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astro-ph.GA2018
Dramatic X-ray spectral variability of a Compton-thick type-1 QSO at
Torben Simm, Johannes Buchner, Andrea Merloni +6
We report on the discovery of a dramatic X-ray spectral variability event observed in a broad line type-1 QSO. The XMM-Newton spectrum from the year 2000 is characterized…
astro-ph.GA2018
Spectroscopic characterization of the protocluster of galaxies around 7C 1756+6520 at z ~ 1.4
V. Casasola, L. Magrini, F. Combes +6
The aim of this paper is the spectroscopic study of 13 galaxies belonging to the field of the protocluster associated with the radio galaxy (RG) 7C 1756+6520 at z = 1.4156. In part…