Gamma-ray Burst 070429

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:36:40 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     277571,   Seg_Num: 0
  GRB_RA:          297.687d {+19h 50m 45s} (J2000),
                   297.804d {+19h 51m 13s} (current),
                   296.889d {+19h 47m 33s} (1950)
  GRB_DEC:         -32.388d {-32d 23' 16"} (J2000),
                   -32.369d {-32d 22' 07"} (current),
                   -32.516d {-32d 30' 55"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       0 [cnts]    Image_Peak=3014 [image_cnts]
  TRIGGER_DUR:     80.000 [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:        14219 TJD;   119 DOY;   07/04/29
  GRB_TIME:        5710.07 SOD {01:35:10.07} UT
  GRB_PHI:         -134.78 [deg]
  GRB_THETA:        28.22 [deg]
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    12.08 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +6  +1  +1  +0  +0 +24  +1 
  SUN_POSTN:        36.00d {+02h 24m 01s}  +14.30d {+14d 17' 51"}
  SUN_DIST:        104.42 [deg]   Sun_angle= 6.5 [hr] (West of Sun)
  MOON_POSTN:      181.09d {+12h 04m 21s}   -2.05d {-02d 03' 16"}
  MOON_DIST:       111.12 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.07,-25.89 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      293.58,-11.19 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  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 = 23.68,19.82 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:38:11 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  GRB_RA:          297.7034d {+19h 50m 48.8s} (J2000),
                   297.8201d {+19h 51m 16.8s} (current),
                   296.9055d {+19h 47m 37.3s} (1950)
  GRB_DEC:         -32.4052d {-32d 24' 18.7"} (J2000),
                   -32.3862d {-32d 23' 10.3"} (current),
                   -32.5329d {-32d 31' 58.4"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       99 [cnts]
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5862.97 SOD {01:37:42.97} UT,   152.9 [sec] since BAT Trigger Time
  CENTROID_X:      311.87,  raw= 312  [pixels]
  CENTROID_Y:      254.12,  raw= 254  [pixels]
  ROLL:            82.07 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -103.43
  GRB_POS_XRT_Z:   22.56
  IMAGE_URL:       sw00277571000msxps_rw.img
  SUN_POSTN:        36.01d {+02h 24m 01s}  +14.30d {+14d 17' 53"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.5 [hr] (West of Sun)
  MOON_POSTN:      181.10d {+12h 04m 24s}   -2.06d {-02d 03' 37"}
  MOON_DIST:       111.11 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.06,-25.90 [deg] galactic lon,lat of the burst
  ECL_COORDS:      293.59,-11.21 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:38:14 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  GRB_RA:          297.7034d {+19h 50m 48.8s} (J2000),
                   297.8201d {+19h 51m 16.8s} (current),
                   296.9055d {+19h 47m 37.3s} (1950)
  GRB_DEC:         -32.4052d {-32d 24' 18.7"} (J2000),
                   -32.3862d {-32d 23' 10.3"} (current),
                   -32.5329d {-32d 31' 58.4"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       99 [cnts]
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5862.97 SOD {01:37:42.97} UT,   152.9 [sec] since BAT Trigger Time
  CENTROID_X:      311.87,  raw= 312  [pixels]
  CENTROID_Y:      254.12,  raw= 254  [pixels]
  ROLL:            82.07 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -103.43
  GRB_POS_XRT_Z:   22.56
  IMAGE_URL:       sw00277571000msxps_rw.img
  SUN_POSTN:        36.01d {+02h 24m 01s}  +14.30d {+14d 17' 53"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.5 [hr] (West of Sun)
  MOON_POSTN:      181.10d {+12h 04m 24s}   -2.06d {-02d 03' 38"}
  MOON_DIST:       111.11 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.06,-25.90 [deg] galactic lon,lat of the burst
  ECL_COORDS:      293.59,-11.21 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:38:10 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     277571,   Seg_Num: 0
  GRB_RA:          297.7034d {+19h 50m 48.8s} (J2000),
                   297.8201d {+19h 51m 16.8s} (current),
                   296.9055d {+19h 47m 37.3s} (1950)
  GRB_DEC:         -32.4052d {-32d 24' 18.7"} (J2000),
                   -32.3862d {-32d 23' 10.3"} (current),
                   -32.5329d {-32d 31' 58.4"} (1950)
  GRB_ERROR:       4.7 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       2.94e-09 [erg/cm2/sec]
  GRB_SIGNIF:      9.94 [sigma]
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5862.97 SOD {01:37:42.97} UT,   152.9 [sec] since BAT Trigger Time
  TAM[0-3]:        327.64 237.23 261.16 243.52
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:        36.01d {+02h 24m 01s}  +14.30d {+14d 17' 52"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.5 [hr] (West of Sun)
  MOON_POSTN:      181.10d {+12h 04m 24s}   -2.06d {-02d 03' 37"}
  MOON_DIST:       111.11 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.06,-25.90 [deg] galactic lon,lat of the burst
  ECL_COORDS:      293.59,-11.21 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:39:21 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     277571,   Seg_Num: 0
  GRB_RA:          297.687d {+19h 50m 45s} (J2000),
                   297.804d {+19h 51m 13s} (current),
                   296.889d {+19h 47m 33s} (1950)
  GRB_DEC:         -32.388d {-32d 23' 16"} (J2000),
                   -32.369d {-32d 22' 07"} (current),
                   -32.516d {-32d 30' 55"} (1950)
  GRB_DATE:        14219 TJD;   119 DOY;   07/04/29
  GRB_TIME:        5710.07 SOD {01:35:10.07} UT
  TRIGGER_INDEX:   20000
  GRB_PHI:         -134.78 [deg]
  GRB_THETA:        28.22 [deg]
  DELTA_TIME:      0.00 [sec]
  TRIGGER_DUR:     80.000 [sec] 
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    12.08 [sigma]
  LC_URL:          sw00277571000msb.lc
  SUN_POSTN:        36.01d {+02h 24m 01s}  +14.30d {+14d 17' 53"}
  SUN_DIST:        104.42 [deg]   Sun_angle= 6.5 [hr] (West of Sun)
  MOON_POSTN:      181.11d {+12h 04m 26s}   -2.07d {-02d 03' 53"}
  MOON_DIST:       111.09 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.07,-25.89 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      293.58,-11.19 [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 = 23.68,19.82 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:39:58 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.706d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.375d {-32d 22' 30"} (J2000)
  POINT_ROLL:      82.067d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5871.21 SOD {01:37:51.21} UT,   161.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.315
  N_STARS:         87
  X_OFFSET:        408 [pixels]
  Y_OFFSET:        672 [pixels]
  X_MAX:           1367 [pixels]
  Y_MAX:           1631 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    6
  SL_URL:          sw00277571000msufc0161.fits
  SUN_POSTN:        36.01d {+02h 24m 02s}  +14.30d {+14d 17' 54"}
  SUN_DIST:        104.40 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.11d {+12h 04m 27s}   -2.07d {-02d 04' 02"}
  MOON_DIST:       111.11 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:40:25 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.706d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.375d {-32d 22' 30"} (J2000)
  POINT_ROLL:      82.067d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5871.21 SOD {01:37:51.21} UT,   161.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.315
  N_STARS:         87
  X_OFFSET:        408 [pixels]
  Y_OFFSET:        672 [pixels]
  X_MAX:           1367 [pixels]
  Y_MAX:           1631 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    6
  SL_URL:          sw00277571000msufc0161.fits
  SUN_POSTN:        36.01d {+02h 24m 02s}  +14.30d {+14d 17' 54"}
  SUN_DIST:        104.40 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.12d {+12h 04m 28s}   -2.07d {-02d 04' 08"}
  MOON_DIST:       111.10 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:41:17 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.706d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.375d {-32d 22' 30"} (J2000)
  ROLL:            82.067d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5871.21 SOD {01:37:51.21} UT,   161.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     199503473
  X_OFFSET:        862 [pixels]
  Y_OFFSET:        1068 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1022
  Y_GRB_POS:       1228
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0161.fits
  SUN_POSTN:        36.01d {+02h 24m 02s}  +14.30d {+14d 17' 55"}
  SUN_DIST:        104.40 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.12d {+12h 04m 29s}   -2.07d {-02d 04' 20"}
  MOON_DIST:       111.10 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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:     Sun 29 Apr 07 01:41:31 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.706d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.375d {-32d 22' 30"} (J2000)
  ROLL:            82.067d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5871.21 SOD {01:37:51.21} UT,   161.1 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     199503473
  X_OFFSET:        862 [pixels]
  Y_OFFSET:        1068 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1022
  Y_GRB_POS:       1228
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0161.fits
  SUN_POSTN:        36.01d {+02h 24m 02s}  +14.30d {+14d 17' 55"}
  SUN_DIST:        104.40 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.12d {+12h 04m 30s}   -2.07d {-02d 04' 24"}
  MOON_DIST:       111.10 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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:     Sun 29 Apr 07 01:48:13 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  POINT_ROLL:      82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5976.80 SOD {01:39:36.80} UT,   266.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        2.209
  N_STARS:         132
  X_OFFSET:        542 [pixels]
  Y_OFFSET:        748 [pixels]
  X_MAX:           1501 [pixels]
  Y_MAX:           1707 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00277571000msufc0266.fits
  SUN_POSTN:        36.01d {+02h 24m 03s}  +14.30d {+14d 18' 00"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.17d {+12h 04m 41s}   -2.10d {-02d 05' 58"}
  MOON_DIST:       111.04 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:48:42 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  POINT_ROLL:      82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5976.80 SOD {01:39:36.80} UT,   266.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        2.209
  N_STARS:         132
  X_OFFSET:        542 [pixels]
  Y_OFFSET:        748 [pixels]
  X_MAX:           1501 [pixels]
  Y_MAX:           1707 [pixels]
  DET_THRESH:      12
  PHOTO_THRESH:    6
  SL_URL:          sw00277571000msufc0266.fits
  SUN_POSTN:        36.01d {+02h 24m 03s}  +14.30d {+14d 18' 01"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.18d {+12h 04m 42s}   -2.10d {-02d 06' 05"}
  MOON_DIST:       111.04 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:49:38 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  ROLL:            82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5976.80 SOD {01:39:36.80} UT,   266.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  EXPOSURE_ID:     199503578
  X_OFFSET:        862 [pixels]
  Y_OFFSET:        1068 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1022
  Y_GRB_POS:       1228
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0266.fits
  SUN_POSTN:        36.01d {+02h 24m 03s}  +14.30d {+14d 18' 01"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.18d {+12h 04m 44s}   -2.11d {-02d 06' 18"}
  MOON_DIST:       111.03 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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:     Sun 29 Apr 07 01:49:57 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  ROLL:            82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  5976.80 SOD {01:39:36.80} UT,   266.7 [sec] since BAT Trigger Time
  FILTER:          3, V
  EXPOSURE_ID:     199503578
  X_OFFSET:        862 [pixels]
  Y_OFFSET:        1068 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1022
  Y_GRB_POS:       1228
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0266.fits
  SUN_POSTN:        36.01d {+02h 24m 03s}  +14.30d {+14d 18' 02"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.19d {+12h 04m 45s}   -2.11d {-02d 06' 22"}
  MOON_DIST:       111.02 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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 Circular #6355
  S. D. Barthelmy (GSFC), C. B. Markwardt (GSFC/UMD), K. L. Page (U Leicester), D. M. Palmer (LANL), G. Sato (GSFC/ISAS), M. Stamatikos (NASA/ORAU) and R. L. C. Starling (U Leicester) report on behalf of the Swift Team:
  At 01:35:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 070429 (trigger=277571). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 297.687, -32.388 which is

     RA(J2000)  =  19h 50m 45s
     Dec(J2000) = -32d 23' 16"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical for image trigger GRBs, the BAT light curve shows little obvious variation. A detailed light curve will require the data downlinked via Malindi.
  The XRT began observing the field at 01:37:42 UT, 153 seconds after the BAT trigger. XRT found a fading, uncatalogued X-ray source located at RA, Dec 297.7034, -32.4052 which is

     RA(J2000)  =  19h 50m 48.8s
     Dec(J2000) = -32d 24' 18.7"
  

  with an uncertainty of 4.7 arcseconds (radius, 90% containment). This location is 79 arcseconds from the BAT on-board position, within the BAT error circle. The initial flux in the 2.5s image was 2.9e-09 erg/cm2/s (0.2-10 keV).
  UVOT took a finding chart exposure of 100 seconds with the White (160-650 nm) filter starting 161 seconds after the BAT trigger. No 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 18.5 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 0.17 magnitudes.
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:51:46 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  POINT_ROLL:      82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6581.72 SOD {01:49:41.72} UT,   871.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.588
  N_STARS:         109
  X_OFFSET:        542 [pixels]
  Y_OFFSET:        748 [pixels]
  X_MAX:           1501 [pixels]
  Y_MAX:           1707 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00277571000msufc0871.fits
  SUN_POSTN:        36.01d {+02h 24m 03s}  +14.30d {+14d 18' 03"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.20d {+12h 04m 48s}   -2.11d {-02d 06' 48"}
  MOON_DIST:       111.01 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:52:12 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  POINT_ROLL:      82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6581.72 SOD {01:49:41.72} UT,   871.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.588
  N_STARS:         109
  X_OFFSET:        542 [pixels]
  Y_OFFSET:        748 [pixels]
  X_MAX:           1501 [pixels]
  Y_MAX:           1707 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00277571000msufc0871.fits
  SUN_POSTN:        36.01d {+02h 24m 03s}  +14.30d {+14d 18' 03"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.20d {+12h 04m 48s}   -2.12d {-02d 06' 54"}
  MOON_DIST:       111.01 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:53:10 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  ROLL:            82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6581.72 SOD {01:49:41.72} UT,   871.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     199504183
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        1067 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1227
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0871.fits
  SUN_POSTN:        36.02d {+02h 24m 04s}  +14.30d {+14d 18' 04"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.21d {+12h 04m 50s}   -2.12d {-02d 07' 07"}
  MOON_DIST:       111.00 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:53:27 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  ROLL:            82.070d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6581.72 SOD {01:49:41.72} UT,   871.7 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     199504183
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        1067 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1227
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0871.fits
  SUN_POSTN:        36.02d {+02h 24m 04s}  +14.30d {+14d 18' 04"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.21d {+12h 04m 51s}   -2.12d {-02d 07' 11"}
  MOON_DIST:       111.00 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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 #6356
  E.S. Rykoff (U Mich), B. E. Schaefer (Louisiana State), H. Swan (U Mich), report on behalf of the ROTSE collaboration:
  ROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, responded to GRB 070429 (Swift trigger 277571, GCN 6355, Barthelmy, et al), producing images beginning 6.7 s after the GCN notice time. An automated response took the first image at 01:36:46.7 UT, 96.6 s after the burst, under good conditions. We took 10 5-sec, 10 20-sec exposures; imaging is ongoing. These unfiltered images are calibrated relative to USNO A2.0 (R).
  Comparison to the DSS (second epoch) reveals no new sources within the 3-sigma BAT error circle or the XRT error circle, for both single images and coadding into sets of 10; however, we are limited as the field is somewhat crowded. Individual images have limiting magnitudes ranging from 16.1-17.1; we set the following specific limits.

  start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
  --------------------------------------------------------------------
  01:36:46.7   01:36:51.7         5     16.2           96.6       N
  01:36:46.7   01:38:04.4        77     17.3           96.6       Y
  01:38:19.4   01:43:08.1       288     18.0          189.3       Y
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:58:32 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  POINT_ROLL:      82.069d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6687.34 SOD {01:51:27.34} UT,   977.3 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        2.645
  N_STARS:         119
  X_OFFSET:        542 [pixels]
  Y_OFFSET:        748 [pixels]
  X_MAX:           1501 [pixels]
  Y_MAX:           1707 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00277571000msufc0977.fits
  SUN_POSTN:        36.02d {+02h 24m 04s}  +14.30d {+14d 18' 08"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.25d {+12h 04m 59s}   -2.14d {-02d 08' 23"}
  MOON_DIST:       110.96 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:58:59 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  POINT_ROLL:      82.069d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6687.34 SOD {01:51:27.34} UT,   977.3 [sec] since BAT Trigger Time
  FILTER:          3, V
  BKG_MEAN:        2.645
  N_STARS:         119
  X_OFFSET:        542 [pixels]
  Y_OFFSET:        748 [pixels]
  X_MAX:           1501 [pixels]
  Y_MAX:           1707 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    7
  SL_URL:          sw00277571000msufc0977.fits
  SUN_POSTN:        36.02d {+02h 24m 05s}  +14.30d {+14d 18' 09"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.25d {+12h 05m 00s}   -2.14d {-02d 08' 29"}
  MOON_DIST:       110.95 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 01:59:56 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  ROLL:            82.069d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6687.34 SOD {01:51:27.34} UT,   977.3 [sec] since BAT Trigger Time
  FILTER:          3, V
  EXPOSURE_ID:     199504289
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        1067 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1227
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0977.fits
  SUN_POSTN:        36.02d {+02h 24m 05s}  +14.30d {+14d 18' 10"}
  SUN_DIST:        104.41 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.26d {+12h 05m 02s}   -2.15d {-02d 08' 42"}
  MOON_DIST:       110.94 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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 Circular #6357
  Nobody from UVOT or PSU was on the burst telecon, so we looked at the UVOT data, saw nothing, and used the automatic paragraph.
  There was nobody to check the temperature, so that should be done when someone who can do it reads this.
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 29 Apr 07 02:00:14 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     277571,   Seg_Num: 0
  POINT_RA:        297.705d {+19h 50m 49s} (J2000)
  POINT_DEC:       -32.377d {-32d 22' 37"} (J2000)
  ROLL:            82.069d
  IMG_START_DATE:  14219 TJD;   119 DOY;   07/04/29
  IMG_START_TIME:  6687.34 SOD {01:51:27.34} UT,   977.3 [sec] since BAT Trigger Time
  FILTER:          3, V
  EXPOSURE_ID:     199504289
  X_OFFSET:        861 [pixels]
  Y_OFFSET:        1067 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1021
  Y_GRB_POS:       1227
  BINNING_INDEX:   1
  IM_URL:          sw00277571000msuni0977.fits
  SUN_POSTN:        36.02d {+02h 24m 05s}  +14.30d {+14d 18' 10"}
  SUN_DIST:        104.42 [deg]   Sun_angle= 6.6 [hr] (West of Sun)
  MOON_POSTN:      181.26d {+12h 05m 02s}   -2.15d {-02d 08' 47"}
  MOON_DIST:       110.94 [deg]
  MOON_ILLUM:      90 [%]
  GAL_COORDS:        8.09,-25.90 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      293.59,-11.18 [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 #6361
  A. de Ugarte Postigo, A.J. Castro-Tirado, M. Jelinek, P. Kubanek, R. Cunniffe, S. Vitek, J. Gorosabel (IAA-CSIC), I. Skillen (ING) L. Sabau-Graziati (INTA) report:
  Robotic observations from the 0.6m BOOTES-IR telescope in R and z bands started at 3:50 UT (3.25 hours after the burst), as soon as the object became visible from the observatory. No source is detected inside the XRT error box.
  We have observed the field of GRB 070429A with the 4.2m WHT+LIRIS in J, H and K bands starting at 05:44:00 UT (4.148 hours after the burst). Preliminary reduction of the K-band data shows a faint source at the following coordinates (J2000 +/- 1"):

  R.A.: 19:50:48.90
  Dec.: -32:24:17.0
  

  A finding chart can be found at: http://www.iaa.es/~deugarte/GRBs/070429A/GRB070429A.gif
  Further analysis to check variability and colour of this source is ongoing.
  
• GCN Circular #6362
  J. Cannizzo (GSFC/UMBC), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (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) on behalf of the Swift-BAT team:
  Using the data set from T-239.0 to T+963.1 sec from the recent telemetry downlink, we report further analysis of BAT GRB 070429 (trigger #277571) (Barthelmy, et al., GCN Circ. 6355). The BAT ground-calculated position is RA, Dec = 297.695, -32.420 deg which is

      RA(J2000) = 19h 50m 46.9s
      Dec(J2000) = -32d 25' 12.1"
  

  with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 68%.
  The masked weighted light curve shows a single somewhat broad peak, extending out to T+50 sec, followed by several smaller peaks. T90 (15-350 keV) is 163 +- 5sec (estimated error including systematics).
  The time-averaged spectrum from T-12.4 to T+178.0 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.11 +- 0.27. The fluence in the 15-150 keV band is 9.2 +- 1.4 x 10-07 erg/cm2. The 1-sec peak photon flux measured from T+3.99 sec in the 15-150 keV band is 0.4 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
• GCN Circular #6363
  R.L.C. Starling, A.P. Beardmore, K.L. Page, P.A. Evans (U. Leicester) and J. Cannizzo (GSFC/UMBC) report on behalf of the Swift XRT team:
  We have analysed Swift XRT data from the first orbit of Windowed Timing mode and two subsequent orbits in Photon Counting (PC) mode for GRB 070429A (trigger 277571, Barthelmy et al. GCN Circ 6355).
  Using 380s of overlapping XRT PC mode data and UVOT V-band data, we obtain an astrometrically corrected (using the USNO-B1 catalogue) X-ray position of RA, Dec (J2000) = 297.70333, -32.40497, which is

  RA(J2000) =   19h 50m 48.80s
  Dec(J2000) = -32d 24' 17.9"
  

  with an estimated uncertainty of 2.4 arcsec (90% error radius). This is 1.0 arcsec from the XRT position in GCN 6355 and 1.6 arcsec from the possible K-band optical transient report by de Ugarte Postigo et al. (GCN Circ 6361).
  The lightcurve is well fitted by a broken power law with alpha1=6.4+0.3/-0.4, Tbreak=235+2/-20 s and alpha2=3.2+0.3/-0.2.
  The PC mode spectrum can be fit with a single absorbed power law. The photon index is 1.8+0.4/-0.2 and the absorption is centred at 1.3E21 cm^-2 but is poorly constrained. The Galactic column towards this position is 0.9E21 cm^-2. The 0.3-10 keV flux is 1.25E-11 erg/cm^2/s, corresponding to 0.11 cts/s.
  We are now in a data gap for this source, whilst Swift is observing GRB 070429B, so the current decay rate is not known, hence we do not give a predicted count rate for 24hr. Further Swift observations of this source are planned.
  This circular is an official product of the Swift XRT team.
• GCN Circular #6364
  P. Schady (MSSL/PSU) and J. Cannizzo (GSFC/UMBC) report on behalf of the Swift UVOT team:
  Swift/UVOT observed the field of GRB 070429A starting 211s after the BAT trigger. No new source is detected either within the refined XRT position (GCN 6363) or at the position reported by Ugarte Postigo et al. (GCN 6361) in any of the UVOT filters, in either single or co-added exposures. The 3-sigma upper limits for the co-added exposures in each filter are as follows:

  Filter        T_mid       Exp.     Mag 3-sig UL
                        (s)           (s)
  White       850          253      19.43
  V               1104       903      19.75
  B               1700       107      19.30
  U               1598       117      18.96
  UVW1      3535        259     19.19
  UVM2       3951       333     19.61
  UVW2      1659        117     19.07
  

  where T_mid is the weighted mid time of the co-added images. The reported upper limits are uncorrected for the estimated Galactic reddening of E(B-V) = 0.17 mag.
• GCN Circular #6371
  P.A. Price (IfA, Hawaii) reports on behalf of a larger collaboration:
  We observed the XRT position of GRB 070429A (GCN ##6355,6363) with the Gemini North telescope + GMOS, commencing at 2007 Apr 29.58 UT (12.3 hours after the GRB). Observations consisted of 2x180 sec integrations in Sloan i' and 4x180 sec in Sloan z'.
  The source identified by de Ugarte Postigo et al. (GCN #6361) is well detected in these observations, though no statement as to its variability can yet be made. In addition, there is a fainter source within the XRT error circle, at coordinates:
  19:50:48.77 -32:24:17.8 J2000
  NIR imaging of this GRB has also been made, and will be reduced as practical. No further observations are planned.
  We thank the Gemini North staff for helpful support of these quick response observations.
• GCN Report 52.1
  GCN_Report 52.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_52_1.pdf by J.K. Cannizzo at CRESST/UMBC/NASA/GSFC titled: "Swift Observations of GRB 070429A"
• GCN Circular #6373
  R.L.C. Starling, P.A. Evans, K.L. Page and A. Beardmore (U. Leicester) report on behalf of the Swift XRT team:
  We have further analysed the Swift XRT data for GRB 070429A (Barthelmy et al., GCN Circ. 6355) out to 290 ks since the BAT trigger. The steep lightcurve decay reported in GCN Circ. 6363 has broken at T+1100 s to a slope of alpha~0.37. This plateau phase continues through the observations to date, out to about T0+290 ks, with a current count rate of ~0.006 count/s corresponding to a flux of 1.8e-12 erg/cm^-2/s. Probable X-ray flaring activity is seen during this phase.
  The duration of the plateau phase is longer than that normally observed in GRBs showing a similar phase (e.g. Nousek et al. 2006; O'Brien et al. 2006), hence the source remains X-ray bright. Continuation of optical and infrared observations of GRB 070429A is therefore strongly encouraged.
  This circular is an official product of the Swift XRT team.