SIMBAD references

2008ApJ...681..982G - Astrophys. J., 681, 982-997 (2008/July-2)

XMM-Newton observations of the narrow-line Seyfert 1 galaxy Mrk 335 in a historical low X-ray flux state.

GRUPE D., KOMOSSA S., GALLO L.C., FABIAN A.C., LARSSON J., PRADHAN A.K., XU D. and MINIUTTI G.

Abstract (from CDS):

We report the discovery of strong soft X-ray emission lines and a hard continuum above 2 keV in the narrow-line Seyfert 1 galaxy Mrk 335 during an extremely low X-ray flux state. Mrk 335 was observed for 22 ks by XMM-Newton in 2007 July as a Target of Opportunity to examine it in its X-ray low flux state, which was discovered with Swift. Long-term light curves suggest that this is the lowest flux state this AGN has ever been seen in. However, Mrk 335 is still sufficiently bright that its X-ray properties can be studied in detail. The X-ray continuum spectrum is very complex and requires several components to model. Statistically, partial covering and blurred reflection models work well. We confirm the presence of a strong narrow Fe line at 6.4 keV. High-resolution spectroscopy with the XMM-Newton RGS reveals strong, soft X-ray emission lines not detected in previous, higher signal-to-noise ratio, XMM-Newton observations, such as highly ionized Fe lines, O VII, and Ne IX and Mg XI lines. The optical/UV fluxes are similar to those previously measured with Swift. Optical spectroscopy taken in 2007 September does not show any changes to optical spectra obtained 8 years earlier.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - galaxies: individual (Mrk 335) - Galaxies: Seyfert - Ultraviolet: Galaxies - X-Rays: Galaxies

Nomenclature: Table 2: [GKG2008] N (Nos 1-5).

Simbad objects: 19

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2020.09.30-02:25:05

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