54 citations · 180 across the 18 of their papers we have counts for
18 papers
The Effects of Periodically Gapped Time Series on Cross-correlation Lag Determinations
Y. H. Zhang, I. Cagnoni, A. Treves +2
The three bright TeV blazars Mrk 421, Mrk 501 and PKS 2155-404 are highly variable in synchrotron X-ray emission. In particular, these sources may exhibit variable time lags betwee…
A view of PKS 2155-304 with XMM-Newton Reflection Grating Spectrometers
I. Cagnoni, F. Nicastro, L. Maraschi +2
We present the high resolution X-ray spectrum of the BL Lac object PKS 2155-304 taken with the RGS units onboard XMM-Newton in November 2000. We detect a OVII Kalpha resonant absor…
A Hard Medium Survey with ASCA. IV: the Radio-Loud Type 2 QSO AXJ0843+294 2
R. Della Ceca, V. Braito, V. Beckmann +6
We discuss the X-ray, optical and radio properties of AX J0843+2942, a high luminosity Type 2 AGN found in the ASCA Hard Serendipitous Survey. The X-ray spectrum is best described…
AGNs among ROSAT Blank Field Sources
I. Cagnoni, M. Elvis, D. -W. Kim +3
We selected a sample of sources with high X-ray over optical flux ratio from the ROSAT PSPC archives. Out of the 16 sources in our sample, one is a (possibly extreme) BL Lac and tw…
XMM-Newton detection of warm/hot integalactic medium at z~0.01
Ilaria Cagnoni
We report a ~3 sigma detection of a 21.82 A absorption feature in the direction of the BL Lac MRK 421 which is interpreted as OVII K(alpha) at z~0.01. This corresponds to the redsh…
Clusters of galaxies among ROSAT blank field sources
I. Cagnoni, M. Elvis, D. -W. Kim +3
We present here an efficient method for selecting high luminosity and massive high redshift clusters of galaxies, crucially important tools in cosmology. By selecting bright and ex…