Dynamical evolution models of 361 extragalactic Fanaroff–Riley type II radio sources selected from the Cambridge 3CRR, 6CE, 5C6, and 5C7 Sky Surveys, as well Bologna B2, Green Bank GB, GB2 are presented. Their spectra, compiled mostly recent catalogs available NASA/IPAC Astrophysical Catalogs Support System databases, along with morphological characteristics determined their maps, have been mod...

We present results from our optical survey of the position error contours (“error boxes”) of unidentified EGRET sources at mid to high Galactic latitude. It is our intention to search for potential blazars that may have been missed in the original identification process of the three EGRET Catalogues and supplementary publications. We have first searched the error contours of unidentified source...

The GEMS project involves a multi-wavelength study of a sample of 60 galaxy groups, chosen to span a wide range of group properties. Substantial ROSAT PSPC observations, available for all of these groups, are used to characterise the state of the intergalactic medium in each. We present the results of a uniform analysis of these ROSAT data, and a statistical investigation of the relationship be...

Abstract The CatWISE2020 Catalog consists of 1,890,715,640 sources over the entire sky selected from Wide-field Infrared Survey Explorer (WISE) and NEOWISE survey data at 3.4 4.6 μ m (W1 W2) collected 2010 January 7 to 2018 December 13. This set adds two years that used for CatWISE Preliminary Catalog, bringing total six times as many exposures spanning 16 large a time baseline AllWISE catalog....

Due to its proximity and its importance for the understanding of active galaxies and their active nuclei (AGN), Centaurus A has been observed frequently within the last 150 years in all accessible wavelength bands. Thus a wealth of data exists which has been compiled into the ”NASA Extragalactic Database” (NED). Missing from this compilation are to date almost completely the results of recent h...

Due to its proximity and its importance for the understanding of active galaxies and their active nuclei (AGN), Centaurus A has been observed frequently within the last 150 years in all accessible wavelength bands. Thus a wealth of data exists which has been compiled into the ”NASA Extragalactic Database” (NED). Missing from this compilation are to date almost completely the results of recent h...

We present results on spectral index distributions, number counts, redshift distribution and other general statistical properties of extragalactic point sources in the NEWPS5σ sample (López-Caniego et al. 2007). The flux calibrations at all the WMAP channels have been reassessed both by comparison with ground based observations and through estimates of the effective beam areas. The two methods ...

We report the discovery of water maser emission in eight active galactic nuclei (AGN) with the 70-m NASA Deep Space Network (DSN) antennas at Tidbinbilla, Australia and Robledo, Spain. The positions of the newly discovered masers, measured with the VLA, are consistent with the optical positions of the host nuclei to within 1σ (0. 3 radio and 1. 3 optical) and most likely mark the locations of t...