Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21420102g&link_type=abstract
American Astronomical Society, AAS Meeting #214, #201.02; Bulletin of the American Astronomical Society, Vol. 41, p.709
Astronomy and Astrophysics
Astronomy
Scientific paper
We describe the DEdicated MONitor of EXotransits (DEMONEX), a dedicated, robotic, 20" telescope capable of obtaining precise photometry of bright (V<13) stars. Operating every clear night, DEMONEX's primary targets are stars with known transiting planets at times during primary transits and secondary eclipses. We demonstrate that DEMONEX can achieve relative photometry at the few millimagnitude level, and that with this photometric precision, we will be able to obtain (1) precision estimates of planetary parameters limited primarily by the uncertainty in the stellar mass, (2) measurements of the times of primary eclipses accurate to tens of seconds, resulting in sensitivity to additional companions in the systems with masses as low as a few times that of the Earth, (3) interesting constraints on the amount of reflected light and so albedo for favorable systems, and (4) sensitivity to additional transiting planets with radii greater than twice the radius of Earth. In addition, we will use DEMONEX to search for transits of known long-period radial velocity companions and follow up promising candidates from the KELT bright star transit survey.
Eastman Jason D.
Gaudi Scott B.
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