Gamma-ray Burst 220903A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN NOTICE
  

  TITLE:           GCN/FERMI NOTICE
  NOTICE_DATE:     Sat 03 Sep 22 18:42:37 UT
  NOTICE_TYPE:     Fermi-GBM Final Position
  RECORD_NUM:      0
  TRIGGER_NUM:     683900183
  GRB_RA:          177.320d {+11h 49m 17s} (J2000),
                   177.608d {+11h 50m 26s} (current),
                   176.686d {+11h 46m 45s} (1950)
  GRB_DEC:         -24.120d {-24d 07' 11"} (J2000),
                   -24.246d {-24d 14' 45"} (current),
                   -23.842d {-23d 50' 30"} (1950)
  GRB_ERROR:       3.91 [deg radius, statistical only]
  GRB_DATE:        19825 TJD;   246 DOY;   22/09/03
  GRB_TIME:        44178.17 SOD {12:16:18.17} UT
  GRB_PHI:         326.15 [deg]
  GRB_THETA:        85.52 [deg]
  E_RANGE:         50.000 - 300.000 [keV]
  LOC_ALGORITHM:   415 (Gnd S/W Version number)
  SUN_POSTN:       162.70d {+10h 50m 47s}   +7.35d {+07d 20' 45"}
  SUN_DIST:         34.78 [deg]   Sun_angle= -1.0 [hr] (East of Sun)
  MOON_POSTN:      249.78d {+16h 39m 07s}  -24.49d {-24d 29' 25"}
  MOON_DIST:        64.90 [deg]
  MOON_ILLUM:      51 [%]
  GAL_COORDS:      285.20, 36.60 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      187.71,-23.07 [deg] ecliptic lon,lat of the burst (or transient)
  LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220903511/quicklook/glg_lc_medres34_bn220903511.gif
  LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220903511/quicklook/glg_locplot_all_bn220903511.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 has human-in-the-loop processing.  
  

• GCN Circular #32534
  D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team,
  A. Goldstein, M. S. Briggs, and C. Wilson-Hodge on behalf of the Fermi GBM team,
  E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
  and
  S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report:
  The long-duration GRB 220903A has been detected by Fermi (GBM trigger 683900183), INTEGRAL (SPI-ACS), Konus-Wind, and Swift (BAT), so far, at about 44178 s UT (12:16:18). The burst was outside the coded field of view of the BAT.
  We have triangulated it to a preliminary, 3 sigma error box whose coordinates are:

    ---------------------------------------------
     RA(2000), deg                 Dec(2000), deg
    ---------------------------------------------
    Center:
     178.795 (11h 55m 11s) -29.705 (-29d 42' 17")
    Corners:
     176.905 (11h 47m 37s) -30.818 (-30d 49' 04")
     177.561 (11h 50m 15s) -31.150 (-31d 09' 02")
     180.605 (12h 02m 25s) -28.545 (-28d 32' 44")
     179.962 (11h 59m 51s) -28.232 (-28d 13' 54")
    ---------------------------------------------
  

  The error box area is 2.32 sq. deg, and its maximum dimension is 3.94 deg (the minimum one is 37.6 arcmin). The Sun distance was 39 deg.
  This box may be improved.
  The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final localization (glg_healpix_all_bn220903511_v01).
  A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB220903_T44175/IPN/
  The time history and spectrum will be given in forthcoming GCN Circulars.