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An optical and X-ray study of the peculiar narrow-line quasar QSO 0117-2837
Stefanie Komossa, D. Grupe, V. Burwitz +1
We present an optical and X-ray study of the quasar QSO 0117-2837. It exhibits an interesting combination of optical and X-ray properties: Despite its extremely steep observed X-ra…
The enigmatic soft X-ray NLS1 RX J0134.2-4258
D. Grupe, K. M. Leighly, H. -C. Thomas +1
We report the discovery and analysis of the follow-up ROSAT pointed observation, an ASCA observation and optical and radio observations of the enigmatic Narrow-Line Seyfert 1 galax…
1E 0117.2-2837 and the NLR of Narrow-Line Seyfert 1 galaxies
S. Komossa, D. Grupe, M. Janek
Based on photoionization calculations we present a study of the NLR emission line ratios of Narrow-line Seyfert 1 (NLS1) galaxies. In particular, we investigate the influence of di…
Statistical Properties of Narrow-Line Seyfert 1 galaxies
Dirk Grupe
The number of publications considering Narrow-Line Seyfert 1 galaxies has increased dramatically in recent years. Especially after the launch of the X-ray missions ROSAT and ASCA,…
The enigmatic Soft X-ray AGN RX J0134.2--4258
D. Grupe, K. M. Leighly, H. -C. Thomas +1
We report the discovery and analysis of the follow-up ROSAT pointed observation, an ASCA observation and optical and radio observations of the enigmatic soft X-ray AGN RX J0134.2-4…