Alejandro Corichi 2, ∗ and Asieh Karami 1, † Centro de Ciencias Matemáticas, Universidad Nacional Autónoma de México, UNAM-Campus Morelia, A. Postal 61-3, Morelia, Michoacán 58090, Mexico Center for Fundamental Theory, Institute for Gravitation and the Cosmos, Pennsylvania State University, University Park PA 16802, USA Instituto de F́ısica y Matemáticas, Universidad Michoacana de San Nicolás de...

We compare galaxy number counts in Advanced Camera for Surveys (ACS) fields containing moderate-redshift (0.2 < z < 1.0) strong gravitational lenses with those in two comparison samples: (1) the first square degree of the COSMOS survey, comprising 259 ACS fields and (2) 20 “pure parallel” fields randomly located on the sky. Through a Bayesian analysis we determine the expectation values (μ0) an...

Context. The COSMOS survey is a multiwavelength survey aimed to study the evolution of galaxies, AGN and large scale structures. Within this survey XMM-COSMOS a powerful tool to detect AGN and galaxy clusters. The XMM-COSMOS is a deep X-ray survey over the full 2 deg2 of the COSMOS area. It consists of 55 XMM-Newton pointings for a total exposure of ∼1.5 Ms with an average vignetting-corrected ...

Two major satellite breakups, the worst in 20 months, occurred just four weeks apart in the fourth quarter of 2001, both producing in excess of 300 large fragments. Two other lesser breakup events brought the total number of satellite fragmentations to nine for the year, a rate not matched since 1998., experienced a significant fragmentation while in an orbit just 30 km above the International ...