From phys159@cantua.canterbury.ac.nz Wed Jul 12 10:27:59 2000 Date: Tue, 11 Jul 2000 22:51:18 +1200 (NZST) From: Karen Pollard Subject: PLANET team ANOMALY UPDATE: OGLE-2000-BUL-38 ------------------------------------------------ PLANET TEAM ANOMALY UPDATE FOR OGLE-2000-BUL-38 ------------------------------------------------ The PLANET collaboration has been monitoring the multiple-lens microlensing event OGLE-2000-BUL-38 from five observing sites distributed in longitude since it was first alerted as an anomalous event by the OGLE team. According to the OGLE data, this event executed a first caustic at around Heliocentric Julian Date (HJD)=2451707. Since then, the source light curve has declined and levelled out in the caustic trough. Recent data collected by PLANET now indicate that the light curve of the source has risen by about 0.15 magnitudes in the past two days and is likely to be rising from the caustic trough to a second caustic crossing. To date, PLANET do not have a firm prediction of when the second caustic crossing will occur, but urge further photometric monitoring of this anomalous event. Event: OGLE-2000-BUL-38 RA (J2000): 17:53:19.20 Dec (J2000): -29:57:33.9 The baseline I magnitude reported by the OGLE team is 17.87. PLANET continues to observe this event. Finding charts, previous alert information and updates can be found on the PLANET web site at http://www.astro.rug.nl/~planet. OGLE information on this event can be found at the OGLE alert web page at: http://www.astrouw.edu.pl/~ftp/ogle/ogle2/ews/2000/bul-38. ---------------------------------------------