Gamma-ray Burst 081211

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 11:48:48 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     337115,   Seg_Num: 0
  GRB_RA:          328.087d {+21h 52m 21s} (J2000),
                   328.219d {+21h 52m 53s} (current),
                   327.347d {+21h 49m 23s} (1950)
  GRB_DEC:         -33.815d {-33d 48' 53"} (J2000),
                   -33.773d {-33d 46' 20"} (current),
                   -34.050d {-34d 03' 00"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       8689 [cnts]    Image_Peak=207 [image_cnts]
  TRIGGER_DUR:     2.048 [sec] 
  TRIGGER_INDEX:   443     E_range: 15-50 keV
  BKG_INTEN:       93679 [cnts]
  BKG_TIME:        42452.67 SOD {11:47:32.67} UT
  BKG_DUR:         24 [sec]
  GRB_DATE:        14811 TJD;   346 DOY;   08/12/11
  GRB_TIME:        42490.69 SOD {11:48:10.69} UT
  GRB_PHI:         -28.73 [deg]
  GRB_THETA:        42.69 [deg]
  SOLN_STATUS:     0x83
  RATE_SIGNIF:     7.41 [sigma]
  IMAGE_SIGNIF:    6.53 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +1  +1  -2  +0  +0 -48  +0 
  SUN_POSTN:       258.92d {+17h 15m 41s}  -23.05d {-23d 02' 48"}
  SUN_DIST:         60.79 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.58d {+03h 58m 20s}  +25.29d {+25d 17' 11"}
  MOON_DIST:       104.79 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.79,-51.14 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      318.48,-19.63 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
  COMMENTS:        This trigger occurred at longitude,latitude = 58.72,-20.54 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 11:50:07 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.081d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.818d {-33d 49' 05"} (J2000)
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42600.59 SOD {11:50:00.59} UT,   109.9 [sec] since BAT Trigger Time
  COUNTS:          1    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        0    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 11 Dec 08 11:51:50 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     337115,   Seg_Num: 0
  GRB_RA:          328.087d {+21h 52m 21s} (J2000),
                   328.219d {+21h 52m 53s} (current),
                   327.347d {+21h 49m 23s} (1950)
  GRB_DEC:         -33.815d {-33d 48' 53"} (J2000),
                   -33.773d {-33d 46' 20"} (current),
                   -34.050d {-34d 03' 00"} (1950)
  GRB_DATE:        14811 TJD;   346 DOY;   08/12/11
  GRB_TIME:        42490.69 SOD {11:48:10.69} UT
  TRIGGER_INDEX:   443
  GRB_PHI:         -28.73 [deg]
  GRB_THETA:        42.69 [deg]
  DELTA_TIME:      38.00 [sec]
  TRIGGER_DUR:     2.048 [sec] 
  SOLN_STATUS:     0x83
  RATE_SIGNIF:     7.41 [sigma]
  IMAGE_SIGNIF:    6.53 [sigma]
  LC_URL:          sw00337115000msb.lc
  SUN_POSTN:       258.92d {+17h 15m 42s}  -23.05d {-23d 02' 48"}
  SUN_DIST:         60.79 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.62d {+03h 58m 28s}  +25.29d {+25d 17' 30"}
  MOON_DIST:       104.82 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.79,-51.14 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      318.48,-19.63 [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:        Since the IMAGE_SIGNIF is less than 7 sigma, this is a questionable detection.  
  COMMENTS:        This trigger occurred at longitude,latitude = 58.72,-20.54 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 11:53:32 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.081d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.818d {-33d 49' 05"} (J2000)
  POINT_ROLL:      260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42604.29 SOD {11:50:04.29} UT,   113.6 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.644
  N_STARS:         32
  X_OFFSET:        466 [pixels]
  Y_OFFSET:        602 [pixels]
  X_MAX:           1425 [pixels]
  Y_MAX:           1561 [pixels]
  DET_THRESH:      18
  PHOTO_THRESH:    10
  SL_URL:          sw00337115000msufc0113.fits
  SUN_POSTN:       258.93d {+17h 15m 42s}  -23.05d {-23d 02' 49"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.64d {+03h 58m 33s}  +25.29d {+25d 17' 41"}
  MOON_DIST:       104.85 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 11:54:11 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.081d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.818d {-33d 49' 05"} (J2000)
  POINT_ROLL:      260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42604.29 SOD {11:50:04.29} UT,   113.6 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.644
  N_STARS:         32
  X_OFFSET:        466 [pixels]
  Y_OFFSET:        602 [pixels]
  X_MAX:           1425 [pixels]
  Y_MAX:           1561 [pixels]
  DET_THRESH:      18
  PHOTO_THRESH:    10
  SL_URL:          sw00337115000msufc0113.fits
  SUN_POSTN:       258.93d {+17h 15m 42s}  -23.05d {-23d 02' 49"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.64d {+03h 58m 35s}  +25.30d {+25d 17' 45"}
  MOON_DIST:       104.85 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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:     Thu 11 Dec 08 11:55:26 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.081d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.818d {-33d 49' 05"} (J2000)
  ROLL:            260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42604.29 SOD {11:50:04.29} UT,   113.6 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     250689007
  X_OFFSET:        785 [pixels]
  Y_OFFSET:        921 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       945
  Y_GRB_POS:       1081
  BINNING_INDEX:   1
  IM_URL:          sw00337115000msuni0113.fits
  SUN_POSTN:       258.93d {+17h 15m 43s}  -23.05d {-23d 02' 49"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.66d {+03h 58m 38s}  +25.30d {+25d 17' 53"}
  MOON_DIST:       104.86 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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 11 Dec 08 11:55:54 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.081d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.818d {-33d 49' 05"} (J2000)
  ROLL:            260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42604.29 SOD {11:50:04.29} UT,   113.6 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     250689007
  X_OFFSET:        785 [pixels]
  Y_OFFSET:        921 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       945
  Y_GRB_POS:       1081
  BINNING_INDEX:   1
  IM_URL:          sw00337115000msuni0113.fits
  SUN_POSTN:       258.93d {+17h 15m 43s}  -23.05d {-23d 02' 49"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.66d {+03h 58m 39s}  +25.30d {+25d 17' 56"}
  MOON_DIST:       104.87 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 12:00:33 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 13"} (J2000)
  POINT_ROLL:      260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42817.53 SOD {11:53:37.53} UT,   326.8 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        1.163
  N_STARS:         47
  X_OFFSET:        226 [pixels]
  Y_OFFSET:        362 [pixels]
  X_MAX:           1665 [pixels]
  Y_MAX:           1801 [pixels]
  DET_THRESH:      9
  PHOTO_THRESH:    4
  SL_URL:          sw00337115000msufc0326.fits
  SUN_POSTN:       258.93d {+17h 15m 43s}  -23.05d {-23d 02' 50"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.72d {+03h 58m 52s}  +25.31d {+25d 18' 25"}
  MOON_DIST:       104.91 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 12:01:04 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 13"} (J2000)
  POINT_ROLL:      260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42817.53 SOD {11:53:37.53} UT,   326.8 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        1.163
  N_STARS:         47
  X_OFFSET:        226 [pixels]
  Y_OFFSET:        362 [pixels]
  X_MAX:           1665 [pixels]
  Y_MAX:           1801 [pixels]
  DET_THRESH:      9
  PHOTO_THRESH:    4
  SL_URL:          sw00337115000msufc0326.fits
  SUN_POSTN:       258.93d {+17h 15m 44s}  -23.05d {-23d 02' 50"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.72d {+03h 58m 53s}  +25.31d {+25d 18' 29"}
  MOON_DIST:       104.92 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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:     Thu 11 Dec 08 12:01:53 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 13"} (J2000)
  ROLL:            260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42817.53 SOD {11:53:37.53} UT,   326.8 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     250689220
  X_OFFSET:        785 [pixels]
  Y_OFFSET:        921 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       945
  Y_GRB_POS:       1081
  BINNING_INDEX:   1
  IM_URL:          sw00337115000msuni0326.fits
  SUN_POSTN:       258.93d {+17h 15m 44s}  -23.05d {-23d 02' 50"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.73d {+03h 58m 56s}  +25.31d {+25d 18' 34"}
  MOON_DIST:       104.93 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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 11 Dec 08 12:02:22 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 13"} (J2000)
  ROLL:            260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42817.53 SOD {11:53:37.53} UT,   326.8 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     250689220
  X_OFFSET:        785 [pixels]
  Y_OFFSET:        921 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       945
  Y_GRB_POS:       1081
  BINNING_INDEX:   1
  IM_URL:          sw00337115000msuni0326.fits
  SUN_POSTN:       258.93d {+17h 15m 44s}  -23.05d {-23d 02' 50"}
  SUN_DIST:         60.78 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.74d {+03h 58m 57s}  +25.31d {+25d 18' 37"}
  MOON_DIST:       104.93 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 12:06:45 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     337115,   Seg_Num: 0
  GRB_RA:          328.1161d {+21h 52m 27.86s} (J2000),
                   328.2483d {+21h 53m 00.41s} (current),
                   327.3755d {+21h 49m 30.12s} (1950)
  GRB_DEC:         -33.8361d {-33d 50' 09.9"} (J2000),
                   -33.7938d {-33d 47' 37.6"} (current),
                   -34.0715d {-34d 04' 17.5"} (1950)
  GRB_ERROR:       2.3 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  42612.00 SOD {11:50:12.00} UT,   121.3 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       258.94d {+17h 15m 45s}  -23.05d {-23d 02' 51"}
  SUN_DIST:         60.80 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.79d {+03h 59m 09s}  +25.32d {+25d 19' 05"}
  MOON_DIST:       104.95 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.75,-51.17 [deg] galactic lon,lat of the burst
  ECL_COORDS:      318.50,-19.65 [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:        This position was enhanced using UVOT field astrometry  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 12:06:57 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 14"} (J2000)
  POINT_ROLL:      260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  43349.19 SOD {12:02:29.19} UT,   858.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.334
  N_STARS:         79
  X_OFFSET:        226 [pixels]
  Y_OFFSET:        362 [pixels]
  X_MAX:           1665 [pixels]
  Y_MAX:           1801 [pixels]
  DET_THRESH:      17
  PHOTO_THRESH:    10
  SL_URL:          sw00337115000msufc0858.fits
  SUN_POSTN:       258.94d {+17h 15m 45s}  -23.05d {-23d 02' 51"}
  SUN_DIST:         60.77 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.79d {+03h 59m 10s}  +25.32d {+25d 19' 06"}
  MOON_DIST:       104.98 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 11 Dec 08 12:07:26 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 14"} (J2000)
  POINT_ROLL:      260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  43349.19 SOD {12:02:29.19} UT,   858.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.334
  N_STARS:         79
  X_OFFSET:        226 [pixels]
  Y_OFFSET:        362 [pixels]
  X_MAX:           1665 [pixels]
  Y_MAX:           1801 [pixels]
  DET_THRESH:      17
  PHOTO_THRESH:    10
  SL_URL:          sw00337115000msufc0858.fits
  SUN_POSTN:       258.94d {+17h 15m 45s}  -23.05d {-23d 02' 51"}
  SUN_DIST:         60.77 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.80d {+03h 59m 11s}  +25.32d {+25d 19' 09"}
  MOON_DIST:       104.98 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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:     Thu 11 Dec 08 12:08:52 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 14"} (J2000)
  ROLL:            260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  43349.19 SOD {12:02:29.19} UT,   858.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     250689752
  X_OFFSET:        785 [pixels]
  Y_OFFSET:        921 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       945
  Y_GRB_POS:       1081
  BINNING_INDEX:   1
  IM_URL:          sw00337115000msuni0858.fits
  SUN_POSTN:       258.94d {+17h 15m 45s}  -23.05d {-23d 02' 52"}
  SUN_DIST:         60.77 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.81d {+03h 59m 15s}  +25.32d {+25d 19' 18"}
  MOON_DIST:       104.99 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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 11 Dec 08 12:09:08 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     337115,   Seg_Num: 0
  POINT_RA:        328.083d {+21h 52m 20s} (J2000)
  POINT_DEC:       -33.821d {-33d 49' 14"} (J2000)
  ROLL:            260.574d
  IMG_START_DATE:  14811 TJD;   346 DOY;   08/12/11
  IMG_START_TIME:  43349.19 SOD {12:02:29.19} UT,   858.5 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     250689752
  X_OFFSET:        785 [pixels]
  Y_OFFSET:        921 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       945
  Y_GRB_POS:       1081
  BINNING_INDEX:   1
  IM_URL:          sw00337115000msuni0858.fits
  SUN_POSTN:       258.94d {+17h 15m 45s}  -23.05d {-23d 02' 52"}
  SUN_DIST:         60.77 [deg]   Sun_angle= -4.6 [hr] (East of Sun)
  MOON_POSTN:       59.81d {+03h 59m 16s}  +25.32d {+25d 19' 20"}
  MOON_DIST:       105.00 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       11.78,-51.14 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      318.48,-19.63 [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.  
  

  
• GCN Circular #8653
  H. A. Krimm (CRESST/GSFC/USRA), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), P.A. Curran (MSSL-UCL), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), O. Godet (U Leicester), C. Guidorzi (U Ferrara), S. T. Holland (CRESST/USRA/GSFC), S. D. Hunsberger (PSU), N. P. M. Kuin (MSSL), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), A. M. Parsons (GSFC), P. Romano (INAF-IASFPA), R. L. C. Starling (U Leicester), T. N. Ukwatta (GSFC/GWU) and H. Ziaeepour (UCL-MSSL) report on behalf of the Swift Team:
  At 11:48:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 081211 (trigger=337115). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 328.087, -33.815 which is

     RA(J2000) = 21h 52m 21s
     Dec(J2000) = -33d 48' 53"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a weak structure with a duration of about ~20 sec. The peak count rate was ~400 counts/sec (15-350 keV), at ~0 sec after the trigger.
  The XRT began observing the field at 11:50:00.6 UT, 109.9 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 328.1161, -33.8361 which is equivalent to:

     RA(J2000)  = 21h 52m 27.85s
     Dec(J2000) = -33d 50' 09.8"
  

  with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 115 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 (1.87e+20 cm^-2, Kalberla et al. 2005), with an excess column of 1.9 (+2.21/-1.92) x 10^21 cm^-2 (90% confidence).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 114 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 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.03.
  Burst Advocate for this burst is H. A. Krimm (krimm AT milkyway.gsfc.nasa.gov). 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 #8655
  A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
  Using 2165 s of XRT Photon Counting mode data and 3 UVOT images for GRB 081211, 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 = 328.1163, -33.8364 which is equivalent to:

  RA (J2000): 21h 52m 27.91s
  Dec (J2000): -33d 50' 10.9"
  

  with an uncertainty of 1.6 arcsec (radius, 90% confidence).
  This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401 http://www.swift.ac.uk/xrt_positions/Goad.pdf), the current algorithm is an extension of this method.
  This circular was automatically generated, and is an official product of the Swift-XRT team.
• GCN Circular #8656
  S. Immler (CRESST/UMD/GSFC), S. T. Holland (CRESST/USRA/GSFC), and H. A. Krimm (CRESST/GSFC/USRA) report on behalf of the Swift UVOT team:
  Further analysis of Swift Ultraviolet/Optical Telescope (UVOT) data of GRB 081211 (Krimm et al., GCN Circ. 8653), starting 113 sec after the BAT trigger, gives a detection of an optical source within the enhanced Swift-XRT position (Beardmore et al., GCN Circ. 8655) at

       RA (J2000)  21:52:27.97 = 328.11654 (deg)
       Dec (J2000) -33:50:08.3 = -33.83565 (deg)
  

  with an uncertainty of 0.7 arcseconds (radius, 90% containment) in the white filters at 4.5-sigma level of confidence. The source is not present in DSS, the USNO-B1.0 catalogue, or the 2MASS point source catalogue. It is not detected in any of the other UVOT filters at the limiting magnitudes reported below.

  Filter Tstart(s) Tstop(s)  Exp(s)  Magnitude
  
  wh     113       7134     588      21.23+/-0.39
  u      326       6724     265      >20.23  (3-sigma UL)
  b      582        741     293      >20.24  (3-sigma UL)
  uvw2   632       7318     371      >20.40  (3-sigma UL)
  v      656      11966     386      >19.38  (3-sigma UL)
  uvm2   681       6314     136      >19.58  (3-sigma UL)
  uvw1   706       6519     196      >19.87  (3-sigma UL)
  

  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 along the line of sight which corresponds to a reddening of E(B-V)=0.077 mag (Schlegel et al. 1998).
• GCN Circular #8657
  R.L.C. Starling (U. Leicester) and H.A. Krimm (CRESST/GSFC/USRA) report on behalf of the Swift XRT team:
  We have analysed data from the first 2 orbits of Swift XRT observations of GRB 081211 (trigger=337115, Krimm et al. GCN Circular 8653) from 113 s to 24 ks after the BAT trigger, all collected in Photon Counting (PC) mode.
  The enhanced Swift XRT position for this GRB is given in Beardmore et al. (GCN Circular 8655).
  We confirm that the source is fading, however, the light curve is not well constrained at present. A power law fit results in a decay slope of alpha=0.6+/-0.1, but we note that flaring may be present from 350-1000 s.
  The time-averaged spectrum can be fit with an absorbed power law with photon index Gamma=2.4+/-0.3. There is significant absorption above the Galactic value (nH_Gal=1.9e20 cm^-2, Kalberla et al. 2005) amounting to a column of nH=(1.2+/-0.6)e21 cm^-2 (at z=0). The observed (unabsorbed) 0.3-10 keV flux is 3.1 (5.0) e-12 erg cm^-2 s^-1. The observed (unabsorbed) count rate to flux conversion derived from this spectrum is 1 count s^-1 = 3.3 (5.3) e-11 erg cm^-2. The predicted count rate at T+24h, assuming a decay of alpha=0.6, is 0.01 count s^-1.
  The results of the XRT automatic analysis are available at http://www.swift.ac.uk/xrt_products/00337115.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #8658
  

  TITLE:   GCN CIRCULAR
  NUMBER:  8658
  SUBJECT: GRB 081211: Swift-BAT refined analysis
  DATE:    08/12/11 22:42:23 GMT
  FROM:    Hans Krimm at NASA-GSFC  
  

  Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 081211 (trigger #337115) (Krimm, et al., GCN Circ. 8653). The BAT ground-calculated position is RA, Dec = 328.082, -33.818 deg which is

     RA(J2000)  =  21h 52m 19.7s
     Dec(J2000) = -33d 49' 05.9"
  

  with an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 42%.
  The mask-weighted light curve shows a single weak peak extending in time from T-1 to T+3 seconds. There is a possible precursor at ~T-180 sec. T90 (15-350 keV) is 3.5 +- 0.9 sec (estimated error including systematics).
  The time-averaged spectrum from T-1.1 to T+2.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.34 +- 0.41. The fluence in the 15-150 keV band is 1.3 +- 0.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.19 sec in the 15-150 keV band is 0.8 +- 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/337115/BA/
• GCN Report 187.1
  GCN_Report 187.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_187_1.pdf by H.A. Krimm at CRESST/GSFC/USRA titled: "Final Swift observations of GRB 081211A"