نتایج جستجو برای: astrometry
تعداد نتایج: 1642 فیلتر نتایج به سال:
New Algorithms for Automated Astrometry 2004 In the 'lost-in-space' astronomy problem we are asked to identify the orientation and field-of-view of an image of the sky by matching stars in an image to stars in a catalog. In this work we present two solutions to the problem. In the first approach we reduce an image to coarse positional information represented by a bit-string. We show that by mak...
The future of space-based astrometric missions appears to be very promising. Three missions were described at IAU Colloquium 180. These are the Full-sky Astrometric Mapping Explorer (FAME), the Space Interferometry Mission (SIM) and the Global Astrometric Interferometer for Astrophysics (GAIA) missions. These missions will substantially improve the accuracy of global astrometric measurements ma...
ESO’s PRIMA (Phase-Referenced Imaging and Micro-arcsecond Astrometry) facility at the VLT Interferometer on Cerro Paranal in Chile is expected to be fully operational in only a few years from now. With PRIMA/VLTI, it will then be possible to perform relative astrometry with an accuracy of the order of 10 microarcseconds over angles of about 10 arcseconds. The main science driver for this astrom...
We discuss the unique opportunities for maser astrometry with the inclusion of the Square Kilometre Array (SKA) in Very Long Baseline Interferometry (VLBI) networks. The first phase of the SKA will enable observations of hydroxyl and methanol masers, positioning the latter to an accuracy of 5 microarcseconds, and the second phase may allow water maser observations. These observations will provi...
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