Gamma-ray Burst 090715B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:10:59 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     357512,   Seg_Num: 0
  GRB_RA:          251.344d {+16h 45m 23s} (J2000),
                   251.416d {+16h 45m 40s} (current),
                   250.966d {+16h 43m 52s} (1950)
  GRB_DEC:         +44.827d {+44d 49' 36"} (J2000),
                   +44.810d {+44d 48' 35"} (current),
                   +44.917d {+44d 54' 60"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       5636 [cnts]    Image_Peak=332 [image_cnts]
  TRIGGER_DUR:     1.024 [sec] 
  TRIGGER_INDEX:   146     E_range: 25-100 keV
  BKG_INTEN:       30987 [cnts]
  BKG_TIME:        75779.08 SOD {21:02:59.08} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        15027 TJD;   196 DOY;   09/07/15
  GRB_TIME:        75794.63 SOD {21:03:14.63} UT
  GRB_PHI:         -66.34 [deg]
  GRB_THETA:         5.29 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     24.95 [sigma]
  IMAGE_SIGNIF:    11.48 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +0  +2  +1  +0  +0 +21  +0 
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 36"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.09d {+01h 40m 22s}  +16.12d {+16d 07' 15"}
  MOON_DIST:       105.96 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.10, 40.65 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      235.98, 66.08 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;  
  COMMENTS:        probably due to it occurring during a Malindi downlink session.  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 18.96,-20.43 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:11:54 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     357512,   Seg_Num: 0
  GRB_RA:          251.3405d {+16h 45m 21.71s} (J2000),
                   251.4127d {+16h 45m 39.04s} (current),
                   250.9624d {+16h 43m 50.97s} (1950)
  GRB_DEC:         +44.8377d {+44d 50' 15.7"} (J2000),
                   +44.8207d {+44d 49' 14.6"} (current),
                   +44.9276d {+44d 55' 39.5"} (1950)
  GRB_ERROR:       4.9 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       4.19e-09 [erg/cm2/sec]
  GRB_SIGNIF:      10.90 [sigma]
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75840.88 SOD {21:04:00.88} UT,   46.2 [sec] since BAT Trigger Time
  TAM[0-3]:        327.65 237.23 261.42 243.45
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 36"}
  SUN_DIST:        102.62 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.10d {+01h 40m 24s}  +16.12d {+16d 07' 25"}
  MOON_DIST:       105.96 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.11, 40.65 [deg] galactic lon,lat of the burst
  ECL_COORDS:      235.97, 66.09 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        The XRT position is 0.68 arcmin from the BAT position.  
  COMMENTS:        The object found at this position is either a very bright burst or a cosmic ray hit.  
  COMMENTS:        Examine the XRT Image to differentiate (CRs are much more compact); see examples at:  
  COMMENTS:        http://www.swift.psu.edu/xrt/XRT_Postage_Stamp_Image_Photo_Gallery.htm .  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:12:03 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     357512,   Seg_Num: 0
  GRB_RA:          251.3405d {+16h 45m 21.7s} (J2000),
                   251.4127d {+16h 45m 39.0s} (current),
                   250.9624d {+16h 43m 50.9s} (1950)
  GRB_DEC:         +44.8377d {+44d 50' 15.7"} (J2000),
                   +44.8207d {+44d 49' 14.6"} (current),
                   +44.9276d {+44d 55' 39.5"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       119 [cnts]
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75840.88 SOD {21:04:00.88} UT,   46.2 [sec] since BAT Trigger Time
  CENTROID_X:      280.01,  raw= 280  [pixels]
  CENTROID_Y:      284.77,  raw= 285  [pixels]
  ROLL:            318.49 [deg]
  GAIN:            2
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -31.16
  GRB_POS_XRT_Z:   -52.54
  IMAGE_URL:       sw00357512000msxps_rw.img
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 36"}
  SUN_DIST:        102.62 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.10d {+01h 40m 24s}  +16.12d {+16d 07' 27"}
  MOON_DIST:       105.96 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.11, 40.65 [deg] galactic lon,lat of the burst
  ECL_COORDS:      235.97, 66.09 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:12:54 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.345d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.821d {+44d 49' 15"} (J2000)
  POINT_ROLL:      318.491d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75848.08 SOD {21:04:08.08} UT,   53.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.375
  N_STARS:         56
  X_OFFSET:        536 [pixels]
  Y_OFFSET:        556 [pixels]
  X_MAX:           1495 [pixels]
  Y_MAX:           1515 [pixels]
  DET_THRESH:      10
  PHOTO_THRESH:    5
  SL_URL:          sw00357512000msufc0053.fits
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 35"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.11d {+01h 40m 26s}  +16.13d {+16d 07' 37"}
  MOON_DIST:       105.97 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:12:12 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     357512,   Seg_Num: 0
  GRB_RA:          251.3405d {+16h 45m 21.7s} (J2000),
                   251.4127d {+16h 45m 39.0s} (current),
                   250.9624d {+16h 43m 50.9s} (1950)
  GRB_DEC:         +44.8377d {+44d 50' 15.7"} (J2000),
                   +44.8207d {+44d 49' 14.6"} (current),
                   +44.9276d {+44d 55' 39.5"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       119 [cnts]
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75840.88 SOD {21:04:00.88} UT,   46.2 [sec] since BAT Trigger Time
  CENTROID_X:      280.01,  raw= 280  [pixels]
  CENTROID_Y:      284.77,  raw= 285  [pixels]
  ROLL:            318.49 [deg]
  GAIN:            2
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   -31.16
  GRB_POS_XRT_Z:   -52.54
  IMAGE_URL:       sw00357512000msxps_rw.img
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 36"}
  SUN_DIST:        102.62 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.10d {+01h 40m 25s}  +16.12d {+16d 07' 29"}
  MOON_DIST:       105.96 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.11, 40.65 [deg] galactic lon,lat of the burst
  ECL_COORDS:      235.97, 66.09 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:13:23 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.345d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.821d {+44d 49' 15"} (J2000)
  POINT_ROLL:      318.491d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75848.08 SOD {21:04:08.08} UT,   53.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.375
  N_STARS:         56
  X_OFFSET:        536 [pixels]
  Y_OFFSET:        556 [pixels]
  X_MAX:           1495 [pixels]
  Y_MAX:           1515 [pixels]
  DET_THRESH:      10
  PHOTO_THRESH:    5
  SL_URL:          sw00357512000msufc0053.fits
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 35"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.11d {+01h 40m 27s}  +16.13d {+16d 07' 43"}
  MOON_DIST:       105.97 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:14:14 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.345d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.821d {+44d 49' 15"} (J2000)
  ROLL:            318.491d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75848.08 SOD {21:04:08.08} UT,   53.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     269384653
  X_OFFSET:        937 [pixels]
  Y_OFFSET:        876 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1097
  Y_GRB_POS:       1036
  BINNING_INDEX:   1
  IM_URL:          sw00357512000msuni0058.fits
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 35"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.12d {+01h 40m 29s}  +16.13d {+16d 07' 53"}
  MOON_DIST:       105.97 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:14:42 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.345d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.821d {+44d 49' 15"} (J2000)
  ROLL:            318.491d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75848.08 SOD {21:04:08.08} UT,   53.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     269384653
  X_OFFSET:        937 [pixels]
  Y_OFFSET:        876 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1097
  Y_GRB_POS:       1036
  BINNING_INDEX:   1
  IM_URL:          sw00357512000msuni0058.fits
  SUN_POSTN:       115.36d {+07h 41m 25s}  +21.39d {+21d 23' 35"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.13d {+01h 40m 30s}  +16.13d {+16d 07' 59"}
  MOON_DIST:       105.97 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:14:23 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     357512,   Seg_Num: 0
  GRB_RA:          251.344d {+16h 45m 23s} (J2000),
                   251.416d {+16h 45m 40s} (current),
                   250.966d {+16h 43m 52s} (1950)
  GRB_DEC:         +44.827d {+44d 49' 36"} (J2000),
                   +44.810d {+44d 48' 35"} (current),
                   +44.917d {+44d 54' 60"} (1950)
  GRB_DATE:        15027 TJD;   196 DOY;   09/07/15
  GRB_TIME:        75794.63 SOD {21:03:14.63} UT
  TRIGGER_INDEX:   146
  GRB_PHI:         -66.34 [deg]
  GRB_THETA:         5.29 [deg]
  DELTA_TIME:      45.00 [sec]
  TRIGGER_DUR:     1.024 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     24.95 [sigma]
  IMAGE_SIGNIF:    11.48 [sigma]
  LC_URL:          sw00357512000msb.lc
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 35"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.12d {+01h 40m 29s}  +16.13d {+16d 07' 55"}
  MOON_DIST:       105.97 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.10, 40.65 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      235.98, 66.08 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  COMMENTS:        This trigger occurred at longitude,latitude = 18.96,-20.43 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:12:54 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.345d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.821d {+44d 49' 15"} (J2000)
  POINT_ROLL:      318.491d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  75848.08 SOD {21:04:08.08} UT,   53.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.375
  N_STARS:         56
  X_OFFSET:        536 [pixels]
  Y_OFFSET:        556 [pixels]
  X_MAX:           1495 [pixels]
  Y_MAX:           1515 [pixels]
  DET_THRESH:      10
  PHOTO_THRESH:    5
  SL_URL:          sw00357512000msufc0053.fits
  SUN_POSTN:       115.35d {+07h 41m 25s}  +21.39d {+21d 23' 35"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.11d {+01h 40m 26s}  +16.13d {+16d 07' 37"}
  MOON_DIST:       105.97 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:18:00 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.346d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.819d {+44d 49' 07"} (J2000)
  POINT_ROLL:      318.493d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  76060.56 SOD {21:07:40.56} UT,   265.9 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.347
  N_STARS:         27
  X_OFFSET:        617 [pixels]
  Y_OFFSET:        556 [pixels]
  X_MAX:           1576 [pixels]
  Y_MAX:           1515 [pixels]
  DET_THRESH:      6
  PHOTO_THRESH:    2
  SL_URL:          sw00357512000msufc0265.fits
  SUN_POSTN:       115.36d {+07h 41m 26s}  +21.39d {+21d 23' 33"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.16d {+01h 40m 37s}  +16.14d {+16d 08' 38"}
  MOON_DIST:       105.98 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:18:00 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.346d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.819d {+44d 49' 07"} (J2000)
  POINT_ROLL:      318.493d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  76060.56 SOD {21:07:40.56} UT,   265.9 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.347
  N_STARS:         27
  X_OFFSET:        617 [pixels]
  Y_OFFSET:        556 [pixels]
  X_MAX:           1576 [pixels]
  Y_MAX:           1515 [pixels]
  DET_THRESH:      6
  PHOTO_THRESH:    2
  SL_URL:          sw00357512000msufc0265.fits
  SUN_POSTN:       115.36d {+07h 41m 26s}  +21.39d {+21d 23' 33"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.16d {+01h 40m 37s}  +16.14d {+16d 08' 38"}
  MOON_DIST:       105.98 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:18:27 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.346d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.819d {+44d 49' 07"} (J2000)
  POINT_ROLL:      318.493d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  76060.56 SOD {21:07:40.56} UT,   265.9 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.347
  N_STARS:         27
  X_OFFSET:        617 [pixels]
  Y_OFFSET:        556 [pixels]
  X_MAX:           1576 [pixels]
  Y_MAX:           1515 [pixels]
  DET_THRESH:      6
  PHOTO_THRESH:    2
  SL_URL:          sw00357512000msufc0265.fits
  SUN_POSTN:       115.36d {+07h 41m 26s}  +21.39d {+21d 23' 33"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.16d {+01h 40m 38s}  +16.15d {+16d 08' 44"}
  MOON_DIST:       105.98 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:19:06 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.346d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.819d {+44d 49' 07"} (J2000)
  ROLL:            318.493d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  76060.56 SOD {21:07:40.56} UT,   265.9 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     269384865
  X_OFFSET:        937 [pixels]
  Y_OFFSET:        876 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1097
  Y_GRB_POS:       1036
  BINNING_INDEX:   1
  IM_URL:          sw00357512000msuni0270.fits
  SUN_POSTN:       115.36d {+07h 41m 26s}  +21.39d {+21d 23' 33"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.16d {+01h 40m 40s}  +16.15d {+16d 08' 52"}
  MOON_DIST:       105.98 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Image.  
  COMMENTS:        The GRB Position came from the XRT Position Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 15 Jul 09 21:19:23 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     357512,   Seg_Num: 0
  POINT_RA:        251.346d {+16h 45m 23s} (J2000)
  POINT_DEC:       +44.819d {+44d 49' 07"} (J2000)
  ROLL:            318.493d
  IMG_START_DATE:  15027 TJD;   196 DOY;   09/07/15
  IMG_START_TIME:  76060.56 SOD {21:07:40.56} UT,   265.9 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     269384865
  X_OFFSET:        937 [pixels]
  Y_OFFSET:        876 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1097
  Y_GRB_POS:       1036
  BINNING_INDEX:   1
  IM_URL:          sw00357512000msuni0270.fits
  SUN_POSTN:       115.36d {+07h 41m 26s}  +21.39d {+21d 23' 33"}
  SUN_DIST:        102.63 [deg]   Sun_angle= -9.1 [hr] (East of Sun)
  MOON_POSTN:       25.17d {+01h 40m 40s}  +16.15d {+16d 08' 55"}
  MOON_DIST:       105.98 [deg]
  MOON_ILLUM:      45 [%]
  GAL_COORDS:       70.09, 40.65 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      235.99, 66.07 [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 #9668
  L. Vetere (PSU), A. P. Beardmore (U Leicester), N. Gehrels (NASA/GSFC), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), F. E. Marshall (NASA/GSFC), P. T. O'Brien (U Leicester), J. P. Osborne (U Leicester), C. Pagani (PSU), J. L. Racusin (PSU), B. Sbarufatti (INAF-IASFPA), M. H. Siegel (PSU), M. Stamatikos (NASA/ORAU) and M. A. Stark (PSU) report on behalf of the Swift Team:
  At 21:03:14 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 090715B (trigger=357512). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 251.344, +44.827 which is

     RA(J2000) = 16h 45m 23s
     Dec(J2000) = +44d 49' 36"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a multi-peaked structure with a duration of about 100 sec. The peak count rate was ~8000 counts/sec (15-350 keV), at ~6 sec after the trigger.
  The XRT began observing the field at 21:04:00.9 UT, 46.2 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 251.3405, +44.8377 which is equivalent to:

     RA(J2000)  = 16h 45m 21.71s
     Dec(J2000) = +44d 50' 15.7"
  

  with an uncertainty of 4.9 arcseconds (radius, 90% containment). This location is 39 arcseconds from the BAT onboard position, within the BAT error circle. No event data are yet available to determine the column density using X-ray spectroscopy.
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 53 seconds after the BAT trigger. There is a weak source in 2.7'x2.7' sub-image near the edge of the XRT error circle at the position of

    RA(J2000) = 16:45:21.62
    Dec(J2000) = +44:50:21.3
  

  The estimated white magnitude 20.5 with an estimated error of 0.5 mag. No correction has been made for the expected extinction corresponding to E(B-V) of 0.01.
  Swift autonomous slewing to new GRBs was enabled just prior to this burst. It was disabled previously due to an anomaly with the on-board solid state recorder. That problem is now resolved.
  Burst Advocate for this burst is L. Vetere (vetere AT astro.psu.edu). 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 #9670
  R.J. Smith, C.G. Mundell, A. Melandri, I.A. Steele, S. Kobayashi, C.J. Mottram, D.F. Bersier, Z. Cano (Liverpool JMU), A. Gomboc (Ljubljana), C. Guidorzi (INAF-OAB) report:
  "The 2-m Liverpool Telescope robotically followed up GRB090715 (SWIFT trigger 357512; Vetere et al. GCN 9668) beginning 11.07 min after the GRB trigger time.
  An uncatalogued course is detected at:
  16 45 21.67 +44 50 21 (J2000) (positional uncertainty +/-1")
  with magnitude r' = 19.6 +/- 0.2 mag (wrt SDSS) at T=11.53 min.
  Observations and analysis are ongoing.
  This message may be cited"
• GCN Circular #9671
  D. Malesani (DARK/NBI), T. Augusteijn (NOT), C. Mackay, D. King, T. Staley (IoA Cambridge), A. De Cia and P. Jakobsson (Univ. Iceland) report on behalf of a larger collaboration:
  We observed the field of GRB 090715B (Vetere et al., GCN 9668) with the NOT equipped with StanCam, in the V, R, and I filters.
  In a single 180 s exposure starting on 2009 July 16.040 UT (3.91 hr after the GRB), we clearly detect the object reported by Vetere et al. (GCN 9668) and Smith et al. (GCN 9670) with a magnitude R = 19.92 +- 0.03 (assuming R = 17.16 for the USNO star at 16:45:24.24, +44:50:57.3). Although our measurement indicates only moderate fading when compared to the value by Smith et al. (GCN 9670), the object is missing from the SDSS frames of this field, and is thus very likely the afterglow of GRB 090715B.
• GCN Circular #9672
  J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU), L. Vetere (PSU) (i.e. the Swift-BAT team):
  Using the data set from T-240 to T+962 sec from recent telemetry downlinks, we report further analysis of BAT GRB 090715 (trigger #357512) (Vetere, et al., GCN Circ. 9668). The BAT ground-calculated position is RA, Dec = 251.337, 44.837 deg, which is

     RA(J2000)  =  16h 45m 20.9s 
     Dec(J2000) = +44d 50' 12.6" 
  

  with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
  The mask-weighted light curve shows a series of peaks. The first starts at ~T-10 sec, peaks at ~T+7 sec, and returns almost to background at T+35 sec. The second peak start at ~T+45 sec and ends at ~T+100 sec. The third peak starts at ~T+230 sec and ends at ~T+290 sec. T90 (15-350 keV) is 266 +- 11 sec (estimated error including systematics).
  The time-averaged spectrum from T-11.6 to T+292.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.57 +- 0.07. The fluence in the 15-150 keV band is 5.7 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+6.46 sec in the 15-150 keV band is 3.8 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
  The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/357512/BA/
• GCN Circular #9673
  K. Wiersema (Leicester), A. Levan (Warwick), A. Kamble (Amsterdam), N. Tanvir (Leicester) and D. Malesani (DARK/NBI) report on behalf of a larger collaboration:
  We observed the afterglow of GRB090715B (Vetere et al, GCN 9668; Smith et al GCN9 670) with the William Herschel Telescope, using the ISIS spectrograph. Exposure times were 3 x 900 seconds with the R300B and R316R grisms in the blue and red arm respectively, starting at 23:46 UT. We detect a multitude of lines, including Lyman alpha, Lyman beta, SiII and SII at redshift z=3.00.
  We thank T. Ottosen for acquiring this dataset.
• GCN Circular #9674
  L. Vetere (PSU) reports on behalf of the Swift-XRT team:
  We have analysed ~2 ks of XRT data for GRB 090715B (Vetere et al. GCN Circ. 9668), from 52 s to 10.2 ks after the BAT trigger. The data comprise 471 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The refined XRT position for this burst is Ra, Dec 251.340 44.838 which is:

      RA(J2000) = 16h 45m 21.7s
      Dec(J2000) = +44d 50' 18.1"
  

  The light curve shows multiple peaks in WT and a power-law decay in PC with a decay index of alpha=1.1(+/-0.2).
  A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.84 (+/-0.02). The best-fitting absorption column is 1.09 (+/-0.02) x 10^21 cm^-2, in excess of the Galactic value of 1.3 x 10^20 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.3 (+/-0.3) and a best-fitting absorption column of 1.4 (+/-0.1) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.8 x 10^-11 (5.8 x 10^-11) erg cm^-2 count^-1.
  If the light curve continues to decay with a power-law decay index of 1.1, the count rate at T+24 hours will be 0.02 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.6 x 10^-13 (1.2 x 10^-12) erg cm^-2 s^-1.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #9675
  L. A. Antonelli (INAF-OAR), S. Marinoni (INAF-TNG), F. Montalvo (UNAM- OAN), A. Vazquez (UNAM-IA) report:
  We observed the field of GRB 090715B (Vetere et al., GCN 9668) with the 1.5 m Telescope in San Pedro Martir (BCN-Mexico) equipped with LaRuca, in the B, V, and R filters.
  We started observations on 2009 July 16.1729 UT (7.07 hrs after the burst) and we detect the object reported by Malesani et al., (GCN 9671), Smith et al. (GCN 9670) and Vetere et al. (GCN 9668) in all filters. The object has a magnitude R = 20.4 +- 0.1 (calibrated against USNO B1). The object has faded with respect of the value reported by Malesani et al., (GCN 9671) with a decay index of 0.77 +-0.39. Due to its fading behavior we can confirm that it is the optical afterglow of GRB 090715B.
  This message can be cited.
• GCN Circular #9676
  A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
  Using 2329 s of XRT Photon Counting mode data and 5 UVOT images for GRB 090715B, 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 = 251.33969, +44.83889 which is equivalent to:

  RA (J2000): 16h 45m 21.53s
  Dec (J2000): +44d 50' 20.0"
  

  with an uncertainty of 1.5 arcsec (radius, 90% confidence).
  This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, arXiv:0812.3662).
  This circular was automatically generated, and is an official product of the Swift-XRT team.
• GCN Circular #9677
  C. Guidorzi (U. Ferrara), Z. Cano, A. Melandri, C.G. Mundell, R.J. Smith, I.A. Steele, D. Bersier, S. Kobayashi (Liverpool JMU), A. Gomboc (U. Ljubljana) on behalf of a large collaboration report:
  We began observing the Swift GRB 090715B (Vetere et al. GCN Circ. 9668) with the Liverpool Telescope (LT) on July 15, 21:14:19 UT (11.0 min post BAT trigger) with the SDSS riz filters, confirming the detection of the optical afterglow seen by Swift-UVOT (Smith et al. GCN Circ. 9670; Malesani et al GCN Circ. 9671; Antonelli et al. GCN Circ. 9675). Observations with the LT carried on until 5.6 hours post burst. Our measurements are in agreement with the value reported by Malesani et al. (GCN Circ. 9671) after correcting for the different calibration.
  We also observed the OT with the Faulkes Telescope North (FTN) from July 16, 09:45:46 UT (i.e., at 12.71 hours) with the R filter.
  The light curve in the r filter from 0.18 to 12.7 hours can be fitted with a broken power-law with alpha1=0.25 +/- 0.02, t_break =18 (-3, +12) ks, alpha2~0.7.

  Telescope   Mid Time   Exposure  Filter   Mag
              (hours)     (s)
  ------------------------------------------------------
  FTN         12.90      1200        R     20.98 +- 0.05
  ------------------------------------------------------
  

  Calibration was performed against the SDSS star mentioned by Malesani et al. (GCN 9671), assuming r'=17.74 and R=17.54.
• GCN Circular #9678
  A. Breeveld (MSSL/UCL) and L. Vetere (PSU) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 090715B 53 s after the BAT trigger (Vetere et al., GCN Circ. 9668). The optical afterglow reported in Vetere et al., GCN 9668 and confirmed by Smith et al., GCN 9670, Malesani et al., GCN 9671, Wiersema et al., GCN 9673 and Antonelli et al., GCN 9675 is detected by the UVOT only in the initial white exposure. The detected magnitude and preliminary 3-sigma upper limits obtained using a 3" aperture and the UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for the first finding chart (FC) exposure and subsequent summed exposures are:

  Filter         T_start(s)   T_stop(s)      Exp(s)         Mag
  
  white_FC         53            203          147         20.37 +/- 0.15
  white            4052         4252          196         >21.3
  v                    5989       22687          795         >21.0
  b                    3848         4047          197         >20.3
  u                      266       16495          428         >21.2
  w1              12053       16278          894         >21.2
  m2                6195       10367          826         >21.0
  w2                4258       22065          995         >21.4
  

  The values quoted above are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.01 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #9679
  S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin, P. Oleynik, M. Ulanov, and D. Svinkin on behalf of the Konus-Wind and Konus-RF teams, and T. Cline on behalf of the Konus-Wind team, report:
  The long GRB 090715B (Vetere et al., GCN 9668) triggered Konus-Wind at T0=75799.008 s UT (21:03:19.008), and Konus-RF instrument onboard CORONAS-PHOTON s/c at T0(KRF)=75798.895 s UT (21:03:18.895).
  The burst had a multi-peaked structure with a duration of ~100 s. The Konus-Wind light curves of this GRB are available at http://www.ioffe.ru/LEA/GRBs/GRB090715_T75799/
  As observed by Konus-Wind, the burst had a fluence of 9.3(-1.1,+1.5)x10-6 erg/cm2, and a 256-ms peak flux, measured from T0+4.912 s, of 9.0(-2.5,+2.5)x10-7 erg/cm2/s (both in the 20 keV - 2 MeV energy range).
  The time-integrated spectrum of the burst (from T0 to T0+82.176 s) is well fitted (in the 20 keV - 2 MeV range) by a power-law with exponential cutoff (CPL) model: dN/dE ~ E^{alpha}*exp(-(2+alpha)*E/Epeak), for which: the photon index alpha = -1.1(-0.34,+0.4), and the peak energy Ep = 134(-30,+56) keV (chi2 = 57/61 dof).
  The spectrum at the maximum count rate, measured from T0 to T0+8.448 s, is also well fitted (in the 20 keV - 2 MeV range) by CPL model, for which: the photon index alpha = -0.86(-0.20,+0.22), and the peak energy Ep = 178(-23,+33) keV (chi2 = 49/61 dof).
  All the quoted values are preliminary. The quoted errors are at the 90% confidence level.
• GCN Circular #9681
  D.Kuvshinov, V. Lipunov, V.Kornilov, E. Gorbovskoy, A.Belinski, A. Krylov, N.Shatskiy, N.Tyurina, P.Balanutsa, V.V.Chazov, P.V.Kortunov Sternberg Astronomical Institute, Moscow State University
  A. Tlatov, A.V. Parkhomenko, Kislovodsk Solar Station of the Pulkovo Observatory
  V.Krushinski, I.Zalognikh, T.Kopytova, Alexander Popov Ural State University, Kourovka
  S.Yazev, K.Ivanov Irkutsk State University
  MASTER robotic telescope (MASTER-Net: http://observ.pereplet.ru, 355 mm, 6 square degrees, 16Mpx Apogee CCD) located at Vostrykovo (Moscow) responded to the GRB 090715B (Swift trigger 357512, L. Vetere , GCN 9668), producing images beginning 19 s after the GCN notice time. An automated response took the first image at 21:11:18 UT, 8m 04s after the burst, under summer Moscow sky. We have 160 images with 30 sec exposition each. These unfiltered images are calibrated relative to USNO 08.R+0.2B (Usno A2.0).
  Individual images have limiting magnitudes ranging from 17.8-17.0; we set the following specific limits.

  GRB_time     start UT       end UT      t_exp(s)   mlim     Coadd?
  -------------------------------------------------------------------
  
  484 - 514s    21:11:18      21:41:18        30      17.8       no
  484 - 699s    21:11:18      21:14:57        90      18.5        3 
  484 - 6699S   21:11:18      22:54:27      3330      20.0       111
  

  Robot do not detect OT with limit 20.0 .
  The message may be cited.
  mailto: lipunov@sai.msu.ru
• GCN Circular #9684
  D. A. Perley, J. Choi, A. Morton and M. Ganeshalingam (UC Berkeley) report:
  We obtained a series of R-band exposures of the optical transient associated with GRB 090715B (GCN 9668, Vetere et al.; GCN 9670, Smith et al.) at the 1-meter Nickel telescope at Lick Observatory under clear skies and good seeing. The transient is detected in individual frames. We report the following magnitudes relative to the calibration star of Malesani et al. (GCN 9671):

  t_start(UT)  exp(s)        mag                  t-t0(hr)
  06:17:06.10   120    R = 20.23 +/- 0.21           9.23
  06:27:36.17   200    R = 20.27 +/- 0.16           9.41
  06:31:53.21   200    R = 20.06 +/- 0.14           9.48
  06:42:53.80   300    R = 20.48 +/- 0.17           9.66
  06:54:57.78   300    R = 20.40 +/- 0.16           9.86
  07:01:01.97   300    R = 20.39 +/- 0.20           9.96
  07:07:07.30   300    R = 20.24 +/- 0.14           10.07
  07:19:01.36   300    R = 20.47 +/- 0.18           10.26
  07:32:15.82   300    R = 20.71 +/- 0.23           10.44
  

  A stack of all images gives an average magnitude of R = 20.23 +/- 0.07.
• GCN Circular #9687
  D. Malesani (DARK/NBI), G. C. Cox (NOT), C. Mackay, D. King, T. Staley (IoA Cambridge), and P. Jakobsson (Univ. Iceland) report on behalf of a larger collaboration:
  We observed again the field of GRB 090715B (Vetere et al., GCN 9668) using the NOT telescope equipped with the StanCam instrument. The optical afterglow (Vetere et al., GCN 9668; Smith et al., GCN 9670) is well detected in the V and R filters, and is still bright. Using the same reference star as in GCN 9671, we measure R ~ 21.3 on mean time July 17.94 UT (2.06 days after the GRB).
  Assuming an unbroken power-law fading (Fnu propto t^-alpha), the corresponding decay index is alpha ~ 0.44, which is unusually flat at

  such late epoch (although not unprecedented). Our measurement is also 
  consistent within the uncertainties with the broken power-law fit 
  

  reported by Guidorzi et al. (GCN 9677).
  DM thanks Carole G. Mundell and Cristiano Guidorzi for discussion.
• GCN Circular #9695
  Poonam Chandra (RMC) and Dale A. Frail (NRAO) report on behalf of a larger collaboration:
  "We used the Very Large Array (VLA) to observe the field of view towards the GRB 090715B (GCN 9668) at a frequency of 8.46 GHz on 2009 Jul. 20.14 UT. We clearly detect the GRB afterglow at the Swift UVOT afterglow position (GCN 9668). The peak flux at the GRB afterglow position is 231+/-47 uJy.
  The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc."
• GCN Circular #9720
  D. A. Perley, N. R. Butler, and S. B. Cenko (UC Berkeley) report:
  We obtained additional, late-time imaging of the field of GRB 090715B (GCN 9668, Vetere et al.; GCN 9670, Smith et al.) with the Lick 3m telescope (+PFCam) in the R-band filter under dark skies, good seeing conditions and thin cloud cover. Observations were conducted on the night of 2009-07-24 (UT) between 04:46 and 06:15 UT, and consisted of seven 300-second exposures followed by four 600-second exposures.
  The afterglow is faintly detected in the combined image. Photometry relative to the reference star of Malesani et al. (GCN 9671) gives a magnitude of R = 23.6 +/- 0.3 mag at this time (t = 8.35 days after the GRB).
  Relative to the NOT observation at 2.06 days (Malesani et al., GCN 9687), this corresponds to a decay index of alpha ~ 1.5, indicating that the unusually long period of slow fading has ended and the optical afterglow has resumed a "normal" power-law decay.
• GCN Report 236.1
  GCN_Report 236.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_236_1.pdf by L. Vetere at PSU titled: "Final Results on Swift GRB 090715B"
• GCN Circular #9927
  J. Haislip, D. Reichart, K. Ivarsen, A. LaCluyze, A. Foster, J. Moore, A. Oza, M. Schubel, J. Styblova, A. Trotter, J. A. Crain, and M. Nysewander report:
  Skynet observed the Swift/BAT localization of GRB 090715B (Vetere et al., GCN 9668) with three of the 16" PROMPT telescopes at CTIO beginning 3.1 hours after the trigger in UBRI.
  We detect the afterglow (Vetere et al., GCN 9668). Stacking only images that increase the limiting magnitude yields:

  mean                                                          1-sig. 
  1-sig.
  time                                                          sys.    stat.
  since                                              cal.       cal.    cal.
  trig.  tel.      exp.     fil.  magnitude          stars*     unc.    unc.
  (h)              (# x s)                                      (mag)   (mag)
  
  3.4    PROMPT-3  12 x 80  U     > 17.5 (3 sig.)    10 SDSS 7  0.094   0.001
  3.8    PROMPT-5  40 x 80  I     19.80 +0.40 -0.29  93 SDSS 7  0.268   0.000
  3.8    PROMPT-4  41 x 80  R     20.31 +0.20 -0.17  78 SDSS 7  0.151   0.000
  4.0    PROMPT-3  29 x 80  B     > 20.8 (3 sig.)    37 SDSS 7  0.134   0.000
  

  * Transformed using Jester et al., 2005, ApJ, 130, 873.