Gamma-ray Burst 131127A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:19:19 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     579571,   Seg_Num: 0
  GRB_RA:          332.751d {+22h 11m 00s} (J2000),
                   332.903d {+22h 11m 37s} (current),
                   332.205d {+22h 08m 49s} (1950)
  GRB_DEC:         +36.590d {+36d 35' 24"} (J2000),
                   +36.659d {+36d 39' 32"} (current),
                   +36.343d {+36d 20' 35"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       7068 [cnts]    Image_Peak=225 [image_cnts]
  TRIGGER_DUR:     2.048 [sec] 
  TRIGGER_INDEX:   264     E_range: 25-100 keV
  BKG_INTEN:       70504 [cnts]
  BKG_TIME:        36660.67 SOD {10:11:00.67} UT
  BKG_DUR:         24 [sec]
  GRB_DATE:        16623 TJD;   331 DOY;   13/11/27
  GRB_TIME:        36695.55 SOD {10:11:35.55} UT
  GRB_PHI:         -65.54 [deg]
  GRB_THETA:        33.61 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.26 [sigma]
  IMAGE_SIGNIF:    9.02 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +1  +2  -1  +0  +0 +20  +0 
  SUN_POSTN:       243.41d {+16h 13m 38s}  -21.19d {-21d 11' 18"}
  SUN_DIST:        102.07 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.81d {+11h 31m 15s}   -0.81d {-00d 48' 31"}
  MOON_DIST:       139.70 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.39,-15.95 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      352.01, 43.88 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
  COMMENTS:        probably due to it occurring during a Malindi downlink session.  
  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 = 77.13,18.09 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:20:03 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     579571,   Seg_Num: 0
  GRB_RA:          332.7325d {+22h 10m 55.80s} (J2000),
                   332.8844d {+22h 11m 32.24s} (current),
                   332.1872d {+22h 08m 44.92s} (1950)
  GRB_DEC:         +36.6102d {+36d 36' 36.7"} (J2000),
                   +36.6791d {+36d 40' 44.6"} (current),
                   +36.3633d {+36d 21' 48.0"} (1950)
  GRB_ERROR:       5.4 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.33e-09 [erg/cm2/sec]
  GRB_SIGNIF:      8.00 [sigma]
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  36789.37 SOD {10:13:09.37} UT,   93.8 [sec] since BAT Trigger Time
  TAM[0-3]:        327.68 237.22 261.70 243.47
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       243.41d {+16h 13m 38s}  -21.19d {-21d 11' 19"}
  SUN_DIST:        102.07 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.82d {+11h 31m 16s}   -0.81d {-00d 48' 39"}
  MOON_DIST:       139.67 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.39,-15.92 [deg] galactic lon,lat of the burst
  ECL_COORDS:      352.01, 43.90 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        The XRT position is 1.49 arcmin from the BAT position.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:20:06 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  GRB_RA:          332.7325d {+22h 10m 55.8s} (J2000),
                   332.8844d {+22h 11m 32.2s} (current),
                   332.1872d {+22h 08m 44.9s} (1950)
  GRB_DEC:         +36.6102d {+36d 36' 36.7"} (J2000),
                   +36.6791d {+36d 40' 44.6"} (current),
                   +36.3633d {+36d 21' 48.0"} (1950)
  GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       64 [cnts]
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  36789.37 SOD {10:13:09.37} UT,   93.8 [sec] since BAT Trigger Time
  CENTROID_X:      263.15,  raw= 263  [pixels]
  CENTROID_Y:      260.29,  raw= 260  [pixels]
  ROLL:            252.36 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -88.88
  GRB_POS_XRT_Z:   -95.58
  IMAGE_URL:       sw00579571000msxps_rw.img
  SUN_POSTN:       243.41d {+16h 13m 38s}  -21.19d {-21d 11' 19"}
  SUN_DIST:        102.07 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.82d {+11h 31m 16s}   -0.81d {-00d 48' 39"}
  MOON_DIST:       139.67 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.39,-15.92 [deg] galactic lon,lat of the burst
  ECL_COORDS:      352.01, 43.90 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:20:21 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  GRB_RA:          332.7325d {+22h 10m 55.8s} (J2000),
                   332.8844d {+22h 11m 32.2s} (current),
                   332.1872d {+22h 08m 44.9s} (1950)
  GRB_DEC:         +36.6102d {+36d 36' 36.7"} (J2000),
                   +36.6791d {+36d 40' 44.6"} (current),
                   +36.3633d {+36d 21' 48.0"} (1950)
  GRB_ERROR:       5.0 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       64 [cnts]
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  36789.37 SOD {10:13:09.37} UT,   93.8 [sec] since BAT Trigger Time
  CENTROID_X:      263.15,  raw= 263  [pixels]
  CENTROID_Y:      260.29,  raw= 260  [pixels]
  ROLL:            252.36 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -88.88
  GRB_POS_XRT_Z:   -95.58
  IMAGE_URL:       sw00579571000msxps_rw.img
  SUN_POSTN:       243.41d {+16h 13m 38s}  -21.19d {-21d 11' 19"}
  SUN_DIST:        102.07 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.82d {+11h 31m 17s}   -0.81d {-00d 48' 42"}
  MOON_DIST:       139.67 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.39,-15.92 [deg] galactic lon,lat of the burst
  ECL_COORDS:      352.01, 43.90 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:20:46 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     579571,   Seg_Num: 0
  GRB_RA:          332.751d {+22h 11m 00s} (J2000),
                   332.903d {+22h 11m 37s} (current),
                   332.205d {+22h 08m 49s} (1950)
  GRB_DEC:         +36.590d {+36d 35' 24"} (J2000),
                   +36.659d {+36d 39' 32"} (current),
                   +36.343d {+36d 20' 35"} (1950)
  GRB_DATE:        16623 TJD;   331 DOY;   13/11/27
  GRB_TIME:        36695.55 SOD {10:11:35.55} UT
  TRIGGER_INDEX:   264
  GRB_PHI:         -65.54 [deg]
  GRB_THETA:        33.61 [deg]
  DELTA_TIME:      32.00 [sec]
  TRIGGER_DUR:     2.048 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.26 [sigma]
  IMAGE_SIGNIF:    9.02 [sigma]
  LC_URL:          sw00579571000msb.lc
  SUN_POSTN:       243.41d {+16h 13m 38s}  -21.19d {-21d 11' 19"}
  SUN_DIST:        102.07 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.82d {+11h 31m 18s}   -0.81d {-00d 48' 46"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.39,-15.95 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      352.01, 43.88 [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 = 77.13,18.09 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:23:50 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.772d {+22h 11m 05s} (J2000)
  POINT_DEC:       +36.594d {+36d 35' 40"} (J2000)
  ROLL:            252.357d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  36797.60 SOD {10:13:17.60} UT,   102.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     407240008
  X_OFFSET:        1065 [pixels]
  Y_OFFSET:        934 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1225
  Y_GRB_POS:       1094
  BINNING_INDEX:   1
  IM_URL:          sw00579571000msuni0114.fits
  SUN_POSTN:       243.41d {+16h 13m 39s}  -21.19d {-21d 11' 20"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.85d {+11h 31m 24s}   -0.82d {-00d 49' 18"}
  MOON_DIST:       139.70 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.40,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.03, 43.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:24:16 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.772d {+22h 11m 05s} (J2000)
  POINT_DEC:       +36.594d {+36d 35' 40"} (J2000)
  ROLL:            252.357d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  36797.60 SOD {10:13:17.60} UT,   102.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     407240008
  X_OFFSET:        1065 [pixels]
  Y_OFFSET:        934 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1225
  Y_GRB_POS:       1094
  BINNING_INDEX:   1
  IM_URL:          sw00579571000msuni0114.fits
  SUN_POSTN:       243.41d {+16h 13m 39s}  -21.19d {-21d 11' 21"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.85d {+11h 31m 25s}   -0.82d {-00d 49' 23"}
  MOON_DIST:       139.70 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.40,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.03, 43.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:28:42 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  POINT_ROLL:      252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37010.77 SOD {10:16:50.77} UT,   315.2 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.598
  N_STARS:         104
  X_OFFSET:        745 [pixels]
  Y_OFFSET:        614 [pixels]
  X_MAX:           1704 [pixels]
  Y_MAX:           1573 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw00579571000msufc0315.fits
  SUN_POSTN:       243.42d {+16h 13m 40s}  -21.19d {-21d 11' 23"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.89d {+11h 31m 33s}   -0.84d {-00d 50' 10"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:29:20 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  ROLL:            252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37010.77 SOD {10:16:50.77} UT,   315.2 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     407240222
  X_OFFSET:        1065 [pixels]
  Y_OFFSET:        934 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1225
  Y_GRB_POS:       1094
  BINNING_INDEX:   1
  IM_URL:          sw00579571000msuni0327.fits
  SUN_POSTN:       243.42d {+16h 13m 40s}  -21.19d {-21d 11' 23"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.89d {+11h 31m 35s}   -0.84d {-00d 50' 16"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:29:07 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  POINT_ROLL:      252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37010.77 SOD {10:16:50.77} UT,   315.2 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.598
  N_STARS:         104
  X_OFFSET:        745 [pixels]
  Y_OFFSET:        614 [pixels]
  X_MAX:           1704 [pixels]
  Y_MAX:           1573 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw00579571000msufc0315.fits
  SUN_POSTN:       243.42d {+16h 13m 40s}  -21.19d {-21d 11' 23"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.89d {+11h 31m 34s}   -0.84d {-00d 50' 14"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [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 27 Nov 13 10:29:33 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  ROLL:            252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37010.77 SOD {10:16:50.77} UT,   315.2 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     407240222
  X_OFFSET:        1065 [pixels]
  Y_OFFSET:        934 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1225
  Y_GRB_POS:       1094
  BINNING_INDEX:   1
  IM_URL:          sw00579571000msuni0327.fits
  SUN_POSTN:       243.42d {+16h 13m 40s}  -21.19d {-21d 11' 23"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.90d {+11h 31m 35s}   -0.84d {-00d 50' 19"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:29:24 UT
  NOTICE_TYPE:     Swift-XRT Position UPDATE
  TRIGGER_NUM:     579571,   Seg_Num: 0
  GRB_RA:          332.7293d {+22h 10m 55.03s} (J2000),
                   332.8811d {+22h 11m 31.47s} (current),
                   332.1840d {+22h 08m 44.15s} (1950)
  GRB_DEC:         +36.6097d {+36d 36' 34.9"} (J2000),
                   +36.6786d {+36d 40' 42.8"} (current),
                   +36.3628d {+36d 21' 46.2"} (1950)
  GRB_ERROR:       2.1 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  36866.00 SOD {10:14:26.00} UT,   170.4 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       243.42d {+16h 13m 40s}  -21.19d {-21d 11' 23"}
  SUN_DIST:        102.06 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.90d {+11h 31m 35s}   -0.84d {-00d 50' 17"}
  MOON_DIST:       139.66 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.38,-15.92 [deg] galactic lon,lat of the burst
  ECL_COORDS:      352.00, 43.90 [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 0.11% < P(seren) < 0.58%.  
  

• GCN Circular #15516
  C. B. Markwardt (NASA/GSFC), S. D. Barthelmy (GSFC), S. B. Cenko (GSFC), V. D'Elia (ASDC), D. Malesani (DARK/NBI), F. E. Marshall (NASA/GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL) and P. Romano (INAF-IASFPA) report on behalf of the Swift Team:
  At 10:11:35 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 131127A (trigger=579571). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 332.751, +36.590 which is

     RA(J2000)  =  22h 11m 00s
     Dec(J2000) = +36d 35' 24"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows several overlapping peaks with a duration of about 50 sec. The peak count rate was ~1600 counts/sec (15-350 keV), at 0 sec after the trigger.
  The XRT began observing the field at 10:13:09.3 UT, 93.8 seconds after the BAT trigger. Using promptly downlinked data we find a bright, fading, uncatalogued X-ray source with an enhanced position: RA, Dec 332.7293, 36.6098 which is equivalent to:

     RA(J2000)  = 22h 10m 55.03s
     Dec(J2000) = +36d 36' 35.2"
  

  with an uncertainty of 2.1 arcseconds (radius, 90% containment). This location is 94 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper.
  A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.15 x 10^21 cm^-2 (Kalberla et al. 2005).
  The initial flux in the 2.5 s image was 1.33e-09 erg cm^-2 s^-1 (0.2-10 keV).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 102 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 19.6 mag. Data from the list of sources generated on-board are not available at this time. No correction has been made for the expected extinction corresponding to E(B-V) of 0.14.
  Burst Advocate for this burst is C. B. Markwardt (Craig.Markwardt 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 NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:35:04 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  POINT_ROLL:      252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37564.87 SOD {10:26:04.87} UT,   869.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.053
  N_STARS:         190
  X_OFFSET:        505 [pixels]
  Y_OFFSET:        374 [pixels]
  X_MAX:           1944 [pixels]
  Y_MAX:           1813 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00579571000msufc0869.fits
  SUN_POSTN:       243.42d {+16h 13m 41s}  -21.19d {-21d 11' 26"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.94d {+11h 31m 46s}   -0.85d {-00d 51' 17"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 27 Nov 13 10:35:21 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  POINT_ROLL:      252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37564.87 SOD {10:26:04.87} UT,   869.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.053
  N_STARS:         190
  X_OFFSET:        505 [pixels]
  Y_OFFSET:        374 [pixels]
  X_MAX:           1944 [pixels]
  Y_MAX:           1813 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00579571000msufc0869.fits
  SUN_POSTN:       243.42d {+16h 13m 41s}  -21.19d {-21d 11' 26"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.94d {+11h 31m 47s}   -0.86d {-00d 51' 20"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [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 27 Nov 13 10:36:40 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  ROLL:            252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37564.87 SOD {10:26:04.87} UT,   869.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     407240776
  X_OFFSET:        1064 [pixels]
  Y_OFFSET:        933 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1224
  Y_GRB_POS:       1093
  BINNING_INDEX:   1
  IM_URL:          sw00579571000msuni0881.fits
  SUN_POSTN:       243.42d {+16h 13m 41s}  -21.19d {-21d 11' 26"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.96d {+11h 31m 49s}   -0.86d {-00d 51' 34"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [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 27 Nov 13 10:36:52 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     579571,   Seg_Num: 0
  POINT_RA:        332.776d {+22h 11m 06s} (J2000)
  POINT_DEC:       +36.595d {+36d 35' 42"} (J2000)
  ROLL:            252.360d
  IMG_START_DATE:  16623 TJD;   331 DOY;   13/11/27
  IMG_START_TIME:  37564.87 SOD {10:26:04.87} UT,   869.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     407240776
  X_OFFSET:        1064 [pixels]
  Y_OFFSET:        933 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1224
  Y_GRB_POS:       1093
  BINNING_INDEX:   1
  IM_URL:          sw00579571000msuni0881.fits
  SUN_POSTN:       243.42d {+16h 13m 41s}  -21.19d {-21d 11' 26"}
  SUN_DIST:        102.09 [deg]   Sun_angle= -6.0 [hr] (East of Sun)
  MOON_POSTN:      172.96d {+11h 31m 50s}   -0.86d {-00d 51' 36"}
  MOON_DIST:       139.69 [deg]
  MOON_ILLUM:      34 [%]
  GAL_COORDS:       90.41,-15.95 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      352.04, 43.87 [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 #15517
  K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University
  E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, A.Sankovich Sternberg Astronomical Institute, Moscow State University
  V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk
  A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory
  V.Krushinsky, I.Zalozhnih, A. Popov Ural Federal University, Yekaterinburg, Kourovka
  Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
  Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA)
  MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Tunka was pointed to the GRB131127A 503 sec after GRB time and 40 sec after notice time at 2013-11-27 10:19:58 UT in two polarizations. On our first (100s exposure) set we haven`t found optical transient within SWIFT error-box (ra=22 11 00 dec=+36 35 24 r=0.050000). The 5-sigma upper limit has been about 17.5 mag The message may be cited.
• GCN Circular #15518
  D. Xu (DARK/NBI), J.-Z. Liu, G.-J. Feng, H.-B. Niu, C.-H. Bai, A. Esamdin, L. Ma (XAO) report:
  We observed the field of GRB 131127A (Markwardt et al., GCN 15516) using 1m telescope located on Mt. Nanshan, Xinjiang, China. Observations started at 11:45:12 UT on 2013-11-27 (i.e., 1.56 hr after the BAT trigger) and a series of R-band frames were obtained.
  Within the SPER XRT error circle (http://www.swift.ac.uk/sper/) of this burst, no crediable optical source is detected down to a limiting magnitude of R=20.5 mag, calibrated with nearby USNO B1 field.
• GCN Circular #15519
  E. Klunko (ISTP), A.Volnova (IKI), M. Eselevich (ISTP), A. Pozanenko(IKI) report on behalf of larger GRB follow-up collaboration:
  We observed the field of the Swift GRB 131127A (Markwardt et al., GCN 15516) with AZT-33IK telescope of Sayan observatory (Mondy) starting Nov., 27 (UT) 10:40:06. We obtained several images in R-filter with exposure of 30 and 60 seconds. Within the XRT circle (Markwardt et al., GCN 15516) we did not detect any optical object.
  The details of the photometry are the following:

  UT start,      t-T0           Filter    Exp.             OT     UL
                   (mid, days)              (s)                        (3 sigma)
  10:40:06     0.02839       R        7*30+21*60    n/d    21.3
  

  The photometry is based on 3 USNO-B1.0 stars:

  USNO-B id     RA              Dec             R2
  1265-0518495 22:11:06.80 +36:35:45.6 16.06
  1265-0518432 22:10:59.37 +36:35:56.7 16.45
  1266-0522367 22:10:48.55 +36:36:43.7 15.45
  

• GCN Circular #15520
  P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
  Using 3638 s of XRT Photon Counting mode data and 7 UVOT images for GRB 131127A, 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 = 332.73008, +36.60929 which is equivalent to:

  RA (J2000): 22h 10m 55.22s
  Dec (J2000): +36d 36' 33.5"
  

  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 #15521
  C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team):
  Using the data set from T-240 to T+960 sec from the recent telemetry downlink, we report further analysis of BAT GRB 131127A (trigger #579571) (Markwardt, et al., GCN Circ. 15516). The BAT ground-calculated position is RA, Dec = 332.714, 36.596 deg which is

      RA(J2000)  =  22h 10m 51.3s
      Dec(J2000) = +36d 35' 46.9"
  

  with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 39%.
  The mask-weighted light curve has multiple peaks. The first set of about 3 peaks occurs before the initial trigger between T-60 and T-38 sec. The main set of about 7-8 peaks occurs between T-5 and T+40 sec. The peak emission occurs at about T+0 sec. T90 (15-350 keV) is 92.1 +- 10.2 sec (estimated error including systematics).
  The time-averaged spectrum from T-59.4 to T+37.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.34 +- 0.16. The fluence in the 15-150 keV band is 1.9 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T-0.54 sec in the 15-150 keV band is 1.3 +- 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/579571/BA/
• GCN Circular #15522
  A. Sota, J. Gorosabel and A. J. Castro-Tirado (IAA-CSIC Granada) on behalf of a larger collaboration, report:
  "Following the detection of GRB 131127A by Swift (Markwardt et al. GCNC 15516), we have conducted I-band observations with the 1.5m OSN telescope at Observatorio de Sierra Nevada (Granada, Spain), starting on 27 Nov 18:26 UT,(i.e. 8.2-hr post burst). A stack of 17 x 300s images shows nothing at the enhanced Swift/XRT position (Evans et al. GCNC 15520) down to I = 21".
• GCN Circular #15523
  A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), B.P. Gompertz (U. Leicester), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), J.A. Kennea (PSU) and C.B. Markwardt report on behalf of the Swift-XRT team:
  We have analysed 6.5 ks of XRT data for GRB 131127A (Markwardt et al. GCN Circ. 15516), from 84 s to 24.3 ks after the BAT trigger. The data comprise 62 s in Windowed Timing (WT) mode (the first 8 s were taken while Swift was slewing) with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN. Circ 15520).
  The late-time light curve (from T0+4.5 ks) can be modelled with a power-law decay with a decay index of alpha=1.55 (+0.26, -0.22).
  A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 3.8 (+0.4, -0.3). The best-fitting absorption column is 3.9 (+0.7, -0.6) x 10^21 cm^-2, in excess of the Galactic value of 1.2 x 10^21 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.22 (+/-0.15) and a best-fitting absorption column of 2.5 (+0.5, -0.4) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (6.1 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     2.5 (+0.5, -0.4) x 10^21 cm^-2
  Galactic foreground: 1.2 x 10^21 cm^-2
  Excess significance: 5.1 sigma
  Photon index:	     2.22 (+/-0.15)
  

  If the light curve continues to decay with a power-law decay index of 1.55, the count rate at T+24 hours will be 2.3 x 10^-3 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.0 x 10^-14 (1.4 x 10^-13) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00579571.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #15525
  FROM: Nat Butler at Az State U
  Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), Willia= m H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB)= , J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), J= es=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC),= and Harvey Moseley (GSFC) report:
  We observed the field of GRB 131127A (Markwardt, et al., GCN 15516) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.org) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacio= nal on Sierra San Pedro M=E1rtir from 2013/11 28.11 to 2013/11 28.26 UTC (16.= 42 to 19.94 hours after the BAT trigger), obtaining a total of 2.49 hours exposure in the r and i bands and 1.04 hours exposure in the Z, Y, J, and= H bands.
  We do not detect any sources within the Enhanced Swift-XRT error circle (Evans et al., GCN 15520), in comparison with 2MASS, we obtain the following upper limits (3-sigma):

    r > 24.19
    i > 23.53
    Z > 22.78
    Y > 22.16
    J > 22.04
    H > 21.48
  

  However, we do detect a red source just outside (3.3" away from the cente= r) of the XRT position, at a position RA, DEC =3D 332.731227 , 36.609171 (J2= 000, +/- 0.5"). We measure:

    r = 24.21 +/- 0.35
    i = 22.48 +/- 0.11
    Z = 21.85 +/- 0.16
    Y = 21.22 +/- 0.15
    J = 21.03 +/- 0.14
    H = 20.88 +/- 0.20
  

  The faint flux in r band relative to the redder bands could be due to IGM attenuation at high redshift, z ~ 5. We cannot confirm fading of this source. Further observations of this source are encouraged.
  The magnitudes above are in the AB system and are not corrected for Galactic extinction, E[B-V]~0.1, in the direction of the GRB.
  We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedr= o M=E1rtir.
• GCN Circular #15526
  D. Kawamura, T. Sakamoto, I. Takahashi, S. Sugai, A. Yoshida (AGU)
  We observed the field of GRB 131127A detected by Swift (trigger #579571; Markwardt et al., GCN Circ. 15516) with the 12-inch AGU Robotic Optical Monitor for Astrophysical object - Narrow (AROMA-N) located at the Sagamihara campus of Aoyama Gakuin University.
  60 images of 60 sec exposures were taken in the R filter starting from November 11 10:42:18 (UT) about 30 minutes after the trigger and stopped on November 11 11:48:15 (UT). We do not detect the optical afterglow both in the individual images and the stacked image, which combined 57 good quality images, inside the enhanced XRT position (Evans, et al., GCN #15520). The estimated five sigma upper limit of the combined image (total exposure of 3420 sec) is ~16.6 mag using the USNO-B1 catalog.
• GCN Circular #15527
  A. A. Breeveld (UCL-MSSL) and C. B. Markwardt (NASA/GSFC) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 131127A 102 s after the BAT trigger (Markwardt et al., GCN Circ. 15516). No optical afterglow consistent with the XRT position (Evans et al. GCN Circ. 15520) nor the RATIR position (Butler et al. GCN Circ. 15525) 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           102          252          147         >21.4
  u_FC               315          565          246         >20.6
  white              102         6711          746         >22.3
  v                  645         7024          373         >20.3
  b                  571         6506          452         >21.2
  u                  315         6300          678         >21.1
  w1                 694         6095          432         >20.6
  m2                 669         5890          269         >20.1
  w2                 621         6916          471         >20.9
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.14 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #15532
  U.Quadri, L.Strabla and R.Girelli report:
  We imaged the field of GRB 131127A detected by SWIFT(trigger 00579571) with the robotic telescope of (IAU station 565) Bassano Bresciano Observatory, Italy (www.osservatoriobassano.org).
  The observations started 9h 2m. after the GRB trigger,with our schmidt telescope D=320/400 mm F/D=3.1.
  Weather conditions were good.
  We co-added a series of 5 exposures of 120 sec each.
  We did not found any optical counterpart in the error box of the XRTcandidate (Markwardt et al., GCN 15516).

  Start      End       R.lim
  542min     554min    18.5
  

  Magnitudes were estimated with the USNO-B1 cat. and are not corrected for galactic dust extinction.
  The message may be cited.
• GCN Circular #15548
  Myungshin Im, Changsu Choi (CEOU/SNU), Hyein Lee, Huynh Ahn N. Le, and Soojong Pak (Kyunghee Univ.)
  We observed the field of GRB 131127A (Markwardt et al. GCN 15516), using CQEUAN (Park et al. 2012) on the 2.1-m Otto-Struve telescope at the McDonald Observatory in Texas, US. The observation started at 2013-11-29 01:31:43 UT, or about 1.63 days after the BAT alert. A series of images were taken in r, i, and z-band for about 45 min.
  We identify the red source reported in Butler et al. (GCN 15525), but no significant fading of the source was found with z = 21.90 +- 0.15 AB mag, consistent with Z = 21.85 +- 0.16 mag from Butler et al. (GCN 15525). This suggests that the red source may not be the GRB afterglow, or the light curve is changing very slowly.
• GCN Circular #15555
  SUBJECT: GRB 131127A: RATIR Rejection of High-z Candidate
  Nat Butler (ASU), Alan M. Watson (UNAM), Alexander Kutyrev (GSFC), Willia= m H. Lee (UNAM), Michael G. Richer (UNAM), Chris Klein (UCB), Ori Fox (UCB)= , J. Xavier Prochaska (UCSC), Josh Bloom (UCB), Antonino Cucchiara (ORAU/GSFC), Eleonora Troja (GSFC), Owen Littlejohns (ASU), Enrico Ramirez-Ruiz (UCSC), Jos=E9 A. de Diego (UNAM), Leonid Georgiev (UNAM), J= es=FAs Gonz=E1lez (UNAM), Carlos Rom=E1n-Z=FA=F1iga (UNAM), Neil Gehrels (GSFC),= and Harvey Moseley (GSFC) report:
  We again observed the field of GRB 131127A (Markwardt, et al., GCN 15516) with the Reionization and Transients Infrared Camera (RATIR; www.ratir.or= g) on the 1.5m Harold Johnson Telescope at the Observatorio Astron=F3mico Nacional on Sierra San Pedro M=E1rtir from 2013/11 29.09 to 2013/11 29.17= UTC (40.06 to 41.98 hours after the BAT trigger), obtaining a total of 1.42 hours exposure in the r and i bands and 0.60 hours exposure in the Z, Y, = J, and H bands.
  For the red source 3.3" away from the center of the XRT positions (Butler et al., GCN 15525), in comparison with 2MASS, we obtain:

  r > 23.78
  i = 22.68 +/- 0.16 (0.20 +/- 0.19)
  Z = 22.02 +/- 0.26 (0.17 +/- 0.31)
  Y = 21.31 +/- 0.24 (0.09 +/- 0.28)
  J = 21.26 +/- 0.29 (0.23 +/- 0.32)
  H = 20.55 +/- 0.24 (-0.33 +/- 0.31)
  

  The change in magnitude relative to the observations on the previous nigh= t are given in the parentheses. There is slight (~<1-sigma) evidence for a fade in most bands, but the shallowness ~t^(-0.2) of the fade is not expected for a GRB afterglow. We conclude, as did Im et al. (GCN 15548), that this source is not the afterglow of GRB 131127A.
  We thank the staff of the Observatorio Astron=F3mico Nacional in San Pedro M=E1rtir.
• GCN Circular #15570
  A.Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), A. Pozanenko(IKI) report on behalf of larger GRB follow-up collaboration:
  We report about revised photometry of the GRB 131127A (Markwardt et al., GCN 15516) published earlier (Klunko et al., GCN 15519). Using combined image of full data set of the observations on Nov. 27 we do not detect any optical counterpart in the enhanced XRT error circle (Evans et al., GCN 15520). The details of the photometry are the following:

  UT start       t-T0           Filter    Exp.   OT   UL
                   (mid, days)             (s)             (3 sigma)
  10:40:06     0.04680      R         4650   n/d   22.5
  

  The photometry is based on the same 3 USNO-B1.0 stars listed in the GCN 15519.
  The deep upper limit obtained at ~67 min (mid time) after burst trigger together with Swift/XRT observations (www.swift.ac.uk/xrt_curves/00579571/flux.qdp) suggests the upper limit of optical-to-X-ray spectral slope beta_OX = -0.02 and classify the GRB 131127A as a dark burst according to Jakobsson (Jakobsson et al., 2004, ApJ, 614, L21).