1997A&A...325..457S

Query : 1997A&A...325..457S

1997A&A...325..457S - Astronomy and Astrophysics, volume 325457-472 (1997/9-2)

A UBV / variability / proper motion QSO survey from Schmidt plates. I. Method and success rate.

SCHOLZ R.-D., MEUSINGER H. and IRWIN M.

Abstract (from CDS):

We describe the first combined variability-proper motion survey for QSOs on Schmidt plates. 85 Tautenburg Schmidt plates covering about 9 square degrees near the north Galactic pole were digitised by means of the APM facility in Cambridge. Variability indices have been derived from U and B data, both with a time-baseline of three decades. Structure function analysis has been applied to search for long-term variability. An almost complete set of proper motions were obtained to a mean B≃20 with a mean error of about 2.0mas/yr for B<19.5. Adopting a limiting (completeness) magnitude of Blim=19.7 the success rate of the survey is estimated to >40 per cent. The completeness of the QSO sample detected by this survey is expected to about 90 per cent. The final sample contains 168 QSO candidates; only one has a radio counterpart. The variability-proper motion survey is compared with the selection based on the two-colour index diagram.

Abstract Copyright: ∼

Journal keyword(s): quasars: general - galaxies: photometry - stars: variables: other - astrometry - methods: statistical - surveys

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDSS J133809.70+284435.7 QSO 13 38 09.7048636824 +28 44 35.726673300   20.39 20.09     ~ 18 0
2 NVSS J133858+284412 rG 13 38 58.3133835552 +28 44 11.409687708   18.466       ~ 4 0
3 FIRST J133954.3+291147 Rad 13 39 54.5366785008 +29 11 47.828832756           ~ 1 0
4 SDSS J134014.95+285637.7 QSO 13 40 14.9500650048 +28 56 37.693606848           ~ 8 0
5 FIRST J134031.8+291538 Rad 13 40 31.868 +29 15 38.79           ~ 1 0
6 FIRST J134136.0+293810 rG 13 41 35.8996656960 +29 38 11.188367340   17.60 16.81     ~ 11 0
7 FIRST J134152.2+282601 Rad 13 41 52.207 +28 26 01.11           ~ 1 0
8 FIRST J134152.8+285238 Rad 13 41 52.8868629408 +28 52 38.749072692           ~ 1 0
9 LEDA 1877944 LIN 13 41 59.7261690312 +29 46 53.532135768   16.68       ~ 33 0
10 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
11 FIRST J134214.9+282934 Rad 13 42 14.944 +28 29 34.16           ~ 1 0
12 NGC 5275B rG 13 42 22.07489 +29 49 33.4257   15.4       ~ 7 0
13 FIRST J134255.0+285648 rG 13 42 55.0976176560 +28 56 48.526919592           ~ 6 0
14 FIRST J134329.4+282853 Rad 13 43 29.467 +28 28 53.11           ~ 1 0
15 FIRST J134348.2+294109 rG 13 43 48.29040 +29 41 08.6424           ~ 1 0
16 NVSS J134400+283825 rG 13 44 00.3443994936 +28 38 25.856597796           ~ 3 0
17 NVSS J134414+285235 Rad 13 44 14.408 +28 52 35.55   20.07       ~ 5 1
18 FIRST J134444.4+283755 rG 13 44 44.5469112218 +28 37 55.760459068           ~ 2 0
19 2MASX J13463031+2836461 Sy2 13 46 30.3013263264 +28 36 46.228328856           ~ 10 0
20 [VV2006] J134637.4+290042 QSO 13 46 37.4329700736 +29 00 42.405824160   21.01 20.80     ~ 18 1
21 FIRST J134730.0+282915 rG 13 47 29.9994005016 +28 29 15.679843944           ~ 4 0
22 [VV2006] J134808.7+284008 QSO 13 48 08.6642132232 +28 40 07.920428592     21.30     ~ 7 0
23 p. 87GB 1345+2854 Rad ~ ~   17.84       ~ 1 0

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