Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000
Abstract
We describe observations carried out by the MOA group of the Galactic Bulge during 2000 that were designed to detect efficiently gravitational microlensing of faint stars in which the magnification is high and/or of short duration. These events are particularly useful for studies of extra-solar planets and faint stars. Approximately 17 degrees square were monitored at a sampling rate of up to 6 times per night. The images were analysed in real-time using a difference imaging technique. Twenty microlensing candidates were detected, of which 8 were alerted to the microlensing community whilst in progress. Approximately half of the candidates had high magnifications (>~10), at least one had very high magnification (>~50), and one exhibited a clear parallax effect. The details of these events are reported here, together with details of the on-line difference imaging technique. Some nova-like events were also observed and these are described, together with one asteroid.
Cite
@article{arxiv.astro-ph/0102181,
title = {Real-Time Difference Imaging Analysis of MOA Galactic Bulge Observations During 2000},
author = {I. A. Bond and F. Abe and R. J. Dodd and J. B. Hearnshaw and M. Honda and J. Jugaku and P. M. Kilmartin and A. Marles and K. Masuda and Y. Matsubara and Y. Muraki and T. Nakamura and G. Nankivell and S. Noda and C. Noguchi and K. Ohnishi and N. J. Rattenbury and M. Reid and To. Saito and H. Sato and M. Sekiguchi and J. Skuljan and D. J. Sullivan and T. Sumi and M. Takeuti and Y. Watase and S. Wilkinson and R. Yamada and T. Yanagisawa and P. C. M. Yock},
journal= {arXiv preprint arXiv:astro-ph/0102181},
year = {2009}
}
Comments
14 pages, 9 embedded postscript figures, 2 PNG figures, replaced with revised version accepted for publication in MNRAS, full resolution version available at http://www.phys.canterbury.ac.nz/~physib/papers