NOAO >   Observing Info >   Approved Programs >   2014A-0390

Small NOAO Logo

Proposal Information for 2014A-0390


PI: Joshua Bloom, UC Berkeley, profjsb@gmail.com
Address: Astronomy Department, 601 Campbell Hall, Berkeley, California 94720, United States

CoI: Tom Matheson, NOAO
CoI: Steve Ridgway, NOAO
CoI: Adam Miller, UC Berkeley
CoI: Christopher Klein, UC Berkeley
CoI: Lucianne Walkowicz, Princeton
CoI: Peter Nugent, Lawrence Berkeley National Laboratory
CoI: Isaac Shivvers, UC Berkeley
CoI: Chris Smith, NOAO
CoI: Knut Olsen, NOAO
CoI: Andrew Becker, U Washington
CoI: Dara Norman, NOAO
CoI: Rob Simcoe, MIT
CoI: Hakeem Oluseyi, Florida Institute of Technology
CoI: Susan Ridgway, NOAO
CoI: Abi Saha, NOAO
CoI: Joey Richards, UC Berkeley
CoI: S. Bradley Cenko, NASA Goddard
CoI: Tod R. Lauer, NOAO

Title: A Pilot DECam Time-Domain Survey

Abstract: We propose for additional nights to complete our previously approved \SSIZE sq. degree time-domain imaging survey (2013A-0400; PI Bloom), in z and Y-bands, focused on the discovery and characterization of intermediate timescale (< 5 day) Galactic variables. In our approved program, we proposed to systematically discover and classify sources across the variable star taxonomy at 3 different Galactic latitudes, an effort which will directly impact the planning and scheduling of LSST. Here \it we request an additional 3 nights, allowing us to complete the census for our mid- and high-latitude fields (we lost ~2.5 nights due to weather during 2013A) to achieve our original science goals, as well as to extend our variability census to sources with periods >2 days. We estimate that there are 3\times10^5 variables at >0.05 mag rms in the proposed survey. This proposed DECam survey should uncover more than 1000 RR Lyrae and, through their 3-d clustering, could reveal new galactic halo substructure out to 100 kpc. The resultant variability and probabilistic (machine-learned) classification catalogs of sources found this semester will be made public; rarities and novel sources would be prime candidates for community follow-up in subsequent semesters. We see the proposed survey as establishing a new concept of ``variability fields'' (akin to extragalactic fields such as COSMOS) in the Southern hemisphere: these may be well-studied for years at a variety of timescales across the electromagnetic spectrum.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2014A-0390

noaoprop-help@noao.edu

Small NOAO Logo