Open AccessThe University of New South Wales Extrasolar Planet Search: methods and first results from a field centred on NGC 6633
Author(s) -
Hidas M. G.,
Ashley M. C. B.,
Webb J. K.,
Irwin M.,
Phillips A.,
Toyozumi H.,
Derekas A.,
Christiansen J. L.,
Nutto C.,
Crothers S.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09061.x
Subject(s) - physics , exoplanet , photometry (optics) , planet , astronomy , astrophysics , binary number , stars , open cluster , telescope , radial velocity , transit (satellite) , public transport , arithmetic , mathematics , political science , law
We report on the current status of the University of New South Wales Extrasolar Planet Search project, giving details of the methods we use to obtain millimagnitude precision photometry using the 0.5‐m Automated Patrol Telescope. We use a novel observing technique to optimally broaden the point spread function and thus largely eliminate photometric noise due to intrapixel sensitivity variations on the CCD. We have observed eight crowded Galactic fields using this technique during 2003 and 2004. Our analysis of the first of these fields (centred on the open cluster NGC 6633) has yielded 49 variable stars and four shallow transit candidates. Follow‐up observations of these candidates have identified them as eclipsing binary systems. We use a detailed simulation of our observations to estimate our sensitivity to short‐period planets, and to select a new observing strategy to maximize the number of planets detected.