X-ray bright optically quiet galaxies: the case of P3
A. Comastri, M. Brusa, P. Ciliegi, M. Mignoli, C. Vignali, P. Severgnini, R. Maiolino, F. Fiore, F. La Franca, G. Matt, G. C. Perola, A. Baldi, S. Molendi
Abstract
Recent X-ray surveys have clearly demonstrated that a population of optically dull, X-ray bright galaxies is emerging at X-ray fluxes of the order of 10-14 erg cm-2 s-1. The nature of these objects is still unknown. We present the results of multiwavelength observations of what can be considered the best studied example: the Chandra source CXOUJ031238.9-765134 optically identified by Fiore et al. (2000) with an apparently normal galaxy at z=0.159 and called ``Fiore P3''.
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