Gamma-ray Burst 121028A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:04:52 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     536897,   Seg_Num: 0
  GRB_RA:          271.923d {+18h 07m 42s} (J2000),
                   272.090d {+18h 08m 22s} (current),
                   271.272d {+18h 05m 05s} (1950)
  GRB_DEC:          -2.285d {-02d 17' 04"} (J2000),
                    -2.282d {-02d 16' 55"} (current),
                    -2.293d {-02d 17' 32"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       1860 [cnts]    Image_Peak=135 [image_cnts]
  TRIGGER_DUR:     0.512 [sec] 
  TRIGGER_INDEX:   41     E_range: 25-100 keV
  BKG_INTEN:       22953 [cnts]
  BKG_TIME:        18262.19 SOD {05:04:22.19} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        16228 TJD;   302 DOY;   12/10/28
  GRB_TIME:        18271.91 SOD {05:04:31.91} UT
  GRB_PHI:         -153.96 [deg]
  GRB_THETA:        40.15 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.66 [sigma]
  IMAGE_SIGNIF:    9.54 [sigma]
  MERIT_PARAMS:     +1  +0  +0  -1  +2  +0  +0  +1 -50  +0 
  SUN_POSTN:       212.89d {+14h 11m 34s}  -13.25d {-13d 14' 52"}
  SUN_DIST:         59.52 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.63d {+00h 58m 31s}   +9.80d {+09d 47' 46"}
  MOON_DIST:       102.74 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.85,  8.66 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      272.06, 21.14 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 71.64,7.76 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:06:57 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.944d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.274d {-02d 16' 25"} (J2000)
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18401.71 SOD {05:06:41.71} UT,   129.8 [sec] since BAT Trigger Time
  COUNTS:          2    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        1    Max_iter_allowed= 4
  ERROR_CODE:      1
  COMMENTS:        SWIFT-XRT Nack Position.  
  COMMENTS:        No source found in the image.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:08:08 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     536897,   Seg_Num: 0
  GRB_RA:          271.923d {+18h 07m 42s} (J2000),
                   272.090d {+18h 08m 22s} (current),
                   271.272d {+18h 05m 05s} (1950)
  GRB_DEC:          -2.285d {-02d 17' 04"} (J2000),
                    -2.282d {-02d 16' 55"} (current),
                    -2.293d {-02d 17' 32"} (1950)
  GRB_DATE:        16228 TJD;   302 DOY;   12/10/28
  GRB_TIME:        18271.91 SOD {05:04:31.91} UT
  TRIGGER_INDEX:   41
  GRB_PHI:         -153.96 [deg]
  GRB_THETA:        40.15 [deg]
  DELTA_TIME:      -11.00 [sec]
  TRIGGER_DUR:     0.512 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.66 [sigma]
  IMAGE_SIGNIF:    9.54 [sigma]
  LC_URL:          sw00536897000msb.lc
  SUN_POSTN:       212.90d {+14h 11m 35s}  -13.25d {-13d 14' 54"}
  SUN_DIST:         59.52 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.66d {+00h 58m 37s}   +9.80d {+09d 48' 17"}
  MOON_DIST:       102.77 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.85,  8.66 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      272.06, 21.14 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 71.64,7.76 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:15:50 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.273d {-02d 16' 21"} (J2000)
  POINT_ROLL:      255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18405.75 SOD {05:06:45.75} UT,   133.8 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        9.489
  N_STARS:         36
  X_OFFSET:        592 [pixels]
  Y_OFFSET:        431 [pixels]
  X_MAX:           1551 [pixels]
  Y_MAX:           1390 [pixels]
  DET_THRESH:      27
  PHOTO_THRESH:    17
  SL_URL:          sw00536897000msufc0133.fits
  SUN_POSTN:       212.90d {+14h 11m 36s}  -13.25d {-13d 15' 01"}
  SUN_DIST:         59.54 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.72d {+00h 58m 52s}   +9.83d {+09d 49' 32"}
  MOON_DIST:       102.81 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:16:11 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.273d {-02d 16' 21"} (J2000)
  POINT_ROLL:      255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18405.75 SOD {05:06:45.75} UT,   133.8 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        9.489
  N_STARS:         36
  X_OFFSET:        592 [pixels]
  Y_OFFSET:        431 [pixels]
  X_MAX:           1551 [pixels]
  Y_MAX:           1390 [pixels]
  DET_THRESH:      27
  PHOTO_THRESH:    17
  SL_URL:          sw00536897000msufc0133.fits
  SUN_POSTN:       212.90d {+14h 11m 36s}  -13.25d {-13d 15' 01"}
  SUN_DIST:         59.54 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.72d {+00h 58m 53s}   +9.83d {+09d 49' 35"}
  MOON_DIST:       102.81 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 28 Oct 12 05:18:27 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.273d {-02d 16' 21"} (J2000)
  ROLL:            255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18405.75 SOD {05:06:45.75} UT,   133.8 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     373093615
  X_OFFSET:        911 [pixels]
  Y_OFFSET:        750 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1071
  Y_GRB_POS:       910
  BINNING_INDEX:   1
  IM_URL:          sw00536897000msuni0143.fits
  SUN_POSTN:       212.90d {+14h 11m 37s}  -13.25d {-13d 15' 03"}
  SUN_DIST:         59.54 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.74d {+00h 58m 57s}   +9.83d {+09d 49' 57"}
  MOON_DIST:       102.83 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 28 Oct 12 05:18:46 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.273d {-02d 16' 21"} (J2000)
  ROLL:            255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18405.75 SOD {05:06:45.75} UT,   133.8 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     373093615
  X_OFFSET:        911 [pixels]
  Y_OFFSET:        750 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1071
  Y_GRB_POS:       910
  BINNING_INDEX:   1
  IM_URL:          sw00536897000msuni0143.fits
  SUN_POSTN:       212.90d {+14h 11m 37s}  -13.25d {-13d 15' 03"}
  SUN_DIST:         59.54 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.74d {+00h 58m 58s}   +9.83d {+09d 50' 00"}
  MOON_DIST:       102.83 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 28 Oct 12 05:22:43 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     536897,   Seg_Num: 0
  GRB_RA:          271.9006d {+18h 07m 36.14s} (J2000),
                   272.0678d {+18h 08m 16.26s} (current),
                   271.2489d {+18h 05m 00.26s} (1950)
  GRB_DEC:          -2.2938d {-02d 17' 37.6"} (J2000),
                    -2.2913d {-02d 17' 28.7"} (current),
                    -2.3015d {-02d 18' 05.2"} (1950)
  GRB_ERROR:       3.7 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18517.00 SOD {05:08:37.00} UT,   245.1 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       212.91d {+14h 11m 37s}  -13.25d {-13d 15' 07"}
  SUN_DIST:         59.49 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.77d {+00h 59m 06s}   +9.84d {+09d 50' 38"}
  MOON_DIST:       102.91 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.83,  8.67 [deg] galactic lon,lat of the burst
  ECL_COORDS:      272.04, 21.13 [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 2.8% < P(seren) < 6.6%.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:23:04 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 20"} (J2000)
  POINT_ROLL:      255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18617.87 SOD {05:10:17.87} UT,   346.0 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        2.343
  N_STARS:         7
  X_OFFSET:        352 [pixels]
  Y_OFFSET:        191 [pixels]
  X_MAX:           1791 [pixels]
  Y_MAX:           1630 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00536897000msufc0345.fits
  SUN_POSTN:       212.91d {+14h 11m 37s}  -13.25d {-13d 15' 07"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.78d {+00h 59m 06s}   +9.84d {+09d 50' 42"}
  MOON_DIST:       102.86 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:23:21 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 20"} (J2000)
  POINT_ROLL:      255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18617.87 SOD {05:10:17.87} UT,   346.0 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        2.343
  N_STARS:         7
  X_OFFSET:        352 [pixels]
  Y_OFFSET:        191 [pixels]
  X_MAX:           1791 [pixels]
  Y_MAX:           1630 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00536897000msufc0345.fits
  SUN_POSTN:       212.91d {+14h 11m 37s}  -13.25d {-13d 15' 07"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.78d {+00h 59m 07s}   +9.85d {+09d 50' 44"}
  MOON_DIST:       102.87 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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:     Sun 28 Oct 12 05:24:37 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 20"} (J2000)
  ROLL:            255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18617.87 SOD {05:10:17.87} UT,   346.0 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     373093827
  X_OFFSET:        911 [pixels]
  Y_OFFSET:        750 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1071
  Y_GRB_POS:       910
  BINNING_INDEX:   1
  IM_URL:          sw00536897000msuni0355.fits
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 08"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.79d {+00h 59m 10s}   +9.85d {+09d 50' 57"}
  MOON_DIST:       102.88 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 28 Oct 12 05:24:48 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 20"} (J2000)
  ROLL:            255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18617.87 SOD {05:10:17.87} UT,   346.0 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     373093827
  X_OFFSET:        911 [pixels]
  Y_OFFSET:        750 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1071
  Y_GRB_POS:       910
  BINNING_INDEX:   1
  IM_URL:          sw00536897000msuni0355.fits
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 08"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.79d {+00h 59m 10s}   +9.85d {+09d 50' 58"}
  MOON_DIST:       102.88 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        If you have elected to receive attachments:  
  COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:27:08 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 19"} (J2000)
  POINT_ROLL:      255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  19149.32 SOD {05:19:09.32} UT,   877.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.506
  N_STARS:         134
  X_OFFSET:        352 [pixels]
  Y_OFFSET:        191 [pixels]
  X_MAX:           1791 [pixels]
  Y_MAX:           1630 [pixels]
  DET_THRESH:      18
  PHOTO_THRESH:    10
  SL_URL:          sw00536897000msufc0877.fits
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 10"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.81d {+00h 59m 14s}   +9.86d {+09d 51' 21"}
  MOON_DIST:       102.90 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:27:35 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 19"} (J2000)
  POINT_ROLL:      255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  19149.32 SOD {05:19:09.32} UT,   877.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.506
  N_STARS:         134
  X_OFFSET:        352 [pixels]
  Y_OFFSET:        191 [pixels]
  X_MAX:           1791 [pixels]
  Y_MAX:           1630 [pixels]
  DET_THRESH:      18
  PHOTO_THRESH:    10
  SL_URL:          sw00536897000msufc0877.fits
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 11"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.81d {+00h 59m 15s}   +9.86d {+09d 51' 25"}
  MOON_DIST:       102.90 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 28 Oct 12 05:27:42 UT
  NOTICE_TYPE:     Swift-XRT Position UPDATE
  TRIGGER_NUM:     536897,   Seg_Num: 0
  GRB_RA:          271.8994d {+18h 07m 35.85s} (J2000),
                   272.0666d {+18h 08m 15.97s} (current),
                   271.2477d {+18h 04m 59.45s} (1950)
  GRB_DEC:          -2.2936d {-02d 17' 36.9"} (J2000),
                    -2.2911d {-02d 17' 28.0"} (current),
                    -2.3012d {-02d 18' 04.4"} (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:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  18517.00 SOD {05:08:37.00} UT,   245.1 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 11"}
  SUN_DIST:         59.48 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.81d {+00h 59m 16s}   +9.86d {+09d 51' 26"}
  MOON_DIST:       102.95 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.83,  8.67 [deg] galactic lon,lat of the burst
  ECL_COORDS:      272.03, 21.13 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
  COMMENTS:        TAM values, flux and significance fields are not valid.  
  COMMENTS:        This position was automatically generated on the ground using  
  COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
  COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
  COMMENTS:        This position was enhanced using UVOT field astrometry.  
  COMMENTS:        The probability that this is a serendipitous source in the  
  COMMENTS:        SPER window is 2.8% < P(seren) < 6.6%.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 28 Oct 12 05:28:40 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 19"} (J2000)
  ROLL:            255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  19149.32 SOD {05:19:09.32} UT,   877.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     373094359
  X_OFFSET:        911 [pixels]
  Y_OFFSET:        750 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1071
  Y_GRB_POS:       910
  BINNING_INDEX:   1
  IM_URL:          sw00536897000msuni0887.fits
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 12"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.82d {+00h 59m 17s}   +9.86d {+09d 51' 36"}
  MOON_DIST:       102.91 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 28 Oct 12 05:28:56 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     536897,   Seg_Num: 0
  POINT_RA:        271.943d {+18h 07m 46s} (J2000)
  POINT_DEC:        -2.272d {-02d 16' 19"} (J2000)
  ROLL:            255.935d
  IMG_START_DATE:  16228 TJD;   302 DOY;   12/10/28
  IMG_START_TIME:  19149.32 SOD {05:19:09.32} UT,   877.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     373094359
  X_OFFSET:        911 [pixels]
  Y_OFFSET:        750 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1071
  Y_GRB_POS:       910
  BINNING_INDEX:   1
  IM_URL:          sw00536897000msuni0887.fits
  SUN_POSTN:       212.91d {+14h 11m 38s}  -13.25d {-13d 15' 12"}
  SUN_DIST:         59.53 [deg]   Sun_angle= -3.9 [hr] (East of Sun)
  MOON_POSTN:       14.83d {+00h 59m 18s}   +9.86d {+09d 51' 38"}
  MOON_DIST:       102.91 [deg]
  MOON_ILLUM:      98 [%]
  GAL_COORDS:       25.87,  8.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      272.08, 21.15 [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 #13913
  R. L. C. Starling (U Leicester), C. Gronwall (PSU), H. A. Krimm (CRESST/GSFC/USRA), K. L. Page (U Leicester), D. M. Palmer (LANL), M. H. Siegel (PSU) and T. N. Ukwatta (MSU) report on behalf of the Swift Team:
  At 05:04:31 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 121028A (trigger=536897). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 271.923, -2.285 which is

    RA(J2000) = 18h 07m 42s
    Dec(J2000) = -02d 17' 04"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 30 sec. The peak count rate was ~2500 counts/sec (15-350 keV), at ~1 sec after the trigger.
  The XRT began observing the field at 05:06:41.7 UT, 129.8 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 271.8995, -2.2936 which is equivalent to:

     RA(J2000)  = 18h 07m 35.89s
     Dec(J2000) = -02d 17' 36.8"
  

  with an uncertainty of 2.3 arcseconds (radius, 90% containment). This location is 90 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 (2.48 x 10^21 cm^-2, Kalberla et al. 2005), with an excess column of 4.4 (+4.35/-3.23) x 10^21 cm^-2 (90% confidence).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 134 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 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.2 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 18.0 mag. No correction has been made for extinction.
  Due to the maintenance work at Goddard this weekend (GCN 13905) there may be a delay in receiving the full dataset, and thus refined analyses may not be available until late Sunday/early Monday.
  Burst Advocate for this burst is R. L. C. Starling (rlcs1 AT star.le.ac.uk). 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 #13914
  C. Guidorzi (U. Ferrara), A. Gomboc (U. Ljubljana), on behalf of a large collaboration report:
  The 2-m Faulkes Telescope North automatically began observing GRB 121028A (Starling et al. GCN Circ. 13913) on October 28 2012, 05:07:12 UT corresponding to 161 seconds post burst trigger with BVRi' filters. Within the XRT error circle we don't see any uncatalogued object down to the following limits:

  Mid time from       Exposure        Filter       Limit
  GRB (sec)           (s)
  -------------------------------------------------------
  198                3x10              R            > 19
  535                 10               i'           > 18
  -------------------------------------------------------
  

  Magnitudes are calibrated against nearby USNOB1 stars.
• GCN Circular #13915
  D. Kuroda, K. Yanagisawa, Y. Shimizu, H. Toda (OAO, NAOJ), S. Nagayama (NAOJ), M. Yoshida (Hiroshima), K. Ohta (Kyoto) and N. Kawai(Tokyo Tech) report on behalf of the MITSuME collaboration:
  We observed the field of GRB 121028A (Starling et al., GCNC 13913) with the optical three color (g', Rc and Ic) CCD camera attached to the MITSuME 50cm telescope of Okayama Astrophysical Observatory.
  The observation started on 2012-10-28 09:15:55 UT (~4.2 h after the burst). We did not find any new point source within the XRT circle (Starling et al., GCNC 13913) in all the three bands.
  Three sigma upper limits of the OT are listed below. We used GSC2.3 catalog for flux calibration.

  T0+[day]   MID-UT   T-EXP[sec]    g'     Rc     Ic
  ------------------------------------------------------
  0.21623    10:15:53    6360.0   >19.7  >19.4  >18.7
  ------------------------------------------------------
  T0+ : Elapsed time after the burst [day]
  T-EXP: Total Exposure time [sec]
  

• GCN Circular #13917
  T. Sakamoto (GSFC/UMBC), 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), C. B. Markwardt (GSFC), D. M. Palmer (LANL), A. M. Parsons (GSFC), G. Sato (ISAS), M. Stamatikos (OSU), R. L. C. Starling (U Leicester), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
  Using the data set from T-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 121028A (trigger #536897) (Starling, et al., GCN Circ. 13913). The BAT ground-calculated position is RA, Dec = 271.903, -2.298 deg, which is

     RA(J2000)  =  18h 07m 36.7s 
     Dec(J2000) = -02d 17' 52.1" 
  

  with an uncertainty of 1.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 50%.
  The mask-weighted light curve shows a single pulse starting at ~T-0.9 sec, peaking at ~T+2 sec, and ending ~T+4 sec. T90 (15-350 keV) is 3.8 +- 0.7 sec (estimated error including systematics).
  The time-averaged spectrum from T-0.8 to T+3.8 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.79 +- 0.17. The fluence in the 15-150 keV band is 3.7 +- 0.4 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.01 sec in the 15-150 keV band is 1.9 +- 0.3 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/536897/BA/
• GCN Circular #13918
  P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
  Using 2614 s of XRT Photon Counting mode data and 3 UVOT images for GRB 121028A, 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 = 271.89948, -2.29358 which is equivalent to:

  RA (J2000): 18h 07m 35.87s
  Dec (J2000): -02d 17' 36.9"
  

  with an uncertainty of 1.7 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 #13919
  K.L. Page (U. Leicester) and R. L. C. Starling (U Leicester) report on behalf of the Swift-XRT team:
  We have analysed 9.4 ks of XRT data for GRB 121028A (Starling et al. GCN Circ. 13913), from 139 s to 48.8 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 13918).
  The light curve can be modelled with a power-law decay with a decay index of alpha=0.87 (+/-0.07).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.63 (+0.26, -0.25). The best-fitting absorption column is 4.8 (+1.7, -1.4) x 10^21 cm^-2, in excess of the Galactic value of 2.5 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.6 x 10^-11 (7.9 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     4.8 (+1.7, -1.4) x 10^21 cm^-2
  Galactic foreground: 2.5 x 10^21 cm^-2
  Excess significance: 2.6 sigma
  Photon index:	     1.63 (+0.26, -0.25)
  

  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00536897.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #13924
  J. Wren, W.T. Vestrand, P. Wozniak, and H. Davis, of Los Alamos National Laboratory report:
  The RAPTOR network of robotic optical telescopes made observations of Swift trigger 536897 (Starling, et al., GCN 13913). The burst location was within the field of our wide-field monitor located in Maui, HI, which began a 10 s integration of the location at 05:04:32.5 UT, 0.6 s after the Swift trigger time and during the gamma-ray emitting interval including the time of peak emission detected by the BAT (Sakamoto, et al., GCN 13917). We detect no new object at the location of the refined Swift XRT location (Evans, et al., GCN 13918). Our 3-sigma limiting magnitude is 10.0 based on a comparison of our unfiltered image to the Tycho-2 V-band catalog.
• GCN Circular #13927
  M. Jelinek, A. J. Castro-Tirado (IAA-CSIC Granada), S. Guziy (Univ. of Nikolaev) and G. Bergond (CAHA Almer=EDa), on behalf of a larger collaboration, report:
  "Following the detection of GRB 121028A by Swift (Starling et al. GCNC 13913), we triggered the 3.5m CAHA telescope (+ Omega 2000) at the German-Spanish Calar Alto Observatory. Observations (900s each) were taken in the YJHK-bands, starting at 18:05 UT (i.e. 13 hr post burst). At the position of the X-ray afterglow (Evans et al. GCNC 13918), we do not detect a near-IR countepart in any band, particularly down to H =3D 20.5. "
  This message can be quoted.
• GCN Circular #13950
  M. H. Siegel (PSU) and R. L. C. Starling (U Leicester) report on behalf of the Swift/UVOT team.
  The Swift/UVOT began settled observations of the field of GRB 121028A 133s after the BAT trigger (Starling et al., GCN Circ. 13913). Data summed from the first and second orbits do not reveal a source at the enhanced position of the X-ray afterglow (Evans et al., GCN Circ. 13918).
  The 3-sigma upper limits for the finding chart (fc) and summed exposures are reported below:

  FILTER     T_start(s)  T_stop    Exposure     Mag/3UL
  ========================================================
  white (fc)   133        283        147        >19.96
  white        877       7754        540        >21.07
  v           6528       6727        196        >18.94
  b           2713       2758         44        >19.10
  u            345        595        245        >19.43
  u           7143       7343        196        >19.68
  uvw1        6938       7138        196        >19.61
  uvw2        7761       7961        196        >19.90
  =======================================================
  

  The above magnitudes are not corrected for the Galactic extinction corresponding to a reddening of E_{B-V} = 1.41 (Schlegel et al., 1998, ApJS, 500, 525). The photometry is on the UVOT photometric system described in Breeveld et al. 2011 (AIP Conf. Proc. 1358, 373)
• GCN Report 402.1
  GCN_Report 402.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_402_1.pdf by R.L.C. Starling at U. Leicester titled: "Swift Observations of GRB 121028A"