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Anisotropic optical and X-ray emission in quasars

✍ Scribed by Jackson, N.; Browne, I. W. A.; Murphy, D. W.; Saikia, D. J.

Book ID
109758443
Publisher
Nature Publishing Group
Year
1989
Tongue
English
Weight
318 KB
Volume
338
Category
Article
ISSN
0028-0836

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## Abstract The first supersoft source (SSS) identification with an optical nova in M 31 was based on ROSAT observations. Twenty additional X‐ray counterparts (mostly identified as SSS by their hardness ratios) were detected using archival ROSAT, XMM‐Newton and Chandra observations obtained before