Gamma-ray Burst 171011A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Oct 17 18:33:17 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     778154,   Seg_Num: 0
  GRB_RA:          236.761d {+15h 47m 03s} (J2000),
                   237.003d {+15h 48m 01s} (current),
                   236.079d {+15h 44m 19s} (1950)
  GRB_DEC:         -10.071d {-10d 04' 14"} (J2000),
                   -10.125d {-10d 07' 28"} (current),
                    -9.917d {-09d 55' 00"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       4436 [cnts]    Image_Peak=368 [image_cnts]
  TRIGGER_DUR:     0.256 [sec] 
  TRIGGER_INDEX:   123     E_range: 25-100 keV
  BKG_INTEN:       74966 [cnts]
  BKG_TIME:        66756.17 SOD {18:32:36.17} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        18037 TJD;   284 DOY;   17/10/11
  GRB_TIME:        66767.18 SOD {18:32:47.18} UT
  GRB_PHI:         -79.64 [deg]
  GRB_THETA:        22.05 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     40.86 [sigma]
  IMAGE_SIGNIF:    14.59 [sigma]
  MERIT_PARAMS:     +1  +0  +0  -2  +2  +3 -100  +0 -77  +0 
  SUN_POSTN:       197.19d {+13h 08m 46s}   -7.30d {-07d 18' 02"}
  SUN_DIST:         39.43 [deg]   Sun_angle= -2.7 [hr] (East of Sun)
  MOON_POSTN:       99.28d {+06h 37m 08s}  +19.55d {+19d 33' 16"}
  MOON_DIST:       138.17 [deg]
  MOON_ILLUM:      59 [%]
  GAL_COORDS:      357.87, 33.48 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      236.81,  9.62 [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 = 295.88,-5.60 [deg].  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

   
  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Wed 11 Oct 17 18:33:34 UT 
  NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
  TRIGGER_NUM:    7941,   Sub_Num: 0
  GRB_INTEN:      9.79 [sigma]
  GRB_TIME:       66765.42 SOD {18:32:45.42} UT
  GRB_DATE:       18037 TJD;   284 DOY;   17/10/11
  COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
  COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
  COMMENTS:
  COMMENTS:       NOTE: This SPIACS event is temporally(2.0<100sec) coincident with the SWIFT_BAT event (trignum=778154).
  COMMENTS:
  COMMENTS:       The SPIACS lightcurve can be found at:
  COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2017-10/2017-10-11T18-32-45.2455-16917-56208-0.lc 
  

• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Wed 11 Oct 17 18:36:44 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     778154,   Seg_Num: 0
  GRB_RA:          236.761d {+15h 47m 03s} (J2000),
                   237.003d {+15h 48m 01s} (current),
                   236.079d {+15h 44m 19s} (1950)
  GRB_DEC:         -10.071d {-10d 04' 14"} (J2000),
                   -10.125d {-10d 07' 28"} (current),
                    -9.917d {-09d 55' 00"} (1950)
  GRB_DATE:        18037 TJD;   284 DOY;   17/10/11
  GRB_TIME:        66767.18 SOD {18:32:47.18} UT
  TRIGGER_INDEX:   123
  GRB_PHI:         -79.64 [deg]
  GRB_THETA:        22.05 [deg]
  DELTA_TIME:      19.00 [sec]
  TRIGGER_DUR:     0.256 [sec] 
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     40.86 [sigma]
  IMAGE_SIGNIF:    14.59 [sigma]
  LC_URL:          sw00778154000msb.lc
  SUN_POSTN:       197.19d {+13h 08m 47s}   -7.30d {-07d 18' 05"}
  SUN_DIST:         39.43 [deg]   Sun_angle= -2.7 [hr] (East of Sun)
  MOON_POSTN:       99.32d {+06h 37m 17s}  +19.55d {+19d 33' 16"}
  MOON_DIST:       138.14 [deg]
  MOON_ILLUM:      59 [%]
  GAL_COORDS:      357.87, 33.48 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      236.81,  9.62 [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 = 295.88,-5.60 [deg].  
  

  
• GCN Circular #21993
  J.D. Gropp (PSU), J. R. Cummings (NASA/UMBC), J. A. Kennea (PSU), A. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL) and B. Sbarufatti (PSU) report on behalf of the Swift Team:
  At 18:32:47 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 171011A (trigger=778154). Swift could not slew to the burst due to the Sun observing constraint. The BAT on-board calculated location is RA, Dec 236.761, -10.071 which is

     RA(J2000) = 15h 47m 03s
     Dec(J2000) = -10d 04' 14"
  

  with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single peak structure with a duration of about 5 sec. The peak count rate was ~10,000 counts/sec (15-350 keV), at ~0 sec after the trigger.
  Due to a Sun observing constraint, Swift cannot slew to the BAT position until 11:46 UT on 2018 January 03. There will thus be no XRT or UVOT data for this trigger before this time.
  Burst Advocate for this burst is J.D. Gropp (jdg44 AT psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
• GCN Circular #21994
  V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, D.Kuvshinov, A.V.Krylov, I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU
  D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory
  R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias
  R.Podesta, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA), National University of San Juan, Argentina
  H. Levato, C. Saffe Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE), San Juan, Argentina
  O.Gres, K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk, Irkutsk State University
  V.Yurkov, Yu.Sergienko Blagoveschensk Educational State University, Blagoveschensk
  A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory
  MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in SAAO was pointed to the GRB171011A 34 sec after notice time and 273 sec after trigger time at 2017-10-11 18:37:20 UT. On our first (50s exposure) set we not found optical transient within SWIFT error-box (ra=236.758 dec=-10.0703 r=0.1) brighter then 17.7.
  The observations made on zenit distance = 80 degrees, galaxy latitude b = 33 degree. The moon (59 % bright part) below the horizon (The altitude of the Moon is -51 degree ). The sun altitude is -23.4 degree. The error box can be observed till sunrise at 2017-10-12 03:59:47.
  This message can be cited.
• GCN Circular #21996
  Klotz A., Noysena.K., Atteia J.L. (CNRS-OMP-IRAP), Boer, M., Eymar, L. (CNRS-ARTEMIS), Gendre B. (UVI - Etelman Obs.) report:
  We imaged the field of GRB 171011A detected by SWIFT (trigger 778154) with the TAROT robotic telescope (D=25cm) located at the Calern observatory, France.
  The observations started 41.5s after the GRB trigger (12.6s after the notice). The elevation of the field decreased from 7 degrees above horizon and weather conditions were good.
  The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). We do not detect any OT with a limiting magnitude of: t0+41.5s to t0+101.5s : Rlim = 16.3
  The second image is 30.0s exposure in tracking mode: t0+114.1s to t0+144.1s : Rlim = 16.6
  We co-added a series of exposures: t0+114.1s to t0+405.3s : Rlim = 17.4
  Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction.
• GCN Circular #22006
  J. R. Cummings (CPI), S. D. Barthelmy (GSFC), J.D. Gropp (PSU), H. A. Krimm (NSF/USRA), A. Y. Lien (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-119 to T+54 sec from the recent telemetry downlink, we report further analysis of BAT GRB 171011A (trigger #778154) (Gropp et al., GCN Circ. 21993). The BAT ground-calculated position is RA, Dec = 236.766, -10.064 deg which is

    RA(J2000)  =  15h 47m 03.7s
    Dec(J2000) = -10d 03' 50.2"
  

  with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 63%.
  The mask-weighted light curve shows a single-peaked light curve that starts and peaks at ~ T0, and ends at ~ T+3 s. T90 (15-350 keV) is 2.27 +- 0.24 sec (estimated error including systematics).
  The time-averaged spectrum from T-0.06 to T+2.74 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.68 +- 0.08. 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+0.08 sec in the 15-150 keV band is 7.0 +- 0.4 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/778154/BA/