2 papers
astro-ph2008
The Brightest Serendipitous X-ray Sources in ChaMPlane
Kyle Penner, Maureen van den Berg, JaeSub Hong +3
The Chandra Multiwavelength Plane (ChaMPlane) Survey is a comprehensive effort to constrain the population of accretion-powered and coronal low-luminosity X-ray sources (L_X < 10^3…
astro-ph1999
Optical spectroscopy of X-ray sources in the old open cluster M67
Maureen van den Berg, Frank Verbunt, Robert D. Mathieu
We have obtained optical spectra of seven stars in the old galactic cluster M67 that are unusual sources of X-rays, and investigate whether the X-ray emission is due to magnetic ac…