The BeppoSAX observation of IRAS 20210+1121

Ueno, S.; Ward, M.J.; O'Brien, P.T.; Stirpe, G.M.; Matt, G.

Abstract

We have obtained a hard X-ray spectrum of the ultraluminous infrared galaxy IRAS 20210+1121 (z = 0.056), whose optical spectrum is that of a Seyfert 2. The most significant feature is a strong Fe K line at 6.7 (6.5–7.0) keV in the rest-frame with equivalent width about 1 keV. This suggests that the observed X-ray continuum is scattered emission from a completely blocked AGN, a situation similar to that in NGC 1068. However, IRAS 20210+1121 has an observed 2–10 keV luminosity of 4 × 1042 erg s−1 (assuming H0 = 50km s−1 Mpc−1), about ten times higher than NGC 1068. If the scattering efficiencies of NGC 1068 and IRAS 20210 are similar, then this implies the presence of an extremely luminous X-ray source in IRAS 20210.

Citation

Ueno, S., Ward, M., O'Brien, P., Stirpe, G., & Matt, G. (1999). The BeppoSAX observation of IRAS 20210+1121. Nuclear Physics B - Proceedings Supplements, 69(1-3), 554-557. https://doi.org/10.1016/s0920-5632%2898%2900287-4

• Journal Article Type: Article
• Publication Date: 1999-01
• Journal: Nuclear Physics B - Proceedings Supplements
• Print ISSN: 0920-5632
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 69
• Issue: 1-3
• Pages: 554-557
• DOI: https://doi.org/10.1016/s0920-5632%2898%2900287-4