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Extremely compact massive galaxies at z~1.4
I. Trujillo, G. Feulner, Y. Goranova +9
The optical rest-frame sizes of 10 of the most massive (~5x10^{11}h_{70}^{-2}M_sun) galaxies found in the near-infrared MUNICS survey at 1.2<z<1.7 are analysed. Sizes were estimate…
The XMM-Newton view of the relativistic spectral features in AXJ0447-0627
R. Della Ceca, L. Ballo, V. Braito +1
The XMM-Newton observation of the optically Type 1 AGN AXJ0447-0627 (z=0.214) unambiguously reveals a complex, bright and prominent set of lines in the 4-8 keV rest frame energy ra…
XMM-Newton observations expose AGN in apparently normal galaxies
P. Severgnini, A. Caccianiga, V. Braito +12
We have performed a detailed analysis of 3 optically normal galaxies extracted from the XMM Bright Serendipitous Source Sample. Thanks to the good statistics of the XMM-Newton data…
On the cosmological evolution of BL Lacs
A. Caccianiga, T. Maccacaro, A. Wolter +2
We study the cosmological evolution of BL Lac objects by applying the Ve/Va analysis to a new sample of 55 objects presented for the first time in this paper. This sample has been…
Unveiling the AGN powering the "Composite" Seyfert/Star-forming galaxy NGC 7679: BeppoSAX and ASCA results
R. Della Ceca, S. Pellegrini, L. Bassani +5
We discuss BeppoSAX observations and archive ASCA data of NGC 7679, a nearby, nearly face-on SB0 galaxy in which starburst and AGN activities coexist. The X-ray observations reveal…
Measuring with the ROSAT Deep Cluster Survey
S. Borgani, P. Rosati, P. Tozzi +7
We analyze the ROSAT Deep Cluster Survey (RDCS) to derive cosmological constraints from the evolution of the cluster X-ray luminosity distribution. The sample contains 103 galaxy c…
Extended radio emission in BL Lac objects - I: the images
P. Cassaro, C. Stanghellini, M. Bondi +3
We have observed 28 sources selected from the 1Jy sample of BL Lac objects (Stickel et al. 1991) with the Very Large Array (VLA) in A, B and D configurations at 1.36, 1.66 and 4.85…
A Medium Survey of the Hard X-Ray Sky with ASCA. II.: The Source's Broad Band X-Ray Spectral Properties
R. Della Ceca, G. Castelli, V. Braito +2
A complete sample of 60 serendipitous hard X-ray sources with flux in the range \ecs to \ecs (2 - 10 keV), detected in 87 ASCA GIS…
A 3 dimensional diagnostic diagram for Seyfert 2s: probing X-ray absorption and Compton thickness
L. Bassani, M. Dadina, R. Maiolino +5
We present and discuss a "3-dimensional" diagnostic diagram for Seyfert2 galaxies obtained by means of X-ray and [OIII] data on a large sample of objects (reported in the Appendix)…
ASCA Observations of the Starburst-Driven Superwind Galaxy NGC 2146: Broad Band (0.6 - 9 keV) Spectral Properties
R. Della Ceca, R. E. Griffiths, T. M. Heckman +2
We report ASCA GIS and SIS observations of the nearby (D = 11.6 Mpc), nearly edge-on, starburst galaxy NGC 2146. These X-ray spectral data complement ROSAT PSPC and HRI imaging dis…
The REX survey: a search for Radio Emitting X-ray sources
A. Caccianiga, T. Maccacaro, A. Wolter +2
We present the scientific goals, the strategy and the first results of the REX project, an effort aimed at creating a sizable and statistically complete sample of Radio Emitting X-…
The ROSAT Deep Cluster Survey: the X-ray Luminosity Function out to z=0.8
P. Rosati, R. Della Ceca, C. Norman +1
We present the X-ray Luminosity Function (XLF) of the ROSAT Deep Cluster Survey (RDCS) sample over the redshift range 0.05-0.8. Our results are derived from a complete flux-limited…
A deep ROSAT Survey X: X-ray Luminous Narrow Emission Line Galaxies
Richard E. Griffiths, Roberto Della Ceca, Ioannis Georgantopoulos +4
X-ray luminous narrow emision-line galaxies (NELG) have been previously identified and proposed as an important class of extragalactic X-ray sources, with a potentially significant…
The variable ROSAT X-ray spectrum of the BL Lac 0716+714
M. Cappi, A. Comastri, S. Molendi +3
The BL Lac object 0716+714 is a powerful flat spectrum radio source detected by CGRO-EGRET at -ray energies. It has been observed for about 21000 s over two days by the X-ray te…