Computer Science – Performance
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547201j&link_type=abstract
American Astronomical Society, AAS Meeting #215, #472.01; Bulletin of the American Astronomical Society, Vol. 42, p.518
Computer Science
Performance
Scientific paper
The Dispersed Fixed-Delay Interferometer (DFDI) is a Michelson interferometer coupled to a spectrograph designed for precision differential Doppler velocity measurements. Two Exoplanet Trackers (ET) using the DFDI technique have been hunting for exoplanets in U.S.: the multiple objects version, ``MARVELS", is working on the Sloan 2.5 meter telescope at Apache Point Observatory; the high precision version, ``EXPERT", is working on the 2.1 meter telescope at Kitt Peak National Observatory. Forward modeling plays a key role in the design of any new scientific instrument, and is especially important when the instrument is the first of its kind. Although our instruments are already on site, we still need forward modeling to aid us studying their performance and finally improving precision of measurements by updating current instruments and building new ones. Work is now underway to produce an end-to-end model of ``MARVELS" and ``EXPERT". Key ingredients include accurate modelings of the Michelson interferometer, the post spectrograph and the camera. Forward modeling can also be used to develop and test data reduction strategies. And it can be used to extract radial velocities by comparing the simulated images with observed images directly. In this poster, we present our preliminary results on forward modeling of ``MARVELS" and ``EXPERT" and its potential applications. We acknowledge support from W.M. Keck Foundation, NSF, SDSS-III consortium, NASA, UCF-UF SRI program and UF.
Ge Jian
Jiang Peng
Lee Bowon
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