Multi-band Analysis of A Neutron Star Ultra-Compact X-ray Binary with A Possible 614 Second Orbital Period
Abstract
We present X-ray, optical and radio data to analyse a previously unnoticed X-ray source . We argue it is probably the most compact neutron star X-ray binary so far. It has a periodic variability at 614.28s(probability of false alarm about 3.5e-4). Its spectrum is an absorbed 1.8 keV-blackbody with an iron-line feature. It has a Lx about 1.2×1034×(D/10 kpc)2 erg s-1 and no obvious optical counterpart(fx/fo larger than 1600). Its radio data indicate a positive spectral index. More observations can verify the 10.4-min orbital period.
- Publication:
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43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1209G