Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-02
Mon.Not.Roy.Astron.Soc. 331 (2002) L19
Astronomy and Astrophysics
Astrophysics
11 pages, 3 embedded ps figures including 2 colour, revised version accepted by MNRAS
Scientific paper
10.1046/j.1365-8711.2002.05374.x
Gravitational microlensing events of high magnification have been shown to be promising targets for detecting extrasolar planets. However, only a few events of high magnification have been found using conventional survey techniques. Here we demonstrate that high magnification events can be readily found in microlensing surveys using a strategy that combines high frequency sampling of target fields with online difference imaging analysis. We present 10 microlensing events with peak magnifications greater than 40 that were detected in real-time towards the Galactic Bulge during 2001 by MOA. We show that Earth mass planets can be detected in future events such as these through intensive follow-up observations around the event peaks. We report this result with urgency as a similar number of such events are expected in 2002.
Abe FR.
Bond Ian A.
Dodd Robert J.
Hearnshaw John B.
Kilmartin Pam M.
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