TITLE: RXTE_ASM TRANSIENT RAPID POSITION NOTICE REF_NUM: 4 NOTICE_TYPE: Crossed_Scan NOTICE_DATE/TIME: Mon Dec 21 19:48:05 GMT 1998 TRANS_TIME: 877 SOD {00:14:37} UT TRANS_DATE: 10972 TJD; 159 DOY; 98/06/08 TRANS_RXTE_ASM_RA: 267.102d (J2000) TRANS_RXTE_ASM_DEC: -28.423d (J2000) TRANS_RXTE_ASM_CORNER1: 267.235d -28.311d (J2000) TRANS_RXTE_ASM_CORNER2: 267.480d -28.257d (J2000) TRANS_RXTE_ASM_CORNER3: 266.963d -28.540d (J2000) TRANS_RXTE_ASM_CORNER4: 266.718d -28.593d (J2000) TRANS_RXTE_ASM_ERROR: 0.378 [deg radius, 90%, stat + sys] TRANS_RXTE_ASM_INTEN: 360 [mCrab] COMMENTS: COMMENTS: TIME SINCE EVENT: 283413 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. 1.067146 and 1.188992 COMMENTS: S/N ratio 8.504648 and 11.052585 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: BATSE reports no recent GRB trigger. COMMENTS: COMMENTS: SSC 2: No short-term variability detected in ASM MTS data. COMMENTS: SSC 2: No short-term variability detected in ASM MTS data. 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.