Optical Studies of 15 Hard X-Ray Selected Cataclysmic Binaries
Optical Studies of 15 Hard X-Ray Selected Cataclysmic Binaries
Abstract We conducted time-resolved optical spectroscopy and/or time-series photometry of 15 cataclysmic binaries that were discovered in hard X-ray surveys by the Swift Burst Alert Telescope and the International Gamma-Ray Astrophysics Laboratory , with the goal of measuring their orbital periods and searching for spin periods. Four of the objects …