Two candidates radio-quiet millisecond pulsars in Fermi unassociated sources
Abstract
Multi-wavelength observations have been the key to identifying the many unassociated gamma-ray sources detected by the Fermi-LAT telescope. In two of the top ten brightest Fermi sources that remain unassociated, optical observations of their error ellipses have revealed variable stars each coincident with an X-ray source detected by Swift. In both cases, a putative binary orbital period of has been identified from the optical variability, indicating that these are candidate millisecond pulsars (MSPs) that may be the counterparts to the bright gamma-ray sources. However, unlike all previous gamma-ray MSPs detected by Fermi, there is no indication of radio emission from either source.
- Publication:
-
XMM-Newton Proposal
- Pub Date:
- October 2013
- Bibcode:
- 2013xmm..prop..104A
- Keywords:
-
- White Dwarf Binaries;
- Neutron Star Binaries;
- Cataclysmic Variables;
- ULXs;
- Black Holes;
- 2FGL J1120.0-22