Gamma-ray Burst 120312A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 12 Mar 12 16:08:18 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.864d {+23d 51' 51"} (J2000)
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58090.74 SOD {16:08:10.74} UT,   3599.9 [sec] since BAT Trigger Time
  COUNTS:          6    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:     Mon 12 Mar 12 16:10:09 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     517566,   Seg_Num: 0
  GRB_RA:          251.764d {+16h 47m 03s} (J2000),
                   251.892d {+16h 47m 34s} (current),
                   251.240d {+16h 44m 58s} (1950)
  GRB_DEC:         +23.857d {+23d 51' 24"} (J2000),
                   +23.836d {+23d 50' 08"} (current),
                   +23.945d {+23d 56' 42"} (1950)
  GRB_DATE:        15998 TJD;    72 DOY;   12/03/12
  GRB_TIME:        57988.75 SOD {16:06:28.75} UT
  TRIGGER_INDEX:   262
  GRB_PHI:         164.02 [deg]
  GRB_THETA:        41.60 [deg]
  DELTA_TIME:      6.00 [sec]
  TRIGGER_DUR:      [sec],  copy from BAT_POS unavailable
  SOLN_STATUS:     0x0
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    0.00 [sigma]
  LC_URL:          sw00517566000msb.lc
  SUN_POSTN:       353.10d {+23h 32m 24s}   -2.98d {-02d 58' 48"}
  SUN_DIST:        101.45 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.11d {+15h 12m 27s}  -19.58d {-19d 34' 50"}
  MOON_DIST:        49.22 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.39, 37.21 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      245.77, 45.77 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        WARNING: No BAT_Position TDRSS message was received for this trigger_number!  
  COMMENTS:           
  COMMENTS:        This does not match any source in the ground catalog.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 12 Mar 12 16:11:19 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.864d {+23d 51' 50"} (J2000)
  POINT_ROLL:      88.128d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58093.86 SOD {16:08:13.86} UT,   3603.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.757
  N_STARS:         50
  X_OFFSET:        479 [pixels]
  Y_OFFSET:        586 [pixels]
  X_MAX:           1438 [pixels]
  Y_MAX:           1545 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    5
  SL_URL:          sw00517566000msufc90003.fits
  SUN_POSTN:       353.10d {+23h 32m 25s}   -2.98d {-02d 58' 47"}
  SUN_DIST:        101.45 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.13d {+15h 12m 30s}  -19.58d {-19d 34' 58"}
  MOON_DIST:        49.22 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.22 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 12 Mar 12 16:11:52 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.864d {+23d 51' 50"} (J2000)
  POINT_ROLL:      88.128d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58093.86 SOD {16:08:13.86} UT,   3603.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.757
  N_STARS:         50
  X_OFFSET:        479 [pixels]
  Y_OFFSET:        586 [pixels]
  X_MAX:           1438 [pixels]
  Y_MAX:           1545 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    5
  SL_URL:          sw00517566000msufc90003.fits
  SUN_POSTN:       353.10d {+23h 32m 25s}   -2.98d {-02d 58' 46"}
  SUN_DIST:        101.45 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.13d {+15h 12m 32s}  -19.58d {-19d 35' 01"}
  MOON_DIST:        49.22 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.22 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:12:48 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.864d {+23d 51' 50"} (J2000)
  ROLL:            88.128d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58093.86 SOD {16:08:13.86} UT,   3603.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     353261301
  X_OFFSET:        798 [pixels]
  Y_OFFSET:        905 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       958
  Y_GRB_POS:       1065
  BINNING_INDEX:   1
  IM_URL:          sw00517566000msuni90011.fits
  SUN_POSTN:       353.10d {+23h 32m 25s}   -2.98d {-02d 58' 45"}
  SUN_DIST:        101.45 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.14d {+15h 12m 34s}  -19.59d {-19d 35' 08"}
  MOON_DIST:        49.21 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.22 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:13:00 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.864d {+23d 51' 50"} (J2000)
  ROLL:            88.128d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58093.86 SOD {16:08:13.86} UT,   3603.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     353261301
  X_OFFSET:        798 [pixels]
  Y_OFFSET:        905 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       958
  Y_GRB_POS:       1065
  BINNING_INDEX:   1
  IM_URL:          sw00517566000msuni90011.fits
  SUN_POSTN:       353.10d {+23h 32m 25s}   -2.98d {-02d 58' 45"}
  SUN_DIST:        101.45 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.14d {+15h 12m 34s}  -19.59d {-19d 35' 09"}
  MOON_DIST:        49.21 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.22 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:18:42 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  POINT_ROLL:      88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58306.30 SOD {16:11:46.30} UT,   3815.5 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.505
  N_STARS:         101
  X_OFFSET:        239 [pixels]
  Y_OFFSET:        346 [pixels]
  X_MAX:           1678 [pixels]
  Y_MAX:           1785 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw00517566000msufc90215.fits
  SUN_POSTN:       353.11d {+23h 32m 26s}   -2.98d {-02d 58' 39"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.20d {+15h 12m 49s}  -19.60d {-19d 35' 47"}
  MOON_DIST:        49.19 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 12 Mar 12 16:19:04 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  POINT_ROLL:      88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58306.30 SOD {16:11:46.30} UT,   3815.5 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.505
  N_STARS:         101
  X_OFFSET:        239 [pixels]
  Y_OFFSET:        346 [pixels]
  X_MAX:           1678 [pixels]
  Y_MAX:           1785 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw00517566000msufc90215.fits
  SUN_POSTN:       353.11d {+23h 32m 26s}   -2.98d {-02d 58' 39"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.21d {+15h 12m 50s}  -19.60d {-19d 35' 49"}
  MOON_DIST:        49.19 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:19:48 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  ROLL:            88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58306.30 SOD {16:11:46.30} UT,   3815.5 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     353261514
  X_OFFSET:        798 [pixels]
  Y_OFFSET:        905 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       958
  Y_GRB_POS:       1065
  BINNING_INDEX:   1
  IM_URL:          sw00517566000msuni90223.fits
  SUN_POSTN:       353.11d {+23h 32m 26s}   -2.98d {-02d 58' 38"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.21d {+15h 12m 52s}  -19.60d {-19d 35' 54"}
  MOON_DIST:        49.19 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:20:08 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  ROLL:            88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58306.30 SOD {16:11:46.30} UT,   3815.5 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     353261514
  X_OFFSET:        798 [pixels]
  Y_OFFSET:        905 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       958
  Y_GRB_POS:       1065
  BINNING_INDEX:   1
  IM_URL:          sw00517566000msuni90223.fits
  SUN_POSTN:       353.11d {+23h 32m 26s}   -2.98d {-02d 58' 38"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.22d {+15h 12m 52s}  -19.60d {-19d 35' 56"}
  MOON_DIST:        49.19 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:23:57 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  POINT_ROLL:      88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58859.08 SOD {16:20:59.08} UT,   4368.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.852
  N_STARS:         167
  X_OFFSET:        239 [pixels]
  Y_OFFSET:        346 [pixels]
  X_MAX:           1678 [pixels]
  Y_MAX:           1785 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00517566000msufc90768.fits
  SUN_POSTN:       353.11d {+23h 32m 26s}   -2.98d {-02d 58' 34"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.26d {+15h 13m 02s}  -19.61d {-19d 36' 22"}
  MOON_DIST:        49.18 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 12 Mar 12 16:24:16 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  POINT_ROLL:      88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58859.08 SOD {16:20:59.08} UT,   4368.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.852
  N_STARS:         167
  X_OFFSET:        239 [pixels]
  Y_OFFSET:        346 [pixels]
  X_MAX:           1678 [pixels]
  Y_MAX:           1785 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00517566000msufc90768.fits
  SUN_POSTN:       353.11d {+23h 32m 27s}   -2.98d {-02d 58' 34"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.26d {+15h 13m 03s}  -19.61d {-19d 36' 24"}
  MOON_DIST:        49.17 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:25:17 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  ROLL:            88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58859.08 SOD {16:20:59.08} UT,   4368.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     353262067
  X_OFFSET:        798 [pixels]
  Y_OFFSET:        905 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       958
  Y_GRB_POS:       1065
  BINNING_INDEX:   1
  IM_URL:          sw00517566000msuni90776.fits
  SUN_POSTN:       353.11d {+23h 32m 27s}   -2.98d {-02d 58' 33"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.27d {+15h 13m 05s}  -19.61d {-19d 36' 31"}
  MOON_DIST:        49.17 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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:     Mon 12 Mar 12 16:25:32 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     517566,   Seg_Num: 0
  POINT_RA:        251.766d {+16h 47m 04s} (J2000)
  POINT_DEC:       +23.861d {+23d 51' 38"} (J2000)
  ROLL:            88.130d
  IMG_START_DATE:  15998 TJD;    72 DOY;   12/03/12
  IMG_START_TIME:  58859.08 SOD {16:20:59.08} UT,   4368.2 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     353262067
  X_OFFSET:        798 [pixels]
  Y_OFFSET:        905 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       958
  Y_GRB_POS:       1065
  BINNING_INDEX:   1
  IM_URL:          sw00517566000msuni90776.fits
  SUN_POSTN:       353.11d {+23h 32m 27s}   -2.98d {-02d 58' 33"}
  SUN_DIST:        101.46 [deg]   Sun_angle= 6.7 [hr] (West of Sun)
  MOON_POSTN:      228.27d {+15h 13m 06s}  -19.61d {-19d 36' 32"}
  MOON_DIST:        49.17 [deg]
  MOON_ILLUM:      76 [%]
  GAL_COORDS:       43.40, 37.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      245.78, 45.78 [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 #13049
  M. Stamatikos (OSU/NASA/GSFC), S. Campana (INAF-OAB), M. M. Chester (PSU), V. D'Elia (ASDC), N. Gehrels (NASA/GSFC), S. T. Holland (STScI), J. A. Kennea (PSU), V. Mangano (INAF-IASFPA), F. E. Marshall (NASA/GSFC), A. Maselli (INAF-IASFPA), A. Melandri (INAF-OAB), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (INAF-IASFPA), B. Sbarufatti (INAF-OAB/PSU), M. H. Siegel (PSU), M. C. Stroh (PSU), C. A. Swenson (PSU), G. Tagliaferri (INAF-OAB) and B.-B. Zhang (PSU) report on behalf of the Swift Team:
  At 16:06:28 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 120312A (trigger=517566). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 251.764, +23.857 which is

     RA(J2000) = 16h 47m 03s
     Dec(J2000) = +23d 51' 24"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peaked FRED structure with a duration of 12 about sec. The peak count rate was ~1300 counts/sec (15-350 keV), at ~0 sec after the trigger.
  Using promptly downlinked data we find an uncatalogued X-ray source with an enhanced position: RA, Dec 251.7885, 23.8586 which is equivalent to:

     RA(J2000)  = 16h 47m 09.23s
     Dec(J2000) = +23d 51' 30.8"
  

  with an uncertainty of 2.1 arcseconds (radius, 90% containment). 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 (4.08 x 10^20 cm^-2, Kalberla et al. 2005), with an excess column of 1.7 (+1.51/-1.34) x 10^21 cm^-2 (90% confidence).
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 112 s 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. The 8'x8' region for the list of sources generated on-board covers 100% of the XRT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.07.
  Burst Advocate for this burst is M. Stamatikos (Michael.Stamatikos-1 AT nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
• GCN Circular #13052
  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), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), 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+736 sec from the recent telemetry downlink, we report further analysis of BAT GRB 120312A (trigger #517566) (Stamatikos, et al., GCN Circ. 13049). The BAT ground-calculated position is RA, Dec = 251.812, 23.881 deg, which is

     RA(J2000)  =  16h 47m 14.8s 
     Dec(J2000) = +23d 52' 50.3" 
  

  with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 35%.
  The mask-weighted light curve shows a single slightly symmetric peak starting at ~T-10 sec, peaking at ~T+0.5 sec, and ending at ~T+35 sec. T90 (15-350 keV) is 14.2 +- 3.4 sec (estimated error including systematics).
  The time-averaged spectrum from T-1.42 to T+15.87 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.72 +- 0.23. The fluence in the 15-150 keV band is 5.7 +- 0.8 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.95 sec in the 15-150 keV band is 1.3 +- 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/517566/BA/
• GCN Circular #13053
  V. Mangano (INAF-IASFPA), A. Melandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU), M.C. Stroh (PSU), D.N. Burrows (PSU), A.P. Beardmore (U. Leicester), P.A. Evans (U. Leicester), O.M. Littlejohns (U. Leicester) and M. Stamatikos report on behalf of the Swift-XRT team:
  We have analysed 9.9 ks of XRT data for GRB 120312A (Stamatikos et al. GCN Circ. 13049), from 112 s to 19.6 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. Using 2188 s of PC mode data and 2 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 251.78816, +23.85817 which is equivalent to:

  RA (J2000): 16h 47m 09.16s
  Dec(J2000): +23d 51' 29.4"
  

  with an uncertainty of 1.6 arcsec (radius, 90% confidence).
  The light curve can be modelled with a power-law decay with a decay index of alpha=1.28 (+0.14, -0.13).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.54 (+0.26, -0.25). The best-fitting absorption column is 1.4 (+0.9, -0.8) x 10^21 cm^-2, in excess of the Galactic value of 4.1 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 4.9 x 10^-11 (5.7 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     1.4 (+0.9, -0.8) x 10^21 cm^-2
  Galactic foreground: 4.1 x 10^20 cm^-2
  Excess significance: 2.1 sigma
  Photon index:	     1.54 (+0.26, -0.25)
  

  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00517566.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #13054
  Paul Vreeswijk (U. Iceland), Dong Xu (WIS), John Telting, Gintaras Barisevicius (NOT), Daniele Malesani (DARK/NBI), P=E1ll Jakobsson (U. Iceland) report on behalf of a larger collaboration:
  Using ALFOSC on the Nordic Optical Telescope (NOT) we have obtained r'- (3 x 300 s) and z'-band (6 x 300 s) imaging of the field of the Swift GRB 120312A (Stamatikos et al., GCN 13049; Barthelmy et al., GCN 12052), starting on 2012 March 13.085 UT (9.93 hr after the GRB). The seeing during the observations was around 1".
  We do not detect any object within the enhanced Swift-XRT error circle (Mangano et al., GCN 13053) down to approximate limiting magnitudes of r'>23.5 and z'>22.2 (calibrated against the SDSS catalog).
• GCN Circular #13055
  N. R. Tanvir (U. Leicester), O. Hartoog (U. Amsterdam), and T. Schrabback (U. Bonn) report on behalf of a larger collaboration:
  We imaged the field of GRB120312A (Stamatikos et al. GCN13049) using the WHT/ACAM beginning 05:15 UT on March 13th (approximately 13 hours post-burst). A 24 minute integration was obtained in the z-band.
  Within the refined XRT error circle (Mangano et al. GCN13053) we find a source at position:

  RA(2000) = 16 47 09.23
  dec(2000)= +23 51 28.9
  

  The source may be slightly extended, although the S/N is too poor to determine this with confidence.=C2=A0 Its provisional magnitude is z~23.8 +/- 0.2 calibrated against nearby SDSS DR8 stars.
• GCN Circular #13056
  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, A.Kuznetsov, 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.Krushinski, I.Zalozhnich, A. Popov Ural Federal University
  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 GRB120312A 403 s after notice time and 512 s after GRB time at 2012-03-12 16:15:01 UT in two polarizations. On our first (180s exposure) set we haven`t found optical transient within SWIFT error-box. The 5-sigma upper limit has been about 17.6 mag The object has been observed in high zenit distance (~80 deg). The big time delay (in pointing) is caused by a non-standard format of the socket messages. The message may be cited.
• GCN Circular #13057
  S. R. Oates (MSSL-UCL) and M. Stamatikos (OSU/NASA/GSFC) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 120312A 105 s after the BAT trigger (Stamatikos et al., GCN Circ. 13049). No optical afterglow consistent with the XRT position (Mangano et al., GCN Circ 13053) or the WHT optical candidate position (Tanvir et al., GCN Circ 13055) 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           105          255          147         >21.3
  u_FC               318          567          246         >20.6
  white              105         7764          861         >21.9
  v                  647        18848         1378         >20.5
  b                  573         7559          568         >20.9
  u                  318        13854         1583         >21.3
  w1                 696        13039         1434         >21.0
  m2                 844        19630         1998         >21.4
  w2                 795        17934         1434         >21.4
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.071 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #13064
  N. R. Tanvir (U. Leicester), D. Perley (Caltech), K. Wiersema (U. Leicester), A. Cucchiara (UCSC/UCO Lick), K. Roth (Gemini) and J. Ehle (JACH) report on behalf of a larger collaboration:
  We observed the location of GRB 120312A with Gemini-N/GMOS in the z-band and UKIRT/WFCAM in the J- and K-bands. All observations were obtained approximately 23 hours post-burst.
  With GMOS we detect the source reported by Tanvir et al. (GCN 13055). Calibrating against SDSS field stars we find a magnitude z=24.35 +- 0.12, indicating a fading compared to the WHT epoch, and confirming this source as the afterglow of the GRB.
  From a provisional reduction of the UKIRT data, the afterglow is undetected to 3-sigma limits of J=21.1 and K=19.5 (calibrated against 2MASS), showing that it is not extremely red, as might have been expected if its faintness were due to a very dusty line of sight.
• GCN Circular #13065
  V. Rumyantsev, N. Pit' (CrAO), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
  We observed the field of GRB 120312A (Stamatikos et al., GCN 13049) with AZT-11 telescope of CrAO observatory starting on March 12 (UT) 23:21:13 under moderate weather conditions and seeing of about 2.4 arsces. Within enhanced Swift-XRT position (Mangano et al., GCN 13053) we do not detected any optical source, in particular afterglow candidate (Tanvir et al., GCN 13055). A photometry is based on the USNO-B1.0 star 1138-0244157 (16:47:09.53 +23:51:17.4) assuming R=17.3:

  T_start UT  T0+        Filter, Exposure, OT,  uplim (3 sigma)
                    (mid, d)            (s)
  
  23:21:13  0.3291       R     26x180    n/d     20.75 
  

• GCN Circular #13066
  V.V.Golovnya (Main Astro Obs, Kyiv) report:
  We have undertaken the review of the sky area in vicinity of=20 GRB 120312A (V. Mangano et al. GCN Circ.13053) on=20 astronegatives, collected in Ukrainian NAS Main astronomical=20 observatory plate archive (1976-1996). All the plates with=20 the possible object appearance are digitized using Microtek=20 ScanMaker 9800XL TMA and Epson Expression 10000XL flatbed=20 scanners and have been placed into Golosiiv Plate Archive=20 database DBGPA with open access to them.

   	The list of plates is given in the table:
  YYYYMMDD/TimeUT	--Plates--	Exp.	LimMag	Star USNOA2
  19810626/221142	GUA040C001973B	34.0	15.00	1125-07810808
  19810626/221142	GUA040D001974	34.0	15.00	1125-07810808
  19870424/003510	GUA040C001043A	18.0	16.10	1125-07808472
  19870424/010141	GUA040C001044	16.0	15.00	1125-07810808
  19890601/214206	GUA040C001474	18.0	16.65	1125-07808939
  19900621/205220	GUA040C001663A	16.5	15.00	1125-07810808
  19910615/211004	GUA040C001806A	22.5	16.10	1125-07808472
  Plates: =96the plates archive identifier of DWA (D/F=3D400/2000,
  GUA040C, M=3D103"/mm) of the Ukrainian NAS Main Astro obs.
  GUA040D (Marsden's number - 83) the plate number [1].
  Exp.   - Duration of the maximum exposure (minutes).=20
  LimM   - Limited V mag, derived in the 24 minutes area around=20
         the location given in V. Mangano et al. GCN Circ.13053:=20
         RA(J2000)=3D 16h 47m 09.16s, Dec(J2000)=3D +23d 51' 29.4"
  Star USNOA2 - Comparison star.
  

  The preview images of 7 areas together with =20 the 24x24 min.of arc area from SkyMap can be found in =20 http://gua.db.ukr-vo.org/img/grb/120312A/index.html The images with full resolution are available via e-mail on=20 demand.
  References:
  1.L.Pakuliak DATABASE of GOLOSIIV PLATE ARCHIVE (DBGPA V2.0), http://gua.db.ukr-vo.org