Gamma-ray Burst 111204A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:38:45 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     509018,   Seg_Num: 0
  GRB_RA:          336.641d {+22h 26m 34s} (J2000),
                   336.810d {+22h 27m 14s} (current),
                   335.932d {+22h 23m 44s} (1950)
  GRB_DEC:         -31.395d {-31d 23' 41"} (J2000),
                   -31.334d {-31d 20' 01"} (current),
                   -31.650d {-31d 38' 58"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       0 [cnts]    Image_Peak=1269 [image_cnts]
  TRIGGER_DUR:     64.000 [sec] 
  TRIGGER_INDEX:   20000     E_range: 15-50 keV
  BKG_INTEN:       0 [cnts]
  BKG_TIME:        0.00 SOD {00:00:00.00} UT
  BKG_DUR:         0 [sec]
  GRB_DATE:        15899 TJD;   338 DOY;   11/12/04
  GRB_TIME:        49048.35 SOD {13:37:28.35} UT
  GRB_PHI:         -155.24 [deg]
  GRB_THETA:        31.51 [deg]
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    7.23 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +6  +1  -3  +0  +0 -24  +0 
  SUN_POSTN:       250.55d {+16h 42m 11s}  -22.23d {-22d 13' 57"}
  SUN_DIST:         75.62 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.47d {+00h 13m 53s}   +6.91d {+06d 54' 38"}
  MOON_DIST:        45.96 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.41,-58.26 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      326.55,-20.08 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 136.08,-20.13 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:41:44 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     509018,   Seg_Num: 0
  GRB_RA:          336.641d {+22h 26m 34s} (J2000),
                   336.810d {+22h 27m 14s} (current),
                   335.932d {+22h 23m 44s} (1950)
  GRB_DEC:         -31.395d {-31d 23' 41"} (J2000),
                   -31.334d {-31d 20' 01"} (current),
                   -31.650d {-31d 38' 58"} (1950)
  GRB_DATE:        15899 TJD;   338 DOY;   11/12/04
  GRB_TIME:        49048.35 SOD {13:37:28.35} UT
  TRIGGER_INDEX:   20000
  GRB_PHI:         -155.24 [deg]
  GRB_THETA:        31.51 [deg]
  DELTA_TIME:      0.00 [sec]
  TRIGGER_DUR:     64.000 [sec] 
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    7.23 [sigma]
  LC_URL:          sw00509018000msb.lc
  SUN_POSTN:       250.55d {+16h 42m 12s}  -22.23d {-22d 13' 58"}
  SUN_DIST:         75.62 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.49d {+00h 13m 59s}   +6.92d {+06d 55' 11"}
  MOON_DIST:        45.98 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.41,-58.26 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      326.55,-20.08 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is an image trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 136.08,-20.13 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:42:43 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.653d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.391d {-31d 23' 26"} (J2000)
  POINT_ROLL:      252.544d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49191.78 SOD {13:39:51.78} UT,   143.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        3.117
  N_STARS:         32
  X_OFFSET:        540 [pixels]
  Y_OFFSET:        487 [pixels]
  X_MAX:           1499 [pixels]
  Y_MAX:           1446 [pixels]
  DET_THRESH:      15
  PHOTO_THRESH:    8
  SL_URL:          sw00509018000msufc0143.fits
  SUN_POSTN:       250.55d {+16h 42m 12s}  -22.23d {-22d 13' 59"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.50d {+00h 14m 01s}   +6.92d {+06d 55' 22"}
  MOON_DIST:        45.97 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.42,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:43:10 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.653d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.391d {-31d 23' 26"} (J2000)
  POINT_ROLL:      252.544d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49191.78 SOD {13:39:51.78} UT,   143.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        3.117
  N_STARS:         32
  X_OFFSET:        540 [pixels]
  Y_OFFSET:        487 [pixels]
  X_MAX:           1499 [pixels]
  Y_MAX:           1446 [pixels]
  DET_THRESH:      15
  PHOTO_THRESH:    8
  SL_URL:          sw00509018000msufc0143.fits
  SUN_POSTN:       250.55d {+16h 42m 12s}  -22.23d {-22d 13' 59"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.51d {+00h 14m 01s}   +6.92d {+06d 55' 26"}
  MOON_DIST:        45.98 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.42,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:44:12 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     509018,   Seg_Num: 0
  GRB_RA:          336.6289d {+22h 26m 30.93s} (J2000),
                   336.7977d {+22h 27m 11.43s} (current),
                   335.9197d {+22h 23m 40.73s} (1950)
  GRB_DEC:         -31.3750d {-31d 22' 30.0"} (J2000),
                   -31.3140d {-31d 18' 50.4"} (current),
                   -31.6299d {-31d 37' 47.5"} (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:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49208.00 SOD {13:40:08.00} UT,   159.7 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       250.55d {+16h 42m 12s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.62 [deg]   Sun_angle= -5.7 [hr] (East of Sun)
  MOON_POSTN:        3.51d {+00h 14m 03s}   +6.93d {+06d 55' 38"}
  MOON_DIST:        45.98 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.45,-58.25 [deg] galactic lon,lat of the burst
  ECL_COORDS:      326.55,-20.06 [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:     Sun 04 Dec 11 13:44:30 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.653d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.391d {-31d 23' 26"} (J2000)
  ROLL:            252.544d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49191.78 SOD {13:39:51.78} UT,   143.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     344698799
  X_OFFSET:        859 [pixels]
  Y_OFFSET:        806 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1019
  Y_GRB_POS:       966
  BINNING_INDEX:   1
  IM_URL:          sw00509018000msuni0151.fits
  SUN_POSTN:       250.55d {+16h 42m 13s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.52d {+00h 14m 04s}   +6.93d {+06d 55' 41"}
  MOON_DIST:        45.98 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.42,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:44:44 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.653d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.391d {-31d 23' 26"} (J2000)
  ROLL:            252.544d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49191.78 SOD {13:39:51.78} UT,   143.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     344698799
  X_OFFSET:        859 [pixels]
  Y_OFFSET:        806 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1019
  Y_GRB_POS:       966
  BINNING_INDEX:   1
  IM_URL:          sw00509018000msuni0151.fits
  SUN_POSTN:       250.55d {+16h 42m 13s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.52d {+00h 14m 04s}   +6.93d {+06d 55' 43"}
  MOON_DIST:        45.99 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.42,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:44:56 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.654d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.387d {-31d 23' 13"} (J2000)
  POINT_ROLL:      252.545d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49349.99 SOD {13:42:29.99} UT,   301.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.094
  N_STARS:         25
  X_OFFSET:        300 [pixels]
  Y_OFFSET:        247 [pixels]
  X_MAX:           1739 [pixels]
  Y_MAX:           1686 [pixels]
  DET_THRESH:      4
  PHOTO_THRESH:    2
  SL_URL:          sw00509018000msufc0301.fits
  SUN_POSTN:       250.55d {+16h 42m 13s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.52d {+00h 14m 05s}   +6.93d {+06d 55' 46"}
  MOON_DIST:        45.98 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.43,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:45:18 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.654d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.387d {-31d 23' 13"} (J2000)
  POINT_ROLL:      252.545d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49349.99 SOD {13:42:29.99} UT,   301.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.094
  N_STARS:         25
  X_OFFSET:        300 [pixels]
  Y_OFFSET:        247 [pixels]
  X_MAX:           1739 [pixels]
  Y_MAX:           1686 [pixels]
  DET_THRESH:      4
  PHOTO_THRESH:    2
  SL_URL:          sw00509018000msufc0301.fits
  SUN_POSTN:       250.55d {+16h 42m 13s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.52d {+00h 14m 05s}   +6.93d {+06d 55' 50"}
  MOON_DIST:        45.99 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.43,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:46:26 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.654d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.387d {-31d 23' 13"} (J2000)
  ROLL:            252.545d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49349.99 SOD {13:42:29.99} UT,   301.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     344698957
  X_OFFSET:        859 [pixels]
  Y_OFFSET:        806 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1019
  Y_GRB_POS:       966
  BINNING_INDEX:   1
  IM_URL:          sw00509018000msuni0309.fits
  SUN_POSTN:       250.55d {+16h 42m 13s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.53d {+00h 14m 07s}   +6.93d {+06d 56' 02"}
  MOON_DIST:        45.99 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.43,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 04 Dec 11 13:46:47 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     509018,   Seg_Num: 0
  POINT_RA:        336.654d {+22h 26m 37s} (J2000)
  POINT_DEC:       -31.387d {-31d 23' 13"} (J2000)
  ROLL:            252.545d
  IMG_START_DATE:  15899 TJD;   338 DOY;   11/12/04
  IMG_START_TIME:  49349.99 SOD {13:42:29.99} UT,   301.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     344698957
  X_OFFSET:        859 [pixels]
  Y_OFFSET:        806 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1019
  Y_GRB_POS:       966
  BINNING_INDEX:   1
  IM_URL:          sw00509018000msuni0309.fits
  SUN_POSTN:       250.55d {+16h 42m 13s}  -22.23d {-22d 14' 00"}
  SUN_DIST:         75.63 [deg]   Sun_angle= -5.8 [hr] (East of Sun)
  MOON_POSTN:        3.53d {+00h 14m 08s}   +6.93d {+06d 56' 06"}
  MOON_DIST:        46.00 [deg]
  MOON_ILLUM:      70 [%]
  GAL_COORDS:       16.43,-58.27 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      326.56,-20.08 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN Circular #12612
  E. Sonbas (GSFC/USRA/Adiyaman Univ.), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), D. N. Burrows (PSU), S. Campana (INAF-OAB), N. Gehrels (NASA/GSFC), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU), C. A. Swenson (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
  At 13:37:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 111204A (trigger=509018). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 336.641, -31.395 which is

     RA(J2000) = 22h 26m 34s
     Dec(J2000) = -31d 23' 41"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a double-peaked structure with a duration of about 80 sec. The peak count rate was ~400 counts/sec (15-350 keV), at ~50 sec after the trigger.
  The XRT began observing the field at 13:40:08.0 UT, 159.7 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 336.62912, -31.37514 which is equivalent to:

     RA(J2000)  = 22h 26m 30.99s
     Dec(J2000) = -31d 22' 30.5"
  

  with an uncertainty of 3.8 arcseconds (radius, 90% containment). This location is 80 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 consistent with the Galactic value of 1.08 x 10^20 cm^-2 (Kalberla et al. 2005).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 143 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 34% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. 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 0.01.
  Burst Advocate for this burst is E. Sonbas (eda.sonbas AT 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 #12614
  A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
  Using 175 s of XRT Photon Counting mode data and 1 UVOT images for GRB 111204A, 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 = 336.62848, -31.37479 which is equivalent to:

  RA (J2000): 22h 26m 30.84s
  Dec (J2000): -31d 22' 29.3"
  

  with an uncertainty of 2.1 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 #12616
  A.V. Parhomenko, A. Tlatov, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
  K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev,E.Konstantinov, Irkutsk State University
  E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov, D.Zimnukhov, M. Kornilov,A.Sankovich Sternberg Astronomical Institute, Moscow State University
  V.Krushinski, I.Zalozhnich, T.Kopytova, A. Popov Ural State University, Kourovka
  V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina Blagoveschensk Educational State University, Blagoveschensk
  MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Kislovodsk was pointed to the GRB111204A (Sonbas et al., GCN Circ 12612) 115 sec after GRB trigger time after sunset. Unfortunately our first (20s exposure) images are saturated.
  The first unsaturated images was 2828 sec after GRB time at 2011-12-04 14:24:36.065 UT. On our 180s exposure white+polarizator set we haven`t found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 15.0 mag.
  Our coaded image (started at 2011-12-04 15:00:58 UT, 3240s effective exposition) has limit 19.2 mag.
  The message may be cited.
• GCN Circular #12618
  S. R. Oates (MSSL-UCL) and E. Sonbas (GSFC/USRA/Adiyaman_Univ.) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 111204A 143 s after the BAT trigger (Sonbas et al., GCN Circ. 12612). No optical afterglow consistent with the XRT position (Beardmore et al., GCN Circ. 12614) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:

  Filter         T_start(s)   T_stop(s)      Exp(s)         Mag
  
  white_FC           143          293          147         >20.4
  white              143         5439          541         >21.6
  v                 4214         5851          393         >19.6
  b                 3599        11889         1054         >20.8
  u                  302        11204         1116         >21.3
  w1                4624        10291         1133         >20.7
  m2                4419        15631          869         >21.1
  w2                4009         5646          393         >20.8
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #12620
  C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), E. Sonbas (GSFC/USRA/Adiyaman Univ.), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
  Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 111204A (trigger #509018) (Sonbas, et al., GCN Circ. 12612). The BAT ground-calculated position is RA, Dec = 336.651, -31.414 deg which is

     RA(J2000)  =  22h 26m 36.2s
     Dec(J2000) = -31d 24' 49.4"
  

  with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 75%.
  The mask-weighted light curve shows two peaks. Initial peak starts at the trigger time and last until ~T+10 sec. The second broad peak starts at ~T+43 sec, peaks at ~T+48 sec, and ends at ~T+90 sec. T90 (15-350 keV) is 48.0 +/- 22.6 sec (estimated error including systematics).
  The time-averaged spectrum from T+33.0 to T+81.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.83 +/- 0.30. The fluence in the 15-150 keV band is 4.7 +/- 0.9 x 10^-07 erg/cm2. The 1-sec peak photon flux measured from T+56.50 sec in the 15-150 keV band is 0.3 +/- 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/509018/BA/
• GCN Circular #12621
  M.C. Stroh (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), C. Pagani (U. Leicester), A.P. Beardmore (U. Leicester), V. D'Elia (ASDC), V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU) and E. Sonbas report on behalf of the Swift-XRT team:
  We have analysed 8.4 ks of XRT data for GRB 111204A (Sonbas et al. GCN Circ. 12612), from 157 s to 27.3 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Beardmore et al. (GCN. Circ 12614).
  The light curve can be modelled with a power-law decay with a decay index of alpha=1.86 (+0.31, -0.17).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.2 (+/-0.4). The best-fitting absorption column is 9 (+16, -8) x 10^20 cm^-2, consistent with the Galactic value of 1.1 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 6.0 x 10^-11 (6.4 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     9 (+16, -8) x 10^20 cm^-2
  Galactic foreground: 1.1 x 10^20 cm^-2
  Excess significance: <1.6 sigma
  Photon index:	     1.2 (+/-0.4)
  

  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00509018.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #12622
  D. A. Kann (Tautenburg Observatory), F. Olivares E., and J. Greiner, (both MPE Garching) report on behalf of the GROND team:
  We observed the field of GRB 111204A (Swift trigger 509018; Sonbas et al., GCN #12612) 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 on December 5, 2011, at 00:38 UT, 11 hours after the GRB trigger, during twilight. They were performed at an average seeing of 1".1 and at an airmass of 1.2 - 2.2.
  Based on co-added images of 5900 s integration time in g'r'i'z' and 4800 s in JHK, centered 0.5253 days after the trigger, no new sources within the enhanced 1".9 XRT error circle (RA = 22:26:30.81, Dec. = -31:22:29.3; Beardmore et al., GCN #12614, updated version from the Enhanced XRT Position page) are detected, and the following specific upper limits (all in the AB magnitude system) are found:

  g' > 24.5
  r' > 24.9
  i' > 24.4
  z' > 24.0
  J > 22.3
  H > 21.6
  K > 20.5
  

  Magnitudes were calibrated against GROND zeropoints in g'r'i'z' and 2MASS field stars in JHK. No corrections for the expected Galactic foreground extinction were made, which correspond to a reddening of E(B-V)=0.012 mag in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #12624
  D. Fugazza, S. Covino, A. Melandri (INAF-OAB), V. D'Elia (INAF-OAR), P. D'Avanzo, S. Campana, G. Tagliaferri (INAF-OAB) and E. Palazzi (INAF-IASFBo) on behalf of a larger collaboration report:
  We observed the field of GRB 111204A (Sonbas et al. GCN 12612) with the 3.6m TNG equipped with the NICS near-infrared camera. A sequence of JHK band images were acquired starting on Dec 04.792 UT (i.e. ~5.4 hours after the burst event) lasting 15, 10 and 20 minutes, respectively.
  We do not detect any object inside the enhanced XRT position (Beardmore et al. GCN 12614) down to the following limiting magnitudes (3sigma c.l., calibrated against the 2MASS catalogue):

  J > 19.7
  H > 18.8
  Ks > 18.8
  

  We thank the TNG staff for their support, in particular Luca di Fabrizio and Gianni Tessicini.
• GCN Report 354.1
  GCN_Report 354.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_354_1.pdf by E. Sonbas at GSFC/Adiyaman_U titled: "Final Swift Observations of GRB 111204A"