Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21811312m&link_type=abstract
American Astronomical Society, AAS Meeting #218, #113.12; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The PS1 survey has covered the 3pi area at least once, and a surprisingly large area has been surveyed in multiple colors at many epochs. This enables two exciting areas of early astrometric study. The PS1 positions can be compared with existing positions (SDSS, USNO-B, etc.) to study the distribution of proper motions of a large number (approaching one billion) of stars using the approximately 10 year baseline between PS1 and SDSS and approximately 25 year baseline between PS1 and the second epoch photographic plates. For the areas where PS1 has multiple epochs and multiple colors, the search for stellar parallaxes using only PS1 data can begin. Given the large area covered and the approximately 10-20mas error for each measurement of brighter stars, the search for new objects within 20pc can begin.
Deacon Niall R.
Liu Michael C.
Magnier Eugene Allen
Monet David G.
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