A ROSAT observation of the high-redshift galaxy IRAS F10214 + 4724

A. Lawrence, D. Rigopoulou, M. Rowan-Robinson, R. G. McMahon, T. Broadhurst, C. J. Lonsdale

Research output: Contribution to journalArticlepeer-review

Abstract

A 20-ks ROSAT observation of the extremely luminous IRAS galaxy IRAS 10214+4724 shows a very weak X-ray source, significant only at about 2 sigma. This immediately refutes the hypothesis that F10214 + 4724 is simply a quasar with modest line-of-sight reddening, as we would then have expected thousands of counts. The X-ray absorbing column, assuming solar abundances, required to reduce the (redshifted) N 3-keV emission to that expected from a normal quasar is about 5 x 10 exp 23/sq cm. We compare the overall energy distribution of F10214 + 4724 with that of NGC 1068. The optical-UV-X-ray emission is very closely similar to that of the type 2 Seyfert nucleus of NGC 1068, but the IR-mm spectrum is a good match to that of the starburst ring. It seems very likely that F10214 + 4724, like NGC 1068, is a composite object.
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Volume266
DOIs
Publication statusPublished - 1 Jan 1994

Keywords

  • Rosat Mission
  • Red Shift
  • Active Galaxies
  • X Ray Astronomy
  • Infrared Sources (Astronomy)
  • Starburst Galaxies
  • X Ray Sources
  • Ultraviolet Radiation
  • Spectral Energy Distribution

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