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Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
Herschel was launched on 14 May 2009, and is now an operational ESA space observatory o ering unprecedented observational capabilities in the far-infrared and submillimetre spectral range 55 671 m.
Luminosity-dependent evolution of soft X-ray selected AGN : New Chandra and XMM-Newton surveys
We present new results on the cosmological evolution of unabsorbed (type-1) active galactic nuclei (AGN) selected in the soft (0.5-2 keV) X-ray band. From a variety of ROSAT , XMM-Newton and Chandra
3C 273 : A Star-Like Object with Large Red-Shift
In the early 1960s, astronomers were puzzled by quasars — sources of intense radio emission that seemed to be stars, but had unintelligible optical spectra. In 1963, Maarten Schmidt solved the puzzle
JEM-X: The X-ray monitor aboard INTEGRAL ?
The JEM-X monitor provides X-ray spectra and imaging with arcminute angular resolution in the 3 to 35 keV band. The good angular resolution and the low energy response of JEM-X plays an important
XMM-Newton observation of the Lockman Hole - II. Spectral analysis
We present the results of the X-ray spectral analysis of the first deep X-ray survey with the XMM-Newton observa- tory during Performance Verification. The X-ray data of the Lockman Hole field and
The ROSAT Deep Survey - VI. X-ray sources and Optical identifications of the Ultra Deep Survey
The ROSAT Deep Surveys in the direction of the Lockman Hole are the most sensitive X-ray surveys performed with the ROSAT satellite. About 70-80% of the X-ray background has been resolved into
The Number Density of Low Surface Brightness Galaxies with 23
We present results of a large area CCD survey for low surface brightness galaxies (LSBs) that reaches central surface brightnesses of mu_0=25 mag/sqr-" in V. We have analyzed 17.5 degrees of transit
INTEGRAL observations of the cosmic X-ray background in the 5–100 keV range via occultation by the Earth
Aims. We study the spectrum of the cosmic X-ray background (CXB) in energy range ∼5−100 keV. Methods. Early in 2006 the INTEGRAL observatory performed a series of four 30 ks observations with the
V4332 Sagittarii: A circumstellar disc obscuring the main object
V4332 Sgr experienced an outburst in 1994 whose observational characteristics in many respects resemble those of the eruption of V838 Mon in 2002. It has been proposed that these objects erupted
Discovery of a New Gravitational Lens System
A new gravitational lens system, the triple radio source MG2016+112, has been discovered. Five emission lines at a redshift of 3.2733�0.0014 have been identified in the spectra of two stellar objects