activity
19972005
most citedThe HELLAS2XMM 1dF survey: on the nature of high X-ray to optical flux ratio sources

1 citations · 1 across the 7 of their papers we have counts for

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Showing 1998Show all

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astro-ph1998

The BeppoSAX High Energy Large Area Survey (HELLAS)

F. Fiore, P. Giommi, F. La Franca +9

We have surveyed about 50 deg-2 of sky in the largely unexplored 5-10 keV band using the BeppoSAX MECS instrument, finding 180 sources. After correction for the non uniform sky cov…

astro-ph1998

First ASCA results for high-redshift Radio-Quiet Quasars

C. Vignali, A. Comastri, M. Cappi +2

Here we report the X-ray spectral analysis of 5 high-redshift () radio-quiet quasars (RQQs) observed with the ASCA satellite. A simple power law with Galactic absorption…