Gamma-ray Burst 191029A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

   
  TITLE:           GCN/SWIFT NOTICE 
  NOTICE_DATE:     Tue 29 Oct 19 11:31:09 UT 
  NOTICE_TYPE:     Swift-BAT GRB Position 
  TRIGGER_NUM:     932058,   Seg_Num: 0 
  GRB_RA:          352.140d {+23h 28m 34s} (J2000), 
                   352.407d {+23h 29m 38s} (current), 
                   351.465d {+23h 25m 52s} (1950) 
  GRB_DEC:         -40.464d {-40d 27' 49"} (J2000), 
                   -40.354d {-40d 21' 15"} (current), 
                   -40.739d {-40d 44' 21"} (1950) 
  GRB_ERROR:       3.00 [arcmin radius, statistical only] 
  GRB_INTEN:       0 [cnts]    Image_Peak=1370 [image_cnts] 
  TRIGGER_DUR:     64.000 [sec]  
  TRIGGER_INDEX:   20000     E_range: 15-50 keV 
  BKG_INTEN:       0 [cnts] 
  BKG_TIME:        0.00 SOD {00:00:00.00} UT 
  BKG_DUR:         0 [sec] 
  GRB_DATE:        18785 TJD;   302 DOY;   19/10/29 
  GRB_TIME:        40520.16 SOD {11:15:20.16} UT 
  GRB_PHI:          38.50 [deg] 
  GRB_THETA:        33.53 [deg] 
  SOLN_STATUS:     0x13 
  RATE_SIGNIF:     0.00 [sigma] 
  IMAGE_SIGNIF:    9.55 [sigma] 
  MERIT_PARAMS:     +1  +0  +0  +6  +1  +0  +0  +0 +40  +0  
  SUN_POSTN:       213.45d {+14h 13m 47s}  -13.44d {-13d 26' 14"} 
  SUN_DIST:        114.12 [deg]   Sun_angle= -9.3 [hr] (East of Sun) 
  MOON_POSTN:      232.21d {+15h 28m 49s}  -15.14d {-15d 08' 13"} 
  MOON_DIST:       101.59 [deg] 
  MOON_ILLUM:      2 [%] 
  GAL_COORDS:      349.70,-68.32 [deg] galactic lon,lat of the burst (or transient) 
  ECL_COORDS:      334.87,-33.64 [deg] ecliptic lon,lat of the burst (or transient) 
  COMMENTS:        SWIFT-BAT GRB Coordinates.   
  COMMENTS:        This Notice was delayed by more than 60 sec past the end of the trigger integration interval;   
  COMMENTS:        probably due to it occurring during a Malindi downlink session.   
  COMMENTS:        This is an image trigger.  (The RATE_SIGNIF & BKG_{INTEN, TIME, DUR} are undefined.)   
  COMMENTS:        A point_source was found.   
  COMMENTS:        This does not match any source in the on-board catalog.   
  COMMENTS:        This does not match any source in the ground catalog.   
  COMMENTS:        This is a GRB.   
  COMMENTS:        This trigger occurred at longitude,latitude = 257.70,-19.92 [deg].   
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Tue 29 Oct 19 11:31:42 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     932058,   Seg_Num: 0
  GRB_RA:          352.140d {+23h 28m 34s} (J2000),
                   352.407d {+23h 29m 38s} (current),
                   351.465d {+23h 25m 52s} (1950)
  GRB_DEC:         -40.464d {-40d 27' 49"} (J2000),
                   -40.354d {-40d 21' 15"} (current),
                   -40.739d {-40d 44' 21"} (1950)
  GRB_DATE:        18785 TJD;   302 DOY;   19/10/29
  GRB_TIME:        40520.16 SOD {11:15:20.16} UT
  TRIGGER_INDEX:   20000
  GRB_PHI:          38.50 [deg]
  GRB_THETA:        33.53 [deg]
  DELTA_TIME:      0.00 [sec]
  TRIGGER_DUR:     64.000 [sec] 
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    9.55 [sigma]
  LC_URL:          sw00932058000msb.lc
  SUN_POSTN:       213.45d {+14h 13m 47s}  -13.44d {-13d 26' 14"}
  SUN_DIST:        114.12 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
  MOON_POSTN:      232.21d {+15h 28m 51s}  -15.14d {-15d 08' 19"}
  MOON_DIST:       101.59 [deg]
  MOON_ILLUM:      2 [%]
  GAL_COORDS:      349.70,-68.32 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      334.87,-33.64 [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 = 257.70,-19.92 [deg].  
  

• GCN Circular #26088
  P. A. Evans (U Leicester), J.D. Gropp (PSU), J. A. Kennea (PSU), N. J. Klingler (PSU), K. L. Page (U Leicester) and A. Tohuvavohu (Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
  At 11:15:20 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 191029A (trigger=932058). Swift did not slew immediately because of an observing constraint. The BAT on-board calculated location is RA, Dec 352.140, -40.464 which is

     RA(J2000) = 23h 28m 34s
     Dec(J2000) = -40d 27' 49"
  

  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 40 sec. The peak count rate was ~1080 counts/sec (15-350 keV), at ~2 sec after the trigger.
  Due to an observing constraint, Swift will not slew until T0+48.5 minutes. There will be no XRT or UVOT data until this time.
  Burst Advocate for this burst is P. A. Evans (pae9 AT star.le.ac.uk). 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/)
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Tue 29 Oct 19 12:07:08 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     932058,   Seg_Num: 0
  POINT_RA:        352.121d {+23h 28m 29s} (J2000)
  POINT_DEC:       -40.465d {-40d 27' 51"} (J2000)
  IMG_START_DATE:  18785 TJD;   302 DOY;   19/10/29
  IMG_START_TIME:  43615.29 SOD {12:06:55.29} UT,   3095.1 [sec] since BAT Trigger Time
  COUNTS:          1    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        0    Max_iter_allowed= 4
  ERROR_CODE:      1
  COMMENTS:        SWIFT-XRT Nack Position.  
  COMMENTS:        No source found in the image.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Tue 29 Oct 19 12:09:43 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     932058,   Seg_Num: 0
  POINT_RA:        352.121d {+23h 28m 29s} (J2000)
  POINT_DEC:       -40.465d {-40d 27' 51"} (J2000)
  POINT_ROLL:      224.626d
  IMG_START_DATE:  18785 TJD;   302 DOY;   19/10/29
  IMG_START_TIME:  43618.42 SOD {12:06:58.42} UT,   3098.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.834
  N_STARS:         21
  X_OFFSET:        358 [pixels]
  Y_OFFSET:        521 [pixels]
  X_MAX:           1317 [pixels]
  Y_MAX:           1480 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00932058000msufc3098.fits
  SUN_POSTN:       213.47d {+14h 13m 53s}  -13.45d {-13d 26' 46"}
  SUN_DIST:        114.08 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
  MOON_POSTN:      232.59d {+15h 30m 20s}  -15.25d {-15d 15' 09"}
  MOON_DIST:       101.25 [deg]
  MOON_ILLUM:      2 [%]
  GAL_COORDS:      349.71,-68.30 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      334.85,-33.64 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Tue 29 Oct 19 12:09:57 UT
  NOTICE_TYPE:     Swift-UVOT Processed Source List
  TRIGGER_NUM:     932058,   Seg_Num: 0
  POINT_RA:        352.121d {+23h 28m 29s} (J2000)
  POINT_DEC:       -40.465d {-40d 27' 51"} (J2000)
  POINT_ROLL:      224.626d
  IMG_START_DATE:  18785 TJD;   302 DOY;   19/10/29
  IMG_START_TIME:  43618.42 SOD {12:06:58.42} UT,   3098.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        1.834
  N_STARS:         21
  X_OFFSET:        358 [pixels]
  Y_OFFSET:        521 [pixels]
  X_MAX:           1317 [pixels]
  Y_MAX:           1480 [pixels]
  DET_THRESH:      11
  PHOTO_THRESH:    6
  SL_URL:          sw00932058000msufc3098.fits
  SUN_POSTN:       213.47d {+14h 13m 53s}  -13.45d {-13d 26' 46"}
  SUN_DIST:        114.08 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
  MOON_POSTN:      232.59d {+15h 30m 21s}  -15.25d {-15d 15' 11"}
  MOON_DIST:       101.25 [deg]
  MOON_ILLUM:      2 [%]
  GAL_COORDS:      349.71,-68.30 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      334.85,-33.64 [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:     Tue 29 Oct 19 12:11:09 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     932058,   Seg_Num: 0
  POINT_RA:        352.121d {+23h 28m 29s} (J2000)
  POINT_DEC:       -40.465d {-40d 27' 51"} (J2000)
  ROLL:            224.626d
  IMG_START_DATE:  18785 TJD;   302 DOY;   19/10/29
  IMG_START_TIME:  43618.42 SOD {12:06:58.42} UT,   3098.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     594043642
  X_OFFSET:        677 [pixels]
  Y_OFFSET:        840 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       837
  Y_GRB_POS:       1000
  BINNING_INDEX:   1
  IM_URL:          sw00932058000msuni3122.fits
  SUN_POSTN:       213.47d {+14h 13m 54s}  -13.45d {-13d 26' 47"}
  SUN_DIST:        114.08 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
  MOON_POSTN:      232.60d {+15h 30m 24s}  -15.26d {-15d 15' 24"}
  MOON_DIST:       101.24 [deg]
  MOON_ILLUM:      2 [%]
  GAL_COORDS:      349.71,-68.30 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      334.85,-33.64 [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:     Tue 29 Oct 19 12:11:27 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     932058,   Seg_Num: 0
  POINT_RA:        352.121d {+23h 28m 29s} (J2000)
  POINT_DEC:       -40.465d {-40d 27' 51"} (J2000)
  ROLL:            224.626d
  IMG_START_DATE:  18785 TJD;   302 DOY;   19/10/29
  IMG_START_TIME:  43618.42 SOD {12:06:58.42} UT,   3098.3 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     594043642
  X_OFFSET:        677 [pixels]
  Y_OFFSET:        840 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       837
  Y_GRB_POS:       1000
  BINNING_INDEX:   1
  IM_URL:          sw00932058000msuni3122.fits
  SUN_POSTN:       213.47d {+14h 13m 54s}  -13.45d {-13d 26' 47"}
  SUN_DIST:        114.08 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
  MOON_POSTN:      232.60d {+15h 30m 25s}  -15.26d {-15d 15' 27"}
  MOON_DIST:       101.23 [deg]
  MOON_ILLUM:      2 [%]
  GAL_COORDS:      349.71,-68.30 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      334.85,-33.64 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Processed Image.  
  COMMENTS:        The GRB Position came from the Window Position in the Mode Command.  
  COMMENTS:        The image has 2x2 binning (compression).  
  COMMENTS:        All 4 attachments are included.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Tue 29 Oct 19 12:16:25 UT
  NOTICE_TYPE:     Swift-XRT Position
  TRIGGER_NUM:     932058,   Seg_Num: 0
  GRB_RA:          352.1596d {+23h 28m 38.30s} (J2000),
                   352.4262d {+23h 29m 42.29s} (current),
                   351.4851d {+23h 25m 56.42s} (1950)
  GRB_DEC:         -40.5002d {-40d 30' 00.7"} (J2000),
                   -40.3908d {-40d 23' 26.9"} (current),
                   -40.7758d {-40d 46' 32.7"} (1950)
  GRB_ERROR:       4.2 [arcsec radius, statistical plus systematic, 90% containment]
  GRB_INTEN:       1.00e-10 [erg/cm2/sec]
  GRB_SIGNIF:      10.00 [sigma]
  IMG_START_DATE:  18785 TJD;   302 DOY;   19/10/29
  IMG_START_TIME:  43625.00 SOD {12:07:05.00} UT,   3104.8 [sec] since BAT Trigger Time
  TAM[0-3]:        100.00 100.00 100.00 100.00
  AMPLIFIER:       1
  WAVEFORM:        31
  SUN_POSTN:       213.48d {+14h 13m 54s}  -13.45d {-13d 26' 51"}
  SUN_DIST:        114.07 [deg]   Sun_angle= -9.3 [hr] (East of Sun)
  MOON_POSTN:      232.65d {+15h 30m 36s}  -15.27d {-15d 16' 21"}
  MOON_DIST:       101.20 [deg]
  MOON_ILLUM:      3 [%]
  GAL_COORDS:      349.59,-68.31 [deg] galactic lon,lat of the burst
  ECL_COORDS:      334.86,-33.68 [deg] ecliptic lon,lat of the burst
  COMMENTS:        SWIFT-XRT Coordinates.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        TAM values, flux and significance fields are not valid.  
  COMMENTS:        This position was automatically generated on the ground using  
  COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
  COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
  COMMENTS:        The probability that this is a serendipitous source in the  
  COMMENTS:        SPER window is 2.8% < P(seren) < 6.6%.  
  

• GCN Circular #26090
  J.P. Osborne (U. Leicester), D.N. Burrows (PSU), J.A. Kennea (PSU), G. Cusumano (INAF-IASF PA), M. Perri (ASDC) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:
  The XRT began observing the field of GRB 191029A at 12:06:55.2 UT, 3095.1 seconds after the BAT trigger. Using promptly downlinked data we find an uncatalogued X-ray source located at RA, Dec 352.15967, -40.50028 which is equivalent to:

     RA(J2000)  = 23h 28m 38.32s
     Dec(J2000) = -40d 30' 01.0"
  

  with an uncertainty of 4.2 arcseconds (radius, 90% containment). This location is 141 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at http://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time.
  A power-law fit to a spectrum formed from promptly downlinked event data gives a column density consistent with the Galactic value of 1.78 x 10^20 cm^-2 (Willingale et al. 2013).
• GCN Circular #26091
  

  TITLE:   GCN CIRCULAR 
  NUMBER:  26091 
  SUBJECT: GRB 191029A: iTelescope optical upper limits
  DATE:    19/10/29 17:39:05 GMT
  FROM:    Filipp Dmitrievich Romanov at Amateur astronomer 
  

  I observed the field of GRB 191029A (Evans et al., GCN #26088) with remote telescope T30 (0.50-m f/6.8 reflector + CCD) of iTelescope.Net in Siding Spring Observatory, Australia. Two images with a luminance filter were obtained on 2019-10-29 13:16:48 UT (7288 seconds after trigger) with 60 seconds exposure time and on 13:18:46 UT (7406 seconds after trigger) with 120 seconds exposure time (the average time of each exposure). I did not detect any optical transients (magnitude limit of about 19.2 G from Gaia DR2 catalogue).
• GCN Circular #26092
  Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado (IAA-CSIC), C. Perez del Pulgar, A. Castellon, I. Carrasco, A. Reina (Univ. de Malaga), S. Guziy (Univ. of Nikolaev), D. Xiong, Y. Fan, X. Zhao, J. Bai, C. Wang and Y. Xin (Yunnan Nacional Astronomical Observatory), on behalf of a larger collaboration, report:
  Following the detection of GRB 191029A by Swift (Evans et al. GCNC 26088), the 0.6m BOOTES-4/MET robotic telescope at Lijiang Astronomical Observatory (China) automatic slewed to the GRB position and gathered g-band images starting at 11:31:27 UT (0.26 h after trigger, once the field became reachable). No optical afterglow is found down to 19.2 mag (at 0.9 h median time after trigger). Once the XRT position was available, we also took several images (clear filter) starting at 13:38 UT. No optical afterglow was found down to 20.3 mag (at 2.5 h median time post trigger) at the enhaced XRT position (Osborne et al. GCNC 26090). This is in agreement with Romanov et al. (GCNC 26091).
  We thank the staff at Lijiang Observatory for their excellent support.
• GCN Circular #26094
  P. D'Avanzo (INAF-OAB), J.A. Kennea (PSU), B. Sbarufatti (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), M.G. Bernardini (INAF-OAB), E. Ambrosi (INAF-IASFPA) and P.A. Evans report on behalf of the Swift-XRT team:
  We have analysed 9.0 ks of XRT data for GRB 191029A (Evans et al. GCN Circ. 26088), from 4.0 ks to 27.7 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The refined XRT position is RA, Dec = 352.1492, -40.5661 which is equivalent to:

  RA (J2000): 23 28 35.80
  Dec(J2000): -40 33 58.0
  

  with an uncertainty of 3.6 arcsec (radius, 90% confidence). The light curve is consistent with a constant source of mean count rate 8.2e-02 ct/sec. A power-law fit gives an index of 0.08 (+0.12, -0.13).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.54 (+0.16, -0.10). The best-fitting absorption column is 1.92 (+3.90, -0.14) x 10^20 cm^-2, consistent with the Galactic value of 1.8 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (4.0 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     1.92 (+3.90, -0.14) x 10^20 cm^-2
  Galactic foreground: 1.8 x 10^20 cm^-2
  Excess significance: <1.6 sigma
  Photon index:	     1.54 (+0.16, -0.10)
  

  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00932058.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #26095
  P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) report on behalf of the Swift-XRT team.
  Using 6396 s of XRT Photon Counting mode data and 12 UVOT images for GRB 191029A, 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 = 352.16141, -40.50108 which is equivalent to:

  RA (J2000): 23h 28m 38.74s
  Dec (J2000): -40d 30' 03.9"
  

  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, MNRAS, 397, 1177).
  This circular was automatically generated, and is an official product of the Swift-XRT team.
• GCN Circular #26097
  S. R. Oates (U.Warwick) and P. A. Evans (U. Leicester) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 191029A 4.3 ks after the BAT trigger (Evans et al., GCN Circ. 26088). No optical afterglow consistent with the XRT position (Evans et al. GCN Circ. 26095) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:

  Filter         T_start(s)   T_stop(s)      Exp(s)         Mag
  
  white             4280        22783         1598         >22.1
  v                 4691        15599         1082         >20.2
  b                 5510        28520         2353         >21.7
  u                 5305        21337         1082         >20.9
  w1                5100        17046          723         >20.4
  m2                4895        16504         1082         >20.6
  w2                4486        11309          868         >20.7
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.02 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #26099
  P.A. Evans and K.L. Page (U. Leicester) report on behalf of the Swift-XRT team:
  The XRT refined analysis for GRB 191029A, given in GCN 26094 was incorrect. There is an AGN within the BAT error circle and unfortunately the automated light curve and spectral analysis had been performed for this source, rather than the afterglow.
  The correct refined analysis is below. We apologise for any inconvenience.
  We have analysed 13 ks of XRT data for GRB 191029A (Evans et al. GCN Circ. 26088), from 3.1 ks to 62.0 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 26095).
  The light curve can be modelled with a power-law decay with a decay index of alpha=0.77 (+0.13, -0.12).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.81 (+0.23, -0.19). The best-fitting absorption column is 3.4 (+5.3, -1.6) x 10^20 cm^-2, consistent with the Galactic value of 1.8 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.5 x 10^-11 (3.7 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:        3.4 (+5.3, -1.6) x 10^20 cm^-2
  Galactic foreground: 1.8 x 10^20 cm^-2
  Excess significance: <1.6 sigma
  Photon index:        1.81 (+0.23, -0.19)
  

  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00932058.
• GCN Circular #26110
  A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), P. A. Evans (U Leicester), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
  Using the data set from T-239 to T+240 sec from the recent telemetry downlink, we report further analysis of BAT GRB 191029A (trigger #932058) (Evans, et al., GCN Circ. 26088). The BAT ground-calculated position is RA, Dec = 352.140, -40.464 deg which is

    RA(J2000)  =  23h 28m 33.6s 
    Dec(J2000) = -40d -27' -49.8" 
  

  with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 46%.
  The mask-weighted light curve shows a pair of weak pulses spanning the period from approximately T-5 to T+35 seconds. T90 (15-350 keV) is 39.5 +- 7.9 sec (estimated error including systematics).
  The time-averaged spectrum from T-1.05 to T+45.85 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.77 +- 0.21. The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+1.90 sec in the 15-150 keV band is 1.1 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
  The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/932058/BA/