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| Paper: |
Calculating Proper Motions in the WFCAM Science Archive for the UKIRT Infrared Deep Sky Surveys |
| Volume: |
461, Astronomical Data Analysis Software and Systems XXI |
| Page: |
525 |
| Authors: |
Collins, R.; Hambly, N. |
| Abstract: |
The ninth data release from the UKIRT Infrared Deep Sky Surveys (hereafter
UKIDSS DR9), represents five years worth of observations by its wide–field
camera (WFCAM) and will be the first to include proper motion values in its
source catalogues for the shallow, wide–area surveys; the Large Area Survey
(LAS), Galactic Clusters Survey (GCS) and (ultimately) Galactic Plane Survey
(GPS). We, the Wide Field Astronomy Unit (WFAU) at the University of Edinburgh
who prepare these regular data releases in the WFCAM Science Archive (WSA),
describe in this paper how we make optimal use of the individual detection
catalogues from each observation to derive high–quality astrometric fits for
the positions of each detection enabling us to calculate a proper motion
solution across multiple epochs and passbands when constructing a merged source
catalogue. We also describe how the proper motion solutions affect the
calculation of the various attributes provided in the database source catalogue
tables, what measures of data quality we provide and a demonstration of the
results for observations of the Pleiades cluster. |
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