Xmm−newton Observation of the Nls1 Galaxy Ark 564: I. Spectral Analysis of the Time-average Spectrum
نویسنده
چکیده
We present the results from the spectral analysis of the time-average spectrum of the Narrow Line Seyfert 1 (NLS1) galaxy Ark 564 from a ∼ 100 ks XMM-Newton observation.
منابع مشابه
Spectral variability analysis of an XMM - Newton observation of Ark 564
Context. We present a spectral variability analysis of the X-ray emission of the Narrow Line Seyfert 1 galaxy Ark 564 using the data from a ∼ 100 ks XMM-Newton observation. Aims. Taking advantage of the high sensitivity of this long observation and the simple spectral shape of Ark 564, we determine accurately the spectral variability patterns in the source. Methods. We use standard cross-correl...
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We use a 100 ks long XMM-Newton observation of the Narrow-Line Seyfert 1 galaxy Ark 564 and combine it with the month-long monitoring of the same source produced by ASCA, to calculate the phase lags and coherence between different energy bands, over frequencies ∼ 10 to 10 Hz. This is the widest frequency range for which these spectral-timing properties have been calculated accurately for any AG...
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We report on two XMM-Newton observations of the bright narrow-line Seyfert 1 galaxy Ark 564 taken one year apart (2000 June and 2001 June). The 0.6–10 keV continuum is well described by a soft blackbody component (kT ≈ 140–150 eV) plus a steep power law (Γ ≈ 2.50–2.55). No significant spectral changes are observed between the two observations, although the X-ray flux in the second observation i...
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Ark 564 is an archetypal Narrow line Seyfert 1 that has been well observed in soft Xrays from 0.3–10 keV, revealing a steep spectrum, strong soft excess, iron K emission line and dramatic variability on the order of hours. Because of its very steep spectrum, observations of the source above 10 keV have been sparse. We report here on the first NuSTAR observation of Ark 564. The source was observ...
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We present preliminary results of the long-term spectral monitoring of two active galactic nuclei with different broad line shapes: Ark 564 and Arp 102B. Ark 564 is a bright nearby narrow-line Syfert 1 (NLS1) galaxy with relatively narrow permitted optical emission lines and a high Fe II/Hβ ratio, while Arp 102B is a nearby broad-line radio galaxy with broad double-peaked Balmer emission lines....
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