//////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 672 SUBJECT: IPN triangulation of GRB000519 DATE: 00/05/19 21:12:03 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB Team, S. Barthelmy, on behalf of the GCN GRB team, F. Frontera, C. Guidorzi and E. Montanari, on behalf of the BeppoSAX GRBM team, and T. Cline, on behalf of the NEAR GRB team, report: Ulysses, BATSE, the BeppoSAX GRBM, and NEAR observed this burst at 29885 s UT. (BATSE Trigger #8111). As observed by Ulysses, it had a duration ~15 s, and a 25-100 keV fluence 3x10^-6 erg/cm^2. We have triangulated it to a preliminary 100 sq. arcmin. error box whose 3 sigma coordinates are: RA(2000) DEC(2000) 23 h 4 m 38.55 s 1 o 10 ' 16.67 " (CENTER) 23 h 5 m 9.33 s 1 o 12 ' 58.16 " (CORNER) 23 h 4 m 25.46 s 1 o 2 ' 54.25 " (CORNER) 23 h 4 m 51.59 s 1 o 17 ' 39.60 " (CORNER) 23 h 4 m 7.73 s 1 o 7 ' 35.67 " (CORNER) This error box can be refined. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 673 SUBJECT: GRB000519, BVRI field photometry DATE: 00/05/21 17:47:17 GMT FROM: Arne A. Henden at USNO/USRA A. Henden (USRA/USNO) reports on behalf of the USNO GRB team: We have acquired preliminary BVRcIc all-sky photometry for an 11x11 arcmin field that covers the majority of the error box for GRB000519 with the USNOFS 1.0-m telescope on one photometric night. Stars brighter than V=13 are saturated and should be used with care. We have placed the photometric data on our anonymous ftp site: ftp://ftp.nofs.navy.mil/pub/outgoing/aah/grb/grb000519.dat The current photometry has a potential external zero-point error of about two percent. The astrometry in this file is based on linear plate solutions with respect to USNO-A2.0. The internal errors are less than 100mas. Further calibration of this field will be performed if an optical afterglow is identified. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 679 SUBJECT: GRB000519: Optical observations DATE: 00/05/30 13:25:21 GMT FROM: Brian Lindgren Jensen at U.of Copenhagen B. L. Jensen, H. Pedersen, J. Hjorth (U. of Copenhagen), J. Gorosabel (DSRI, Copenhagen), T. H. Dall, J. P. U. Fynbo (U. of Aarhus) and S. O'Toole (U. of Sydney), report on behalf of a larger European collaboration: "We have obtained images covering about 95% of the 100 sq. arcmin error box reported by Hurley et al. (GCN #672) with the 2.56-m Nordic Optical Telescope (+ALFOSC, mosaic of 5 pointings) on La Palma, and the 1.54-m Danish Telescope (+DFOSC) at La Silla, as follows: Telescope Date Filter/Exp FWHM NOT 2000 May 20.17 UT (t+20h) R: 180-360 s 1.5" DK-1.54m 2000 May 20.39 UT (t+25h) R: 4x240 s 1.7" DK-1.54m 2000 May 25.37 UT (t+6d) R: 3x300 s 3.5" Observations were hampered by moonlight. Using the photometry provided by Henden (GCN #673), we obtain limiting magnitudes of R~20.8 for the NOT, and R~21.0 for the DK-1.5m May 20 image. The exposures have been compared internally, and with the DSS-II (red) exposure. No candidate counterpart was found."