//////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 754 SUBJECT: IPN localization of GRB000727 DATE: 00/07/28 18:15:17 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB team, E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team, and T. Cline, on behalf of the NEAR and Konus-Wind GRB teams, report: Ulysses, Konus-Wind, and NEAR detected this burst at 70956 s UT. As observed by Ulysses, it had a duration of ~10 s, a 25-150 keV fluence of 2.6 x 10^-6 erg/cm^2, and a peak flux over 0.5 s of 4.3 x 10^-6 erg/cm^2 s^-1. We have localized it to a preliminary 3 sigma error box whose area is ~25 sq. arcmin. and whose coordinates are: RA(2000) DEC(2000) 11 h 45 m 10.54 s 17 o 24 ' 34.44 " (CENTER) 11 h 45 m 14.07 s 17 o 25 ' 11.88 " (CORNER) 11 h 44 m 35.46 s 17 o 31 ' 24.63 " (CORNER) 11 h 45 m 45.47 s 17 o 17 ' 43.53 " (CORNER) 11 h 45 m 7.01 s 17 o 23 ' 56.99 " (CORNER) This error box can be refined. (NOTE: Ulysses and NEAR have had very high background rates for the past several weeks due to solar protons, which explains the the recent decrease in the IPN event rate. Both instruments have now returned to their normal background rates.) //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 755 SUBJECT: GRB 000727, optical observations DATE: 00/07/29 20:08:47 GMT FROM: Arne A. Henden at USNO/USRA A. Henden (USRA/USNO) reports on behalf of the USNO GRB team: We have imaged the entire IPN error box (Hurley, et al. GCN 754) for GRB 000727 with the NOFS 1.0-m telescope with a Tektronix 2048x2048 CCD and Cousins R filter. Conditions were marginal with poor seeing, bright sky and light cirrus. Compared against the POSS-II red plate, we reach approximately the same depth. Only one, very marginal, object appears on our frame but does not appear on the POSS-II scan. This object is likely just a red star, but is reported here for completeness. The J2000 coordinates and USNO-A2.0 red magnitude are: 11:45:26.90 +17:22:20.9 20.7 +/- 0.3 The magnitude is based on the bright star just to the south at J2000 position and USNO-A2.0 red magnitude of: 11:45:27.84 +17:21:33.1 15.70 A 4.5x4.5 arcmin finding chart for this object is embarrassingly given at: ftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb000727.jpg