literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Optical identification of quasar 0917+7122 in the direction of an extreme-ultraviolet source

Sep, 1995
9 pages
Published in:
  • Astron.Astrophys. 308 (1996) 511
e-Print:
Report number:
  • WISE-95-09
View in:
pdf
reference search1 citation

Citations per year

19941995199601
Abstract: (arXiv)
We report the optical identification of an R=18.3R=18.3 mag, z=2.432z=2.432 quasar at the position of a 6 cm radio source and a faint \rosat PSPC X-ray source. The quasar lies within the error circles of unidentified extreme-UV (EUV) detections by the \euve and \rosat WFC all-sky surveys at ∼400\sim 400 \AA\ and ∼150\sim 150 \AA, respectively. A 21 cm H I emission measurement in the direction of the quasar with a 21′21'-diameter beam yields a total H I column density of NH=3.3×1020N_{H}=3.3\times 10^{20} cm−2^{-2}, two orders of magnitude higher than the maximum allowed for transparency through the Galaxy in the EUV. The source of the EUV flux is therefore probably nearby (\ltorder 100 pc), and unrelated to the quasar.