Quiescent X-ray/optical counterparts of the black hole transient H 1705-250

Y. J. Yang, A. K.H. Kong, Dave Russell, F. Lewis, R. Wijnands

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Pages (from-to)2876-2880
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume427
Issue number4
DOIs
StatePublished - Dec 21 2012

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luminosity
erg
light curve
x rays
telescopes
orbitals
estimates

Keywords

  • Binaries
  • X-rays

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Quiescent X-ray/optical counterparts of the black hole transient H 1705-250. / Yang, Y. J.; Kong, A. K.H.; Russell, Dave; Lewis, F.; Wijnands, R.

In: Monthly Notices of the Royal Astronomical Society, Vol. 427, No. 4, 21.12.2012, p. 2876-2880.

Research output: Contribution to journalArticle

Yang, Y. J. ; Kong, A. K.H. ; Russell, Dave ; Lewis, F. ; Wijnands, R. / Quiescent X-ray/optical counterparts of the black hole transient H 1705-250. In: Monthly Notices of the Royal Astronomical Society. 2012 ; Vol. 427, No. 4. pp. 2876-2880.
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