Gamma-ray Burst 181205A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Wed 05 Dec 18 08:41:43 UT
  NOTICE_TYPE:    INTEGRAL Wakeup
  TRIGGER_NUM:    8173,   Sub_Num: 1
  GRB_RA:         199.9679d {+13h 19m 52s} (J2000),
                  200.2052d {+13h 20m 49s} (current),
                  199.3411d {+13h 17m 22s} (1950)
  GRB_DEC:         +8.2136d {+08d 12' 49"} (J2000),
                   +8.1146d {+08d 06' 53"} (current),
                   +8.4758d {+08d 28' 33"} (1950)
  GRB_ERROR:      3.00 [arcmin, radius, statistical only]
  GRB_INTEN:      10.34 [sigma]
  GRB_TIME:       31297.71 SOD {08:41:37.71} UT
  GRB_DATE:       18457 TJD;   339 DOY;   18/12/05
  SC_RA:          191.00 [deg] (J2000)
  SC_DEC:           3.11 [deg] (J2000)
  SUN_POSTN:      251.74d {+16h 46m 57s}  -22.37d {-22d 22' 28"}
  SUN_DIST:        58.95 [deg]   Sun_angle= 3.4 [hr] (West of Sun)
  MOON_POSTN:     229.02d {+15h 16m 04s}  -13.22d {-13d 13' 17"}
  MOON_DIST:       35.69 [deg]
  GAL_COORDS:     323.84, 69.92 [deg] galactic lon,lat of the burst
  ECL_COORDS:     195.23, 15.40 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=1.2799 and Time_Error=8.0000.  
  COMMENTS:       Possibly real GRB event  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:          GCN/INTEGRAL NOTICE
  NOTICE_DATE:    Wed 05 Dec 18 09:30:33 UT
  NOTICE_TYPE:    INTEGRAL Offline
  TRIGGER_NUM:    8173,   Sub_Num: 2
  GRB_RA:         199.9535d {+13h 19m 49s} (J2000),
                  200.1908d {+13h 20m 46s} (current),
                  199.3267d {+13h 17m 18s} (1950)
  GRB_DEC:         +8.1974d {+08d 11' 51"} (J2000),
                   +8.0984d {+08d 05' 54"} (current),
                   +8.4596d {+08d 27' 35"} (1950)
  GRB_ERROR:      1.50 [arcmin, radius, statistical only]
  GRB_INTEN:      10.34 [sigma]
  GRB_TIME:       31297.71 SOD {08:41:37.71} UT
  GRB_DATE:       18457 TJD;   339 DOY;   18/12/05
  SC_RA:          191.00 [deg] (J2000)
  SC_DEC:           3.11 [deg] (J2000)
  SUN_POSTN:      251.78d {+16h 47m 06s}  -22.38d {-22d 22' 44"}
  SUN_DIST:        58.99 [deg]   Sun_angle= 3.4 [hr] (West of Sun)
  MOON_POSTN:     229.45d {+15h 17m 48s}  -13.35d {-13d 21' 07"}
  MOON_DIST:       36.12 [deg]
  GAL_COORDS:     323.78, 69.91 [deg] galactic lon,lat of the burst
  ECL_COORDS:     195.22, 15.38 [deg] ecliptic lon,lat of the burst
  COMMENTS:       INTEGRAL GRB Coordinates.  
  COMMENTS:       Time_Scale=1.2799 and Time_Error=8.0000.  
  COMMENTS:       refined_coordinates_after_offline_analysis  
  

• GCN Circular #23512
  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 60 s has been detected by IBAS in the IBIS/ISGRI data at 8:41 UT of December 5, 2018.
  The refined coordinates (J2000) are:

  R.A.= 199.9536 deg
  DEC.=   8.1975 deg
  

  with an uncertainty of 1.5 arcmin (90% c.l.).
  The burst had a peak flux of 0.8 counts/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 2e-6 erg/cmq.
  A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html