نتایج جستجو برای: ray astronomy
تعداد نتایج: 318915 فیلتر نتایج به سال:
Gamma Ray Astronomy studies cosmic accelerators through their electromagnetic radiation in the energy range between ∼100 MeV and ∼100 TeV. The present most sensitive observations in this energy band are performed, from space, by the Large Area Telescope onboard the Fermi satellite and, from Earth, by the Imaging Air Cherenkov Telescopes MAGIC, H.E.S.S. and VERITAS. These instruments have revolu...
We present the first results from the Calán-Yale Deep Extragalactic Research (CYDER) survey. The main goal of this survey is to study serendipitous X-ray sources detected by Chandra in an intermediate flux range (10 − 10 ergs s) that comprises most of the X-ray background. 267 X-ray sources spread over 5 archived fields were detected. The logN − log S distribution obtained for this sample is co...
Variable Star Network (VSNET) is a global professional-amateur network of researchers in variable stars and related objects, particularly in transient objects, such as cataclysmic variables, black hole binaries, supernovae and gamma-ray bursts. The VSNET has been playing a pioneering role in establishing the field of transient object astronomy, by effectively incorporating modern advance in obs...
We present a broad overview of the principal processes and astrophysical sites of gamma-ray line production and review the main pre-INTEGRAL satellite observations to set the stage to the next European era of gamma-ray line astronomy.
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