Astronomy for all!
نویسندگان
چکیده
منابع مشابه
ASTRONOMY AND ASTROPHYSICS Search for GRB X-ray afterglows in the ROSAT all-sky survey
We describe a search for X-ray afterglows from gamma-ray bursts using the ROSAT all-sky survey (RASS) data. If the emission in the soft X-ray band is significantly less beamed than in the gamma-ray band, we expect to detect many afterglows in the RASS. Our search procedure generated 23 afterglow candidates, where about 4 detections are predicted. However, follow-up spectroscopy of several count...
متن کاملA Wideband, Four-Element, All-Digital Beamforming System for Dense Aperture Arrays in Radio Astronomy
Densely-packed, all-digital aperture arrays form a key area of technology development required for the Square Kilometre Array (SKA) radio telescope. The design of real-time signal processing systems for digital aperture arrays is currently a central challenge in pathfinder projects worldwide. We describe an hierarchical, frequency-domain beamforming architecture for synthesising a sky beam from...
متن کاملASTRONOMY AND ASTROPHYSICS Search for GRB afterglows in the ROSAT all-sky survey
We report on the status of our search for Xray afterglows of gamma-ray bursts (GRBs) using the ROSAT all-sky survey (RASS) data. The number of potential X-ray afterglow candidates with respect to the expected number of beamed GRBs allows to constrain the relative beaming angles of GRB emission and afterglow emission at about 1-5 hrs after the GRB.
متن کاملAdaptive Optics for Astronomy
Adaptive Optics is a prime example of how progress in observational astronomy can be driven by technological developments. At many observatories it is now considered to be part of a standard instrumentation suite, enabling ground-based telescopes to reach the diffraction limit and thus providing spatial resolution superior to that achievable from space with current or planned satellites. In thi...
متن کاملThe Unified Astronomy Thesaurus: Semantic Metadata for Astronomy and Astrophysics
Several different controlled vocabularies have been developed and used by the astronomical community, each designed to serve a specific need and a specific group. The Unified Astronomy Thesaurus (UAT) attempts to provide a highly structured controlled vocabulary that will be relevant and useful across the entire discipline, regardless of content or platform. As two major use cases for the UAT i...
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ژورنال
عنوان ژورنال: Astronomy & Geophysics
سال: 2007
ISSN: 1468-4004,1366-8781
DOI: 10.1111/j.1468-4004.2007.48429.x