A dataset provided by the European Space Agency

Name 020640
Title ARK 564: A ''VERY HIGH STATE
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0206400101

DOI 10.5270/esa-befty95
Author Dr IOSSIF PAPADAKIS
Description Recent RXTE and XMM observations have revealed ''characteristic time scales" in the power spectra of AGN. The AGN PSDs appear to be similar to the power spectra of Galactic X-ray binaries, except from Ark 564. There are two ''break frequencies" in the power spectrum of this source, but none of them appears to scale linearly with central black hole mass when compared with the appropriate break frequencies found in the PSDs of Galactic sources at "low-hard" or ''high-soft" state. Here we propose a long (95 ksec) XMM observation of Ark 564 in order to detrmine accurately its high frequency PSD and investigate whether this source is "unique" among AGN with known PSDs, or its variability properties are similar to the properties of Galactic X-ray sources at the "very high state".
Publication XMM-Newton observation of the NLS1 galaxy Ark 564. I. Spectral analysis of the time-average spectrum . Papadakis, I. E., Brinkmann, W., et all. . A&A . 461-931 . 2007 . 2007A&A...461..931P ,
Spectral variability analysis of an XMM-Newton observation of Ark 564 . Brinkmann, W., Papadakis, I. E., . A&A . 465-107 . 2007 . 2007A&A...465..107B ,
Exploring the nuclear environment of the NLS1 galaxy Arakelian 564 with XMM-Newton RGS . Smith, R. A. N., Page, M. J., . A&A . 490-103 . 2008 . 2008A&A...490..103S ,
The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue . Watson, M. G., Schroder, A. C., et all. . A&A . 493-339 . 2009 . 2009A&A...493..339W ,
Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras . Mateos, S., Saxton, R. D., et all. . A&A . 496-879 . 2009 . 2009A&A...496..879M ,
The XMM Cluster Survey: optical analysis methodology and the first data release . Mehrtens, Nicola, Romer, A. Kathy, et all. . MNRAS . 423-1024 . 2012 . 2012MNRAS.423.1024M ,
Spectral-timing evidence for a very high state in the narrow-line Seyfert 1 Ark 564 . Arevalo, P., Papadakis, I. E., et all. . MNRAS . 372-401 . 2006 . 2006MNRAS.372..401A ,
Discovery of multiple Lorentzian components in the X-ray timing properties of the Narrow Line Seyfert 1 Ark 564 . McHardy, I. M., Arevalo, P., et all. . MNRAS . 382-985 . ...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2005-01-05T19:02:03Z/2005-01-06T23:18:17Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2006-02-23T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-02-23T00:00:00Z, 020640, 17.56_20190403_1200. https://doi.org/10.5270/esa-befty95