THIS FILE CHANGES WITH TIME -- HIT THE RELOAD BUTTON NOW! ///////////////////////////////////////////////////////////////////// GRB 980515 17:00:10 UT SOD=61210 sec TJD=10948 DOY=135 BATSE did not see this burst. ///////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 72 SUBJECT: BeppoSAX GRB ALERT: updated position of grb980515 DATE: 98/05/16 01:20:13 GMT FROM: Marco Feroci at IAS/CNR Frascati GB980515 Luigi Piro and Marco Feroci on behalf of the BeppoSAX team report: A GRB (GB980515) was observed by the BeppoSAX GRBM at about 17:00:10 UT of May 15. The event was detected by one of the WFC (WFC2). The updated WFC position is: RA(2000)=319.518 Dec(2000)=-67.249 The error radius is still of 5'. A further refinement of the WFC position should be available next Monday. The BeppoSAX follow-up with the NFI should start around 2 AM UT of May 16. ///////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 73 SUBJECT: GRB980515: SAX-WFC updated position DATE: 98/05/18 22:38:00 GMT FROM: Marco Feroci at IAS/CNR Frascati Marco Feroci and Jean in 't Zand on behalf of the BeppoSAX Mission Scientist report: The BeppoSAX-WFC position of GRB980515 has been revised using the Final Observing Tape. The revised burst position is: R.A. = 319.3527 (21h 17m 25s), Decl. = -67.2550 (-67o 15' 18") Eq. 2000.0 We give an error radius of 4 arcmin. This is somewhat larger than the usual 3 arcmin because of low statistics of the burst. This position lies at 3.8 arcmin from the latest distributed position, and 2.6 arcmin from the first distributed position. ///////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 77 SUBJECT: GRB980515, BeppoSAX IAUC to be submitted DATE: 98/05/19 22:57:51 GMT FROM: Marco Feroci at IAS/CNR Frascati Marco Feroci on behalf of the BeppoSAX team reports the following submission to the IAU Circulars: GRB 980515 M. Feroci and L. Piro, Istituto Astrofisica Spaziale, CNR, Rome; M.R. Daniele, G. Gennaro, S. Rebecchi, and G. Celidonio, BeppoSAX Science Operation Center, Rome; L.A. Antonelli, BeppoSAX Science Data Center, Rome; and J. Heise, Space Research Organization of the Netherlands, Utrecht, report: "The BeppoSAX Wide Field Camera error box of GRB 980515 was observed with the BeppoSAX Narrow Field Instruments (NFI) starting on May 16.1178 UT (10 hr after the burst). A previously unknown x-ray source, 1SAX J2116.8-6712, was detected by the MECS (units 2 and 3) at R.A. = 21h16m49s, Decl. = -67o11'.8 (equinox 2000.0; preliminary error radius 1'.5 due to the poor statistical quality). This position is 4'.9 from the centroid of the WFC position (GCN #73). The source 1SAX J2116.8-6712 exhibits a moderate variability over the two-day NFI observation. There is no clear evidence for a monotonic decaying behaviour. The average countrate was 0.0026 +/- 0.0006 count/s (2-10 keV) in the two MECS units, corresponding to (1.6 +/- 0.4) x 10E-13 erg cmE-2 sE-1 (assuming a Crab-like energy spectrum). At this time 1SAX J2116.8-6712 is the only candidate as the x-ray afterglow of GRB 980515". ///////////////////////////////////////////////////////////////////// Circular No. 6909 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only) GRB 980515 M. Feroci and L. Piro, Istituto Astrofisica Spaziale, CNR, Rome; M. R. Daniele, G. Gennaro, S. Rebecchi, and G. Celidonio, BeppoSAX Science Operation Center, Rome; L. A. Antonelli, BeppoSAX Science Data Center, Rome; and J. Heise, Space Research Organization of the Netherlands, Utrecht, report: "The BeppoSAX Wide Field Camera error box of GRB 980515 was observed with the BeppoSAX Narrow Field Instruments (NFI) starting on May 16.1178 UT (10 hr after the burst). A previously unknown x-ray source, 1SAX J2116.8-6712, was detected by the MECS instruments (units 2 and 3) at R.A. = 21h16m49s, Decl. = -67o11'.8 (equinox 2000.0; preliminary error radius 1'.5 due to the poor statistical quality). This position is 4'.9 from the centroid of the WFC position (GCN 73). The source 1SAX J2116.8-6712 exhibits a moderate variability over the two-day NFI observation. There is no clear evidence for a monotonic decaying behavior. The average count rate was 0.0026 +/- 0.0006 count/s (2-10 keV) in the two MECS units, corresponding to (1.6 +/- 0.4) x 10E-13 erg cmE-2 sE-1 (assuming a Crab-like energy spectrum). At this time, 1SAX J2116.8-6712 is the only candidate for the x-ray afterglow of GRB 980515." (C) Copyright 1998 CBAT 1998 May 20 (6909) Daniel W. E. Green ///////////////////////////////////////////////////////////////////// Circular No. 6910 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only) GRB 980515 R. Ricci and G. D'Andreta, BeppoSAX Science Operation Center, Rome; E. Costa and P. Soffitta, IAS; J. in 't Zand, SRON; J. M. Muller, BeppoSAX Science Data Center and SRON; L. Nicastro, Istituto di Fisica Cosmica ed Applicazioni dell'Informatica, CNR, Palermo; and E. Palazzi, ITESRE, report: "The position of GRB 980515, observed by the BeppoSAX Gamma-Ray Burst Monitor and Wide Field Camera (WFC, unit 2) on May 15.708495 UT, has been refined by off-line data analysis. The final position is R.A. = 21h17m25s, Decl. = -67o15'.3 (equinox 2000.0), with an error radius of 4'. The event duration was about 15 s in gamma-rays (in the energy band 40-700 keV), with a peak intensity of 450 counts/s. The peak intensity in the WFC (in the energy band 2-28 keV) was about 1.5 Crab. The source 1SAX J2116.8-6712 (IAUC 6909) is therefore positionally consistent with GRB 980515." (C) Copyright 1998 CBAT 1998 May 20 (6910) Daniel W. E. Green