Progress on the Baker Observatory Sub-minute Survey

Details Progress on the Baker Observatory Sub-minute Survey Progress on the Baker Observatory Sub-minute Survey

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733408r&link_type=abstract

American Astronomical Society, AAS Meeting #217, #334.08; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

The Baker Observatory Sub-minute Survey is designed to look for phenomena with short-period variability. Typical exposure times are under 15 seconds, surveying a magnitude range of 10-13 in white light. Known short-period phenomena include pulsating subdwarf B stars, white dwarfs, rapidly oscillating Ap stars and Delta Scuti stars. Currently, most sky surveys are interested in observing the entire sky and as such, the temporal cadence is best suited for variations of several hours or longer. Our survey observes single fields for four hour spans on two separate (non-adjacent) nights. During Phase I of our survey, we have selected 40 fields which contain at least one known variable star. It is then a blind study to determine if we can recover the known variable and search for new variables within each field. Observations for Phase I are nearly complete and we are enhancing our procedures and detection algorithms to optimize sensitivity to variations over many time scales. Our data are excellent for detecting variability shorter than two hours, even down to amplitudes of a millimagnitude (depending on S/N). This material is based upon work supported by the National Science Foundation under Grant No. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. This work was partially funded by the Missouri Space Grant Consortium, funded by NASA and Missouri State University.

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