Gamma-ray Burst 091130B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 17:59:29 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     377487,   Seg_Num: 0
  GRB_RA:          203.098d {+13h 32m 24s} (J2000),
                   203.211d {+13h 32m 51s} (current),
                   202.531d {+13h 30m 07s} (1950)
  GRB_DEC:         +34.075d {+34d 04' 31"} (J2000),
                   +34.025d {+34d 01' 28"} (current),
                   +34.332d {+34d 19' 55"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       4342 [cnts]    Image_Peak=196 [image_cnts]
  TRIGGER_DUR:     1.024 [sec] 
  TRIGGER_INDEX:   146     E_range: 25-100 keV
  BKG_INTEN:       26976 [cnts]
  BKG_TIME:        64730.69 SOD {17:58:50.69} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        15165 TJD;   334 DOY;   09/11/30
  GRB_TIME:        64744.77 SOD {17:59:04.77} UT
  GRB_PHI:           7.36 [deg]
  GRB_THETA:        28.70 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     14.28 [sigma]
  IMAGE_SIGNIF:    7.78 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +0  +2  -2  +0  +0 -34  +0 
  SUN_POSTN:       246.94d {+16h 27m 46s}  -21.75d {-21d 44' 44"}
  SUN_DIST:         69.58 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.01d {+02h 56m 04s}  +21.60d {+21d 35' 55"}
  MOON_DIST:       120.96 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.70, 78.79 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      185.64, 40.04 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  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 = 298.97,12.92 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:00:57 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     377487,   Seg_Num: 0
  GRB_RA:          203.1487d {+13h 32m 35.68s} (J2000),
                   203.2610d {+13h 33m 02.64s} (current),
                   202.5817d {+13h 30m 19.61s} (1950)
  GRB_DEC:         +34.0883d {+34d 05' 17.8"} (J2000),
                   +34.0376d {+34d 02' 15.2"} (current),
                   +34.3448d {+34d 20' 41.3"} (1950)
  GRB_ERROR:       4.8 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       5.45e-09 [erg/cm2/sec]
  GRB_SIGNIF:      12.92 [sigma]
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64830.19 SOD {18:00:30.19} UT,   85.4 [sec] since BAT Trigger Time
  TAM[0-3]:        327.66 237.23 261.36 243.66
  AMPLIFIER:       2
  WAVEFORM:        134
  SUN_POSTN:       246.94d {+16h 27m 46s}  -21.75d {-21d 44' 44"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.03d {+02h 56m 07s}  +21.60d {+21d 36' 08"}
  MOON_DIST:       120.95 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.63, 78.75 [deg] galactic lon,lat of the burst
  ECL_COORDS:      185.68, 40.07 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        The XRT position is 2.62 arcmin from the BAT position.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:01:07 UT
  NOTICE_TYPE:     Swift-XRT Image
  TRIGGER_NUM:     377487,   Seg_Num: 0
  GRB_RA:          203.1487d {+13h 32m 35.6s} (J2000),
                   203.2610d {+13h 33m 02.6s} (current),
                   202.5817d {+13h 30m 19.6s} (1950)
  GRB_DEC:         +34.0883d {+34d 05' 17.8"} (J2000),
                   +34.0376d {+34d 02' 15.2"} (current),
                   +34.3448d {+34d 20' 41.3"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       167 [cnts]
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64830.19 SOD {18:00:30.19} UT,   85.4 [sec] since BAT Trigger Time
  CENTROID_X:      304.90,  raw= 305  [pixels]
  CENTROID_Y:      375.50,  raw= 376  [pixels]
  ROLL:            136.71 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   182.71
  GRB_POS_XRT_Z:   6.15
  IMAGE_URL:       sw00377487000msxps_rw.img
  SUN_POSTN:       246.94d {+16h 27m 46s}  -21.75d {-21d 44' 44"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.03d {+02h 56m 07s}  +21.60d {+21d 36' 09"}
  MOON_DIST:       120.95 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.63, 78.75 [deg] galactic lon,lat of the burst
  ECL_COORDS:      185.68, 40.07 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:01:15 UT
  NOTICE_TYPE:     Swift-XRT Processed Image
  TRIGGER_NUM:     377487,   Seg_Num: 0
  GRB_RA:          203.1487d {+13h 32m 35.6s} (J2000),
                   203.2610d {+13h 33m 02.6s} (current),
                   202.5817d {+13h 30m 19.6s} (1950)
  GRB_DEC:         +34.0883d {+34d 05' 17.8"} (J2000),
                   +34.0376d {+34d 02' 15.2"} (current),
                   +34.3448d {+34d 20' 41.3"} (1950)
  GRB_ERROR:       4.7 [arcsec, radius, statistical plus systematic]
  GRB_INTEN:       167 [cnts]
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64830.19 SOD {18:00:30.19} UT,   85.4 [sec] since BAT Trigger Time
  CENTROID_X:      304.90,  raw= 305  [pixels]
  CENTROID_Y:      375.50,  raw= 376  [pixels]
  ROLL:            136.71 [deg]
  GAIN:            1
  MODE:            3, Long Image mode
  WAVEFORM:        134
  EXPO_TIME:       2.50 [sec]
  GRB_POS_XRT_Y:   182.71
  GRB_POS_XRT_Z:   6.15
  IMAGE_URL:       sw00377487000msxps_rw.img
  SUN_POSTN:       246.94d {+16h 27m 46s}  -21.75d {-21d 44' 44"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.03d {+02h 56m 08s}  +21.60d {+21d 36' 10"}
  MOON_DIST:       120.95 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.63, 78.75 [deg] galactic lon,lat of the burst
  ECL_COORDS:      185.68, 40.07 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Processed Image.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:02:45 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     377487,   Seg_Num: 0
  GRB_RA:          203.098d {+13h 32m 24s} (J2000),
                   203.211d {+13h 32m 51s} (current),
                   202.531d {+13h 30m 07s} (1950)
  GRB_DEC:         +34.075d {+34d 04' 31"} (J2000),
                   +34.025d {+34d 01' 28"} (current),
                   +34.332d {+34d 19' 55"} (1950)
  GRB_DATE:        15165 TJD;   334 DOY;   09/11/30
  GRB_TIME:        64744.77 SOD {17:59:04.77} UT
  TRIGGER_INDEX:   146
  GRB_PHI:           7.36 [deg]
  GRB_THETA:        28.70 [deg]
  DELTA_TIME:      32.00 [sec]
  TRIGGER_DUR:     1.024 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     14.28 [sigma]
  IMAGE_SIGNIF:    7.78 [sigma]
  LC_URL:          sw00377487000msb.lc
  SUN_POSTN:       246.94d {+16h 27m 46s}  -21.75d {-21d 44' 45"}
  SUN_DIST:         69.58 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.05d {+02h 56m 11s}  +21.61d {+21d 36' 23"}
  MOON_DIST:       120.94 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.70, 78.79 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      185.64, 40.04 [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 = 298.97,12.92 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:04:34 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     377487,   Seg_Num: 0
  POINT_RA:        203.105d {+13h 32m 25s} (J2000)
  POINT_DEC:       +34.052d {+34d 03' 08"} (J2000)
  POINT_ROLL:      136.704d
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64839.66 SOD {18:00:39.66} UT,   94.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.784
  N_STARS:         8
  X_OFFSET:        304 [pixels]
  Y_OFFSET:        560 [pixels]
  X_MAX:           1263 [pixels]
  Y_MAX:           1519 [pixels]
  DET_THRESH:      20
  PHOTO_THRESH:    12
  SL_URL:          sw00377487000msufc0094.fits
  SUN_POSTN:       246.94d {+16h 27m 47s}  -21.75d {-21d 44' 46"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.07d {+02h 56m 16s}  +21.61d {+21d 36' 39"}
  MOON_DIST:       120.95 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.59, 78.80 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      185.66, 40.02 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:05:06 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     377487,   Seg_Num: 0
  POINT_RA:        203.105d {+13h 32m 25s} (J2000)
  POINT_DEC:       +34.052d {+34d 03' 08"} (J2000)
  POINT_ROLL:      136.704d
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64839.66 SOD {18:00:39.66} UT,   94.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.784
  N_STARS:         8
  X_OFFSET:        304 [pixels]
  Y_OFFSET:        560 [pixels]
  X_MAX:           1263 [pixels]
  Y_MAX:           1519 [pixels]
  DET_THRESH:      20
  PHOTO_THRESH:    12
  SL_URL:          sw00377487000msufc0094.fits
  SUN_POSTN:       246.94d {+16h 27m 47s}  -21.75d {-21d 44' 46"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.07d {+02h 56m 17s}  +21.61d {+21d 36' 44"}
  MOON_DIST:       120.95 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.59, 78.80 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      185.66, 40.02 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Source List.  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:04:34 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     377487,   Seg_Num: 0
  POINT_RA:        203.105d {+13h 32m 25s} (J2000)
  POINT_DEC:       +34.052d {+34d 03' 08"} (J2000)
  POINT_ROLL:      136.704d
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64839.66 SOD {18:00:39.66} UT,   94.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        5.784
  N_STARS:         8
  X_OFFSET:        304 [pixels]
  Y_OFFSET:        560 [pixels]
  X_MAX:           1263 [pixels]
  Y_MAX:           1519 [pixels]
  DET_THRESH:      20
  PHOTO_THRESH:    12
  SL_URL:          sw00377487000msufc0094.fits
  SUN_POSTN:       246.94d {+16h 27m 47s}  -21.75d {-21d 44' 46"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.07d {+02h 56m 16s}  +21.61d {+21d 36' 39"}
  MOON_DIST:       120.95 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.59, 78.80 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      185.66, 40.02 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Mon 30 Nov 09 18:06:06 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     377487,   Seg_Num: 0
  POINT_RA:        203.105d {+13h 32m 25s} (J2000)
  POINT_DEC:       +34.052d {+34d 03' 08"} (J2000)
  ROLL:            136.704d
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64839.66 SOD {18:00:39.66} UT,   94.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     281296844
  X_OFFSET:        609 [pixels]
  Y_OFFSET:        569 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       769
  Y_GRB_POS:       729
  BINNING_INDEX:   1
  IM_URL:          sw00377487000msuni0100.fits
  SUN_POSTN:       246.95d {+16h 27m 47s}  -21.75d {-21d 44' 46"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.08d {+02h 56m 19s}  +21.61d {+21d 36' 53"}
  MOON_DIST:       120.94 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.59, 78.80 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      185.66, 40.02 [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:     Mon 30 Nov 09 18:06:33 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     377487,   Seg_Num: 0
  POINT_RA:        203.105d {+13h 32m 25s} (J2000)
  POINT_DEC:       +34.052d {+34d 03' 08"} (J2000)
  ROLL:            136.704d
  IMG_START_DATE:  15165 TJD;   334 DOY;   09/11/30
  IMG_START_TIME:  64839.66 SOD {18:00:39.66} UT,   94.9 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     281296844
  X_OFFSET:        609 [pixels]
  Y_OFFSET:        569 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       769
  Y_GRB_POS:       729
  BINNING_INDEX:   1
  IM_URL:          sw00377487000msuni0100.fits
  SUN_POSTN:       246.95d {+16h 27m 47s}  -21.75d {-21d 44' 46"}
  SUN_DIST:         69.56 [deg]   Sun_angle= 2.9 [hr] (West of Sun)
  MOON_POSTN:       44.09d {+02h 56m 21s}  +21.62d {+21d 36' 56"}
  MOON_DIST:       120.94 [deg]
  MOON_ILLUM:      97 [%]
  GAL_COORDS:       73.59, 78.80 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      185.66, 40.02 [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 #10214
  J. L. Racusin (NASA/GSFC), S. D. Barthelmy (GSFC), A. P. Beardmore (U Leicester), J. R. Cummings (NASA/UMBC), P. A. Evans (U Leicester), S. T. Holland (CRESST/USRA/GSFC), E. A. Hoversten (PSU), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), J. Mao (INAF-OAB), R. Margutti (Univ Bicocca&OAB), F. E. Marshall (NASA/GSFC), C. Pagani (PSU), K. L. Page (U Leicester), T. Sakamoto (NASA/UMBC), M. H. Siegel (PSU), E. Troja (NASA/GSFC/ORAU) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team:
  At 17:59:04 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 091130B (trigger=377487). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 203.098, +34.075 which is

     RA(J2000)  =  13h 32m 24s
     Dec(J2000) = +34d 04' 31"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows two, possibly three, peaks with a total duration of about 100 sec. The peak count rate was ~1800 counts/sec (15-350 keV), at ~0 sec after the trigger.
  The XRT began observing the field at 18:00:30.2 UT, 85.4 seconds after the BAT trigger. XRT found a bright, uncatalogued X-ray source located at RA, Dec 203.1487, +34.0883 which is equivalent to:

     RA(J2000)  = 13h 32m 35.68s
     Dec(J2000) = +34d 05' 17.8"
  

  with an uncertainty of 4.8 arcseconds (radius, 90% containment). No event data are yet available to determine the column density using X-ray spectroscopy.
  The initial flux in the 2.5 s image was 5.45e-09 erg cm^-2 s^-1 (0.2-10 keV).
  UVOT took a finding chart exposure of 136 seconds with the White filter starting 94 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. 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 0.01.
  Burst Advocate for this burst is J. L. Racusin (judith.racusin AT nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
• GCN Circular #10215
  A.J. Levan (U. Warwick), N.R. Tanvir (U. Leicester) report:
  "Inspection of SDSS images of GRB 091130B (Racusin et al. GCN 10214) shows a faint galaxy (r=22.5), inside the XRT localization. There is also a brighter galaxy (r=18.9) offset roughly 7" from the XRT position (which has a 4.8" error radius). The detection of these objects suggests that GRB 091130B could be a relatively low redshift event."
• GCN Circular #10216
  S.Sergienko, V.Yurkov Blagoveschensk Educational State University, Blagoveschensk
  E. Gorbovskoy, D. Zimnukhov, V. Lipunov, V.Kornilov, A.Belinski, D.Kuvshinov, N.Shatskiy, N.Tyurina, P.Balanutsa, V.V.Chazov, A.Kuznetsov
  Sternberg Astronomical Institute, Moscow State University
  A. Tlatov, A.V. Parkhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
  V.Krushinski, I.Zalognikh, T.Kopytova, A. Popov Ural State University, Kourovka
  S.Yazev, K.Ivanov, N.M.Budnev, E.Konstantinov, V.Lenok Irkutsk State University
  MASTER robotic telescope (MASTER-Net: http://observ.pereplet.ru, D= 200 mm, FOV= 7 square degrees, 16 Mpx Apogee CCD, testing mode) located at Blagoveschensk was responted to the GRB 091130B (Racusin et al., GCN 10214) 40 sec after Notice time and 65 s after the GRB time. The exposition of the first image is 10s.
  We do not see OT brighter 15 mag at the Swift XRT position.
  The reduction is continued.
  The message may be cited.
  We note that MASTER-Amur-Blagoveschensk are in testing mode now.
  mailto: lipunov@sai.msu.ru
• GCN Circular #10218
  M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
  Using 3970 s of XRT Photon Counting mode data and 7 UVOT images for GRB 091130B, 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 = 203.14844, +34.08839 which is equivalent to:

  RA (J2000): 13h 32m 35.63s
  Dec (J2000): +34d 05' 18.2"
  

  with an uncertainty of 1.6 arcsec (radius, 90% confidence).
  This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
  This circular was automatically generated, and is an official product of the Swift-XRT team.
• GCN Circular #10220
  E. A. Hoversten (PSU) and J. L. Racusin (NASA/GSFC) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 091130B 95s after the BAT trigger (Racusin et al., GCN 10214). We do not detect any source at the enhanced Swift XRT position (Goad et al. GCN 10218). UVOT magnitude 3-sigma upper limits are reported in the following table:

  Filter   T_start   T_stop   Exp(s)  Mag (3-sigma upper limit)
  -------------------------------------------------------------
  white       95       230     132        > 20.20
  white     4517      4717     196        > 20.97
  v         3492      3692     196        > 19.38
  b         4313      4512     196        > 20.31
  u         4107      4307     196        > 19.91
  uvw1      3903      4102     196        > 19.88
  uvm2      3697      3897     196        > 19.76
  uvw2      4723      4923     196        > 19.98
  

  The quoted upper limits have not been corrected for the expected Galactic extinction along the line of sight of E_(B-V) = 0.01 mag (Schlegel et al. 1998). All photometry is on the UVOT photometric system described in Poole et al. (2008, MNRAS, 383, 627).
• GCN Circular #10221
  T. N. Ukwatta (GWU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC), J. L. Racusin (NASA/GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC) (i.e. the Swift-BAT team):
  Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 091130 (trigger #377487) (Racusin, et al., GCN Circ. 10214). The BAT ground-calculated position is RA, Dec = 203.149, 34.086 deg which is

      RA(J2000)  =  13h 32m 35.8s
      Dec(J2000) = +34d 05' 11.0"
  

  with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 77%.
  The mask-weighted light curve shows several broad, irregular, overlapping peaks starting at T-25 sec, peaking at T0 and ending about T+120 sec. T90 (15-350 keV) is 112.5 +- 17.1 sec (estimated error including systematics).
  The time-averaged spectrum from T-4.7 to T+127.4 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.15 +- 0.15. The fluence in the 15-150 keV band is 1.3 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-0.06 sec in the 15-150 keV band is 1.1 +- 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/377487/BA/
• GCN Circular #10222
  K.L. Page (U. Leicester) and J. L. Racusin (NASA/GSFC) report on behalf of the Swift-XRT team:
  We have analysed 12 ks of XRT data for GRB 091130B (Racusin et al. GCN Circ. 10214), from 91 s to 29.1 ks after the BAT trigger. The data comprise 155 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Goad et al. (GCN. Circ 10218).
  The light curve can be modelled with a series of power-law decays. The initial index is alpha=-0.36 (+0.87, -1.14) - i.e., the light curve rises slightly. At T+107 s the light curve starts decaying with an alpha of 3.58 (+0.24, -0.17). The light curve breaks again at T+172 s to a decay with alpha=2.11 (+0.24, -0.06), before a final break at T+4020 s, after which the decay index is 0.32 (+0.10, -0.11).
  A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 2.26 (+0.07, -0.06). The best-fitting absorption column is 2.32 (+/-0.17) x 10^21 cm^-2, in excess of the Galactic value of 8.0 x 10^19 cm^-2 (Kalberla et al. 2005). The PC mode spectrum has a photon index of 2.48 (+0.18, -0.19) and a best-fitting absorption column of 1.66 (+0.23, -0.43) x 10^21 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.2 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 0.32, the count rate at T+24 hours will be 0.030 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 9.6 x 10^-13 (1.7 x 10^-12) erg cm^-2 s^-1.
  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00377487.
  This circular is an official product of the Swift-XRT team.
• GCN Report 262.1
  GCN_Report 262.1 has been posted: http://gcn.gsfc.nasa.gov/reports/report_262_1.pdf by J.L. Racusin at NASA/GSFC titled: "Final Swift Observations on GRB 091130B"