Gamma-ray Burst 070802

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:16:52 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     286809,   Seg_Num: 0
  GRB_RA:           36.851d {+02h 27m 24s} (J2000),
                    36.911d {+02h 27m 39s} (current),
                    36.454d {+02h 25m 49s} (1950)
  GRB_DEC:         -55.536d {-55d 32' 10"} (J2000),
                   -55.503d {-55d 30' 08"} (current),
                   -55.760d {-55d 45' 34"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       0 [cnts]    Image_Peak=1465 [image_cnts]
  TRIGGER_DUR:     64.000 [sec] 
  TRIGGER_INDEX:   20000     E_range: 15-50 keV
  BKG_INTEN:       0 [cnts]
  BKG_TIME:        0.00 SOD {00:00:00.00} UT
  BKG_DUR:         0 [sec]
  GRB_DATE:        14314 TJD;   214 DOY;   07/08/02
  GRB_TIME:        25645.87 SOD {07:07:25.87} UT
  GRB_PHI:          28.54 [deg]
  GRB_THETA:        25.46 [deg]
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    7.15 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +6  +1  -3  +0  +0 +30  +1 
  SUN_POSTN:       132.08d {+08h 48m 20s}  +17.84d {+17d 50' 08"}
  SUN_DIST:        107.52 [deg]   Sun_angle= 6.3 [hr] (West of Sun)
  MOON_POSTN:      352.19d {+23h 28m 45s}   -2.02d {-02d 00' 59"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.14,-56.73 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      357.90,-63.06 [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 an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 14.21,-9.27 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:17:08 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.828d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.546d {-55d 32' 46"} (J2000)
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25783.79 SOD {07:09:43.79} UT,   137.9 [sec] since BAT Trigger Time
  COUNTS:          7    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        3    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:     Thu 02 Aug 07 07:18:19 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     286809,   Seg_Num: 0
  GRB_RA:           36.851d {+02h 27m 24s} (J2000),
                    36.911d {+02h 27m 39s} (current),
                    36.454d {+02h 25m 49s} (1950)
  GRB_DEC:         -55.536d {-55d 32' 10"} (J2000),
                   -55.503d {-55d 30' 08"} (current),
                   -55.760d {-55d 45' 34"} (1950)
  GRB_DATE:        14314 TJD;   214 DOY;   07/08/02
  GRB_TIME:        25645.87 SOD {07:07:25.87} UT
  TRIGGER_INDEX:   20000
  GRB_PHI:          28.54 [deg]
  GRB_THETA:        25.46 [deg]
  DELTA_TIME:      0.00 [sec]
  TRIGGER_DUR:     64.000 [sec] 
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    7.15 [sigma]
  LC_URL:          sw00286809000msb.lc
  SUN_POSTN:       132.09d {+08h 48m 21s}  +17.84d {+17d 50' 07"}
  SUN_DIST:        107.52 [deg]   Sun_angle= 6.3 [hr] (West of Sun)
  MOON_POSTN:      352.20d {+23h 28m 48s}   -2.01d {-02d 00' 34"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.14,-56.73 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      357.90,-63.06 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is an image trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 14.21,-9.27 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:18:39 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.547d {-55d 32' 46"} (J2000)
  POINT_ROLL:      83.885d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25786.72 SOD {07:09:46.72} UT,   140.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.207
  N_STARS:         22
  X_OFFSET:        537 [pixels]
  Y_OFFSET:        470 [pixels]
  X_MAX:           1496 [pixels]
  Y_MAX:           1429 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00286809000msufc0140.fits
  SUN_POSTN:       132.09d {+08h 48m 21s}  +17.84d {+17d 50' 07"}
  SUN_DIST:        107.53 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.20d {+23h 28m 48s}   -2.01d {-02d 00' 28"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:19:16 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.547d {-55d 32' 46"} (J2000)
  POINT_ROLL:      83.885d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25786.72 SOD {07:09:46.72} UT,   140.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.207
  N_STARS:         22
  X_OFFSET:        537 [pixels]
  Y_OFFSET:        470 [pixels]
  X_MAX:           1496 [pixels]
  Y_MAX:           1429 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00286809000msufc0140.fits
  SUN_POSTN:       132.09d {+08h 48m 21s}  +17.84d {+17d 50' 06"}
  SUN_DIST:        107.53 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.21d {+23h 28m 50s}   -2.01d {-02d 00' 18"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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:     Thu 02 Aug 07 07:19:59 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.547d {-55d 32' 46"} (J2000)
  ROLL:            83.885d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25786.72 SOD {07:09:46.72} UT,   140.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     207731388
  X_OFFSET:        856 [pixels]
  Y_OFFSET:        789 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1016
  Y_GRB_POS:       949
  BINNING_INDEX:   1
  IM_URL:          sw00286809000msuni0140.fits
  SUN_POSTN:       132.09d {+08h 48m 21s}  +17.83d {+17d 50' 06"}
  SUN_DIST:        107.53 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.21d {+23h 28m 51s}   -2.00d {-02d 00' 06"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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:     Thu 02 Aug 07 07:20:25 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.547d {-55d 32' 46"} (J2000)
  ROLL:            83.885d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25786.72 SOD {07:09:46.72} UT,   140.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     207731388
  X_OFFSET:        856 [pixels]
  Y_OFFSET:        789 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1016
  Y_GRB_POS:       949
  BINNING_INDEX:   1
  IM_URL:          sw00286809000msuni0140.fits
  SUN_POSTN:       132.09d {+08h 48m 21s}  +17.83d {+17d 50' 06"}
  SUN_DIST:        107.53 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.22d {+23h 28m 52s}   -2.00d {-01d 59' 59"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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_sources_image.fits.gz file does not exist; skipping the attachment.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:24:30 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 38"} (J2000)
  POINT_ROLL:      83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25892.58 SOD {07:11:32.58} UT,   246.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        2.139
  N_STARS:         30
  X_OFFSET:        537 [pixels]
  Y_OFFSET:        470 [pixels]
  X_MAX:           1496 [pixels]
  Y_MAX:           1429 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00286809000msufc0246.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 03"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.25d {+23h 29m 01s}   -1.98d {-01d 58' 50"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:24:54 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 38"} (J2000)
  POINT_ROLL:      83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25892.58 SOD {07:11:32.58} UT,   246.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        2.139
  N_STARS:         30
  X_OFFSET:        537 [pixels]
  Y_OFFSET:        470 [pixels]
  X_MAX:           1496 [pixels]
  Y_MAX:           1429 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00286809000msufc0246.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 03"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.26d {+23h 29m 02s}   -1.98d {-01d 58' 43"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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:     Thu 02 Aug 07 07:25:51 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 38"} (J2000)
  ROLL:            83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25892.58 SOD {07:11:32.58} UT,   246.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  EXPOSURE_ID:     207731494
  X_OFFSET:        856 [pixels]
  Y_OFFSET:        789 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1016
  Y_GRB_POS:       949
  BINNING_INDEX:   1
  IM_URL:          sw00286809000msuni0246.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 02"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.26d {+23h 29m 04s}   -1.97d {-01d 58' 27"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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:     Thu 02 Aug 07 07:26:09 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 38"} (J2000)
  ROLL:            83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  25892.58 SOD {07:11:32.58} UT,   246.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  EXPOSURE_ID:     207731494
  X_OFFSET:        856 [pixels]
  Y_OFFSET:        789 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1016
  Y_GRB_POS:       949
  BINNING_INDEX:   1
  IM_URL:          sw00286809000msuni0246.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 02"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.27d {+23h 29m 04s}   -1.97d {-01d 58' 22"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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_sources_image.fits.gz file does not exist; skipping the attachment.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:27:35 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 37"} (J2000)
  POINT_ROLL:      83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  26501.94 SOD {07:21:41.94} UT,   856.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.201
  N_STARS:         19
  X_OFFSET:        537 [pixels]
  Y_OFFSET:        470 [pixels]
  X_MAX:           1496 [pixels]
  Y_MAX:           1429 [pixels]
  DET_THRESH:      17
  PHOTO_THRESH:    10
  SL_URL:          sw00286809000msufc0856.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 01"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.28d {+23h 29m 07s}   -1.97d {-01d 57' 58"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Thu 02 Aug 07 07:28:03 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 37"} (J2000)
  POINT_ROLL:      83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  26501.94 SOD {07:21:41.94} UT,   856.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        4.201
  N_STARS:         19
  X_OFFSET:        537 [pixels]
  Y_OFFSET:        470 [pixels]
  X_MAX:           1496 [pixels]
  Y_MAX:           1429 [pixels]
  DET_THRESH:      17
  PHOTO_THRESH:    10
  SL_URL:          sw00286809000msufc0856.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 01"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.28d {+23h 29m 08s}   -1.96d {-01d 57' 50"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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:     Thu 02 Aug 07 07:28:57 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 37"} (J2000)
  ROLL:            83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  26501.94 SOD {07:21:41.94} UT,   856.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     207732104
  X_OFFSET:        856 [pixels]
  Y_OFFSET:        789 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1016
  Y_GRB_POS:       949
  BINNING_INDEX:   1
  IM_URL:          sw00286809000msuni0856.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 50' 00"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.29d {+23h 29m 10s}   -1.96d {-01d 57' 35"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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:     Thu 02 Aug 07 07:29:21 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     286809,   Seg_Num: 0
  POINT_RA:         36.829d {+02h 27m 19s} (J2000)
  POINT_DEC:       -55.544d {-55d 32' 37"} (J2000)
  ROLL:            83.883d
  IMG_START_DATE:  14314 TJD;   214 DOY;   07/08/02
  IMG_START_TIME:  26501.94 SOD {07:21:41.94} UT,   856.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     207732104
  X_OFFSET:        856 [pixels]
  Y_OFFSET:        789 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1016
  Y_GRB_POS:       949
  BINNING_INDEX:   1
  IM_URL:          sw00286809000msuni0856.fits
  SUN_POSTN:       132.09d {+08h 48m 22s}  +17.83d {+17d 49' 60"}
  SUN_DIST:        107.54 [deg]   Sun_angle= 6.4 [hr] (West of Sun)
  MOON_POSTN:      352.30d {+23h 29m 11s}   -1.96d {-01d 57' 28"}
  MOON_DIST:        64.46 [deg]
  MOON_ILLUM:      87 [%]
  GAL_COORDS:      278.16,-56.73 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      357.87,-63.05 [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_sources_image.fits.gz file does not exist; skipping the attachment.  
  

  
• GCN Circular #6692
  S. D. Barthelmy (GSFC), P. A. Evans (U Leicester), N. Gehrels (NASA/GSFC), S. Immler (GSFC/UMCP), V. Mangano (INAF-IASFPA), C. B. Markwardt (CRESST/GSFC/UMD), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), P. Romano (Univ. Bicocca & INAF-OAB), G. Sato (GSFC/ISAS), B. Sbarufatti (INAF-IASFPA), M. Stamatikos (NASA/ORAU), G. Tagliaferri (INAF-OAB), D. E. Vanden Berk (PSU) and S. D. Vergani (DIAS-DCU) report on behalf of the Swift Team:
  At 07:07:25 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070802 (trigger=286809). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 36.851, -55.536 which is

     RA(J2000)  =  02h 27m 24s
     Dec(J2000) = -55d 32' 10"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a peak with a duration of roughly 30 sec. The peak count rate was ~1000 counts/sec (15-350 keV), at ~6 sec after the trigger.
  The XRT began taking data at 07:09:43 UT, 138 seconds after the BAT trigger. The XRT on-board centroid algorithm did not find a source in the image, however using 510s of promptly available data we find an uncatalogued source at Ra, Dec=36.8987, -55.2781 degrees, which is equivalent to:

    RA(J2000) =  02h 27m 35.69s
    Dec(J2000) = -55d 31' 40.1"
  

  with an estimated uncertainty of 4.4 arcsec (radius, 90% containment). This source is 101.6 arcsec from the BAT position, within the BAT error circle.
  UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 141 seconds after the BAT trigger. No afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 25% of the BAT error circle. The typical 3-sigma upper limit has been about 18.5 mag. The 8'x8' region for the list of sources generated on-board covers 100% of the BAT error circle. The list of sources is typically complete to about 18 mag. No correction has been made for extinction of E(B-V) = 0.026.
  S. Immler is the burst advocate for this burst. Please contact him for any questions concerning this burst: immler AT milkyway.gsfc.nasa.gov .
• GCN Circular #6693
  E. Berger and D. Murphy (Carnegie) report:
  "We obtained a 180 sec R-band image of the position of GRB 070802 (GCN 6692) starting at 2007 August 2, 07:35:13 UT. We do not find any objects within the XRT error circle to a limit of R~21 mag. Further observations are in progress."
• GCN Circular #6694
  J. Greiner, C. Clemens, T. Kruehler, A. Kuepcue-Yoldas, N. Primak, G. Szokoly, A. Yoldas (all MPE Garching) and S. Klose (Tautenburg Obs.) report:
  The 7-channel imager GROND at the 2.2 m telescope of the La Silla Observatory (ESO/Chile) is observing the field of GRB 070802 (Swift trigger 286809, Barthelmy et al. 2007, GCN #6692). The observation started on August 2 at 07:17 UT, about 10 min after the GRB trigger. Observations are still ongoing. The observation consists of a series of exposures in g', r', i, z', Js, H and Ks. The automated data reduction pipeline finds an elongated source in the XRT error circle. This source has a magnitude of about Js = 20. This is the result of our first four minutes exposure.
• GCN Circular #6695
  E. Berger and D. Murphy (Carnegie) report:
  "We also obtained a 360 sec I-band image of the position of GRB 070802 (GCN 6692) starting on 2007 August 2, 08:02:19 UT. Within the XRT error circle we detect a faint source with I~21.5 mag located at:

   	RA = 02:27:35.88
   	DEC = -55:31:39.3
  

  with an uncertainty of about 0.5" in each coordinate. If this is the afterglow of GRB 070802 the earlier non-detection in R-band may indicate a redshift z~4.5-6, or a highly reddened GRB at a lower redshift."
• GCN Circular #6696
  D. Malesani, J.P.U. Fynbo, P.M. Vreeswijk (DARK) report on behalf of a larger collaboration:
  We observed the field of GRB 070802 (Barthelmy et al., GCN 6692) with the ESO VLT equipped with FORS2. Inside the XRT error circle, we detect the object reported by Berger & Murphy (GCN 6695) and possibly Greiner et al. (GCN 6694), at the coordinates

  RA = 02:27:35.72
  Dec = -55:31:39.01
  

  The object is detected in the V, R, and I bands. No clear fading behaviour is detected between exposures taken at 8:01 UT and 8:13 UT.
  We acknowledge excellent support from the ESO staff, in particular Alain Smette.
• GCN Circular #6697
  P.A. Evans (U. Leicester) and V. Mangano (INAF-IASFPA) report on behalf of the Swift/XRT team:
  We have reanalysed the promptly downlinked XRT data of GRB 070802 (Barthelmy et al. GCN Circ 6692) using PSF fitting and exposure maps to improve the XRT position. We find an improved position of RA, Dec=36.89776, -55.52851 whic is equivalent to:

  RA (J2000)  = 02 27 35.46
  Dec (J2000) = -55 31 42.7
  

  With an uncertainty of 4.7" (radius, 90% containment). This position is 3.3" from the original XRT position sent out in GCN Circ. 6692.
  This circular is an official product of the Swift team.
• GCN Circular #6698
  J.X. Prochaska (UCO/Lick), C.C. Thoene, D. Malesani, J.P.U. Fynbo, P.M. Vreeswijk (DARK), report:
  We observed the candidate afterglow of GRB 070802 (Barthelmy et al., GCN 6692; Berger et al., GCN 6695) with the ESO VLT + FORS2. A 30-min spectrum was acquired starting on Aug 2.378 UT. From the detection of several Fe lines, we measure z=2.45.
  We acknoweldge excellent support from the VLT staff, in particular Alain Smette.
• GCN Circular #6699
  J. Cummings (GSFC/UMBC), L. Barbier (GSFC), S. D. Barthelmy (GSFC), E. Fenimore (LANL), N. Gehrels (GSFC), S. Immler (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU) (i.e. the Swift-BAT team):
  Using the data set from T-239 to T+776 sec from recent telemetry downlinks, we report further analysis of BAT GRB 070802 (trigger #286809) (Barthelmy, et al., GCN Circ. 6692). The BAT ground-calculated position is RA, Dec = 36.903, -55.517 deg, which is

     RA(J2000)  =   2h 27m 36.7s 
     Dec(J2000) = -55d 31' 01" 
  

  with an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 73%.
  The mask-weighted light curve for this 64-sec image trigger shows a single peak starting at T+5 sec and ending at ~T+50 sec. We note that there is a 3-sigma blip at T-150 lasting about 20 sec. T90 (15-350 keV) is 16.4 +- 1.0 sec (estimated error including systematics).
  The time-averaged spectrum from T+4.9 to T+23.2 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.79 +- 0.27. The fluence in the 15-150 keV band is 2.8 +- 0.5 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+6.15 sec in the 15-150 keV band is 0.4 +- 0.1 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
• GCN Circular #6700
  D. Malesani, J.P.U. Fynbo, J. Hjorth, and P.M. Vreeswijk (DARK) report on behalf of a larger collaboration:
  We report further analysis of our images (Malesani et al., GCN 6696) of GRB 070802 (Barthelmy et al., GCN 6692). Observations span the range 08:01 - 10:09 UT, that is 0.9 - 3.0 hr after the GRB. The object reported by Greiner et al. (GCN 6694) and Berger & Murphy (GCN 6695) is well detected in all our images, and is clearly fading following a power-law decay with index alpha = 0.6+-0.1. Based on instrumental zeropoints, the afterglow looks significantly reddened, with a color R-I = 0.55+-0.1.
  We acknowledge excellent support from the VLT staff.
• GCN Circular #6701
  N.P.M. Kuin (MSSL) and S. Immler (GSFC) report on behalf of the Swift-UVOT team:
  The Swift/UVOT observed the field of GRB070802 (trigger=3D286809)=20 starting 2007-08-02 at 07:09:30, 125 s after the BAT trigger (Barthelmy=20 et al. 2007, GCN Circ.6692). We do not find a new source in the UVOT=20 observations at the location of the refined XRT position (Evans and=20 Mangano, 2007, GCN Circ. 6697).
  The 3-sigma upper limits (in the UVOT photometric system, Breeveld et=20 al., GCN Circ. 6614) for detecting a source inside the XRT error circle=20 in the co-added frames (including the settling exposure and finding=20 charts) are listed below:

  Filter		Tstart	Tstop	Exposure	Magnitude
  		(s)		(s)		(s)		(3-sigma UL)
  white	142		16875	589.9	>21.25
  v		125		12514	773.2	>19.96
  uvm2	654		4821	239.4	>19.84
  uvw1	679		4969	182.3	>19.77
  u		703		6307	219.6	>19.52
  b		728		16681	1109.0	>21.27
  uvw2	758		10893	1127.5	>21.16
  

  The values quoted above are not corrected for the expected Galactic=20 extinction corresponding to a reddening of E_{B-V} =3D 0.026 mag in the=20 direction of the burst (Schlegel et al. 1998).
• GCN Circular #6702
  V. Mangano, B. Sbarufatti, V. La Parola, E. Troja (INAF-IASF PA), P. Evans (U. Leicester) and S. Immler (GSFC) report on behalf of the Swift-XRT team:
  We have analysed the first three orbits of Swift-XRT data obtained for GRB 070802 (Barthelmy et al, GCN Circ. 6692), which include 3.4 ks of Photon Counting (PC) data.
  Using 599 s of overlapping XRT Photon Counting mode and UVOT V-band data, 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 = 36.89899, -55.52733 which is equivalent to:

  RA (J2000):  02 27 35.76
  Dec (J2000): -55 31 38.4
  

  with an uncertainty of 2.1 arcsec (radius, 90% confidence). This is 4.9 arcsec from the initial XRT position (Evans and Mangano, GCN Circ. 6697) and 38 arcsec from the BAT ground-calculated position (Cummings et al, GCN Circ. 6699). It is also 0.7 arcsec from the optical position of Malesani et al. (GCN Circ. 6696) and 1.4 arcsec from the I band position of Berger and Murphy (GCN Circ. 6695).
  The XRT light-curve decays with slope -2.0+/-0.2 up to about T+500 s, then flattens to slope -0.25+/-0.08. We do not see a further break up to T+17 ks.
  The spectrum can be fit with an absorbed power law with a photon index of 1.9+/-0.3 and a column density consistent with the Galactic value (2.9e20 cm^-2). The absorbed (unabsorbed) 0.3-10.0keV flux for the spectrum is (3.9+/-0.8)e-12 ((4.6+/-0.8)e-12) ergs cm^-2 s^-1.
  If the decay continues with a slope of ~ 0.2, the count rate at 24 hours is predicted to be 3e-2 count s^-1. Using the spectral fit described above, this corresponds to an observed flux of about 1.4e-12 ergs cm^-2 s^-1.
  This circular is an official product of the XRT team.
• GCN Circular #6704
  E.Palazzi, S. Covino, L.A. Antonelli, L. Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, P. D'Avanzo, V. D'Elia, F. Dalessio, F. Fiore, D. Fugazza, P. Goldoni, D. Guetta, C. Guidorzi, G.L. Israel, D. Malesani, N. Masetti, A. Melandri, E. Meurs, L. Nicastro, E. Pian, S. Piranomonte, D. Rizzuto, L. Stella, G. Stratta, G. Tagliaferri, G. Tosti, V. Testa, S.D. Vergani, F. Vitali report on behalf of the REM team:
  "We observed the field of the GRB 070802 (S. D. Barthelmy et al., GCN 6692) with the robotic 60-cm REM telescope located at La Silla (Chile). A set of observations was performed automatically in the R optical filter starting at 07:17:44 UT (52 sec after the Swift alert; about 10 minutes after the burst) and lasted about 40 minutes.
  The analysis of the first 15 minutes exposures do not show the optical/NIR afterglow candidate reported by J. Greiner et al (GCN 6694), E. Berger et al (GCN. 6695), D. Malesani et al (GCN. 6696). The 3-sigma limiting magnitude in the stacked images is R~17.0"
• GCN Report 78.1
  GCN_Report 78.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_78_1.pdf by S. Immler at CRESST/NASA/GSFC titled: "Swift observations of GRB 070802"
• 1205.0387 from 3 May 12
  Tayyaba Zafar et al.: The properties of the 2175AA extinction feature discovered in GRB afterglows
  Giorgos Leloudas (1), Pall Jakobsson (4), Christina C. Thone (5), Daniel A. Perley (6), Adam N. Morgan (6), Joshua Bloom (6), Jochen Greiner (3) ((1) DARK, (2) LAM, (3) MPI, (4) Univ. of Iceland (5) Univ. of California) The unequivocal, spectroscopic detection of the 2175 bump in extinction curves outside the Local Group is rare. To date, the properties of the bump have been examined in only two GRB afterglows (GRB 070802 and GRB 080607). In this work we analyse in detail the detections of the 2175 extinction bump in the optical spectra of the two further GRB afterglows: GRB 080605 and 080805. We gather all available optical/NIR photometric, spectroscopic and X-ray data to construct multi-epoch SEDs for both GRB afterglows. We fit the SEDs with the Fitzpatrick & Massa (1990) model with a single or broken PL. We also fit a sample of 38 GRB afterglows, known to prefer a SMC-type extinction curve, with the same model. We find that the SEDs of GRB 080605 and GRB 080805 at two epochs are fit well with a single PL with a derived extinction of A_V = 0.52(+0.13 -0.16) and 0.50 (+0.13 -0.10), and 2.1(+0.7-0.6) and 1.5+/-0.2 respectively. While the slope of the extinction curve of GRB 080805 is not well-constrained, the extinction curve of GRB 080605 has an unusual very steep far-UV rise together with the 2175 bump. Such an extinction curve has previously been found in only a small handful of sightlines in the MW. One possible explanation of such an extinction curve may be dust arising from two different regions with two separate grain populations, however we cannot distinguish the origin of the curve. We finally compare the four 2175 bump sightlines to the larger GRB afterglow sample and to Local Group sightlines. We find that while the width and central positions of the bumps are consistent with what is observed in the Local Group, the relative strength of the detected bump (A_bump) for GRB afterglows is weaker for a given A_V than for almost any Local Group sightline. Such dilution of the bump strength may offer tentative support to a dual dust-population scenario.