NOAO >   Observing Info >   Approved Programs >   2018A-0058

Small NOAO Logo

Program Information for 2018A-0058


PI: Paula Szkody, U. of Washington, szkody@astro.washington.edu
Address: Astronomy Department, Box 351580, Seattle, WA 98195 USA

CoI: David Buckley, SAAO
CoI: John Thorstensen, Dartmouth College
CoI: Stephen Potter, SAAO
CoI: Thomas Kupfer, California Institute of Technology

Title: Targeting Candidate Cataclysmic Variables in Current Transient Surveys

Abstract: We propose to continue our LCO followup program begun last semester of photometry and spectroscopy of newly discovered candidate cataclysmic variables (CVs) in current optical sky surveys (CRTS, MASTER, ASAS-SN), with particular emphasis on low luminosity, short period dwarf novae that have infrequent outbursts, related period bouncers and systems containing highly magnetic white dwarfs. These objects are crucial for understanding the nature of close binary evolution, particularly at the shortest orbital periods (60-90 min). In addition, the rare but important class of double-degenerate systems, potential progenitors of Type Ia SN are also potential candidates from these surveys. The primary goals are to obtain spectra to confirm the CV nature and delineate the object types, and obtain light curves to find the orbital periods, an essential key parameter to determine the evolutionary status. We need to accumulate large numbers to test population model predictions for angular momentum loss and evolution. We request further data for new objects continuously appearing in the surveys, using 3 hr continuous photometry (in g and r) for 2-3 objects/ month and spectra of about 4/month throughout the semester. We use larger telescope access by the PI and CoIs at APO, MDM, Caltech and SAAO to accomplish radial velocities of the most interesting targets determined by LCO. The next semester is especially important as ZTF commissioning will start in Nov while the main public survey will begin in Jan 2018, adding large numbers of candidates each month.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  LCO-2m/FLOYDS -- 12hrs


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 >   2018A-0058

noaoprop-help@noao.edu

Small NOAO Logo