Quiescent X-ray/optical counterparts of the black hole transient H 1705-250
Abstract
We report the result of a new Chandra observation of the black hole X-ray transient H 1705-250 in quiescence. H 1705-250 was barely detected in the new ∼50 ks Chandra observation. With five detected counts, we estimate the source quiescent luminosity to be LX ∼ 9.1 × 1030 erg s-1 in the 0.5-10 keV band (adopting a distance of 8.6 kpc). This value is in line with the quiescent luminosities found among other black hole X-ray binaries with similar orbital periods. By using images taken with the Faulkes Telescope North, we derive a refined position of H 1705-250. We also present the long-term light curve of the optical counterpart from 2006 to 2012, and show evidence for variability in quiescence.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 2012
- DOI:
- 10.1111/j.1365-2966.2012.22119.x
- arXiv:
- arXiv:1210.2417
- Bibcode:
- 2012MNRAS.427.2876Y
- Keywords:
-
- X-rays: binaries;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 5 pages, 2 figures