J/A+AS/111/169 J/A+AS/111/169 UV-excess quasar candidates O Moreau H Reboul Astron. Astrophys. Suppl. Ser. 111 169 1995 1995A&AS..111..169M astrometry quasars: general stars: Population II surveys techniques: photometric white dwarfs 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.

N Detection number --- Name Identification --- RAh Right ascension 2000 h RAm Right ascension 2000 min RAs Right ascension 2000 s DE- Declination sign --- DEd Declination 2000 deg DEm Declination 2000 arcmin DEs Declination 2000 arcsec Umag U magnitude mag u_Umag Uncertainty flag on Umag --- Bmag B magnitude mag u_Bmag Uncertainty flag on Bmag --- Vmag V magnitude mag u_Vmag Uncertainty flag on Vmag --- Rem Remarks number=1 Symbols used in the tables: (section 6 of paper) NPM a proper motion could have been measured, if any greater than 0.07"/year BG the local sky background has been flagged (section 4.3) in U, B and/or V NBQS not in the BQS though measured with B < 16 and U-B < -0.65 QSO quasar Sy Seyfert galaxy AG active galaxy WD white dwarf sd subdwarf (sdO for a subdwarf O, ...) HBB B horizontal branch star NHB a star which may be a HB or a normal one PNN planetary nebula nucleus em. emission line object --- Patricia Bauer CDS 1995Jan16 J_A+AS_111_169.xml