UV-excess quasar candidates (Moreau+, 1995)

Details UV-excess quasar candidates (Moreau+, 1995) UV-excess quasar candidates (Moreau+, 1995)

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..41110169m&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/111/169. Originally published in: 1995A&AS..111..169M

Astronomy and Astrophysics

Astronomy

Qsos, Galaxies: Uv-Excess, Plate Data

Scientific paper

We have developed a procedure (so called PAPA) for measurement of magnitudes (about 0.1mag accurate) and positions (with accuracy better than 0.5arcsec) of all the objects present on photographic plates digitised with the MAMA machine. This homogeneous procedure was applied to four Schmidt plates - in U, B and twice V - covering the Palomar-Sky-Survey field PS +30deg 13h00m, a 40-square-degree zone at the North Galactic Pole. A general-interest exhaustive tricolour catalogue of 19542 star-like objects down to V=20.0 has been produced and we selected 1681 quasar candidates on the basis of ultraviolet excess and, when possible, absence of any measurable proper motion. The astrometric and photometric catalogue of the candidates is given in electronic form. (4 data files).

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