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Real Time Gravitational Microlensing in OGLE experiment

ATel #16; Andrzej Udalski, Michal Szymanski (Warsaw Univ. Observatory)
on 7 May 1998; 13:06 UT
Credential Certification:

Subjects: Optical, Microlensing Event

Referred to by ATel #: 18, 27

A. Udalski and M. Szymanski, on behalf of the OGLE collaboration: The Early Warning System (EWS) designed for detection of microlensing events in progress has been implemented for the second phase of the Optical Gravitational Lensing Experiment - OGLE-2. Information about detected events in progress is available on WWW page and Anonymous FTP.
Astronomers interested in e-mail notification, are requested to send an e-mail to ogle-ews@sirius.astrouw.edu.pl. Short notes will also be posted at The Astronomer's Telegram page.

Each night about 25 million stars are monitored in the Galactic bulge with the 1.3-m Warsaw telescope at Las Campanas Observatory, Chile. Also large parts of the LMC and SMC are regularly observed. In the 1998 bulge season (Mar-Oct) 15 microlensing event candidates has already been detected. 5 of them are still in progress. The expected detection rate is about 50 microlensing events per observing season.