Improving the Precision of Differential Photometry on a Determined Target Using SysRem

Details Improving the Precision of Differential Photometry on a Determined Target Using SysRem Improving the Precision of Differential Photometry on a Determined Target Using SysRem

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21340214w&link_type=abstract

American Astronomical Society, AAS Meeting #213, #402.14; Bulletin of the American Astronomical Society, Vol. 41, p.193

Astronomy and Astrophysics

Astronomy

Scientific paper

SysRem, a code for removal of systematic errors from large sets of light curves, was created (Tamuz et al. 2005) and widely used in photometric surveys for transiting exoplanets. In principle, each run of SysRem can find and remove one significant systematic effect, so that repeated runs can remove practically all the variations in all the light curves, including the sought for variations in a target object. We analyze possible modifications of SysRem that would allow for its application without affecting the variability of a determined target star. The examples of application of these algorithms to the transits of known exoplanets and to the light curves of variable stars will be demonstrated. This project was supported by the NSF/REU grant AST-0354056 and the Nantucket Maria Mitchell Association.

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