NOAO >   Observing Info >   Approved Programs >   2015A-0145

# Program Information for 2015A-0145

PI: Francois Dufour, McGill University, dufourf@physics.mcgill.ca
Address: Department of Physics, 3600 Rue University, Montreal, Quebec H3A 2T8 Canada

CoI: Robert E Rutledge, McGill University

Title: A Continued Survey of Unclassified ROSAT-BSC Sources for qLMXB Candidates

Abstract: X-ray spectroscopic measurements of the thermal emission of neutron stars in quiescent low-mass X-ray binaries (qLMXBs) are one of only three methods to constrain the equation of state of cold nuclear matter. Up to now, this method has been limited in its application to qLMXBs within globular clusters, due to the high distance uncertainty of qLMXBs in the field. Gaia parallax measurements will soon allow the use of field qLMXBs with sufficiently bright optical counterparts in this key test of physics. We propose to continue a survey, started in semester 2014B, of unclassified \emph{ROSAT} BSC sources for H$\alpha$ excess, a tell-tale sign of accretion disks, in order to select qLMXB candidates for X-ray followup.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2015A):  CT-0.9m/CFIM -- 6n on Feb 21 - Feb 26 2015
Run 3 (2015A):  KP-0.9m/HDI -- 7n on Apr 20 - Apr 26 2015

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 >   2015A-0145