TITLE: GCN CIRCULAR NUMBER: 8200 SUBJECT: Swift Trigger 324116 is known source again DATE: 08/09/08 07:57:53 GMT FROM: Hans Krimm at NASA-GSFC H. A. Krimm (CRESST/GSFC/USRA), N. Gehrels (NASA/GSFC), E. A. Hoversten (PSU), J. Mao (INAF-OAB), J. P. Osborne (U Leicester), J. L. Racusin (PSU), M. Stamatikos (NASA/ORAU), G. Tagliaferri (INAF-OAB), E. Troja (INAF-IASFPA) and L. Vetere (PSU) report on behalf of the Swift Team: At 07:12:44 UT, the Swift Burst Alert Telescope (BAT) triggered and located an excess (trigger=324116). Swift slewed immediately to the position. The BAT on-board calculated location is RA, Dec 280.572, -11.411 which is RA(J2000) = 18h 42m 17s Dec(J2000) = -11d 24' 38" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). This position is consistent with the known transient SWIFT J1842.5-1124 (Krimm et al. ATEL #1610 and GCN #8199). The XRT position is consistent with the previously reported position to within 4.6 arcsec. Thus, this trigger is the known source and not a GRB. This is the second trigger on this source tonight. Burst Advocate for this burst is H. A. Krimm (krimm AT milkyway.gsfc.nasa.gov). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.)