d 46' 00"} (current),
                 -35.052d {-35d 03' 05"} (1950)
GRB_ERROR:       1.62 [deg radius, statistical only]
DATA_SIGNIF:     62.30 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        14822 TJD;   357 DOY;   08/12/22
GRB_TIME:        17640.25 SOD {04:54:00.25} UT
GRB_PHI:          60.00 [deg]
GRB_THETA:        49.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   1 (Gnd S/W Version number)
SUN_POSTN:       270.78d {+18h 03m 07s}  -23.44d {-23d 26' 08"}
SUN_DIST:         98.20 [deg]   Sun_angle= -8.0 [hr] (East of Sun)
MOON_POSTN:      208.63d {+13h 54m 31s}  -17.24d {-17d 14' 19"}
MOON_DIST:       127.97 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      244.74,-73.43 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       11.91,-43.41 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Mon 22 Dec 08 04:54:55 UT
NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
TRIGGER_NUM:    5391,   Sub_Num: 0
GRB_INTEN:      9.40 [sigma]
GRB_TIME:       17638.74 SOD {04:53:58.74} UT
GRB_DATE:       14822 TJD;   357 DOY;   08/12/22
COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
COMMENTS:
+ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2008-12-22T04-53-58.6275-18183-00007+-0.lc

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:55:36 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.7400d {+01h 30m 57.5s} (J2000),
                  22.8419d {+01h 31m 22.0s} (current),
                  22.1718d {+01h 28m 41.2s} (1950)
GRB_DEC:         -34.0949d {-34d 05' 41.6"} (J2000),
                 -34.0488d {-34d 02' 55.8"} (current),
                 -34.3522d {-34d 21' 07.8"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       121 [cnts]
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17691.72 SOD {04:54:51.72} UT,   51.8 [sec] since BAT Trigger Time
CENTROID_X:      326.84,  raw= 327  [pixels]
CENTROID_Y:      245.60,  raw= 246  [pixels]
ROLL:            238.48 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -123.50
GRB_POS_XRT_Z:   57.86
IMAGE_URL:       sw00337914000msxps_rw.img
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.60 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.63d {+13h 54m 31s}  -17.24d {-17d 14' 23"}
MOON_DIST:       128.42 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.70,-79.02 [deg] galactic lon,lat of the burst
ECL_COORDS:        5.29,-39.91 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:55:44 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.7400d {+01h 30m 57.5s} (J2000),
                  22.8419d {+01h 31m 22.0s} (current),
                  22.1718d {+01h 28m 41.2s} (1950)
GRB_DEC:         -34.0949d {-34d 05' 41.6"} (J2000),
                 -34.0488d {-34d 02' 55.8"} (current),
                 -34.3522d {-34d 21' 07.8"} (1950)
GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       121 [cnts]
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17691.72 SOD {04:54:51.72} UT,   51.8 [sec] since BAT Trigger Time
CENTROID_X:      326.84,  raw= 327  [pixels]
CENTROID_Y:      245.60,  raw= 246  [pixels]
ROLL:            238.48 [deg]
GAIN:            1
MODE:            3, Long Image mode
WAVEFORM:        134
EXPO_TIME:       2.50 [sec]
GRB_POS_XRT_Y:   -123.50
GRB_POS_XRT_Z:   57.86
IMAGE_URL:       sw00337914000msxps_rw.img
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.60 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.63d {+13h 54m 32s}  -17.24d {-17d 14' 24"}
MOON_DIST:       128.41 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.70,-79.02 [deg] galactic lon,lat of the burst
ECL_COORDS:        5.29,-39.91 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:55:27 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.7400d {+01h 30m 57.59s} (J2000),
                  22.8419d {+01h 31m 22.05s} (current),
                  22.1718d {+01h 28m 41.23s} (1950)
GRB_DEC:         -34.0949d {-34d 05' 41.6"} (J2000),
                 -34.0488d {-34d 02' 55.8"} (current),
                 -34.3522d {-34d 21' 07.8"} (1950)
GRB_ERROR:       4.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       3.91e-09 [erg/cm2/sec]
GRB_SIGNIF:      11.00 [sigma]
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17691.72 SOD {04:54:51.72} UT,   51.8 [sec] since BAT Trigger Time
TAM[0-3]:        327.62 237.24 261.21 243.47
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       270.78d {+18h 03m 07s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.60 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.63d {+13h 54m 31s}  -17.24d {-17d 14' 21"}
MOON_DIST:       128.42 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.70,-79.02 [deg] galactic lon,lat of the burst
ECL_COORDS:        5.29,-39.91 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 2.08 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:57:41 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.751d {+01h 31m 00s} (J2000),
                  22.853d {+01h 31m 25s} (current),
                  22.183d {+01h 28m 44s} (1950)
GRB_DEC:         -34.128d {-34d 07' 41"} (J2000),
                 -34.082d {-34d 04' 55"} (current),
                 -34.386d {-34d 23' 07"} (1950)
GRB_DATE:        14822 TJD;   357 DOY;   08/12/22
GRB_TIME:        17639.97 SOD {04:53:59.97} UT
TRIGGER_INDEX:   123
GRB_PHI:         177.28 [deg]
GRB_THETA:        11.34 [deg]
DELTA_TIME:      -11.00 [sec]
TRIGGER_DUR:     0.256 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.04 [sigma]
IMAGE_SIGNIF:    8.08 [sigma]
LC_URL:          sw00337914000msb.lc
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.59 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.65d {+13h 54m 36s}  -17.25d {-17d 14' 46"}
MOON_DIST:       128.38 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.81,-78.99 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        5.28,-39.95 [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 = 167.56,-1.60 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:58:05 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.745d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.133d {-34d 07' 57"} (J2000)
POINT_ROLL:      238.480d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17700.24 SOD {04:55:00.24} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.688
N_STARS:         93
X_OFFSET:        432 [pixels]
Y_OFFSET:        568 [pixels]
X_MAX:           1391 [pixels]
Y_MAX:           1527 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00337914000msufc0060.fits
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.59 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.65d {+13h 54m 36s}  -17.25d {-17d 14' 50"}
MOON_DIST:       128.37 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.84,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 04:58:34 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.745d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.133d {-34d 07' 57"} (J2000)
POINT_ROLL:      238.480d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17700.24 SOD {04:55:00.24} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.688
N_STARS:         93
X_OFFSET:        432 [pixels]
Y_OFFSET:        568 [pixels]
X_MAX:           1391 [pixels]
Y_MAX:           1527 [pixels]
DET_THRESH:      14
PHOTO_THRESH:    7
SL_URL:          sw00337914000msufc0060.fits
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.66d {+13h 54m 37s}  -17.25d {-17d 14' 56"}
MOON_DIST:       128.37 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.84,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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:     Mon 22 Dec 08 04:59:34 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.745d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.133d {-34d 07' 57"} (J2000)
ROLL:            238.480d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17700.24 SOD {04:55:00.24} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     251614503
X_OFFSET:        807 [pixels]
Y_OFFSET:        1133 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       967
Y_GRB_POS:       1293
BINNING_INDEX:   1
IM_URL:          sw00337914000msuni0060.fits
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.66d {+13h 54m 39s}  -17.25d {-17d 15' 07"}
MOON_DIST:       128.36 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.84,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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:     Mon 22 Dec 08 05:00:03 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.745d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.133d {-34d 07' 57"} (J2000)
ROLL:            238.480d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17700.24 SOD {04:55:00.24} UT,   60.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     251614503
X_OFFSET:        807 [pixels]
Y_OFFSET:        1133 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       967
Y_GRB_POS:       1293
BINNING_INDEX:   1
IM_URL:          sw00337914000msuni0060.fits
SUN_POSTN:       270.78d {+18h 03m 08s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.67d {+13h 54m 40s}  -17.25d {-17d 15' 12"}
MOON_DIST:       128.36 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.84,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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_sources_image.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 05:04:35 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
POINT_ROLL:      238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17912.51 SOD {04:58:32.51} UT,   272.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.599
N_STARS:         75
X_OFFSET:        487 [pixels]
Y_OFFSET:        813 [pixels]
X_MAX:           1446 [pixels]
Y_MAX:           1772 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00337914000msufc0272.fits
SUN_POSTN:       270.79d {+18h 03m 09s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.71d {+13h 54m 49s}  -17.27d {-17d 16' 02"}
MOON_DIST:       128.35 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 05:05:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
POINT_ROLL:      238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17912.51 SOD {04:58:32.51} UT,   272.5 [sec] since BAT Trigger Time
FILTER:          7, U
BKG_MEAN:        0.599
N_STARS:         75
X_OFFSET:        487 [pixels]
Y_OFFSET:        813 [pixels]
X_MAX:           1446 [pixels]
Y_MAX:           1772 [pixels]
DET_THRESH:      7
PHOTO_THRESH:    3
SL_URL:          sw00337914000msufc0272.fits
SUN_POSTN:       270.79d {+18h 03m 09s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.71d {+13h 54m 50s}  -17.27d {-17d 16' 07"}
MOON_DIST:       128.34 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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:     Mon 22 Dec 08 05:05:58 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
ROLL:            238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17912.51 SOD {04:58:32.51} UT,   272.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     251614715
X_OFFSET:        807 [pixels]
Y_OFFSET:        1133 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       967
Y_GRB_POS:       1293
BINNING_INDEX:   1
IM_URL:          sw00337914000msuni0272.fits
SUN_POSTN:       270.79d {+18h 03m 09s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.72d {+13h 54m 52s}  -17.27d {-17d 16' 17"}
MOON_DIST:       128.34 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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:     Mon 22 Dec 08 05:06:27 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
ROLL:            238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17912.51 SOD {04:58:32.51} UT,   272.5 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     251614715
X_OFFSET:        807 [pixels]
Y_OFFSET:        1133 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       967
Y_GRB_POS:       1293
BINNING_INDEX:   1
IM_URL:          sw00337914000msuni0272.fits
SUN_POSTN:       270.79d {+18h 03m 10s}  -23.44d {-23d 26' 08"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.72d {+13h 54m 53s}  -17.27d {-17d 16' 22"}
MOON_DIST:       128.34 [deg]
MOON_ILLUM:      24 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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_sources_image.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 05:11:40 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
POINT_ROLL:      238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  18513.40 SOD {05:08:33.40} UT,   873.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.808
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        573 [pixels]
X_MAX:           1686 [pixels]
Y_MAX:           2012 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00337914000msufc0873.fits
SUN_POSTN:       270.79d {+18h 03m 10s}  -23.44d {-23d 26' 07"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.76d {+13h 55m 03s}  -17.29d {-17d 17' 20"}
MOON_DIST:       128.32 [deg]
MOON_ILLUM:      23 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 05:12:36 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
POINT_ROLL:      238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  18513.40 SOD {05:08:33.40} UT,   873.4 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        1.808
N_STARS:         190
X_OFFSET:        247 [pixels]
Y_OFFSET:        573 [pixels]
X_MAX:           1686 [pixels]
Y_MAX:           2012 [pixels]
DET_THRESH:      11
PHOTO_THRESH:    6
SL_URL:          sw00337914000msufc0873.fits
SUN_POSTN:       270.79d {+18h 03m 11s}  -23.44d {-23d 26' 07"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.77d {+13h 55m 05s}  -17.29d {-17d 17' 30"}
MOON_DIST:       128.31 [deg]
MOON_ILLUM:      23 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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:     Mon 22 Dec 08 05:13:21 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
ROLL:            238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  18513.40 SOD {05:08:33.40} UT,   873.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     251615316
X_OFFSET:        806 [pixels]
Y_OFFSET:        1132 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       966
Y_GRB_POS:       1292
BINNING_INDEX:   1
IM_URL:          sw00337914000msuni0873.fits
SUN_POSTN:       270.79d {+18h 03m 11s}  -23.44d {-23d 26' 07"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.78d {+13h 55m 07s}  -17.29d {-17d 17' 38"}
MOON_DIST:       128.31 [deg]
MOON_ILLUM:      23 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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:     Mon 22 Dec 08 05:13:44 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     337914,   Seg_Num: 0
POINT_RA:         22.744d {+01h 30m 59s} (J2000)
POINT_DEC:       -34.130d {-34d 07' 48"} (J2000)
ROLL:            238.482d
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  18513.40 SOD {05:08:33.40} UT,   873.4 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     251615316
X_OFFSET:        806 [pixels]
Y_OFFSET:        1132 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       966
Y_GRB_POS:       1292
BINNING_INDEX:   1
IM_URL:          sw00337914000msuni0873.fits
SUN_POSTN:       270.80d {+18h 03m 11s}  -23.44d {-23d 26' 07"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.78d {+13h 55m 07s}  -17.30d {-17d 17' 42"}
MOON_DIST:       128.31 [deg]
MOON_ILLUM:      23 [%]
GAL_COORDS:      254.83,-78.99 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:        5.27,-39.95 [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_sources_image.fits.gz file does not exist; skipping the attachment.  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 05:14:01 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.7406d {+01h 30m 57.74s} (J2000),
                  22.8425d {+01h 31m 22.19s} (current),
                  22.1724d {+01h 28m 41.38s} (1950)
GRB_DEC:         -34.0954d {-34d 05' 43.4"} (J2000),
                 -34.0493d {-34d 02' 57.6"} (current),
                 -34.3527d {-34d 21' 09.6"} (1950)
GRB_ERROR:       3.9 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  18539.00 SOD {05:08:59.00} UT,   899.0 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       270.80d {+18h 03m 11s}  -23.44d {-23d 26' 07"}
SUN_DIST:         93.59 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.78d {+13h 55m 08s}  -17.30d {-17d 17' 45"}
MOON_DIST:       128.34 [deg]
MOON_ILLUM:      23 [%]
GAL_COORDS:      254.70,-79.02 [deg] galactic lon,lat of the burst
ECL_COORDS:        5.29,-39.91 [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.

GCN Circular #8691
D. Grupe (PSU), M. M. Chester (PSU), J. R. Cummings (NASA/UMBC), N. Gehrels (NASA/GSFC), C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU) and M. C. Stroh (PSU) report on behalf of the Swift Team:
At 04:53:59 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 081222 (trigger=337914). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 22.751, -34.128 which is
```
   RA(J2000) = 01h 31m 00s
   Dec(J2000) = -34d 07' 41"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multipeaked structure with a duration of about 20 sec. The peak count rate was ~10000 counts/sec (15-350 keV), at 3 sec after the trigger.
The XRT began observing the field at 04:54:51.7 UT, 51.8 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source located at RA, Dec 22.74067, -34.09556 which is equivalent to:
```
   RA(J2000)  = 01h 30m 57.76s
   Dec(J2000) = -34d 05' 44.0"
```
with an uncertainty of 3.6 arcseconds (radius, 90% containment). This location is 120 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 2.24e+20 cm^-2 (Kalberla et al. 2005).
The initial flux in the 2.5 s image was 3.91e-09 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 60 seconds after the BAT trigger. There is a candidate afterglow in the rapidly available 2.7'x2.7' sub-image consistent with the XRT candidate. A precise location and magnitude estimate are not available at this time.
This burst is consistent with the Fermi GBM burst Trigger 251614441.
Burst Advocate for this burst is D. Grupe (grupe AT astro.psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
GCN Circular #8692
S. Covino, P. D'Avanzo, L.A. Antonelli, D. Malesani, D. Fugazza, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V. D'Elia, F. D'Alessio, F. Fiore, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel, E. Maiorano, N. Masetti, A. Melandri, E.J.A. Meurs, L. Nicastro, E. Palazzi, E. Pian, S. Piranomonte, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V. Testa, S.D. Vergani, F. Vitali report on behalf of the REM team:
The robotic 60-cm REM telescope located at La Silla (Chile) observed automatically the field of the GRB 081222 (Grupe et al. GCN8691) starting about 28s after the burst. We detect a bright object in our first H-band image inside the XRT error box at the following coordinates (J2000):
```
R.A. = 01:30:57.59
Dec = -34:05:41.7
```
with an uncertainty of about 1.0". The object is approximately H~11.1 at about 1min after the burst and faded rapidly during the next observations.
Further observations are in progress

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Mon 22 Dec 08 05:37:30 UT
NOTICE_TYPE:     Swift-UVOT Position
TRIGGER_NUM:     337914,   Seg_Num: 0
GRB_RA:           22.7399d {+01h 30m 57.57s} (J2000),
                  22.8418d {+01h 31m 22.02s} (current),
                  22.1717d {+01h 28m 41.21s} (1950)
GRB_DEC:         -34.0949d {-34d 05' 41.6"} (J2000),
                 -34.0488d {-34d 02' 55.8"} (current),
                 -34.3522d {-34d 21' 07.8"} (1950)
GRB_ERROR:       4.0 [arcsec radius, statistical only]
GRB_MAG:         18.00 +/- 2.00 [mag]
FILTER:          10, White
IMG_START_DATE:  14822 TJD;   357 DOY;   08/12/22
IMG_START_TIME:  17700.00 SOD {04:55:00.00} UT,   60.0 [sec] since BAT Trigger Time
SUN_POSTN:       270.81d {+18h 03m 15s}  -23.44d {-23d 26' 07"}
SUN_DIST:         93.58 [deg]   Sun_angle= -7.5 [hr] (East of Sun)
MOON_POSTN:      208.98d {+13h 55m 54s}  -17.37d {-17d 22' 03"}
MOON_DIST:       128.25 [deg]
MOON_ILLUM:      23 [%]
GAL_COORDS:      254.70,-79.02 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        5.29,-39.91 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT UVOT Position Notice.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        Position and magnitude are estimated

GCN Circular #8693
A. Updike (Clemson University), P. Afonso, C. Clemens, and J. Greiner (all MPE Garching) report on behalf of the GROND team:
We observed the field of GRB 081222 (Swift trigger 337914, Grupe et al., GCN #8691) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m ESO/MPI telescope at La Silla Observatory (Chile).
Observations started at 05:26 UT on Dec 22, 2008, 32 min after the GRB trigger. They were performed at an average seeing of 1.0" and at high airmass.
We detect the source within the Swift-XRT error circle reported by Grupe et al. (GCN #8691) and Covino et al. (GCN #8692) at
```
RA (J2000.0) = 01h 30m 57.56s
DEC (J2000.0) = -34d 05' 41.5''
```
with an uncertainty of 0.5".
We obtained 8 min of total exposures in g'r'i'z'JHK. Preliminary magnitudes (calibrated against field stars in the USNO B1.0 and 2MASS catalogs), exposure length (in seconds, NIR bands co-added), and midtimes are as follows.
```
BAND     MAGNITUDE        EXP   MIDTIME (UT)
--------------------------------------------
g'      19.08 +/- 0.01    115    05:27:13
i'      18.04 +/- 0.01    115    05:27:13
z'      18.24 +/- 0.01    115    05:27:13
J       16.12 +/- 0.03    480    05:29:18
H       15.45 +/- 0.02    480    05:29:18
K       14.92 +/- 0.03    480    05:29:18
```
Tracking problems made data reduction difficult, especially in the r' band, in which we detect the object but could not properly calibrate the field. The object is seen in g' band, implying a redshift smaller than 3.5. No correction has been made for galactic extinction.
GCN Circular #8696
A.A. Breeveld (MSSL/UCL) and D. Grupe (PSU) report on behalf of the Swift UVOT team:
The Swift/UVOT started settled observations of the burst GRB081222 (Grupe et al. GCN Circ. 8691) with the finding chart exposure in white, 60s after the BAT trigger. The afterglow is detected in the white and u filters at: 01h 30m 57.59s -34d 05' 41.49" with a 0.5" 90% confidence limit. This position is consistent with the XRT (Grupe et al. GCN Circ. 8691), REM (Covino et al. GCN Circ. 8692) and GROND (Updike et al. GCN Circ. 8693) positions. The two white exposures show that the afterglow is fading with an estimated temporal slope of alpha = 0.85. The initial UVOT magnitudes are as follows:
```
Filter   Tstart(s)   Tstop(s)   Exp(s)   Magnitude
white   60            210           147.4     14.84+/-0.02
white   873          1023         147.4     17.36+/-0.03
u          272           522           245.8     16.32+/-0.03
```
The values quoted above are in the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) and are not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=0.021 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #8697
E.Sonoda, H.Tanaka, R.Hara, N.Ohmori, K.Kono, H.hayasi, A.Daikyuji, K.Noda, Y.Nisioka, M.Yamauchi (University of Miyazaki)
We have observed the field covering the error circle of GRB081222 (Swift trigger 337914, Grupe et al., GCN 8691) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 08:41:19 UT, about 3.78 hr after the Swift trigger time. We have compared our data of 30 sec exposures with the USNO-A2.0 catalog, the upper limits are as follows:
```
--------------------------------------------------------------
Start(UT)   End(UT)    Num. of frames    Limit (mag.)
--------------------------------------------------------------
10:36:04    10:36:19          1            ~16
10:36:04    10:49:52         12            ~17
---------------------------------------------------------------
```
GCN Circular #8699
A. Melandri (Liverpool JMU), C. Guidorzi (U. Ferrara), D. Carter (Liverpool JMU) report on behalf of a larger collaboration:
On 2008 December 22 (10:17:46 UT) we began observing the field of GRB 081222 (Grupe et al. GCN Circ. 8691) with the Faulkes Telescope South. Observations consisted of two sequences of 6x300s exposures acquired using the SDSS-i and SDSS-r filters, respectively.
We clearly detect the optical afterglow reported by REM (Covino et al. GCN Circ. 8692) and GROND (Updike et al. GCN Circ. 8693), with the following magnitudes:
```
Telescope   Filter  T_mid[hr]   Exposure[s]      Mag
--------------------------------------------------------------
FTS          SDSS-i    5.47        2x300        20.45 +/- 0.25
FTS          SDSS-r    6.01        2x300        21.34 +/- 0.30
--------------------------------------------------------------
```
The calibration was performed using the R2 and I magnitudes of several USNOB-1 catalogue field objects. Uncertainties include the different zero points of the USNOB-1 stars. Compared with the value reported by GROND (Updike et al. GCN Circ. 8693), we estimate a power-law index between the two epochs of about 1.1 .
GCN Circular #8705
Dirk Grupe (PSU) reports on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 081221 (trigger=337914; Grupe et al., GCN Circ 8691) on 2008-December-22 at 04:54:51.7 UT, 51.8 seconds after the BAT trigger.
The 0.3-10 keV X-ray light curve of the first five orbits displays a smooth light curve that can be fitted with an initial decay slope alpha1 = 0.90+/-0.02 with a break at 1420+/-100s followed by a steeper decay slope alpha2=1.20+/-0.02.
The spectrum of the Windowed Timing data of the first orbit can be well fitted by an absorbed single power law model with a photon index Gamma = 2.01 +/- 0.20 and a column density NH=(4.61+/-0.80)e20 which is in excess of the Galactic column density in the direction of the burst of NH-gal=2.24e20 (Kalberla et al. 2005). The photon counting mode data of the first five orbits are consistent with this result.
If the underlying power law decay of 1.2 continues as is, we predict an XRT count rate of 0.030 counts/s at T+24 hours or 1e-12 ergs/s/cm2 and at T+48 hours 0.015 counts/s or 5e-13 ergs/s/cm2.
This circular is an official product of the Swift-XRT team.
GCN Circular #8707
M.Cwiok, W.Dominik, G.Kasprowicz, A.Majcher, A.Majczyna, K.Malek, L.Mankiewicz, K.Nawrocki, L.W.Piotrowski, D.Rybka, M.Sokolowski, J.Uzycki, G.Wrochna, M.Zaremba, A.F.Zarnecki on behalf of "Pi of the Sky" collaboration http://grb.fuw.edu.pl
During the night 20081222 the "Pi of the Sky" apparatus observed the position of GRB081222 in the sky scan mode. Three 10s images of this field have been taken at 02:10:44 - 02:11:21 ( 2 hours 43 min 16 sec before the GRB). No new object is seen within the error box and the limit is 12.5 magnitudo.
After receiving the trigger from Swift, the field was observed 63s after the GRB. No new object has been found within the Swift-BAT error box. The limiting magnitude (unfiltered) on single 10s exposures is:
```
         04:55:03 - 04:55:13 - 12.0 mag
         04:55:16 - 04:55:26 - 12.0 mag
         04:55:28 - 04:55:38 - 12.0 mag
```
The field was observed until 06:00:17, no new object brighter then 12.0mag was observed. The limit on 20 coadded images is 12.5 mag.
GCN Circular #8709
E. E. Fenimore (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-119 to T+183 sec from the recent telemetry downlink, we report further analysis of BAT GRB 081222 (trigger #337914) (Grupe, et al., GCN Circ. 8691). The BAT ground-calculated position is RA, Dec = 22.748, -34.095 deg which is
```
  RA(J2000)  =  01h 30m 59.5s
  Dec(J2000) = -34d 05' 41.4"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The burst was in the fully-coded field of view.
The mask-weighted light curve shows a main peak with several subpeaks from about T+0 to T+20 sec and an exponential tail visible to about T+70 sec. T90 (15-350 keV) is 24 +- 3 sec (estimated error including systematics).
The time-averaged spectrum from T-0.6 to T+38.0 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.08 +- 0.15, and Epeak of 131 +- 31 keV (chi squared 45.61 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 4.8 +- 0.1 x 10^-06 erg/cm2 and the 1-sec peak flux measured from T+3.45 sec in the 15-150 keV band is 7.7 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.48 +- 0.03 (chi squared 68.25 for 57 d.o.f.). 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/337914/BA/
GCN Circular #8712
Alice Breeveld (MSSL), Wayne Landsman (GSFC), Paul Kuin (MSSL) and Dirk Grupe (PSU) report on behalf of the Swift/UVOT team:
Further analysis of Swift/UVOT data of GRB081222 (Grupe et al., GCN Circ. 8691), shows that the burst was detected in the v and b filters in addition to the white and u filters described in the initial circular (Breeveld et al., GCN Circ. 8696). The source is not detected in any of the UV filters, in single or co-added exposures. The initial magnitudes and upper limits are given in the table below:
```
Filter    Tstart(s) Tstop(s)     Exp(s)   Magnitude
white   60            210           147        14.84+/-0.02
white   873          1023         147       17.36+/-0.03
v           602          622           20          16.20+/-0.02
b           528          548           20          16.86+/-0.02
u           272           522           246       16.32+/-0.03
uvw1    652          1815         142        >20.9  (3-sigma UL)
uvm2    627          1790         127        >21.0  (3-sigma UL)
uvw2    577          1914         124        >21.1  (3-sigma UL)
```
A 49s UV grism spectrum was obtained beginning 216s after the trigger. The very low S/N quicklook spectrum shows a continuum of about 3e-15 erg/s/cm2/A longward of ~3400 A. No flux is detected shortward of 3400 A, even though the grism sensitivity increases toward shorter wavelengths. If this is the wavelength of the Lyman edge, then the redshift of GRB081222 is ~2.7. The detection of GRB081222 in the u filter and the non-detection in UVW1 filter are consistent with this redshift.
The values quoted above are in the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) and are not corrected for the expected Galactic extinction corresponding to a reddening of E(B-V)=0.021 mag in the direction of the burst (Schlegel et al. 1998).
GCN Circular #8713
A. Cucchiara, D. B. Fox (Penn State), S. B. Cenko (Berkeley) and E. Berger (Harvard) report on behalf of a larger collaboration:
Starting at 01:02 UT on 2008 December 23 we observed the optical counterpart of GRB 081222 (Grupe et al., GCN 8691, Covino et al., GCN 8692 and Updike et al. 8693) using Gemini-South with the GMOS-South spectrograph (R~1600). We acquired 2x900s spectra covering the wavelength range 4000A-8000A.
We detect a damped Lyman-alpha system (DLA) at redshift z=2.77.
We also detect several metal absorption features which we interpret as SiIV(1393,1402), SiII1526 and 1260, SiII*1264, CII1334, CII*1335, CIV(1548,1550), FeII1608 and NiII(1454) at the same redshift.
In combination with the strong metal absorption features, the detection of a DLA at z = 2.77 confirms that this is the redshift of GRB 081222 and its host galaxy.
We thank the Gemini staff, in particular Henry Lee, for conducting these observations.
GCN Circular #8715
E.Bissaldi (MPE) and S. McBreen (UCD/MPE) report on behalf of the Fermi GBM Team:
"At 04:54:00.25 UT on 22 December 2008, the Fermi Gamma-Ray Burst Monitor triggered and located GRB 081222 (trigger 251614441 / 081222204), which was also detected by the Swift-BAT (Grupe et al., GCN Circular 8691 and Fenimore et al., GCN Circular 8709).
The angle from the Fermi LAT boresight is 50 degrees.
This burst was also independently detected by INTEGRAL SPI-ACS.
The GBM light curve consists of a main pulse with a duration (T90) of about 30 s (8-1000 keV) and T50 of about 10 s (8-1000 keV).
The time-averaged spectrum from T0 to T0+11.52 s is best fit by a Band function with Epeak = 134 +/- 9, alpha = -0.55 +/- 0.07 and beta = -2.10 +/- 0.06.
The event fluence (8-1000 keV) in this time interval is (1.35 +/- 0.08)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+3.3 s in the 8-1000 keV band is 14.8 +/- 1.4 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog."
GCN Circular #8716
Poonam Chandra (RMC) and Dale A. Frail (NRAO) report on behalf of the Caltech-NRAO-Carnegie GRB Collaboration:
"We used the Very Large Array to observe the field of view toward optically bright GRB 081222 (GCN 8691) at a frequency of 8.46 GHz on 2008 Dec 23.17 UT. The GRB radio afterglow is undetected and the peak radio flux at the REM optical afterglow position (GCN 8692) is 54 =B1 53 uJy.
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."
GCN Circular #8717
Rupak Roy, Brajesh Kumar, S. B. Pandey and Brijesh Kumar (ARIES, NainiTal, India, on behalf of larger Indian GRB collaboration)
GRB 081222, localized by Swift (Grupe et al. GCN 8691), was observed with 1.04m telescope at NainiTal starting ~ 9 hours after the burst in R_c and I_c filters. Photometry of the co-added R_c frames (300 sec x 6) did not detect the optical afterglow candidate (Covino et al. GCN 8692) down to a limiting magnitude of ~ 21 mag in comparison to nearby USNO stars. This message may be cited.
GCN Circular #8718
J. F. Graham (STScI/JHU), N. R. Tanvir (U. Leicester), A. S. Fruchter (STScI), K. Wiersema (U. Leicester), A. J. Levan (U. Warwick) report on behalf of a larger collaboration:
We observed the afterglow of GRB 081222 with Gemini-North/GMOS Nod & Shuffle spectroscopy beginning 22 Dec 2008 06:38 UT, approximately 105 minutes post-burst. From absorption lines of SiII, CIV, and FeII, we confirm the redshift reported in GCN 8713 (Cucchiara et al.) of z=2.77. We also find tentative evidence for a lower redshift system at z=2.74.
We thank the Gemini staff, in particular Ricardo Schiavon, for conducting these observations.
GCN Circular #8721
S. Golenetskii, R.Aptekar, E. Mazets, V. Pal'shin, D. Frederiks, P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf of the Konus-Wind team, report:
The long GRB 081222 (Swift-BAT trigger #337914: Grupe et al., GCN 8691; Fenimore et al., GCN 8709) triggered Konus-Wind at T0=17642.534 s UT (04:54:02.534).
The burst light curve shows a single pulse with a duration of ~12 s. There is a hint of the weak tail detected by the Swift-BAT (Fenimore et al., GCN 8709) in the K-W G1 band (~20-80 keV).
As observed by Konus-Wind the burst had a fluence of 1.32(-0.40, +0.48)x10^-5 erg/cm2, and a 256-ms peak flux measured from T0+4.688 s of 2.22(-0.73, +0.87)x10^-6 erg/cm2/s (both in the 20 keV - 1 MeV energy range).
The time-integrated spectrum of the burst (from T0 to T0+16.640 s) can be fitted (in the 20 keV - 1 MeV range) by GRB (Band) model for which: the low-energy photon index is alpha = -0.67(-0.33, +0.39), the high energy photon index beta = -2.35(-1.25, +0.30), the peak energy Ep = 165(-29, +47) keV (chi2 = 63.0/51 dof).
All the quoted errors are at the 90% confidence level.
Assuming z = 2.77 (Cucchiara et al., GCN 8713; Graham et al., GCN 8718) and a standard cosmology model with H_0 = 70 km/s/Mpc, Omega_M = 0.27, Omega_\Lambda = 0.73, the isotropic energy release E_iso ~2.4x10^53 erg, the peak luminosity (L_iso)_max ~ 1.5x10^53 erg/s, and Ep_rest ~600 keV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB081222_T17642/
GCN Circular #8724
D. Kuroda, M. Yoshida, K. Yanagisawa, Y. Shimizu, S. Nagayama, H. Toda (OAO, NAOJ) and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 081222 (Grupe et al. GCN 8691) with the optical three color (g', Rc and Ic) imager attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory on Dec.22 2008 UT. We detected a fading point source at the position of the X-ray - optical afterglow candidate (Covino et al. GCN 8692; Updike et al. GCN8693; Grupe GCN 8705) in Rc band. Photometric results are listed below. We used GSC2.3 catalog for flux calibration.
```
# Mid-MJD      Mid-UT   EXP-T    g'       Rc          Ic
-------------------------------------------------------------
54822.401100  09:37:36  540.0  >18.3  18.0+/-0.3  >17.8
54822.438455  10:31:23 2940.0  >19.2  18.9+/-0.3  >18.2
54822.469650  11:16:18 4500.0  >19.2  19.3+/-0.4  18.6+/-0.3
-------------------------------------------------------------
```
GCN Report 190.1
GCN_Report 190.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_190_1.pdf by D. Grupe at PSU titled: "Final Swift observations of GRB 081222"

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Jochen Greiner, last update: 05-Jan-2009 [Disclaimer]