TITLE: RXTE_ASM TRANSIENT RAPID POSITION NOTICE REF_NUM: 7 NOTICE_TYPE: Crossed_Scan NOTICE_DATE/TIME: Mon Dec 21 20:14:25 GMT 1998 TRANS_TIME: 15789 SOD {04:23:09} UT TRANS_DATE: 10997 TJD; 184 DOY; 98/07/03 TRANS_RXTE_ASM_RA: 359.778d (J2000) TRANS_RXTE_ASM_DEC: +8.565d (J2000) TRANS_RXTE_ASM_CORNER1: 359.754d +8.486d (J2000) TRANS_RXTE_ASM_CORNER2: 359.649d +8.421d (J2000) TRANS_RXTE_ASM_CORNER3: 359.804d +8.648d (J2000) TRANS_RXTE_ASM_CORNER4: 359.909d +8.713d (J2000) TRANS_RXTE_ASM_ERROR: 0.197 [deg radius, 90%, stat + sys] TRANS_RXTE_ASM_INTEN: 373 [mCrab] COMMENTS: COMMENTS: TIME SINCE EVENT: 247191 minutes COMMENTS: COMMENTS: This alert is generated by two crossed lines of position COMMENTS: with a very high level of confidence for localizing a COMMENTS: real uncatalogued x-ray transient or gamma-ray burst. COMMENTS: Optical counterparts to GRBs have NEVER been observed COMMENTS: less than a few hours after the event. We claim no COMMENTS: ownership of any results that follow from this report. COMMENTS: We'd like to encourage you to take advantage of this COMMENTS: opportunity to make the next big discovery. COMMENTS: COMMENTS: Below are quanities to aid in evaluating this alert. COMMENTS: Values of chi-sq. less than 1.15 and S/N > 6.0 are good COMMENTS: indicators of a strong, real detection. COMMENTS: COMMENTS: Chi-sq. 1.055561 and 1.111373 COMMENTS: S/N ratio 15.575792 and 23.570447 COMMENTS: COMMENTS: The following comments should help indicate whether or not COMMENTS: this alert was spawned by the detection of a GRB. They are COMMENTS: not definitive, but we are confident that there *will* be COMMENTS: something new of Astronomical interest in this error box. COMMENTS: COMMENTS: Event time is consistent with BATSE trigger 6891 COMMENTS: COMMENTS: SSC 0: No short-term variability detected in ASM MTS data. COMMENTS: SSC 1: Short-time-scale variability detected in ASM MTS data! COMMENTS: No known bright/variable source is in the FOV. COMMENTS: COMMENTS: A record of ASM Crossed-box alerts is kept at COMMENTS: http://xte.mit.edu/crossbox/ COMMENTS: Please check there for sky maps and time-series data. COMMENTS: Please report any results as soon as possible via the COMMENTS: GCN circulars and any other means you see fit to use. COMMENTS: If you have no immediate means of distributing your COMMENTS: results, feel free to call Don Smith at home: COMMENTS: (617) 720-1612 or at work: (617) 258-8108 for assistance.