Gamma-ray Burst 190701B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Mon 01 Jul 19 10:05:12 UT
  NOTICE_TYPE:    INTEGRAL Wakeup
  TRIGGER_NUM:    8320,   Sub_Num: 1
  GRB_RA:         350.4105d {+23h 21m 39s} (J2000),
                  350.6229d {+23h 22m 29s} (current),
                  349.8686d {+23h 19m 28s} (1950)
  GRB_DEC:        +64.3461d {+64d 20' 46"} (J2000),
                  +64.4532d {+64d 27' 12"} (current),
                  +64.0718d {+64d 04' 19"} (1950)
  GRB_ERROR:      2.60 [arcmin, radius, statistical only]
  GRB_INTEN:      23.16 [sigma]
  GRB_TIME:       36304.69 SOD {10:05:04.69} UT
  GRB_DATE:       18665 TJD;   182 DOY;   19/07/01
  SC_RA:          357.48 [deg] (J2000)
  SC_DEC:          62.62 [deg] (J2000)
  SUN_POSTN:      100.13d {+06h 40m 31s}  +23.11d {+23d 06' 34"}
  SUN_DIST:        77.19 [deg]   Sun_angle= 7.3 [hr] (West of Sun)
  MOON_POSTN:      80.38d {+05h 21m 32s}  +20.75d {+20d 45' 16"}
  MOON_DIST:       71.25 [deg]
  GAL_COORDS:     113.40,  3.15 [deg] galactic lon,lat of the burst
  ECL_COORDS:      34.41, 58.84 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=20.0000 and Time_Error=20.0000.  
  COMMENTS:       Possibly real GRB event  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Mon 01 Jul 19 10:08:11 UT
  NOTICE_TYPE:    INTEGRAL Refined
  TRIGGER_NUM:    8320,   Sub_Num: 2
  GRB_RA:         350.4091d {+23h 21m 38s} (J2000),
                  350.6215d {+23h 22m 29s} (current),
                  349.8672d {+23h 19m 28s} (1950)
  GRB_DEC:        +64.3481d {+64d 20' 53"} (J2000),
                  +64.4552d {+64d 27' 19"} (current),
                  +64.0738d {+64d 04' 26"} (1950)
  GRB_ERROR:      2.55 [arcmin, radius, statistical only]
  GRB_INTEN:      32.04 [sigma]
  GRB_TIME:       36316.34 SOD {10:05:16.34} UT
  GRB_DATE:       18665 TJD;   182 DOY;   19/07/01
  SC_RA:          357.48 [deg] (J2000)
  SC_DEC:          62.62 [deg] (J2000)
  SUN_POSTN:      100.13d {+06h 40m 32s}  +23.11d {+23d 06' 33"}
  SUN_DIST:        77.19 [deg]   Sun_angle= 7.3 [hr] (West of Sun)
  MOON_POSTN:      80.41d {+05h 21m 39s}  +20.76d {+20d 45' 31"}
  MOON_DIST:       71.26 [deg]
  GAL_COORDS:     113.40,  3.15 [deg] galactic lon,lat of the burst
  ECL_COORDS:      34.41, 58.84 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=0.3199 and Time_Error=8.0000.  
  COMMENTS:       Possibly real GRB event  
  

• GCN NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Mon 01 Jul 19 11:08:32 UT
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    8320,   Sub_Num: 3
  GRB_RA:         350.4091d {+23h 21m 38s} (J2000),
                  350.6215d {+23h 22m 29s} (current),
                  349.8672d {+23h 19m 28s} (1950)
  GRB_DEC:        +64.3456d {+64d 20' 44"} (J2000),
                  +64.4527d {+64d 27' 10"} (current),
                  +64.0713d {+64d 04' 17"} (1950)
  GRB_ERROR:      1.10 [arcmin, radius, statistical only]
  GRB_INTEN:      32.04 [sigma]
  GRB_TIME:       36316.34 SOD {10:05:16.34} UT
  GRB_DATE:       18665 TJD;   182 DOY;   19/07/01
  SC_RA:          357.48 [deg] (J2000)
  SC_DEC:          62.62 [deg] (J2000)
  SUN_POSTN:      100.17d {+06h 40m 42s}  +23.11d {+23d 06' 23"}
  SUN_DIST:        77.21 [deg]   Sun_angle= 7.3 [hr] (West of Sun)
  MOON_POSTN:      81.03d {+05h 24m 08s}  +20.84d {+20d 50' 37"}
  MOON_DIST:       71.45 [deg]
  GAL_COORDS:     113.40,  3.15 [deg] galactic lon,lat of the burst
  ECL_COORDS:      34.41, 58.84 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=0.3199 and Time_Error=8.0000.  
  COMMENTS:       refined_coordinates_after_offline_analysis  
  

• GCN Circular #24936
  D.Gotz (CEA, Saclay), S.Mereghetti (INAF, IASF-Milano), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report:
  a gamma ray burst lasting about 23 s has been detected by IBAS in the IBIS/ISGRI data at 10:04:58 UT of July 1st, 2019.
  The refined coordinates (J2000) are:

  R.A.= 350.4091 deg
  DEC.= +64.3457 deg
  

  with an uncertainty of 1.1 arcmin (90% c.l.).
  The burst had a peak flux of 0.1 photons/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 5.e-8 erg/cm2.
  A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
• GCN Circular #24979
  A. Tsvetkova, S. Golenetskii, R.Aptekar, D. Frederiks, M. Ulanov, D. Svinkin, A. Lysenko, A. Kozlova and T. Cline on behalf of the Konus-Wind team, report:
  The long-duration GRB 190701B (IBAS detection: Gotz et al., GCN 24936) triggered Konus-Wind at T0=36303.292 s UT (10:05:03.292).
  The burst light curve shows a multi-peaked structure which starts at ~T0-3.3 s and has a total duration of ~13 s. The emission is seen up to ~1.3 MeV.
  As observed by Konus-Wind, the burst had a fluence of 3.51(-0.46,+0.70)x10^-6 erg/cm2, and a 64-ms peak energy flux, measured from T0-0.072 s, of 1.39(-0.63,+0.68)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
  The time-integrated spectrum of the burst (measured from T0 to T0+16.640 s) is best fit in the 20 keV - 1.3 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with  alpha = -1.43(-0.33,+0.41), and Ep = 112(-30,+64) keV (chi2 = 48/60 dof). Fitting by the GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.17 (chi2 = 48/59 dof).
  The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB190701_T36303/
  All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.