An XMM-Newton Observation of the Seyfert 1 Galaxy 1h 0419-577 in an Extreme Low State (Paperback)

Previous observations of the luminous Seyfert 1 galaxy 1H 0419-577 have found its X-ray spectrum to range from that of a typical Seyfert 1 with 2-10 keV power law index Gamma approx. 1.9 to a much flatter power law of Gamma approx. 1.5 or less. We report here a new XMM-Newton observation which allows the low state spectrum to be studied in much greater detail than hitherto. We find a very hard spectrum (Gamma approx. 1.0), which exhibits broad features that can be modelled myth the addition of an extreme relativistic Fe K emission line or with partial covering of the underlying continuum by a substantial column density of near-neutral gas. Both the EPIC and RGS data show evidence for strong line emission of OVII and OVIII requiring an extended region of low density photoionised gas in 1H 0419-577. Comparison with an earlier XMM-Newton observation when 1H 0419-577 was 'X-ray bright' indicates the dominant spectral variability occurs via a steep power law component.

General

Imprint:	Bibliogov
Country of origin:	United States
Release date:	August 2013
First published:	August 2013
Authors:	K.A. Pounds
Creators:	Nasa Technical Reports Server (Ntrs) • et al
Dimensions:	246 x 189 x 2mm (L x W x T)
Format:	Paperback - Trade
Pages:	28
ISBN-13:	978-1-287-28328-7
Categories:	Books > Social sciences > Politics & government > General
LSN:	1-287-28328-4
Barcode:	9781287283287

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