Gamma-ray Burst 060111B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:16:03 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     176918,   Seg_Num: 0
  GRB_RA:          286.337d {+19h 05m 21s} (J2000),
                   286.324d {+19h 05m 18s} (current),
                   286.443d {+19h 05m 46s} (1950)
  GRB_DEC:         +70.360d {+70d 21' 35"} (J2000),
                   +70.369d {+70d 22' 09"} (current),
                   +70.281d {+70d 16' 52"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       4603 [cnts]    Image_Peak=145 [image_cnts]
  TRIGGER_DUR:     1.024 [sec] 
  TRIGGER_INDEX:   155     E_range: 50-350 keV
  BKG_INTEN:       26910 [cnts]
  BKG_TIME:        72927.05 SOD {20:15:27.05} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        13746 TJD;    11 DOY;   06/01/11
  GRB_TIME:        72943.24 SOD {20:15:43.24} UT
  GRB_PHI:         113.46 [deg]
  GRB_THETA:        33.22 [deg]
  SOLN_STATUS:     0x83
  RATE_SIGNIF:     18.52 [sigma]
  IMAGE_SIGNIF:    6.97 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +0  +3  +6  +0  +0  +3  +1 
  SUN_POSTN:       293.21d {+19h 32m 49s}  -21.72d {-21d 43' 29"}
  SUN_DIST:         92.22 [deg]
  MOON_POSTN:       81.33d {+05h 25m 19s}  +28.07d {+28d 04' 16"}
  MOON_DIST:        79.95 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.34, 24.29 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:       39.78, 82.93 [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 = 227.88,17.41 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:17:43 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     176918,   Seg_Num: 0
  GRB_RA:          286.4266d {+19h 05m 42.3s} (J2000),
                   286.4135d {+19h 05m 39.2s} (current),
                   286.5332d {+19h 06m 07.9s} (1950)
  GRB_DEC:         +70.3770d {+70d 22' 37.1"} (J2000),
                   +70.3865d {+70d 23' 11.3"} (current),
                   +70.2980d {+70d 17' 52.8"} (1950)
  GRB_ERROR:       5.8 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.65e-09 [erg/cm2/sec]
  GRB_SIGNIF:      8.48 [sigma]
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73022.45 SOD {20:17:02.45} UT,   79.2 [sec] since BAT Trigger Time
  TAM[0-3]:        327.58 237.23 261.12 243.36
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       293.21d {+19h 32m 50s}  -21.72d {-21d 43' 28"}
  SUN_DIST:         92.24 [deg]
  MOON_POSTN:       81.35d {+05h 25m 23s}  +28.07d {+28d 04' 20"}
  MOON_DIST:        79.92 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.36, 24.26 [deg] galactic lon,lat of the burst
  ECL_COORDS:       39.80, 82.90 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        WARNING: XRT alignment calibration is on-going, and there may be  
  COMMENTS:        residual systematic offsets of several arcseconds not accounted for yet  
  COMMENTS:        by our on-board position determination algorithm.  We have increased  
  COMMENTS:        the estimated error circle radius to take this into account.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:17:44 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     176918,   Seg_Num: 0
  GRB_RA:          286.4266d {+19h 05m 42.3s} (J2000),
                   286.4135d {+19h 05m 39.2s} (current),
                   286.5332d {+19h 06m 07.9s} (1950)
  GRB_DEC:         +70.3770d {+70d 22' 37.1"} (J2000),
                   +70.3865d {+70d 23' 11.3"} (current),
                   +70.2980d {+70d 17' 52.8"} (1950)
  GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       72 [cnts]
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73022.45 SOD {20:17:02.45} UT,   79.2 [sec] since BAT Trigger Time
  CENTROID_X:      346.81,  raw= 347  [pixels]
  CENTROID_Y:      358.34,  raw= 358  [pixels]
  ROLL:            173.59 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   137.68
  GRB_POS_XRT_Z:   112.13
  IMAGE_URL:       sw00176918000msxim.img
  SUN_POSTN:       293.21d {+19h 32m 50s}  -21.72d {-21d 43' 28"}
  SUN_DIST:         92.24 [deg]
  MOON_POSTN:       81.35d {+05h 25m 23s}  +28.07d {+28d 04' 20"}
  MOON_DIST:        79.92 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.36, 24.26 [deg] galactic lon,lat of the burst
  ECL_COORDS:       39.80, 82.90 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.
  COMMENTS:        WARNING: XRT alignment calibration is on-going, and there may be
  COMMENTS:        residual systematic offsets of several arcseconds not accounted for yet
  COMMENTS:        by our on-board position determination algorithm.  We have increased
  COMMENTS:        the estimated error circle radius to take this into account.
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:18:28 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     176918,   Seg_Num: 0
  GRB_RA:          286.4266d {+19h 05m 42.3s} (J2000),
                   286.4135d {+19h 05m 39.2s} (current),
                   286.5332d {+19h 06m 07.9s} (1950)
  GRB_DEC:         +70.3770d {+70d 22' 37.1"} (J2000),
                   +70.3865d {+70d 23' 11.3"} (current),
                   +70.2980d {+70d 17' 52.8"} (1950)
  GRB_ERROR:       5.8 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       72 [cnts]
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73022.45 SOD {20:17:02.45} UT,   79.2 [sec] since BAT Trigger Time
  CENTROID_X:      346.81,  raw= 347  [pixels]
  CENTROID_Y:      358.34,  raw= 358  [pixels]
  ROLL:            173.59 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   137.68
  GRB_POS_XRT_Z:   112.13
  IMAGE_URL:       sw00176918000msxim.img
  SUN_POSTN:       293.21d {+19h 32m 50s}  -21.72d {-21d 43' 28"}
  SUN_DIST:         92.24 [deg]
  MOON_POSTN:       81.35d {+05h 25m 25s}  +28.07d {+28d 04' 22"}
  MOON_DIST:        79.92 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.36, 24.26 [deg] galactic lon,lat of the burst
  ECL_COORDS:       39.80, 82.90 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:21:21 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        286.319d {+19h 05m 17s} (J2000)
  POINT_DEC:       +70.343d {+70d 20' 35"} (J2000)
  POINT_ROLL:      173.586d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73026.54 SOD {20:17:06.54} UT,   83.3 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        1.240
  N_STARS:         56
  X_OFFSET:        131 [pixels]
  Y_OFFSET:        406 [pixels]
  X_MAX:           1090 [pixels]
  Y_MAX:           1365 [pixels]
  DET_THRESH:      9
  PHOTO_THRESH:    4
  SL_URL:          sw00176918000msufc0083.fits
  SUN_POSTN:       293.21d {+19h 32m 50s}  -21.72d {-21d 43' 27"}
  SUN_DIST:         92.21 [deg]
  MOON_POSTN:       81.38d {+05h 25m 32s}  +28.07d {+28d 04' 29"}
  MOON_DIST:        79.97 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.32, 24.29 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       39.67, 82.95 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:22:07 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        286.319d {+19h 05m 17s} (J2000)
  POINT_DEC:       +70.343d {+70d 20' 35"} (J2000)
  POINT_ROLL:      173.586d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73026.54 SOD {20:17:06.54} UT,   83.3 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        1.240
  N_STARS:         56
  X_OFFSET:        131 [pixels]
  Y_OFFSET:        406 [pixels]
  X_MAX:           1090 [pixels]
  Y_MAX:           1365 [pixels]
  DET_THRESH:      9
  PHOTO_THRESH:    4
  SL_URL:          sw00176918000msufc0083.fits
  SUN_POSTN:       293.21d {+19h 32m 50s}  -21.72d {-21d 43' 26"}
  SUN_DIST:         92.21 [deg]
  MOON_POSTN:       81.39d {+05h 25m 34s}  +28.08d {+28d 04' 31"}
  MOON_DIST:        79.97 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.32, 24.29 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       39.67, 82.95 [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:     Wed 11 Jan 06 20:29:12 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        286.316d {+19h 05m 16s} (J2000)
  POINT_DEC:       +70.341d {+70d 20' 27"} (J2000)
  POINT_ROLL:      173.583d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73233.07 SOD {20:20:33.07} UT,   289.8 [sec] since BAT Trigger Time
  FILTER:          9, B
  BKG_MEAN:        2.636
  N_STARS:         54
  X_OFFSET:        131 [pixels]
  Y_OFFSET:        406 [pixels]
  X_MAX:           1090 [pixels]
  Y_MAX:           1365 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00176918000msufc0289.fits
  SUN_POSTN:       293.22d {+19h 32m 52s}  -21.72d {-21d 43' 23"}
  SUN_DIST:         92.20 [deg]
  MOON_POSTN:       81.46d {+05h 25m 50s}  +28.08d {+28d 04' 49"}
  MOON_DIST:        79.98 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.31, 24.29 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       39.66, 82.95 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:29:49 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        286.316d {+19h 05m 16s} (J2000)
  POINT_DEC:       +70.341d {+70d 20' 27"} (J2000)
  POINT_ROLL:      173.583d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73233.07 SOD {20:20:33.07} UT,   289.8 [sec] since BAT Trigger Time
  FILTER:          9, B
  BKG_MEAN:        2.636
  N_STARS:         54
  X_OFFSET:        131 [pixels]
  Y_OFFSET:        406 [pixels]
  X_MAX:           1090 [pixels]
  Y_MAX:           1365 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00176918000msufc0289.fits
  SUN_POSTN:       293.22d {+19h 32m 52s}  -21.72d {-21d 43' 23"}
  SUN_DIST:         92.20 [deg]
  MOON_POSTN:       81.47d {+05h 25m 52s}  +28.08d {+28d 04' 51"}
  MOON_DIST:        79.98 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.31, 24.29 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       39.66, 82.95 [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:     Wed 11 Jan 06 20:30:40 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        286.316d {+19h 05m 16s} (J2000)
  POINT_DEC:       +70.341d {+70d 20' 27"} (J2000)
  ROLL:            173.583d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73233.07 SOD {20:20:33.07} UT,   289.8 [sec] since BAT Trigger Time
  FILTER:          9, B
  EXPOSURE_ID:     158703634
  X_OFFSET:        451 [pixels]
  Y_OFFSET:        726 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       611
  Y_GRB_POS:       886
  BINNING_INDEX:   1
  IM_URL:          sw00176918000msuni0289.fits
  SUN_POSTN:       293.22d {+19h 32m 52s}  -21.72d {-21d 43' 23"}
  SUN_DIST:         92.20 [deg]
  MOON_POSTN:       81.47d {+05h 25m 54s}  +28.08d {+28d 04' 53"}
  MOON_DIST:        79.98 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.31, 24.29 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       39.66, 82.95 [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:     Wed 11 Jan 06 20:31:18 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        286.316d {+19h 05m 16s} (J2000)
  POINT_DEC:       +70.341d {+70d 20' 27"} (J2000)
  ROLL:            173.583d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73233.07 SOD {20:20:33.07} UT,   289.8 [sec] since BAT Trigger Time
  FILTER:          9, B
  EXPOSURE_ID:     158703634
  X_OFFSET:        451 [pixels]
  Y_OFFSET:        726 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       611
  Y_GRB_POS:       886
  BINNING_INDEX:   1
  IM_URL:          sw00176918000msuni0289.fits
  SUN_POSTN:       293.22d {+19h 32m 52s}  -21.72d {-21d 43' 23"}
  SUN_DIST:         92.20 [deg]
  MOON_POSTN:       81.48d {+05h 25m 55s}  +28.08d {+28d 04' 55"}
  MOON_DIST:        79.98 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.31, 24.29 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       39.66, 82.95 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        If you have elected to receive attachments:  
  COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 20:19:29 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     176918,   Seg_Num: 0
  GRB_RA:          286.337d {+19h 05m 21s} (J2000),
                   286.324d {+19h 05m 18s} (current),
                   286.443d {+19h 05m 46s} (1950)
  GRB_DEC:         +70.360d {+70d 21' 35"} (J2000),
                   +70.369d {+70d 22' 09"} (current),
                   +70.281d {+70d 16' 52"} (1950)
  GRB_DATE:        13746 TJD;    11 DOY;   06/01/11
  GRB_TIME:        72943.24 SOD {20:15:43.24} UT
  TRIGGER_INDEX:   155
  GRB_PHI:         113.46 [deg]
  GRB_THETA:        33.22 [deg]
  DELTA_TIME:      -21.00 [sec]
  TRIGGER_DUR:     1.024 [sec] 
  LC_URL:          sw00176918000msb.lc
  SUN_POSTN:       293.21d {+19h 32m 50s}  -21.72d {-21d 43' 27"}
  SUN_DIST:         92.22 [deg]
  MOON_POSTN:       81.36d {+05h 25m 27s}  +28.07d {+28d 04' 25"}
  MOON_DIST:        79.95 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      101.34, 24.29 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:       39.78, 82.93 [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 = 227.88,17.41 [deg].  
  

  
• GCN Circular #4487
  M. Perri (ASDC), S. Barthelmy (GSFC), P. Boyd (GSFC), D. Burrows (PSU), J. Cummings (GSFC/NRC), N. Gehrels (GSFC), C. Gronwall (PSU), J. Kennea (PSU), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), F. Marshall (GSFC), D. Palmer (LANL), T. Sakamoto (GSFC) on behalf of the Swift team:
  At 20:15:43 UT, Swift-BAT triggered and located GRB 060111B (trigger=176918). The spacecraft slewed immediately. The BAT on-board calculated location is RA,Dec 286.337d,+70.360d {19h 05m 21s,+70d 21' 35"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). The BAT light curve shows a main peak with a total duration of at least 25 sec. There is a possible second peak at T+55 sec. The peak count rate was ~2000 counts/sec (15-350 keV), at ~2 seconds after the trigger.
  XRT began observing the field at 20:17:02 UT, 79 seconds after the BAT trigger. On-board centroiding found a previously uncatalogued fading X-ray source in the field of view at the following coordinates:

  RA(J2000) = 19 05 42.3
  Dec(J2000)= 70 22 37
  

  This location is 124 arcseconds from the BAT position. The estimated uncertainty is 8 arcseconds (90% confidence radius), including a systematic error of about 5 arcseconds due to an XRT boresight offset not currently corrected on-board. The initial flux was 1.7e-09 ergs/cm2/s (0.2-10 keV).
  UVOT took a finding chart exposure of 200 seconds with the B filter starting 84 seconds after the BAT trigger. There is a candidate afterglow in the list of sources generated on-board at (RA,DEC) (J2000) of (286.4270,70.3760) or (19h 05m 42.48s,+70d 22' 33.6") with a 1-sigma error radius of about 0.5 arc sec. This position is 3.6 arc sec. from the center of the XRT error circle. The estimated V magnitude is 17.2 with a 1-sigma error of about 0.5 mag. No correction has been made for the expected visual extinction of about 0.4 magnitudes. This source was detected in a 200 sec B finding chart image taken beginning at 20:20:34 UT with a B magnitude of 19.55. We did not receive the V finding chart through TDRSS, so are unable to confirm the V magnitude from the V parameterized source list.
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 21:16:48 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        352.463d {+23h 29m 51s} (J2000)
  POINT_DEC:       -40.010d {-40d 00' 34"} (J2000)
  POINT_ROLL:      271.533d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73981.92 SOD {20:33:01.92} UT,   1038.7 [sec] since BAT Trigger Time
  FILTER:          9, B
  BKG_MEAN:        1.845
  N_STARS:         44
  X_OFFSET:        131 [pixels]
  Y_OFFSET:        406 [pixels]
  X_MAX:           1090 [pixels]
  Y_MAX:           1365 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00176918000msufc1038.fits
  SUN_POSTN:       293.25d {+19h 33m 00s}  -21.72d {-21d 43' 04"}
  SUN_DIST:         53.04 [deg]
  MOON_POSTN:       81.93d {+05h 27m 42s}  +28.11d {+28d 06' 47"}
  MOON_DIST:       107.18 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      350.41,-68.76 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      335.38,-33.36 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Jan 06 21:17:08 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        352.463d {+23h 29m 51s} (J2000)
  POINT_DEC:       -40.010d {-40d 00' 34"} (J2000)
  POINT_ROLL:      271.533d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73981.92 SOD {20:33:01.92} UT,   1038.7 [sec] since BAT Trigger Time
  FILTER:          9, B
  BKG_MEAN:        1.845
  N_STARS:         44
  X_OFFSET:        131 [pixels]
  Y_OFFSET:        406 [pixels]
  X_MAX:           1090 [pixels]
  Y_MAX:           1365 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00176918000msufc1038.fits
  SUN_POSTN:       293.25d {+19h 33m 00s}  -21.72d {-21d 43' 04"}
  SUN_DIST:         53.04 [deg]
  MOON_POSTN:       81.93d {+05h 27m 43s}  +28.11d {+28d 06' 48"}
  MOON_DIST:       107.19 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      350.41,-68.76 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      335.38,-33.36 [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:     Wed 11 Jan 06 21:18:15 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        352.463d {+23h 29m 51s} (J2000)
  POINT_DEC:       -40.010d {-40d 00' 34"} (J2000)
  ROLL:            271.533d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73981.92 SOD {20:33:01.92} UT,   1038.7 [sec] since BAT Trigger Time
  FILTER:          9, B
  EXPOSURE_ID:     158704382
  X_OFFSET:        451 [pixels]
  Y_OFFSET:        726 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       611
  Y_GRB_POS:       886
  BINNING_INDEX:   1
  IM_URL:          sw00176918000msuni1038.fits
  SUN_POSTN:       293.25d {+19h 33m 01s}  -21.72d {-21d 43' 04"}
  SUN_DIST:         53.04 [deg]
  MOON_POSTN:       81.94d {+05h 27m 46s}  +28.11d {+28d 06' 50"}
  MOON_DIST:       107.20 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      350.41,-68.76 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      335.38,-33.36 [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:     Wed 11 Jan 06 21:18:37 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     176918,   Seg_Num: 0
  POINT_RA:        352.463d {+23h 29m 51s} (J2000)
  POINT_DEC:       -40.010d {-40d 00' 34"} (J2000)
  ROLL:            271.533d
  IMG_START_DATE:  13746 TJD;    11 DOY;   06/01/11
  IMG_START_TIME:  73981.92 SOD {20:33:01.92} UT,   1038.7 [sec] since BAT Trigger Time
  FILTER:          9, B
  EXPOSURE_ID:     158704382
  X_OFFSET:        451 [pixels]
  Y_OFFSET:        726 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       611
  Y_GRB_POS:       886
  BINNING_INDEX:   1
  IM_URL:          sw00176918000msuni1038.fits
  SUN_POSTN:       293.25d {+19h 33m 01s}  -21.72d {-21d 43' 04"}
  SUN_DIST:         53.04 [deg]
  MOON_POSTN:       81.94d {+05h 27m 47s}  +28.11d {+28d 06' 51"}
  MOON_DIST:       107.20 [deg]
  MOON_ILLUM:      94 [%]
  GAL_COORDS:      350.41,-68.76 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      335.38,-33.36 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        If you have elected to receive attachments:  
  COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.  
  

  
• GCN Circular #4488
  S.A. Yost, F. Yuan, H. Swan, C. Akerlof (U Mich), report on behalf of the ROTSE collaboration:
  ROTSE-IIId, located at the Turkish National Observatory at Bakirlitepe, Turkey, responded to GRB 060111B (Swift trigger 176918). The first image was at 20:16:12 UT, 29 s after the burst (9 s after the GCN notice time). The unfiltered images are calibrated relative to USNO A2.0.
  We detect an optical flare at the position of the UVOT optical counterpart (GCN 4487). It was observed initially at 13.0 mag, fading at least as rapidly as ~ t^-2.6. We detect it in 3 5-sec images and it has faded to or below the limiting magnitude of 15.5 in the 4th image at 69 sec post-burst.

  start UT    	mag     mlim(of image)
  ----------------------------------
  20:16:12     13.0     15.2
  20:16:52   >~15.5     15.5
  

  A jpeg image is available at http://www.rotse.net/images/gsb176918_3d00_img.jpg
  
• GCN Circular #4489
  Albert Sanchez Caso (Gualba observatory, Spain), Martin Jelinek and Alberto J. Castro-Tirado (IAA CSIC Granada) on behalf of a larger colaboration
  report:
  We have observed the field of GRB060111B (Perri et al., GCN 4487) with a 12" telescope at Gualba observatory in Spain. We do not detect the afterglow seen by Yost et al. (GCN 4488) on our 30x30s R-band combined image with mid-exposure time 21:59:40 UT (i.e. ~1.75h after the GRB) and 3-sigma limit 19.2.
  No further observations are expected from spanish ground-based telescopes due to technical and weather constraints.
  This message may be cited.
• GCN Circular #4492
  J. Tueller (GSFC), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cannizzo (GSFC-UMBC), L. Cominsky (Sonoma State U.), J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (GSFC/UMD), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS) on behalf of the Swift-BAT team:
  Using the partial data set (T-60.2 to T+122.9 sec) from the recent telemetry downlink, we report further analysis of BAT GRB 060111 (trigger #176918) (Perri, et al., GCN 4487). The BAT ground-calculated position is RA,Dec = 286.460,+70.382 deg {19h 5m 50.4s,+70d 22' 54.0"} (J2000) +- 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 29%.
  The mast-weighted lightcurve shows two peaks. The first one starts at T-4 sec, peaks at T+1, and extends out to T+28 sec. The second, smaller peak starts at T+53, peaks at T+55, and is over by T+62 sec. T90 (15-350 keV) is 59 +- 1) sec (estimated error including systematics).
  The power law index of the time-averaged spectrum (T-2 to T+63 sec) is 1.04 +- 0.17. The fluence in the 15-150 keV band is (1.6 +- 0.1) x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+0.36 sec in the 15-150 keV band is 1.4 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
• GCN Circular #4493
  I. Khamitov, K. Uluc, Z. Aslan (TUG), U. Kiziloglu (METU), E. Gogus (Sabanci Uni.), T. Saygac, O. Onal (Ist. Uni.), R. Burenin, M. Pavlinsky, R. Sunyaev (IKI), I. Bikmaev, N. Sakhibullin (KSU/AST)
  report:
  We observed field around position of optical counterpart (Perri et al., GCN4487, Yost et al, GCN4488) of GRB060111B (Swift trigger 176918) with Russian-Turkish 1.5-m telescope (RTT150, Bakyrlytepe, TUBITAK National Observatory, Turkey), starting at Jan. 12, 02:11UT, i.e. ~5.9 hours after the burst.
  A series of frames (13*300s exposures in R bands) were taken. We did not detect OT, but detect an extended source on about 5 arcsec NW from OT position with coordinates:

  RA=  19h05m43.0s  (J2000.0)
  DEC=+70d22'29."8  (J2000.0)
  

  Using USNO-B1 stars we estimate the following magnitude for this source: R=20.52+/-0.03, and limiting magnitude of combined image as: R~22.6
  The finding chart can be found at: http://www.tug.tubitak.gov.tr/~irekk/grb/grb060111b/grb060111B.JPG
  This message may be cited.
  
• GCN Circular #4495
  Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:
  We imaged the field of GRB 060111B detected by SWIFT (trigger 176918) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France.
  First image was acquired 28s after the GCN trigger (8s after the notice). The field elevation decreased from 28 degrees above horizon and weather conditions were good.
  We detected the OT source mentioned by Yost et al. (GCNC 4488) at the position (+/- 0.6 arcsec):

  RA(J2000.0) = 19 05 42.46
  DEC(J2000.0) +70 22 32.3
  

  OT was R~13.8 at 28s after GRB with a fading rate t^-1.74 (+/-0.1) until 200s.
  Magnitudes were estimated with the nearby USNO-B1 star: 1603-125792 (R=15.00).
  This message may be cited.
• GCN Circular #4496
  K. Yanagisawa (OAO/NAOJ), H. Toda, and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
  "We have observed the field of GRB 060111B (Perri et al. GCN 4487, Tueller et al. GCN 4492) with the three-color MITSuME 50 cm telescope at Okayama, Japan starting at 20:26:18 UT (T_burst+10.6 min) for an effective exposure of 45 min (60sec x 45).
  Comparison of the two stacked images

  at midtime 20:28:56 UT (T_burst+13.2min, exp=60sec x5)  and 
  at midtime 20:56:26 UT (T_burst+40.7min, exp=60sec x5) 
  

  revealed a fading object at the same location in the Rc and Ic band images. The coordinates of the fading object are:
  RA 19:05:42.47, DEC +70:22:33.1 (error = 0.3 arcsec)
  We identify this object as the optical afterglow of GRB 05111B for the following reasons: 1) these coordinates are consistent with those of the UVOT afterglow candidate by Perri et al. (GCN 4487), and 2) while we do not confirm the possible host galaxy noted by Khamitov et al. (GCN 4493) in our images, it is not likely to confuse our identification as it is 4.2 arcsec away.
  The magnitudes of the OT at midtime 20:28:56 UT (T_burst+13.2min) were following:

    　g': > 19.1 (3 sigma detection limit)
      Rc:   18.9 +/- 0.4
      Ic:   18.3 +/- 0.4
  

  The Rc and Ic magnitudes were calibrated with the R2 and I2 magnitudes of the USNO-B1.0 stars. The g' magnitudes was derived from the NOMAD B, V magnitudes using the formula by Smith et al. (2002).
  The images obtained at Okayama can be viewed at http://bragi.oao.nao.ac.jp/support/telescope/grb50/images/GRB060111B.pdf"
• GCN Circular #4498
  M. Perri (ASDC), A. Moretti (OAB), D. N. Burrows (PSU), R. Fink (GSFC), M. Ajello (MPE) report on behalf of the Swift XRT team:
  We have analyzed the first 6 orbits of XRT data from GRB 060111B (trigger 176918, GCN 4487). A ~13 ks Photon Counting mode image provides a refined XRT position:

  RA(J2000) =  19h 05m 42.23s,
  Dec(J2000) = +70d 22m 35.8s
  

  with an uncertainty of 3.6 arcsec (90% containment). This position is 1.1 arcsec away from the on-board XRT position (GCN 4487) and includes the latest XRT boresight correction. This position is 45 arcsec from the refined BAT position (Tueller et al., GCN 4492) and 3.0 arcsec from the optical afterglow reported by Yanagisawa et al. (GCN 4496).
  The X-ray light curve can be fit with a broken power-law with an initial decay slope of -4.0+/-0.4, a break at T+139+/-7 s, and a post-break slope of -1.1+/-0.1.
  A power-law fit to the X-ray spectrum from T+88s to T+425s gave a photon index of 2.1+/-0.3 and a column density of (2.0+/-0.9)e21 cm**-2. We note the Galactic hydrogen column density in the direction of the burst is 7.1e20cm**-2.
  If the burst continues decaying at the current rate we estimate an XRT count rate of 0.004 counts/s at T+24hr, which corresponds to an observed 0.3-10.keV flux of 2e-13 ergs cm**-2 s**-1.
• GCN Circular #4571
  G.Sato, K.Nakazawa, T.Takahashi (ISAS/JAXA), K.Yamaoka, S.Sugita (Aoyama Gakuin U.), Y.Terada (RIKEN), M.Ohno, T.Takahashi, Y.Fukazawa (Hiroshima U.), K.Abe, Y.Endo, S. Hong, K.Onda, M.Tashiro (Saitama U.), R.Miyawaki, M.Kokubun, K.Makishima (Univ. of Tokyo) and the HXD-II team
  The long burst, GRB 060111B (Swift-BAT trigger #176918; Perri et al., GCN 4487), triggered the Suzaku Wide-band All-sky Monitor (WAM) which is sensitive to an energy band of 50 keV - 5 MeV at 20:15:41 (UT). The WAM light curve exhibits a double peak structure with a duration (T90) of 25 seconds. The fluence in 100 - 1000 keV was (5.6 +/- 0.8)X10^-6 erg/cm2. The 1-s peak flux was 1.0 +/- 0.2 photons/cm2/s in the same energy range.
  Preliminary result shows that the time-averaged spectrum is well fitted by a single power law with a photon index of 1.5 +/- 0.3.
  All the quoted errors are at statistical 90% confidence level. The WAM in-flight calibration is still under way, and systematic errors, such as the flux calibration uncertainties of about 20%, are not included in the errors.
  The WAM light curve of this event is available at http://www.astro.isas.ac.jp/suzaku/research/HXD-WAM/WAM-GRB/grb/grb_table.html
  Further detailed analysis and the refinement are in progress.
• astro-ph/0604061 from 4 Apr 2006
  Klotz: Continuous optical monitoring during the prompt emission of GRB 060111B
  We present the time-resolved optical emission of GRB 060111B during its prompt phase, measured with the TAROT robotic observatory. This is the first time that the optical emission from a gamma-ray burst has been continuously monitored with a temporal resolution of a few seconds during the prompt gamma-ray phase. The temporal evolution of the prompt optical emission at the level of several seconds is used to provide a clue to the origin of this emission. The optical emission was found to decay steadily from our first measure, 28s after the trigger, in contrast to the gamma-ray emission, which exhibits strong variability at the same time. This behaviour strongly suggests that the optical emission is due to the reverse shock.
• astro-ph/0605016 from 30 Apr 2006
  Wei: The GRB early optical flash from internal shock: application to GRB990123, GRB041219a and GRB060111b
  With the successful launch of the Swift Gamma-Ray Burst Explorer, people expected the prompt optical flash like GRB990123 would be easily detected. However the fact that early optical flash have not been detected for a number of GRBs indicates the reverse shock must be suppressed. Here we explore the possibility that the optical flash may arise from the internal shock. We find that, under certain circumstance, the optical flash of GRB990123 and GRB060111b can really be explained by the internal shock. For GRB041219a, the prompt optical emission was correlated with the gamma-ray emission, we explain this feature also in the internal shock scenario, the optical emission is the low energy extension of the gamma-ray emission, and we can restrict its redshift $z\sim 0.2$. As for GRB050904, we have shown in previous paper that the optical flash was produced by synchrotron radiation and the X-ray flare was produced by the synchrotron-self-Compton mechanism. Therefore we conclude that the early optical flash of GRBs can usually come from the internal shock. Meanwhile since the condition to produce the optical flash is not easily satisfied, so the optical flash like GRB990123 should not be common in GRBs. In addition, we also discussed the synchrotron-self-Compton effect in the internal shock model, and find that for different values of parameters, there would be soft gamma-ray (100 KeV), hard gamma-ray (10 MeV) and GeV flare accompanying the optical flash. For GRB like GRB990123, a GeV flare with fluence about 10^{-8} erg cm^{-2} s^{-1} is expected, which may be detected by the GLAST satellite.
• GCN Circular #5820
  S. T. Holland (NASA/GSFC & USRA) reports on behalf of the UVOT team:
  The UVOT data for GRB 060111B (Perri, et al. 2006, GCN Circ. 4487) on January 11, 2006 has been reanalysed. We find the following magnitudes and 3-sigma upper limits in the early UVOT exposures. The start and stop times are relative to the BAT trigger time, 20:15:43 UT.

  Filter     Start   Stop   Exposure    Mag   Err
                (s)    (s)     (s)
  
  Early Exposures
      V          83    282     197      17.4   0.1
      V         542    562      19      18.0   3-sigma upper limit
      V         831   1031     197      19.4   3-sigma upper limit
      B         289    489     197      20.5   3-sigma upper limit
      B         638    658      19      18.9   3-sigma upper limit
      U         614    633      19      18.4   3-sigma upper limit
    UVW1        590    610      19      18.0   3-sigma upper limit
    UVM2       6017   6217     197      20.0   3-sigma upper limit
    UVW2        518    538      19      17.5   3-sigma upper limit
  White        494    514      19      19.4   3-sigma upper limit
  
  Coadded Esposures
      V         542  52472    2435      21.0   3-sigma upper limit
      B         638  70515    5861      22.4   3-sigma upper limit
      U         614  69818    6008      22.0   3-sigma upper limit
    UVW1        590  68905    4089      22.2   3-sigma upper limit
    UVM2        566  53170    3663      22.2   3-sigma upper limit
    UVW2        519  58952    3662      22.4   3-sigma upper limit
  White        494  64734    3696      22.2   3-sigma upper limit
  

  The values quoted above are not corrected for the expected Galactic extinction of E_{B-V} = 0.11 mag (Schlegel et al. 1998).
  These data supercede those reported in GCN Circ. 4487. We note that the B-band detection reported in GCN Circ. 4487 is not real, and the initial finding chart was taken with the V filter, not the B filter as previously reported. The UVOT team apologizes for these errors.