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Astron. Astrophys. 363, 863-868 (2000)

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The BeppoSAX observation of Mrk 766

G. Matt 1, G.C. Perola 1, F. Fiore 2,3,4, M. Guainazzi 5, F. Nicastro 2,3,6 and L. Piro 6

1 Università degli Studi Roma Tre, Dipartimento di Fisica, Via della Vasca Navale 84, 00146 Roma, Italy
2 Osservatorio Astronomico di Roma, Via dell' Osservatorio, 00044 Monteporzio Catone, Italy
3 Harvard-Smithsonian Center of Astrophysics, 60 Garden Street, Cambridge MA 02138, USA
4 SAX/SDC Nuova Telespazio, Via Corcolle 19, 00131 Roma, Italy
5 XMM SOC, VILSPA-ESA, Apartado 50727, 28080 Madrid, Spain
6 Istituto di Astrofisica Spaziale, C.N.R., Via Fosso del Cavaliere, 00133 Roma, Italy

Received 28 April 2000 / Accepted 19 September 2000


The Narrow Line Seyfert 1 galaxy Mrk 766 has been observed by BeppoSAX on May 1997. The source was fairly variable, both in flux and spectrum, during the observation. The variability is the largest around 2 keV, possibly due to variations in the warm absorber properties. An oxygen line is clearly detected, at least in the first part of the observation. An edge around [FORMULA]7.5 keV, coupled with the lack of any detectable iron line, suggests either reprocessing of the primary X-rays by a mildly ionized disc or absorption by a further, thicker and more ionized material.

Key words: galaxies: individual: Mrk 766 – galaxies: Seyfert – X-rays: galaxies

© European Southern Observatory (ESO) 2000

Online publication: December 5, 2000