Gamma-ray Burst 190828D

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Wed 28 Aug 19 18:48:47 UT
  NOTICE_TYPE:    INTEGRAL Wakeup
  TRIGGER_NUM:    8364,   Sub_Num: 0
  GRB_RA:         251.9131d {+16h 47m 39s} (J2000),
                  252.2125d {+16h 48m 51s} (current),
                  251.1522d {+16h 44m 37s} (1950)
  GRB_DEC:        -24.5517d {-24d 33' 05"} (J2000),
                  -24.5854d {-24d 35' 06"} (current),
                  -24.4635d {-24d 27' 48"} (1950)
  GRB_ERROR:      3.10 [arcmin, radius, statistical only]
  GRB_INTEN:      9.41 [sigma]
  GRB_TIME:       67720.41 SOD {18:48:40.41} UT
  GRB_DATE:       18723 TJD;   240 DOY;   19/08/28
  SC_RA:          264.70 [deg] (J2000)
  SC_DEC:         -29.00 [deg] (J2000)
  SUN_POSTN:      157.01d {+10h 28m 02s}   +9.61d {+09d 36' 34"}
  SUN_DIST:        98.67 [deg]   Sun_angle= -6.3 [hr] (East of Sun)
  MOON_POSTN:     134.70d {+08h 58m 48s}  +19.44d {+19d 26' 33"}
  MOON_DIST:      122.32 [deg]
  GAL_COORDS:     356.16, 13.11 [deg] galactic lon,lat of the burst
  ECL_COORDS:     253.59, -2.14 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=10.0000 and Time_Error=10.0000.  
  COMMENTS:       Possibly real GRB event  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

   
  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Wed 28 Aug 19 18:49:19 UT
  NOTICE_TYPE:    INTEGRAL SPI ACS Trigger
  TRIGGER_NUM:    8364,   Sub_Num: 0
  GRB_INTEN:      9.59 [sigma]   
  GRB_TIME:       67712.20 SOD {18:48:32.20} UT
  GRB_DATE:       18723 TJD;   240 DOY;   19/08/28
  COMMENTS:       INTEGRAL SPI_ACS GRB Trigger.
  COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.
  COMMENTS:       The SPIACS lightcurve can be found at:
  COMMENTS:       ftp://isdcarc.unige.ch/arc/FTP/ibas/spiacs/2019-08/2019-08-28T18-48-32.0080-27780-23440-0.lc
  

• GCN NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Wed 28 Aug 19 19:49:04 UT
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    8364,   Sub_Num: 1
  GRB_RA:         251.9247d {+16h 47m 42s} (J2000),
                  252.2241d {+16h 48m 54s} (current),
                  251.1638d {+16h 44m 39s} (1950)
  GRB_DEC:        -24.5497d {-24d 32' 58"} (J2000),
                  -24.5834d {-24d 35' 00"} (current),
                  -24.4616d {-24d 27' 41"} (1950)
  GRB_ERROR:      2.38 [arcmin, radius, statistical only]
  GRB_INTEN:      9.59 [sigma]
  GRB_TIME:       67712.20 SOD {18:48:32.20} UT
  GRB_DATE:       18723 TJD;   240 DOY;   19/08/28
  SC_RA:            0.00 [deg] (J2000)
  SC_DEC:           0.00 [deg] (J2000)
  SUN_POSTN:      157.05d {+10h 28m 11s}   +9.59d {+09d 35' 41"}
  SUN_DIST:        98.64 [deg]   Sun_angle= -6.3 [hr] (East of Sun)
  MOON_POSTN:     135.35d {+09h 01m 24s}  +19.31d {+19d 18' 47"}
  MOON_DIST:      121.70 [deg]
  GAL_COORDS:     356.16, 13.10 [deg] galactic lon,lat of the burst
  ECL_COORDS:     253.60, -2.13 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=2.0000 and Time_Error=1.0000.  
  COMMENTS:       refined_coordinates_after_offline_analysis  
  

• GCN Circular #25528
  S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), E.Bozzo, C.Ferrigno, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report:
  a gamma ray burst lasting about 20 s has been detected by IBAS in the IBIS/ISGRI data at 18:48:30 UT of August 28, 2019.
  The refined coordinates (J2000) are:

  R.A.=   251.9247 deg
  DEC.=   -24.5498 deg
  

  with an uncertainty of 2.5 arcmin (90% c.l.).
  The burst had a peak flux of 0.7 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 7e-7 erg/cmq.
  A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
• GCN Circular #25576
  J. M. Yao, Y. G. Zheng, C. Cai, Q. Luo, S. Xiao, Q. B. Yi, Y. Huang, C. K. Li, G. Li, X. B. Li, J. Y. Liao, S. L. Xiong, C. Z. Liu, X. F. Li, Z. W. Li, Z. Chang, A. M. Zhang, Y. F. Zhang, X. F. Lu, C. L. Zou (IHEP), Y. J. Jin, Z. Zhang (THU), T. P. Li (IHEP/THU), F. J. Lu, L. M. Song, M. Wu, Y. P. Xu, S. N. Zhang (IHEP), report on behalf of the Insight-HXMT team:
  At 2019-08-28T18:48:33.70 (T0), Insight-HXMT/HE detected GRB 190828D (trigger ID: HEB190828783) in a routine search of the data, which was also triggered by INTEGRAL (GCN #25528).
  The Insight-HXMT/HE light curve mainly consists of multiple pulses with a duration (T90) of 5.21 s measured from T0+0.03 s. The 1-ms peak rate, measured from T0+0.03 s, is 4001 cnts/sec. The total counts from this burst is 5857 counts. URL_LC: http://www.hxmt.org/images/GRB/HEB190828783_lc.jpg
  All measurements above are made with the CsI detectors operating in the regular mode with the energy range of about 80-800 keV (deposited energy). Only gamma-rays with energy greater than about 200 keV can penetrate the spacecraft and leave signals in the CsI detectors installed inside of the telescope.
  Insight-HXMT is the first Chinese space X-ray telescope, which was funded jointly by the China National Space Administration (CNSA) and the Chinese Academy of Sciences (CAS). More information about it could be found at: http://www.hxmt.org.