//////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 550 SUBJECT: BeppoSAX GRB000214 ("S. Valentine's day GRB") DATE: 00/02/14 05:21:06 GMT FROM: Luigi Piro at IAS/CNR Frascati For GRB lovers, on S. Valentine's day: On Feb.14 at 01:01:01 a GRB (GRB000214) has been detected by the GRBM and WFC1 of BeppoSAX. Preliminary coordinates from WFC are: R.A.(2000)= 283.573 DEC(2000)= -66.455 The attitude configuration at the time of the GRB introduces a systematic error in the position. At this stage of the analysis we estimate a total error of about 8' in radius. Luigi Piro BeppoSAX Mission Scientist //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 551 SUBJECT: GRB000214 refined BeppoSAX-WFC position DATE: 00/02/14 08:35:44 GMT FROM: Luigi Piro at IAS/CNR Frascati GRB000214 refined BeppoSAX-WFC position Refined coordinates from WFC are: R.A.(2000)= 283.576 DEC(2000)= -66.439 i.e. 1' off from the preliminary position The error radius is 6.5' A follow-up pointing with the Narrow Field Instruments of BeppoSAX is being planned Luigi Piro BeppoSAX Mission Scientist //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 552 SUBJECT: GRB000214: X-ray afterglow candidate DATE: 00/02/14 14:52:19 GMT FROM: Luigi Piro at IAS/CNR Frascati A BeppoSAX follow up of GRB000214 with the Narrow Field Instruments started around Feb.14 at 13:11 UT, i.e. 12 hours after the GRB. Preliminary analysis of the MECS (1.6-10 keV) data of the 1st orbit shows a relatively strong, previously unknown source inside the WFC error box at: R.A.(2000)= 283.61 DEC(2000)= -66.477 with an error radius of 1.5'. Luigi Piro BeppoSAX Mission Scientist //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 556 SUBJECT: IPN annulus for GRB000214 DATE: 00/02/15 06:28:24 GMT FROM: Kevin Hurley at UCBerkeley/SSL K. Hurley, on behalf of the Ulysses GRB team, and M. Feroci, on behalf of the BeppoSAX GRBM team, report: Ulysses and the BeppoSAX GRBM observed GRB000214 (GCN 551, 552). Triangulation gives an annulus centered at RA(2000)=153.560, Decl(2000)=-41.892, with radius 65.114 +/- 0.021 degrees (3 sigma). This annulus intersects the refined WFC error circle to make an ~30 sq. arcmin. error box whose corners are at: RA(2000) DEC(2000) 18 h 55 m 14.39 s -66 o 29 ' 35 " 18 h 53 m 34.70 s -66 o 21 ' 33 " 18 h 54 m 57.30 s -66 o 31 ' 31 " 18 h 53 m 19.47 s -66 o 23 ' 37 " It also intersects the NFI error circle, reducing its area by a factor of about 2, and making it likely that this is indeed the counterpart to GRB000214. Further refinement to this annulus is possible. A map may be viewed at ssl.berkeley.edu/ipn3/000214. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 557 SUBJECT: GRB000214: BeppoSAX GRBM and WFC Detection DATE: 00/02/15 13:22:43 GMT FROM: Angelo Antonelli at Obs. Astro. di Roma A. Paolino, M. Stornelli, A. Coletta, Scientific Operation Centre, Telespazio, Roma, L.A. Antonelli, Osservatorio Astronomico di Roma, Roma, M.J.S. Smith, J. in 't Zand, Space Research Organization Netherlands (SRON), Utrecht, C. Guidorzi, Universita' di Ferrara, Ferrara, M. Feroci IAS/CNR, Roma, report: "The BeppoSAX Gamma Ray Burst Monitor (GRBM) and Wide Field Camera (WFC unit 1) observed a gamma-ray burst on February 14.042 UT. A preliminary analysis reveals a duration of about 9 s in the GRBM, with a peak photon countrate of 4.2E3 cts/s in the 40-700 keV energy band. In the WFC, the duration is about 115 s and the peak flux is 2.9 Crab (2-26 keV). The position of the X-ray counterpart is R.A.= 18h 4m 18s Decl.= -66 26'.3" (equinox 2000.0) with a 99% error radius of 6.5'. An NFI follow-up is being carried on." This message is citable. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 559 SUBJECT: Correction to GCN 557 (GRB000214: BeppoSAX GRBM and WFC Detection) DATE: 00/02/15 17:27:20 GMT FROM: Angelo Antonelli at Obs. Astro. di Roma L.A. Antonelli, reports: the coordinate of the X-ray counterpart published in the GCN #557 should be read: R.A.= 18h 54m 18s Decl.= -66 26'.3" (equinox 2000.0). Thanks to D. Frail for pointing out this error. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 561 SUBJECT: GRB 000214 ``Valentine's Day Burst'': BeppoSAX NFI Observation DATE: 00/02/16 23:26:36 GMT FROM: Angelo Antonelli at Obs. Astro. di Roma L.A. Antonelli, Osservatorio Astronomico di Roma, Rome; L. Piro, Istituto di Astrofisica Spaziale, CNR, Rome; G. Tarei, G. Tassone, C. De Libero, M. Stornelli, D. Ricci, BeppoSAX Science Operations Center, Telespazio, Rome; M. Capalbi, M.R. Daniele, BeppoSAX Science Data Center, Rome; R.C. Butler, Agenzia Spaziale Italiana, Rome; J. Heise, Space Research Organization Netherlands, Utrecht; F. Frontera, Universita' di Ferrara, Ferrara; report: "GRB 000214 ``Valentine's Day Burst'' was observed with the Narrow Field Instruments (NFI) on board BeppoSAX from Feb. 14.5479 to 15.0793 UT (starting about 12 hrs after the burst trigger time). In the 2-10 keV image of all data from both MECS units 2 and 3, a fading point source ( 1SAX J185427-6627.5 ) is detected within the WFC error box (Paolino et al., GCN #557 and #559). The source position is R.A. = 18h54m27.0s, Decl. = -66d27'30" (Eq. 2000) with 50" error radius. In the first 20,000 s the source had a 2-10 keV flux of 5E-13 erg/cmE2/s and faded by a factor of two in the last 20,000 s. We conclude that 1SAX J185427-6627.5 is the X-ray afterglow of GRB 000214." This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 562 SUBJECT: GRB 000214, Radio Observations DATE: 00/02/18 18:15:12 GMT FROM: Dale A. Frail at NRAO R. Subrahmanyan, M.H. Wieringa, R.M. Wark, D. McConnell (ATNF), D. A. Frail (NRAO) and S. R. Kulkarni (Caltech) report: "We obtained a 8 hour integration with the Australia Telescope Compact Array (ATCA) centered on February 17.92 UT at 4.8 GHz and 8.6 GHz. Within the 50-arcsec radius of the NFI error circle (GCN 561), we find no radio sources above a 4-sigma level of 235 microJy." This message may be cited. //////////////////////////////////////////////////////////////////////// TITLE: GCN GRB OBSERVATION REPORT NUMBER: 564 SUBJECT: GRB 000214 near-IR observations DATE: 00/02/19 08:01:36 GMT FROM: James Rhoads at STScI James Rhoads (STScI), Andrew Wilson (U Maryland), Thaisa Storchi-Bergmann (UFRGS), and Andrew Fruchter (STScI) report: We observed the field of GRB 000214 in the K' (2.1 micron) filter on February 15.392 and on February 17.410 using the CTIO 4m Blanco Telescope + OSIRIS imager, with net integration times of 180 seconds and 384 seconds respectively. Both epochs covered the entire BeppoSAX NFI error circle (Antonelli et al, GCNC 561). We find no convincingly variable sources down to an approximate first epoch 5 sigma limiting point source magnitude of K' = 18.15, or 34 microJansky (calibrated by observation of the standard star S071-D). Assuming a normal, unobscured afterglow spectral index (in the range -0.65 to -1.25 for f_nu) implies a corresponding flux limit of 8 to 17 microJansky at 0.7 micron, or roughly R=21. The approximate 5 sigma point source limit for the second epoch is K' = 19.1.