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Letter to the Editor
X-ray detections of weak Seyfert 2's with BeppoSAX
M. Salvati 1,
L. Bassani 2,
R. Della Ceca 3,
R. Maiolino 1, 4,
G. Matt 5 and
G. Zamorani 6
Received 15 April 1997 / Accepted 2 May 1997
We report the detection in the X rays of two weak Seyfert 2's (NGC3393 and NGC4941) with the Italian-Dutch satellite BeppoSAX. These are among the first sources observed in a sample of 12 Seyfert 2's which are being studied within the BeppoSAX core program, in an effort to probe the putative torus at high X-ray energies, calibrate an isotropic luminosity indicator for absorbed nuclei, and determine the distribution of torus thicknesses, .
Both a Compton thick spectrum, with a reflected power law and a large equivalent width iron line, and a Compton thin spectrum, with the intrinsic power law transmitted through a large column density absorber, provide acceptable fits to both sources, with some preference for the latter model in the case of NGC4941. The high initial detection rate in our program points to a large final X-ray sample.
Key words: X-rays: galaxies Galaxies: Seyfert Galaxies: individual: NGC3393 Galaxies: individual: NGC4941
Send offprint requests to: M. Salvati
© European Southern Observatory (ESO) 1997
Online publication: June 5, 1998