Nicer Observation of the Supersoft X-Ray Binary CAL 83
Abstract
Intriguing modulation of supersoft X-ray flux on timescales clustering either around half an hour or 1 minute have been discovered in white dwarfs that are burning hydrogen in an accreted shell, either after a nova outburst, or in a semi-steady mode in other supersoft X-ray sources. I will discuss the possible root causes) of these modulations and present new high quality timing data obtained with the NICER (Neutron Stars Interior Composition Explorer Mission) payload on the International Space Station. I will also connect the timing data with the evidence obtained with high resolution X-ray spectra with the XMM-Newton and Chandra grating spectrographs.
- Publication:
-
Compact White Dwarf Binaries
- Pub Date:
- September 2019
- Bibcode:
- 2019cwdb.confE..20L