2002A&A...390..879B


Query : 2002A&A...390..879B

2002A&A...390..879B - Astronomy and Astrophysics, volume 390, 879-890 (2002/8-2)

A QSO survey via optical variability and zero proper motion in the M92 field. IV. More QSOs due to improved photometry.

BRUNZENDORF J. and MEUSINGER H.

Abstract (from CDS):

We continue the QSO search in the 10 square degrees Schmidt field around M92 based on variability and proper motion (VPM) constraints. We have re-reduced 162 digitised B plates with a time-baseline of more than three decades and have considerably improved both the photometric accuracy and the star-galaxy separation at B>19. QSO candidates are selected and marked with one out of three degrees of priority based on the statistical significance of their measured variability and zero proper motion. Spectroscopic follow-up observations of 84 new candidates with B>19 revealed an additional 37 QSOs and 7 Seyfert1s. In particular, all 92 high-priority candidates are spectroscopically classified now; among them are 70 QSOs and 9 Seyfert1s (success rate 86%). We expect that 87% (55%) of all QSOs with B<19.0 (19.8) are contained in this high-priority subsample. For the combined sample of high-priority and medium-priority objects, a completeness of 89% is estimated up to Blim = 19.5. The sample of all AGNs detected in the framework of the VPM search in the M92 field contains now 95 QSOs and 14 Seyfert1s with B≤19.9. Although the VPM QSOs were selected by completely different criteria, their properties do not significantly differ from those of QSOs found by more traditional optical survey techniques. In particular, the spectra and the optical broad band colours do not provide any hints on a substantial population of red QSOs up to the present survey limit.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: Seyfert - galaxies: statistics - quasars: general

Nomenclature: Table 2: [MB2001] NNN (Nos 66-109) added.

Simbad objects: 48

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Number of rows : 48
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2328 0
2 [VV2006] J170846.2+440840 QSO 17 08 46.103 +44 08 40.11     19.60     ~ 3 0
3 [VV2006] J170942.4+425315 QSO 17 09 42.4590967258 +42 53 14.775844796     19.70     ~ 10 0
4 [VV2006] J171001.1+432548 QSO 17 10 01.175 +43 25 48.17     19.90     ~ 4 0
5 [VV2006] J171052.7+431506 QSO 17 10 52.6775728421 +43 15 06.249559388     19.70     ~ 4 0
6 [VV2006] J171055.6+425310 QSO 17 10 55.6659736248 +42 53 09.890452070     19.80     ~ 4 0
7 NVSS J171123+434842 Rad 17 11 23.3 +43 48 45           ~ 4 1
8 [VV2006] J171123.9+434838 QSO 17 11 23.894 +43 48 37.84     19.10     ~ 4 0
9 [MB2001] 103 Sy1 17 11 39.8 +42 14 52           ~ 3 0
10 [VV2006] J171200.6+432945 QSO 17 12 00.6016141505 +43 29 43.996278199     19.30     ~ 4 0
11 [VV2006] J171226.4+414212 QSO 17 12 26.3846397422 +41 42 11.280421569     19.80     ~ 4 0
12 [VV2006] J171308.8+420811 QSO 17 13 08.824 +42 08 11.93     19.60     ~ 3 0
13 [VV2006] J171310.6+434856 QSO 17 13 10.6499934984 +43 48 55.386441212     19.70     ~ 7 0
14 [VV2006] J171311.2+425155 QSO 17 13 11.2255500653 +42 51 54.672605820     19.70     ~ 4 0
15 [VV2006] J171320.9+441531 QSO 17 13 20.8791885929 +44 15 31.045232172     19.30     ~ 4 0
16 [VV2006] J171402.9+424423 QSO 17 14 02.8822324199 +42 44 23.294787237     19.50     ~ 4 0
17 [VV2006] J171404.1+432236 QSO 17 14 04.184 +43 22 36.41     19.80     ~ 3 0
18 [MB2001] 104 Sy1 17 14 45.2 +42 20 27           ~ 3 0
19 [VV2006] J171500.6+425439 QSO 17 15 00.607 +42 54 39.75     19.50     ~ 3 0
20 [VV2006] J171532.2+434800 QSO 17 15 32.1841911005 +43 47 59.023217928     19.50     ~ 4 0
21 [VV2006] J171540.1+424227 QSO 17 15 40.077 +42 42 27.40     19.70     ~ 3 0
22 [VV2006] J171605.8+433027 QSO 17 16 05.826 +43 30 26.64     19.80     ~ 3 0
23 [VV2006] J171606.8+440836 Sy1 17 16 06.8034894456 +44 08 35.465926567     19.40     ~ 4 0
24 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 1955 0
25 [MB2001] 84 AGN 17 17 13.2 +44 21 05           ~ 3 0
26 [VV2006] J171732.6+435655 QSO 17 17 32.5277640500 +43 56 55.076664949     19.30     ~ 4 0
27 [VV2006] J171736.8+442327 QSO 17 17 36.732 +44 23 26.46     19.70     ~ 3 0
28 [VV2006] J171737.0+421653 QSO 17 17 36.947 +42 16 54.48     19.60     ~ 3 0
29 2MASX J17182095+4249142 Sy1 17 18 20.9247979228 +42 49 14.040141845     17.77     ~ 8 0
30 [VV2006] J171824.0+422548 QSO 17 18 23.983 +42 25 48.42     19.50     ~ 3 0
31 [MB2001] 107 Sy1 17 19 12.0 +42 10 48           ~ 3 0
32 [VV2006] J171912.1+441122 QSO 17 19 12.0077958550 +44 11 21.605520118     19.40     ~ 5 1
33 [VV2006] J171912.2+432044 QSO 17 19 12.179 +43 20 44.64     18.90     ~ 3 0
34 [VV2006] J171915.4+442247 QSO 17 19 15.4066928046 +44 22 46.299908748     18.60     ~ 4 0
35 RX J1719.5+4245 X 17 19 36.0 +42 45 18           ~ 5 0
36 [MB2001] 108 Sy1 17 19 36.7 +42 45 29   19.2       ~ 4 0
37 [VV2006] J171942.9+430928 QSO 17 19 42.8202278209 +43 09 27.220879179     19.50     ~ 3 0
38 [VV2006] J171952.9+414339 QSO 17 19 52.9342884695 +41 43 39.173941031     19.80     ~ 4 0
39 [VV2006] J172004.8+414744 QSO 17 20 04.8274531162 +41 47 43.897218344     19.80     ~ 4 0
40 [VV2006] J172011.0+434635 QSO 17 20 10.9773147358 +43 46 34.467909182     19.90     ~ 4 0
41 [MB2001] 96 AGN 17 21 17.5072642143 +43 01 27.176949823   18.3   18.8   ~ 4 0
42 [VV2006] J172142.2+424432 QSO 17 21 42.2 +42 44 32     19.40     ~ 3 0
43 [MB2001] 109 Sy1 17 21 53.9 +42 33 36           ~ 3 0
44 [VV2006] J172203.0+434107 QSO 17 22 03.0197952903 +43 41 05.992549850     19.40     ~ 4 0
45 [VV2006] J172321.5+432903 QSO 17 23 21.442 +43 29 03.37     19.90     ~ 3 0
46 [VV2006] J172345.9+440327 QSO 17 23 45.949 +44 03 27.09     19.70     ~ 3 0
47 [VV2006] J172401.5+432030 QSO 17 24 01.4589568383 +43 20 30.576861885     19.70     ~ 4 0
48 [VV2006] J172414.2+421047 QSO 17 24 14.2210348248 +42 10 47.035810682   18.6 19.50 19.0   ~ 5 0

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2021.08.05-21:10:37

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