Gamma-ray Burst 201014A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 14 Oct 20 22:49:54 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  GRB_RA:           20.847d {+01h 23m 23s} (J2000),
                    21.135d {+01h 24m 32s} (current),
                    20.155d {+01h 20m 37s} (1950)
  GRB_DEC:         +27.692d {+27d 41' 32"} (J2000),
                   +27.800d {+27d 48' 01"} (current),
                   +27.432d {+27d 25' 53"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       0 [cnts]    Image_Peak=1195 [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:        19136 TJD;   288 DOY;   20/10/14
  GRB_TIME:        82118.19 SOD {22:48:38.19} UT
  GRB_PHI:         -14.74 [deg]
  GRB_THETA:        14.70 [deg]
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    7.38 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +6  +1  -3  +0  +0 +94  +0 
  SUN_POSTN:       200.39d {+13h 21m 33s}   -8.59d {-08d 35' 13"}
  SUN_DIST:        160.77 [deg]   Sun_angle= 12.0 [hr] (West of Sun)
  MOON_POSTN:      177.84d {+11h 51m 22s}   +6.42d {+06d 25' 16"}
  MOON_DIST:       139.04 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.53,-34.65 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:       29.80, 17.52 [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 = 47.04,11.95 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 14 Oct 20 22:51:44 UT
  NOTICE_TYPE:     Swift-XRT Nack-Position
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  POINT_RA:         20.880d {+01h 23m 31s} (J2000)
  POINT_DEC:       +27.648d {+27d 38' 54"} (J2000)
  IMG_START_DATE:  19136 TJD;   288 DOY;   20/10/14
  IMG_START_TIME:  82290.90 SOD {22:51:30.90} UT,   172.7 [sec] since BAT Trigger Time
  COUNTS:          16    Min_needed= 20
  STD_DEV:         0.00   Max_StdDev_for_Good=28.44 [arcsec]
  PH2_ITER:        2    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:     Wed 14 Oct 20 22:53:10 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  GRB_RA:           20.847d {+01h 23m 23s} (J2000),
                    21.135d {+01h 24m 32s} (current),
                    20.155d {+01h 20m 37s} (1950)
  GRB_DEC:         +27.692d {+27d 41' 32"} (J2000),
                   +27.800d {+27d 48' 01"} (current),
                   +27.432d {+27d 25' 53"} (1950)
  GRB_DATE:        19136 TJD;   288 DOY;   20/10/14
  GRB_TIME:        82118.19 SOD {22:48:38.19} UT
  TRIGGER_INDEX:   20000
  GRB_PHI:         -14.74 [deg]
  GRB_THETA:        14.70 [deg]
  DELTA_TIME:      0.00 [sec]
  TRIGGER_DUR:     64.000 [sec] 
  SOLN_STATUS:     0x13
  RATE_SIGNIF:     0.00 [sigma]
  IMAGE_SIGNIF:    7.38 [sigma]
  LC_URL:          sw01000255000msb.lc
  SUN_POSTN:       200.39d {+13h 21m 34s}   -8.59d {-08d 35' 16"}
  SUN_DIST:        160.77 [deg]   Sun_angle= 12.0 [hr] (West of Sun)
  MOON_POSTN:      177.87d {+11h 51m 29s}   +6.41d {+06d 24' 27"}
  MOON_DIST:       139.07 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.53,-34.65 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:       29.80, 17.52 [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 = 47.04,11.95 [deg].  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 14 Oct 20 22:55:59 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  POINT_RA:         20.880d {+01h 23m 31s} (J2000)
  POINT_DEC:       +27.648d {+27d 38' 54"} (J2000)
  ROLL:            1.369d
  IMG_START_DATE:  19136 TJD;   288 DOY;   20/10/14
  IMG_START_TIME:  82294.62 SOD {22:51:34.62} UT,   176.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     624408720
  X_OFFSET:        968 [pixels]
  Y_OFFSET:        532 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1128
  Y_GRB_POS:       692
  BINNING_INDEX:   1
  IM_URL:          sw01000255000msuni0202.fits
  SUN_POSTN:       200.39d {+13h 21m 34s}   -8.59d {-08d 35' 19"}
  SUN_DIST:        160.82 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
  MOON_POSTN:      177.90d {+11h 51m 36s}   +6.40d {+06d 23' 44"}
  MOON_DIST:       139.11 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.58,-34.68 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       29.81, 17.47 [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 13 Oct 20 04:08:57 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     999948,   Seg_Num: 0
  POINT_RA:        107.335d {+07h 09m 20s} (J2000)
  POINT_DEC:       +57.038d {+57d 02' 17"} (J2000)
  ROLL:            93.175d
  IMG_START_DATE:  19135 TJD;   287 DOY;   20/10/13
  IMG_START_TIME:  14455.67 SOD {04:00:55.67} UT,   865.0 [sec] since BAT Trigger Time
  FILTER:          10, White
  EXPOSURE_ID:     624254481
  X_OFFSET:        981 [pixels]
  Y_OFFSET:        776 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1141
  Y_GRB_POS:       936
  BINNING_INDEX:   1
  IM_URL:          sw00999948000msuni0891.fits
  SUN_POSTN:       198.74d {+13h 14m 57s}   -7.93d {-07d 55' 37"}
  SUN_DIST:         97.17 [deg]   Sun_angle= 6.1 [hr] (West of Sun)
  MOON_POSTN:      153.30d {+10h 13m 13s}  +16.08d {+16d 05' 03"}
  MOON_DIST:        53.21 [deg]
  MOON_ILLUM:      18 [%]
  GAL_COORDS:      159.64, 24.86 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      101.31, 34.28 [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:     Wed 14 Oct 20 22:59:48 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  POINT_RA:         20.879d {+01h 23m 31s} (J2000)
  POINT_DEC:       +27.648d {+27d 38' 53"} (J2000)
  POINT_ROLL:      1.365d
  IMG_START_DATE:  19136 TJD;   288 DOY;   20/10/14
  IMG_START_TIME:  82453.79 SOD {22:54:13.79} UT,   335.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  BKG_MEAN:        0.665
  N_STARS:         171
  X_OFFSET:        409 [pixels]
  Y_OFFSET:        0 [pixels]
  X_MAX:           1848 [pixels]
  Y_MAX:           1439 [pixels]
  DET_THRESH:      7
  PHOTO_THRESH:    3
  SL_URL:          sw01000255000msufc0335.fits
  SUN_POSTN:       200.39d {+13h 21m 35s}   -8.59d {-08d 35' 22"}
  SUN_DIST:        160.82 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
  MOON_POSTN:      177.93d {+11h 51m 44s}   +6.38d {+06d 22' 47"}
  MOON_DIST:       139.15 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.58,-34.68 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       29.81, 17.47 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 14 Oct 20 22:54:28 UT
  NOTICE_TYPE:     Swift-UVOT Source List
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  POINT_RA:         20.880d {+01h 23m 31s} (J2000)
  POINT_DEC:       +27.648d {+27d 38' 54"} (J2000)
  POINT_ROLL:      1.369d
  IMG_START_DATE:  19136 TJD;   288 DOY;   20/10/14
  IMG_START_TIME:  82294.62 SOD {22:51:34.62} UT,   176.4 [sec] since BAT Trigger Time
  FILTER:          10, White
  BKG_MEAN:        2.294
  N_STARS:         119
  X_OFFSET:        649 [pixels]
  Y_OFFSET:        213 [pixels]
  X_MAX:           1608 [pixels]
  Y_MAX:           1172 [pixels]
  DET_THRESH:      13
  PHOTO_THRESH:    6
  SL_URL:          sw01000255000msufc0176.fits
  SUN_POSTN:       200.39d {+13h 21m 34s}   -8.59d {-08d 35' 17"}
  SUN_DIST:        160.82 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
  MOON_POSTN:      177.88d {+11h 51m 32s}   +6.40d {+06d 24' 07"}
  MOON_DIST:       139.10 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.58,-34.68 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       29.81, 17.47 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-UVOT Source List.  
  

  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 14 Oct 20 23:01:21 UT
  NOTICE_TYPE:     Swift-UVOT Image
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  POINT_RA:         20.879d {+01h 23m 31s} (J2000)
  POINT_DEC:       +27.648d {+27d 38' 53"} (J2000)
  ROLL:            1.365d
  IMG_START_DATE:  19136 TJD;   288 DOY;   20/10/14
  IMG_START_TIME:  82453.79 SOD {22:54:13.79} UT,   335.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     624408879
  X_OFFSET:        968 [pixels]
  Y_OFFSET:        559 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1128
  Y_GRB_POS:       719
  BINNING_INDEX:   1
  IM_URL:          sw01000255000msuni0361.fits
  SUN_POSTN:       200.40d {+13h 21m 35s}   -8.59d {-08d 35' 24"}
  SUN_DIST:        160.82 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
  MOON_POSTN:      177.95d {+11h 51m 48s}   +6.37d {+06d 22' 23"}
  MOON_DIST:       139.16 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.58,-34.68 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       29.81, 17.47 [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:     Wed 14 Oct 20 23:01:22 UT
  NOTICE_TYPE:     Swift-UVOT Processed Image
  TRIGGER_NUM:     1000255,   Seg_Num: 0
  POINT_RA:         20.879d {+01h 23m 31s} (J2000)
  POINT_DEC:       +27.648d {+27d 38' 53"} (J2000)
  ROLL:            1.365d
  IMG_START_DATE:  19136 TJD;   288 DOY;   20/10/14
  IMG_START_TIME:  82453.79 SOD {22:54:13.79} UT,   335.6 [sec] since BAT Trigger Time
  FILTER:          7, U
  EXPOSURE_ID:     624408879
  X_OFFSET:        968 [pixels]
  Y_OFFSET:        559 [pixels]
  WIDTH:           160 [pixels]
  HEIGHT:          160 [pixels]
  X_GRB_POS:       1128
  Y_GRB_POS:       719
  BINNING_INDEX:   1
  IM_URL:          sw01000255000msuni0361.fits
  SUN_POSTN:       200.40d {+13h 21m 35s}   -8.59d {-08d 35' 24"}
  SUN_DIST:        160.82 [deg]   Sun_angle= 11.9 [hr] (West of Sun)
  MOON_POSTN:      177.95d {+11h 51m 48s}   +6.37d {+06d 22' 23"}
  MOON_DIST:       139.16 [deg]
  MOON_ILLUM:      5 [%]
  GAL_COORDS:      131.58,-34.68 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       29.81, 17.47 [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 #28623
  E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), A. D'Ai (INAF-IASFPA), V. D'Elia (SSDC), J.D. Gropp (PSU), J. A. Kennea (PSU), N. P. M. Kuin (UCL-MSSL), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), B. Sbarufatti (PSU), M. Stamatikos (OSU/NASA/GSFC) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
  At 22:48:38 UT, the Swift Burst Alert Telescope (BAT) found a peak in a waiting mode image (trigger=1000255). Swift slewed immediately to the location. The BAT on-board calculated location is RA, Dec 20.847, +27.692 which is

     RA(J2000) = 01h 23m 23s
     Dec(J2000) = +27d 41' 32"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). As is typical for an image trigger, no obvious variation is apparent in the immediately available lightcurve.
  No source was detected in 666 s of promptly downlinked data. We are waiting for the full dataset to detect and localise the XRT counterpart.
  UVOT took a finding chart exposure of 150 seconds with the White filter starting 176 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 25% of the BAT 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 BAT 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 0.08.
  Due to the marginal detection in the BAT image (7.4 sigma), the lack of a rate trigger, and the non-detection of an afterglow by XRT, we believe that this is probably not an astrophysical event. Determination of the nature of this trigger will require the full downlinked dataset.
• GCN Circular #28626
  V. D’Elia (SSDC), E. Ambrosi, A. D’Aì (INAF-IASFPA) and P.A. Evans (U. Leicester) report for the Swift-XRT team:
  We have analysed 1.5 ks of XRT data for the Swift trigger 1000255 (Ambrosi et al. GCN Circ. 28623), from 156 s to 5.2 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. We detect a bright (2.2E-1 cts/s), fading, uncatalogued X-ray source at the UVOT-enhanced position: 20.79619, 27.66024 which is equivalent to:

  RA (J2000):  01 23 11.09
  Dec (J2000): +27 39 36.9
  

  with an uncertainty of 1.8 arcseconds (radius, 90% containment). This location is 3.3 arcminutes from the BAT onboard position, at the margin of the BAT error circle. This position was outside of the central window which is telemetered promptly, hence the source was not seen in the initial real-time analysis
  Given that no catalogued X-ray sources are present within 5 arc minutes from the XRT position, we conclude that Swift-BAT trigger 1000255 is not due to noise but indeed is a GRB, and the reported source is the X-ray afterglow of GRB 201014A.
  This is an official product of the Swift-XRT team.
• GCN Circular #28628
  A. Pozanenko (IKI), N. Pankov (HSE), V. Rumyantsev (CrAO), S. Belkin (IKI), A. Volnova (IKI) report on behalf of larger GRB follow-up collaboration:
  We observed the field of the GRB 201014A = (trigger=1000255) (Ambrosi et al., GCN 28623) with ZTSH 2.6m telescope of CrAO observatory starting on Oct. 14 (UT) 23:06:56, i.e. 18.3 minutes after burst detection. We detect an object at the edge of enhanced XRT afterglow position (D’Elia et al., GCN 28626). The coordinates of the object are (J2000) 01 23 11.058 +27 39 38.39 with uncertainty of 0.3 arcsec in each coordinate.The object is absent in both SDSS DR12 and PS1 catalogues. We suggest the object is an optical afterglow GRB 201014A.
  Preliminary photometry of the object in a combined image is following

  Date      UT start   t-T0    Filter  Exp.     OT      err    UL(3sigma)
                        (mid, days)       (s)
  
  2018-10-14 23:06:56  0.021967 R      11*120   21.50   0.15   22.6
  

  The photometry is based on several nearby USNO-B1.0 stars.
• GCN Circular #28629
  A. Y. Lien (GSFC/UMBC), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), 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+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 201014A (trigger #1000255) (Ambrosi et al., GCN Circ. 28623; D'Elia et al., GCN Circ 28626). The BAT ground-calculated position is RA, Dec = 20.834, 27.722 deg which is

     RA(J2000)  =  01h 23m 20.2s
     Dec(J2000) = +27d 43' 19.1"
  

  with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%.
  The mask-weighted light curve shows a weak pulse that starts at ~T+30 s and ends at ~T+70 s. T90 (15-350 keV) is 36.2 +- 8.1 sec (estimated error including systematics).
  The time-averaged spectrum from T+30.16 to T+69.84 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.55 +- 0.37. The fluence in the 15-150 keV band is 3.1 +- 0.7 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+59.44 sec in the 15-150 keV band is 0.3 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
  The ground analysis shows an improved image significance of 8.2 sigma in 15-350 keV. Also, the temporal and spectral characteristics are consistent with those of a long GRB. Therefore, the BAT ground analysis confirms that this is a GRB, consistent with the conclusion reported in D'Elia et al., GCN Circ 28626.
  The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/1000255/BA/
• GCN Circular #28630
  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), R. Fernandez-Munoz (IHSM/UMA-CSIC) and F. Rendon (IAA-CSIC and INTA-CEDEA) on behalf of a larger collaboration, report:
  Following the Swift trigger of GRB 201014A (Ambrosi et al., GCNC 28623), the 60cm BOOTES-2/TELMA robotic telescope at IHSM La Mayora (UMA-CSIC) in Algarrobo Costa (Malaga, Spain) automatically responded to this event. A series of images were taken starting 22:50:46UT (132 s after trigger) with clear filter. In the co-added 60s exposure image, no soure is detected which down to 20.6 mag at the XRT afterglow position (D¡¯Elia et al., GCNC 28626).
  The 0.3m BOOTES-1B robotic telescope in Mazagon (Huelva), southern Spain, automatically responded to this event at 22:50:20UT (102 s after trigger). In the co-added of 60 s exposure images, no new source is detected which down to 20.3 mag (clear filter).
  These early optical non-detections are consistent with the afterglow magnitude reported by Pozanenko et al. (GCNC 28628).
  We thank the staff at INTA-CEDEA and La Mayora for their excellent support.
• GCN Circular #28638
  M. Perri (ASDC), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA), D.N. Burrows (PSU), J. D. Gropp (PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester) and V.D’Elia report on behalf of the Swift-XRT team:
  We have analysed 5.1 ks of XRT data for GRB 201014A (D’Elia et al. GCN Circ. 28626), from 176 s to 69.0 ks after the BAT trigger. The data comprise 17 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. Using 1385 s of PC mode data and 2 UVOT images, we find an enhanced XRT position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 20.79619, +27.66024 which is equivalent to:

  RA (J2000): 01h 23m 11.09s
  Dec(J2000): +27d 39' 36.9"
  

  with an uncertainty of 1.8 arcsec (radius, 90% confidence).
  The light curve can be modelled with an initial power-law decay with an index of alpha=3.8 (+1.7, -0.7), followed by a break at T+360 s to an alpha of 0.58 (+0.09, -0.07).
  A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.92 (+0.27, -0.24). The best-fitting absorption column is 1.1 (+0.8, -0.4) x 10^21 cm^-2, consistent with the Galactic value of 7.9 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 (4.3 x 10^-11) erg cm^-2 count^-1.
  A summary of the PC-mode spectrum is thus:

  Total column:	     1.1 (+0.8, -0.4) x 10^21 cm^-2
  Galactic foreground: 7.9 x 10^20 cm^-2
  Excess significance: <1.6 sigma
  Photon index:	     1.92 (+0.27, -0.24)
  

  The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01000255.
  This circular is an official product of the Swift-XRT team.
• GCN Circular #28644
  GRB 201014A: Swift/UVOT Upper Limits
  J. D. Gropp (PSU) and E. Ambrosi (INAF-IASFPA) report on behalf of the Swift/UVOT team:
  The Swift/UVOT began settled observations of the field of GRB 201014A 176 s after the BAT trigger (Ambrosi et al., GCN Circ. 28623) . No optical afterglow consistent with the XRT position (D'Elia et al., GCN Circ. 28626) 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 first finding chart (FC) exposure and subsequent exposures are:

  Filter         T_start(s)   T_stop(s)      Exp(s)         Mag
  
  b               3291          3483              38            >19.17
  uvm2        7457          7657             196           >19.18
  u               3035          7877             275           >19.82
  v               3365          7452             235           >19.24
  uvw1        3414          7862             216           >19.25
  uvw2        3514          7248             216           >19.32
  white        2876          7042             382           >21.14
  

  The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.05 in the direction of the burst (Schlegel et al. 1998).
• GCN Circular #28650
  A. de Ugarte Postigo (HETH/IAA-CSIC, DARK/NBI), D.A. Kann, M. Blazek, J.F. Agui Fernandez, C. Thoene (all HETH/IAA-CSIC), G. Gomez Velarde and A. Perez Romero (both GRANTECAN) report:
  We observed the afterglow of GRB 201014A (Ambrosi et al. GCN 28623; D’Elia et al. GCN 28626; Pozanenko et al. GCN 28628) with the 10.4m GTC telescope, at Roque de los Muchachos Observatory (La Palma, Spain) equipped with OSIRIS. The observation started on 16 October 2020 at 5:10 UT (30.36 hrs after the GRB onset) and consisted of 3x1200s with the R1000B grism, covering the range between 3700 and 7800 Å.
  The spectrum shows signal redwards of 5150 AA, consistent with the Lyman forest, Lyman alpha, SiII, SiIV, OI, and CII at a common redshift of 4.56, which we identify as the redshift of the GRB.
• GCN Circular #28654
  S.Dichiara (UMD, NASA-GSFC), S.B. Cenko (NASA-GSFC), E. Troja (UMD, NASA-GSFC), P. Gatkine (Caltech), J.M. Durbak (UMD), A. Kutyrev (UMD, NASA-GSFC), S. Veilleux (UMD), report on behalf of a larger collaboration:
  We observed the field of the GRB 201014A (Ambrosi et al., GCN 28623) using the Large Monolithic Imager (LMI) on the 4.3m Lowell Discovery Telescope (LDT) at Happy Jack, AZ. Observations started on October 16, 07:08:10 UT (1.35 days after the Swift trigger) taking 4 exposures of 175 s each with SDSS i and SDSS r filters. Observations were taken at an airmass of about 1.01 and seeing of about 1.7". We detected the optical transient (Pozanenko et al., GCN 28628; de Ugarte Postigo et al, GCN 28650) inside the enhanced XRT position (D'Elia et al. GCN 28626) measuring the following AB magnitudes: i=22.75 +- 0.07 and r=24.30 +- 0.12.
  Magnitudes are calibrated against the SDSS catalog and not corrected for Galactic extinction.
  The r/i drop-out is consistent with the high-z measured from GTC (de Ugarte Postigo et al, GCN 28650).
  We thank the staff of the Lowell Discovery Telescope and Quanzhi Ye for assistance with these observations.
• GCN Circular #28655
  Z.P. Zhu (HUST/NAOC), X. Liu, S.Y. Fu, D. Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:
  We observed the field of GRB 201014A (Swift trigger =1000255, Ambrosi et al., GCN 28623) using the NEXT-0.6m optical telescope located at Nanshan, Xinjiang, China. Observations automatically started at 22:52:30 UT on 2020-10-14, i.e., 232 s after the BAT trigger, and 3x40s, 4x60s, 12x90s frames in the Sloan r-filter were obtained.
  The optical afterglow (Pozanenko et al., GCN 28628; de Ugarte Postigo et al, GCN 28650) inside the enhanced XRT position (D'Elia et al. GCN 28626) is weakly detected in our stacked image, with r = 20.9 +/- 0.3 at T-mid = 0.324 hr after the BAT trigger, calibrated with nearby Pan-STARRS stars.
• GCN Circular #28685
  T. Laskar (University of Bath), K. Paterson, J. Rastinejad, C. D. Kilpatrick, and W. Fong (Northwestern) report on behalf of a larger collaboration:
  "We observed Swift GRB 201014A (Ambrosi et al., GCN 28623) with Binospec on the MMT 6.5-meter telescope at Mount Hopkins, Arizona. We obtained 10x120-sec imaging in the i' and z' bands beginning on 2020 October 17 at 08:55:10 UT and 09:31:56 UT, respectively.
  Within the XRT position (D'Elia et al., GCN 28626; Perri et al., GCN 28638), we detect the previously reported optical afterglow (Pozanenko et al., GCN 28628; Zhu et al., GCN 28655). Calibrated to SDSS, we measure i' = 23.3 +/- 0.1 mag and z' = 22.8 +/- 0.1 mag at a mid-time of 2.45 days since the burst. Magnitudes are in the AB system and are not corrected for Galactic extinction.
  We thank Skyler Self and Ben Weiner at the MMT for the rapid scheduling and execution of these observations.''
• GCN Circular #28689
  A. Kumar (ARIES), R. Gupta (ARIES), Dimple (ARIES), A. Ghosh (ARIES), A. Aryan (ARIES), B. Kumar (ARIES), N Panwar (ARIES), S. B. Pandey (ARIES),
  and K. Misra (ARIES) report:
  We observed the XRT localized GRB 201014A (Swift trigger =1000255, Ambrosi et al., GCN 28623; Perri et al., GCN 28638) using the 4Kx4K CCD Imager (Pandey et al. 2018, 2018BSRSL..87...42P) mounted at axial port of the 3.6m Devasthal Optical Telescope (DOT) of ARIES Nainital. The observations were carried out on 2020-10-15 in Bessel R-band (300s X 2 frames) from UT 21:22:35 to 21:32:59 (corresponding to 22.6 hours after the BAT trigger time).
  No new optical source was detected within the Swift XRT enhanced error circle (see also Pozanenko et al., GCN 28628; de Ugarte Postigo et al, GCN 28650, Zhu et al, GCN 28655). The aperture photometry on the stacked R-band image was performed and calibrated against the USNO-B1 nearby stars.
  The 3-sigma upper limit within the XRT error circle is as follows:

  T_start-T0 (hours),       Start UT,            End UT,          Filter,       3-sigma upper limit
  
  ---------------------------------------------------------------------------------------------
  22.57, 2020-10-15 UT 21:22:35.8, 2020-10-15 UT  21:32:58.9,  R, >22.5 mag
  

  The limiting magnitude is not corrected for Galactic extinction in the the direction of the GRB.
  3.6m Devasthal Optical Telescope (DOT) is a recently commissioned facility in Northern Himalayan region of India (long:79 41 04E, lat:29 21 40N, alt:2540m) owned and operated by the Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital (https://www.aries.res.in). Authors of this GCN circular thankfully acknowledge consistent support from the staff members to run and maintain the 3.6m DOT. This circular may be cited.
• GCN Circular #28699
  A. S. Moskvitin, V. N. Aitov (SAO RAS) on behalf of GRB follow-up team report.
  We observed the field of GRB 201014A, Swift trigger 1000255 (Ambrosi et al., GCN 28623) with the 1-m telescope of SAO RAS, Zeiss-1000 + Multi-Mode Photometer-Polarimeter.
  We obtained 6 x 300 sec. images in Rc band on October 15, 21:11:44--21:43:50, t_mid - T0 = 0.9439 days since trigger.
  Inside the enhanced XRT circle (D’Elia et al., GCN #28626; Perri et al., GCN #28638) we marginally detected the GRB OT (Pozanenko et al., GCN #28628; de Ugarte Postigo et al., GCN #28650; Dichiara et al., GCN #28654; Zhu et al., GCN #28655) with the brightness of R = 24.0 +/- 0.3 (calibrated against the nearby SDSS stars, magnitudes converted with the Lupton 2005 equations).
  We also obtained 12 x 300 sec. images in Rc band on October 16, 20:55:16--21:59:23, t_mid - T0 = 1.9435 days since trigger. We did not detect OT down to the limiting magnitude of R_lim = 24.0.
• GCN Circular #28741
  Brajesh Kumar (ARIES, Nainital), Anirban Dutta, G. C. Anupama, D. K. Sahu, Pramod Kumar (IIA, Bengaluru), Amit Kumar, Avinash Singh (ARIES, Nainital)
  We observed the field of GRB 201014A (Ambrosi et al., GCN 28623, D'Elia et al., GCN 28626) with the Himalaya Faint Object Spectrograph and Camera (HFOSC) mounted on the 2-m Himalayan Chandra Telescope (IAO, Hanle). Three frames (each 300 sec) of the GRB field were obtained in the Bessell R-band in the average sky conditions. Preliminary PSF photometry on the stacked image was performed and calibrated against USNO-B1 catalogue stars. We do not detect any OT candidate (Pozanenko et al., GCN 28628, de Ugarte Postigo et al, GCN 28650, Dichiara et al. 28654, Zhu et al, GCN 28655, Laskar et al. 28685, Kumar et al. 28689, Moskvitin et al. 28699) within the enhanced XRT position (Perri et al., GCN 28638).
  The upper limit in the stacked image is the following:

  DATE           UT    Filter Exposure(sec)  Frames  Upper limit (mag)
  2020-10-15  15:55:29    R        300         3          21.7
  

  We thank the staff at IAO and CREST for helping with the observations.