Optical and X-ray monitoring of the NLS1 galaxy Ark 564

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dc.creatorPapadakis, I. E.
dc.creatorBrinkmann, W.
dc.creatorNegoro, H.
dc.creatorDetsis, E.
dc.creatorPapamastorakis, I.
dc.creatorGliozzi, M.
dc.date2000-12-14
dc.date.accessioned2026-07-07T01:57:02Z
dc.date.available2026-07-07T01:57:02Z
dc.descriptionThe Narrow-line Seyfert galaxy Ark 564 was monitored between June 04, 2000 and June 24, 2000 from Skinakas Observatory. The B,V,R and I band light curves show night to night variations of 0.1 mag. Comparison with X-ray data from a simultaneous ASCA observation shows that the X-ray variations are more pronounced than in the optical band. Cross correlation analysis yields a time lag of ~ 0.8 days in the sense that the X-rays are leading the optical but with low statistical significance. We discuss possible implications of our results to current physical models of AGN.
dc.description7 pages, 3 figures, accepted for publication in Astronomy and Astrophysics
dc.identifierhttps://arxiv.org/abs/astro-ph/0012317
dc.identifierhttp://arxiv.org/abs/astro-ph/0012317
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/2227
dc.subjectAstrophysics
dc.titleOptical and X-ray monitoring of the NLS1 galaxy Ark 564
dc.typetext

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