3 papers
astro-ph2000
ROSAC: Studying the clustering properties of X-ray selected AGNs
F. Tesch, F. J. Carrera, D. Engels +6
We present the first ROSAC results of an AGN clustering analysis. This study comprises a sample of 200 AGNs, 75% of which being at low redshifts z<0.5, in the Ursa Major constellat…
astro-ph1998
Large-scale structures in the distribution of X-ray selected AGN
D. Engels, F. Tesch, C. Ledoux +5
We are searching for large-scale structures in the distribution of AGN discovered by the ROSAT All-Sky Survey. The RASS detected > 60000 X-ray objects, of which approximately 35% a…
astro-ph1998
Is Gamma-ray Absorption by Induced Electric Fields Important in the Pulsar Magnetospheres?
Zheng Zheng, Bing Zhang, G. J. Qiao
Although the unified formula for gamma-ray absorption process involving both the magnetic field and a perpendicular electric field derived by Daugherty & Lerche (1975) is correct,…