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astro-ph1997
The X-ray flux and spectral variability of EMSS AGN
Paolo Ciliegi, Tommaso Maccacaro
Fifteen ROSAT PSPC observations available in the public archive are analyzed in order to study time and spectral variability of the 12 EMSS AGN detected by ROSAT with more than 200…
astro-ph1997
A Hard Medium Survey with the ASCA GIS: the (2-10 keV) Number Counts Relationship
Ilaria Cagnoni, Roberto Della Ceca, Tommaso Maccacaro
In this paper we report the first results on a medium survey program conducted in the 2-10 keV energy band using data from the GIS2 instrument onboard the ASCA satellite. We have s…