Gamma-ray Burst 000730

On July 30, 2000 at 00:04:15 UT a burst was detected by Ulysses, Konus-Wind, and NEAR.

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN notice #758
  K. Hurley, on behalf of the Ulysses GRB team, T. Cline, on behalf of the Konus-Wind and NEAR GRB teams, and E. Mazets and S. Golenetskii, on behalf of the Konus Wind GRB team, report:
  Ulysses, Konus-Wind, and NEAR observed this burst at 00255 s UT. As observed by Ulysses, it had a duration ~7 s, a 25-100 keV fluence of ~4x10^-6 erg/cm^2, and a peak flux over 0.25 s of ~5x10^-7 erg/cm^2. We have localized this burst to a preliminary, 3 sigma error box whose area is ~ 240 sq. arcmin. and whose coordinates are:

      RA(2000)                 DEC(2000)
   12 h 45 m  8.31 s     19 o 16 '  17.74 "  (CENTER)
   12 h 45 m 13.88 s     19 o 19 '  46.69 "  (CORNER)
   12 h 43 m 26.15 s     19 o 42 '  56.58 "  (CORNER)
   12 h 46 m 49.33 s     18 o 49 '  33.39 "  (CORNER)
   12 h 45 m  2.74 s     19 o 12 '  48.83 "  (CORNER)
  

  This error box may be refined.
  
• GCN notice #772
  S. Sinha, P. sreekumar, K. kasturirangan, on behalf of SROSS C-2 (INDIAN GRB EXPERIMENT) team report:
  SROSS C-2 observed this burst at 1800.966 s UT (this time may be off by a few hundred ms). as observed by SROSS C-2, it had a duration (T90) of 0.352 secs (352 ms), a 20-1024 keV fluence (not corrected for the sec (theta) factor since we donot know its location) equal to 6.56.10-5 +- 2.18.10-6 ergs cm-2. The peak flux (256 ms) in 20-100 keV band is 8.81 photons cm-2 sec-1 and the peak flux (256 ms) in 100-1024 keV band is 9.85 photons cm-2 sec-1. The hardness ratio ((100-1024 keV)/(20-100 keV)) for this burst is equal to 0.47 +- 0.082.
• GCN notice #773
  S.Sinha, P.Sreekumar, K.Kasturirangan, on behalf of SROSS C-2 (INDIAN GRB EXPERIMENT) team report:
  The hardness ratios (during the peak of the bursts) for GRB000801 and GRB000730 were reported by us to be 0.27+-0.08 and 0.47 +-0.082 respectively. Our hardness ratio is defined as [counts(100-1024 keV)/counts(20-100 keV)].
  For twenty-one SROSS C-2 GRBs that are common with BATSE, we find the mean hardness ratio to be 0.97 +- 0.079 and the standard deviation of this distribution is 0.37. The hardness ratios for the GRB000801 (GCN 768) and GRB000730 (GCN 772) may be interpreted on the basis of above mentioned data.