Title Census of the Galaxy: Challenges for Photometry and Spectrometry with GAIA : Proceedings of the Workshop held in Vilnius, Lithuania 2???6 July 2001 Author(s) Vansevicius, Vladas;Kucinskas, Arunas;Sudzius, Jokubas Publication Dordrecht, Springer Netherlands, 2002. Description IX, 194 p : online resource Abstract Note Astrometry from space was performed for the first time and with great success by the ESA Hipparcos satellite (1989-93). This mission was designed as an as?? trometry mission, but the use of a photon counting detector made it possible to produce very important photometric results: the most accurate astronomical pho?? tometry ever by the main Hipparcos mission in a very broad band of 120000 stars, and the two-colour Tycho-2 photometry of 2.5 million stars. The cornerstone ESA mission GAIA was approved in October 2000 for launch not later than 2012. This mission will use CCDs in time-delayed integration mode instead of the photo-cathode detectors used in Hipparcos. Due to the higher quantum efficiency of the CCDs, simultaneous integration of many stars, and larger tele?? scope apertures GAIA will utilize the star light a million times more efficiently than Hipparcos, resulting in astrometry and multi-colour photometry for one billion stars. GAIA photometry is crucial for the scientific utilization of the astrometric results, and the photometric data have a high scientific content in themselves ISBN,Price 9789401003612 Keyword(s) 1. Astronomy, Observations and Techniques 2. Astronomy???Observations 3. Classical and Quantum Gravitation, Relativity Theory 4. EBOOK 5. EBOOK - SPRINGER 6. GRAVITATION 7. Observations, Astronomical Item Type eBook Multi-Media Links Please Click here for eBook Circulation Data Accession#   Call# Status Issued To Return Due On Physical Location I10549     On Shelf