Deep Chandra Observations of NGC 3115: Properties of Point Sources

Dacheng Lin, University of New Hampshire, Durham
Jimmy A. Irwin, University of Alabama - Tuscaloosa
Ka-Wah Wong, Minnesota State University Mankato
Aaron J. Romanowsky, San Jose State University
Jay Strader, Michigan State University
Gregory R. Sivakoff, University of Alberta


Our recent Chandra X-ray Visionary Project to observe the nearby S0 galaxy NGC3115 for 1 Msec has provided the deepest look to date of the low-mass X-ray binary (LMXB) population of a normal early-type galaxy. Here we report our study of the 450 point sources detected in these long observations, including many supersoft and highly variable sources. We compare the luminosity distribution of the LMXBs with those obtained from other galaxies. We also investigate their possible nature based on the spectral evolution and multiwavelength cross-correlation and matching with globular clusters.