TITLE: GCN GRB OBSERVATION REPORT NUMBER: 474 SUBJECT: SAX J2303.2+0015: an x-ray/GRB? DATE: 99/12/17 17:04:32 GMT FROM: Giangiacomo Gandolfi at IAS/CNR Frascati J.M. Muller and E. Kuulkers, SRON, Utrecht, G. Tarei and L. Di Ciolo, BeppoSAX Scientific Operation Centre, Telespazio, Roma, L. Amati, TESRE/CNR, Bologna, C. Guidorzi, Universita' di Ferrara, G. Gandolfi, IAS/CNR, Roma, report: The BeppoSAX Wide Field Camera (WFC unit 2) observed a new fast x-ray transient (SAX J2303.2+0015) on December 17.17496 UT. The duration was about 35 s and the peak flux was about 0.6 Crab (2-26 keV) in a 1 second time bin. No significant signal was detected in the GRBM (40-700 keV). The high galactic latitude of the x-ray transient and the high hardness ratio found in a quick-look analysis, may suggest a faint and x-ray rich GRB. The position of the source is R.A. = 23h03m15s Decl. = +0d14'.93 (equinox 2000.0) with an estimated error radius of 4.5'. No catalogued x-ray objects were found within a radius of 10 arcmin. Note that at this point we cannot exclude an additional systematic position error due to ongoing tests with the satellite startrackers.