The EXPLORE Project: A Microlensing Search for Free-Floating Terrestrial-Mass Planets

Details The EXPLORE Project: A Microlensing Search for Free-Floating Terrestrial-Mass Planets The EXPLORE Project: A Microlensing Search for Free-Floating Terrestrial-Mass Planets

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.6601s&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #66.01; Bulletin of the American Astronomical Society, Vol. 33, p.1409

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Scientific paper

We describe and present preliminary results from our microlensing search for free-floating terrestrial-mass extrasolar planets. Using the MOSAIC II 36'x36' wide-field imager on the CTIO 4m telescope for 11 nights (6 clear) in June 2001, we followed a single field near the galactic plane (as part of an ongoing planet transit search). We monitored ~300,000 stars with I < 20, with 2.75 minute time sampling. The high time sampling allows us to detect fully resolved ~hour-long gravitational microlensing events caused by free-floating terrestrial-mass planets. This search is also sensitive to longer duration events from more massive free-floating planets. Although the expected event probability is low, this is a pilot study, and more telescope time will increase the detection probability.

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