Hard X-ray surveys like those provided by IBIS and BAT on board the INTEGRAL and Swift satellites list a significant number of sources which are unidentified and/or unclassified and which deserve multiwaveband observations to be properly characterized. In this work we have been able to follow up 148 such sources, finding 27 X-ray binaries and 121 Active Galactic Nuclei (AGN). From the AGN sample we extracted a set of 94 AGN, belonging to the INTEGRAL/IBIS and Swift/BAT surveys, for which we performed an X-ray study to determine absorption and 2-10 keV flux by means of XMM-Newton and Swift/XRT available observations. Using a new diagnostic diagram we identified a few peculiar sources which apparently do not fit within the AGN unified theory. Finally, we have compared the optical versus X-ray properties of these 94 AGN to study the optical reddening versus the X-ray absorption local to the AGN
@article{arxiv.1201.3525,
title = {Multiwavelength studies of hard X-ray selected sources},
author = {Pietro Parisi},
journal= {arXiv preprint arXiv:1201.3525},
year = {2019}
}
Comments
Talk at the conference "The Extreme and Variable High Energy Sky", September 19-23, 2011, Chia Laguna, Sardegna (Italy). 6 pages, 3 figures. Accepted for publication on PoS(Extremesky 2011)047