What does MAST stand for?
MAST stands for Multimission Archive at Space Telescope
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Note that operations of the GALEX satellite will likely be terminated in Spring 2013. The GALEX data archive will continue to be available via the MultiMission Archive at Space Telescope Science Institute (MAST), which is also the only NASA-sanctioned site that distributes GALEX data to the public. Pipeline-processed GALEX data are periodically sent to MAST and ingested into the GALEX/MAST database.
Data from Hubble Space Telescope and several other missions are available from the Multimission Archive at Space Telescope (MAST). Because of the size and complexity of the archive and the data, only a very brief introduction will be given here. Various tools are available for searching and retrieving data from the extensive collections, from a very comprehensive cross-mission search, to more directed search by specific mission, coordinate, instrument, etc.
A group of European astronomers successfully tested wide field photography on standard film using the plates as a master (Zodet, Quebatte, and Heyer, 1994). One of the issues of a duplicate image, especially using CCD?s, is the introduction of noise. To help eliminate this, it is possible to stack the images in the digital realm resulting in a much cleaner image (Bland-Hawthorn and Shopbell, 1993). The high resolution plates have been archived digitally and are available through the DSS (digitized sky survey) thanks to the process of drum scanning. Astronomers from around the world can access previously scanned sky surveys through the MAST (Multimission Archive at Space Telescope.