NOAO >   Observing Info >   Approved Programs >   2011A-0432

Small NOAO Logo

Proposal Information for 2011A-0432


PI: Christopher T. Britt, LSU, chrisbritt86@gmail.com
Address: Physics Department, Nicholson Hall, Baton Rouge, LA 70803, USA

CoI: Robert I. Hynes, LSU
CoI: Peter Jonker, SRON, NL
CoI: Gijs Nelemans, Radboud University, NL
CoI: Danny Steeghs, University of Warwick, UK
CoI: Tom Maccarone, University of Southampton, UK
CoI: Cees Bassa, University of Manchester, UK
CoI: Valerie Mikles, LSU
CoI: Lauren Gossen, LSU
CoI: James Clem, LSU

Title: Photometric Calibration and Bright Variables in the Chandra Galactic Bulge Survey

Abstract: The Galactic Bulge Survey has identified ~1700 faint X-ray sources in the Galactic Bulge. As the fields lie above and below the main body of Galactic plane extinction, these objects are also accessible optically. Approximately 1200 have identified optical counterparts with a manageable degree of crowding. We expect most to be interacting binaries including 400 mostly quiescent low-mass X-ray binaries. We have obtained time-resolved optical photometry of these objects using Mosaic-II in order to measure orbital periods and identify high inclination, especially eclipsing, objects. We propose to observe standards with the Y4KCam on the CTIO 1.0m to calibrate magnitudes of stars we have observed with Mosaic-II. Additionally, 238 candidate sources were bright enough to saturate on the Mosaic-II run, so using the wide field of view on the Y4KCam will be an ideal opportunity to recover variability in the optically bright end of the population, removing a selection effect against bright objects and allowing us to perform useful observations in non-photometric time. There is an excellent likelihood that this project will lead to identification of the first dynamically confirmed Galactic eclipsing black hole binary.


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 >   2011A-0432

noaoprop-help@noao.edu

Small NOAO Logo