Gamma-ray Burst 201105A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 05 Nov 20 19:46:01 UT
  NOTICE_TYPE:     Fermi-GBM Flight Position
  RECORD_NUM:      44
  TRIGGER_NUM:     626247072
  GRB_RA:          243.067d {+16h 12m 16s} (J2000),
                   243.300d {+16h 13m 12s} (current),
                   242.508d {+16h 10m 02s} (1950)
  GRB_DEC:         +18.283d {+18d 16' 60"} (J2000),
                   +18.231d {+18d 13' 51"} (current),
                   +18.411d {+18d 24' 38"} (1950)
  GRB_ERROR:       6.42 [deg radius, statistical plus systematic]
  GRB_INTEN:       654 [cnts/sec]
  DATA_SIGNIF:     19.90 [sigma]
  INTEG_TIME:      0.512 [sec]
  GRB_DATE:        19158 TJD;   310 DOY;   20/11/05
  GRB_TIME:        19867.76 SOD {05:31:07.76} UT
  GRB_PHI:          15.00 [deg]
  GRB_THETA:        90.00 [deg]
  DATA_TIME_SCALE: 0.5120 [sec]
  HARD_RATIO:      0.26
  LOC_ALGORITHM:   3 (version number of)
  MOST_LIKELY:      92%  GRB
  2nd_MOST_LIKELY:   5%  Distant Particles
  DETECTORS:       0,0,0, 1,0,1, 0,0,0, 0,0,0, 0,0,
  SUN_POSTN:       221.40d {+14h 45m 36s}  -16.00d {-15d 59' 47"}
  SUN_DIST:         40.45 [deg]   Sun_angle= -1.5 [hr] (East of Sun)
  MOON_POSTN:      102.50d {+06h 50m 01s}  +24.87d {+24d 51' 59"}
  MOON_DIST:       122.43 [deg]
  MOON_ILLUM:      77 [%]
  GAL_COORDS:       33.10, 43.15 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      236.58, 38.65 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_lc_medres34_bn201105230.gif
  COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
  COMMENTS:        This trigger occurred at longitude,latitude = 222.12,20.42 [deg].  
  COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 05 Nov 20 19:46:05 UT
  NOTICE_TYPE:     Fermi-GBM Final Position
  RECORD_NUM:      0
  TRIGGER_NUM:     626247072
  GRB_RA:          244.500d {+16h 18m 00s} (J2000),
                   244.737d {+16h 18m 57s} (current),
                   243.932d {+16h 15m 44s} (1950)
  GRB_DEC:         +16.040d {+16d 02' 24"} (J2000),
                   +15.990d {+15d 59' 25"} (current),
                   +16.161d {+16d 09' 40"} (1950)
  GRB_ERROR:       1.00 [deg radius, statistical only]
  GRB_DATE:        19158 TJD;   310 DOY;   20/11/05
  GRB_TIME:        19867.76 SOD {05:31:07.76} UT
  GRB_PHI:          17.00 [deg]
  GRB_THETA:        92.00 [deg]
  E_RANGE:         44.032 - 279.965 [keV]
  LOC_ALGORITHM:   41731 (Gnd S/W Version number)
  SUN_POSTN:       221.40d {+14h 45m 36s}  -16.00d {-15d 59' 47"}
  SUN_DIST:         39.41 [deg]   Sun_angle= -1.6 [hr] (East of Sun)
  MOON_POSTN:      102.50d {+06h 50m 01s}  +24.87d {+24d 51' 59"}
  MOON_DIST:       125.00 [deg]
  MOON_ILLUM:      77 [%]
  GAL_COORDS:       30.95, 41.06 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      238.90, 36.77 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_lc_medres34_bn201105230.gif
  LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_locplot_all_bn201105230.png
  COMMENTS:        Fermi-GBM Final Position.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
  COMMENTS:        This notice was generated completely by automated pipeline processing.  
  COMMENTS:        Bright hard burst in the GBM.  
  COMMENTS:        This is likely a Long GRB.  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 05 Nov 20 19:46:02 UT
  NOTICE_TYPE:     Fermi-GBM Flight Position
  RECORD_NUM:      58
  TRIGGER_NUM:     626247072
  GRB_RA:          248.083d {+16h 32m 20s} (J2000),
                   248.317d {+16h 33m 16s} (current),
                   247.522d {+16h 30m 05s} (1950)
  GRB_DEC:         +17.017d {+17d 01' 00"} (J2000),
                   +16.974d {+16d 58' 25"} (current),
                   +17.122d {+17d 07' 19"} (1950)
  GRB_ERROR:       4.00 [deg radius, statistical plus systematic]
  GRB_INTEN:       1396 [cnts/sec]
  DATA_SIGNIF:     124.10 [sigma]
  INTEG_TIME:      4.096 [sec]
  GRB_DATE:        19158 TJD;   310 DOY;   20/11/05
  GRB_TIME:        19867.76 SOD {05:31:07.76} UT
  GRB_PHI:          20.00 [deg]
  GRB_THETA:        90.00 [deg]
  DATA_TIME_SCALE: 4.0960 [sec]
  HARD_RATIO:      0.45
  LOC_ALGORITHM:   3 (version number of)
  MOST_LIKELY:      88%  GRB
  2nd_MOST_LIKELY:   8%  Distant Particles
  DETECTORS:       0,0,0, 1,0,1, 0,0,0, 0,0,0, 0,0,
  SUN_POSTN:       221.40d {+14h 45m 36s}  -16.00d {-15d 59' 47"}
  SUN_DIST:         42.32 [deg]   Sun_angle= -1.8 [hr] (East of Sun)
  MOON_POSTN:      102.50d {+06h 50m 01s}  +24.87d {+24d 51' 59"}
  MOON_DIST:       126.52 [deg]
  MOON_ILLUM:      77 [%]
  GAL_COORDS:       33.79, 38.23 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      242.90, 38.42 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_lc_medres34_bn201105230.gif
  COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
  COMMENTS:        This trigger occurred at longitude,latitude = 222.12,20.42 [deg].  
  COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.  
  

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Thu 05 Nov 20 19:46:04 UT
  NOTICE_TYPE:     Fermi-GBM Ground Position
  RECORD_NUM:      4
  TRIGGER_NUM:     626247072
  GRB_RA:          243.500d {+16h 14m 00s} (J2000),
                   243.737d {+16h 14m 57s} (current),
                   242.932d {+16h 11m 44s} (1950)
  GRB_DEC:         +16.250d {+16d 15' 00"} (J2000),
                   +16.198d {+16d 11' 54"} (current),
                   +16.375d {+16d 22' 32"} (1950)
  GRB_ERROR:       1.00 [deg radius, statistical only]
  DATA_SIGNIF:     176.50 [sigma]
  DATA_INTERVAL:   12.288 [sec]
  GRB_DATE:        19158 TJD;   310 DOY;   20/11/05
  GRB_TIME:        19867.76 SOD {05:31:07.76} UT
  GRB_PHI:          16.00 [deg]
  GRB_THETA:        92.00 [deg]
  E_RANGE:         44.032 - 279.965 [keV]
  LOC_ALGORITHM:   41731 (Gnd S/W Version number)
  SUN_POSTN:       221.40d {+14h 45m 36s}  -16.00d {-15d 59' 47"}
  SUN_DIST:         39.02 [deg]   Sun_angle= -1.5 [hr] (East of Sun)
  MOON_POSTN:      102.50d {+06h 50m 01s}  +24.87d {+24d 51' 59"}
  MOON_DIST:       124.20 [deg]
  MOON_ILLUM:      77 [%]
  GAL_COORDS:       30.73, 42.03 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      237.68, 36.76 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_lc_medres34_bn201105230.gif
  POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_626247072.fits
  COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
  COMMENTS:        Bright hard burst in the GBM.  
  COMMENTS:        This is likely a Long GRB.  
  COMMENTS:        This Notice was ground-generated -- not flight-generated.  
  COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
  COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.  
  

• GCN Circular #28842
  B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
  The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 626247072 at 05:31:07 on 05 Nov. 2020 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60).
  The best-fit position (1 sigma statistical errors) is:

  RA(2000.0) = 247.4+/-0.4 deg
  Decl.(2000.0) = 12.6+/-0.5 deg
  

  We estimate an additional systematic error of 1 deg.
  Further details are available at: https://grb.mpe.mpg.de/grb/GRB201105230/
  The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB201105230/healpix
  The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB201105230/json
• GCN Circular #28843
  E. Bissaldi (Politecnico and INFN Bari) and S. Lesage (UAH) report on behalf of the Fermi GBM Team:
  "At 05:09:32.233 UT on 5 November 2020, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 201105B (trigger 626245777 / 201105215). The on-ground calculated location, using the GBM trigger data, is RA = 244.5, DEC = 16.0 (J2000 degrees, equivalent to 16h 18m, -16d 02'), with an uncertainty of 1.0 degrees (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a mixture of two Gaussians, one with a radius of 1.8 degrees (52% contribution) and one with a radius of 4.1 degrees (47% contribution) [A. Goldstein et al. 2020, ApJ, 895, 1] ).
  The angle from the Fermi LAT boresight at the GBM trigger time is 92 degrees.
  The GBM light curve shows a FRED emission episode with a duration (T90) of about 17 s (50-300 keV). The time-averaged spectrum from T0 to T0+23 s is best fit by a Band function with Epeak = 512 +/- 21 keV, alpha = -0.95 +/- 0.01, and beta = -2.35 +/- 0.09.
  The event fluence (10-1000 keV) in this time interval is (5.13 +/- 0.05)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+2.7 s in the 10-1000 keV band is 28.5 +/- 0.5 ph/s/cm^2.
  The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
  For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
• GCN Circular #28845
  C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), N. J. Klingler (PSU), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), T. Sakamoto (AGU), K. K. Simpson (PSU), M. Stamatikos (OSU),T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):
  At 2020-11-05 05:31:10 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 201105A (trigger=1004239). The burst occurred during GCN downtime, and the initial circular (Simpson et al.) may have been lost. We thus include information from that circular here as well.
  The GRB location is Sun-constrained until 2020-12-27, so no XRT or UVOT data are available.
  Using the data set from T-239 to T+963 sec from the recent telemetry downlink, the BAT ground-calculated position is RA, Dec = 245.610, 12.734 deg which is

     RA(J2000)  =  16h 22m 26.4s
     Dec(J2000) = +12d 44' 03.4"
  

  with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 60%
  The BAT mask-weighted light curve shows a FRED-like pulse that starts at ~T-3 s and peaks at ~T+1 s. The main structure ends at ~T+40 s, with a tail emission that lasts till ~T+100 s. T90 (15-350 keV) is 33.82 +- 4.03 sec (estimated error including systematics).
  The time-averaged BAT spectrum from T-2.85 to T+72.11 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.08 +- 0.03. The fluence in the 15-150 keV band is 1.2 +- 0.02 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+0.76 sec in the 15-150 keV band is 13.9 +- 0.5 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/1004239/BA/
  Burst Advocate for this burst is K. K. Simpson (kira.simpson1984 AT gmail.com). 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 Circular #28855
  

  TITLE:   GCN CIRCULAR
  NUMBER:  28855
  SUBJECT: Correction to GCN 28843: GBM report of GRB 201105B should have been GRB 201105A
  DATE:    20/11/06 16:07:49 GMT
  FROM:    Elisabetta Bissaldi at INFN,Bari  
  

  E. Bissaldi (Politecnico and INFN Bari) reports on behalf of the Fermi GBM Team:
  "The preliminary temporal and spectral analysis reported in GCN 28843 refer to trigger 626247072 / 201105230, detected by Fermi-GBM at 05:31:07.76 UT on 5 November 2020. This event was also detected by the Swift/BAT (Markwardt et al. 2020, GCN 28845). The GBM on-ground location, also reported in GCN 28843, is consistent with the Swift position.
  The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_skymap_all_bn201105230.png
  The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_healpix_all_bn201105230.fit
  The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2020/bn201105230/quicklook/glg_lc_medres34_bn201105230.gif
  For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
• GCN Circular #28864
  A. Ridnaia, S. Golenetskii, R. Aptekar, D. Frederiks, M. Ulanov, D. Svinkin, A. Tsvetkova, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, report:
  The long-duration GRB 201105A (Fermi-GBM detection: Biltzinger et al., GCN Circ. 28842, Bissaldi & Lesage, GCN Circ. 28843; Swift-BAT trigger #1004239: Markwardt et al., GCN Circ. 28845) triggered Konus-Wind at T0=19865.464 s UT (05:31:05.464).
  The burst light curve shows a single FRED-like pulse which starts at ~T0-2.4 s and has a total duration of ~29.6 s. The emission is seen up to ~4 MeV.
  The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB201105_T19865/
  As observed by Konus-Wind, the burst had a fluence of 7.88(-0.85,+0.79)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+2.624 s, of 1.59(-0.30,+0.30)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
  The time-averaged spectrum of the burst (measured from T0 to T0+26.368 s) is best fit in the 20 keV - 4 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.55(-0.12,+0.13), the high energy photon index beta = -2.11(-0.17,+0.11), the peak energy Ep = 286(-31,+42) keV (chi2 = 92/71 dof).
  The spectrum near the maximum count rate (measured from T0+2.304 to T0+4.096 s) is best fit in the 20 keV - 4 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.43(-0.18,+0.20), the high energy photon index beta = -2.05(-0.18,+0.12), the peak energy Ep = 305(-48,+66) keV (chi2 = 51/60 dof).
  All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.