2003AJ....125.3175M

Query : 2003AJ....125.3175M

2003AJ....125.3175M - Astron. J., 125, 3175-3184 (2003/June-0)

Long-term variability survey of the old open cluster NGC 6791.

MOCHEJSKA B.J., STANEK K.Z. and KALUZNY J.

Abstract (from CDS):

We present the results of a long-term variability survey of the old open cluster NGC 6791. The BVI observations, collected over a time span of 6 years, were analyzed using the ISIS image subtraction package. The main target of our observations were two cataclysmic variables, B7 and B8. We have identified possible cycle lengths of about 25 and 18 days for B7 and B8, respectively. We tentatively classify B7 as a VY Sculptoris type nova-like variable or a Z Camelopardalis type dwarf nova. B8 is most likely an SS Cygni type dwarf nova. We have also extracted the light curves of 42 other previously reported variable stars and discovered seven new ones. The new variables show long-period or nonperiodic variability. The long baseline of our observations has also allowed us to derive more precise periods for the variables, especially for the short-period eclipsing binaries.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Color-Magnitude Diagrams - Stars: Novae, Cataclysmic Variables - Galaxy: Open Clusters and Associations: Individual: NGC Number: NGC 6791 - Stars: Variables: Other

Nomenclature: Tables 2, 4: Cl* NGC 6791 KR VNN (Nos V68-V74) added.

Simbad objects: 52

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Number of rows : 52
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* V513 Lyr EB* 19 20 24.9782041728 +37 49 18.554404440   18.634     16.81 ~ 13 0
2 Cl* NGC 6791 KR V32 EB* 19 20 27.6 +37 47 14   20.250 19.334 18.760   ~ 4 0
3 V* V696 Lyr LP* 19 20 32.1911910960 +37 44 20.846910012   16.330 14.722   10.790 ~ 20 0
4 V* V515 Lyr EB* 19 20 33.2921313572 +37 48 16.366712433   20.386 19.449 18.843 18.16 ~ 9 0
5 V* V516 Lyr CV* 19 20 35.7418540680 +37 44 52.043756748 19.92 21.07       ~ 34 0
6 V* V598 Lyr BY* 19 20 38.8882974240 +37 49 04.308135780   19.172 17.949 17.279 16.64 ~ 17 0
7 V* V564 Lyr Ro* 19 20 39.8133971280 +37 43 54.192022860   17.322 16.224 15.522   ~ 14 0
8 V* V517 Lyr EB* 19 20 42.9275119224 +37 50 56.252364468   18.528 17.499 16.931   ~ 24 0
9 V* V604 Lyr Ro* 19 20 45.2601302352 +37 45 48.649883292   17.989 17.081 16.518 16.04 ~ 13 0
10 Cl* NGC 6791 KR V45 Ro* 19 20 46.0474119696 +37 42 05.722017516   17.964 17.083 16.463   ~ 4 0
11 V* V518 Lyr EB* 19 20 46.5295641144 +37 48 47.640580776   18.062 17.193 16.669 16.24 ~ 17 0
12 V* V519 Lyr EB* 19 20 47.6043469800 +37 44 31.821120744   17.026 16.241 15.718   ~ 27 0
13 V* V520 Lyr EB* 19 20 47.8810977888 +37 46 37.198197084   18.391 17.219 16.458 15.77 ~ 29 0
14 V* V565 Lyr EB* 19 20 49.3769291736 +37 46 09.059900844   18.612 17.658 17.197   ~ 40 0
15 NGC 6791 3012 RG* 19 20 49.7230010696 +37 43 42.757322450   15.68 13.96   10.95 ~ 41 0
16 V* V611 Lyr BY* 19 20 50.9663833670 +37 48 24.602655144     19.072 18.359   ~ 6 0
17 V* V612 Lyr El* 19 20 51.6624999408 +37 45 24.570141876   19.540   18.065 17.53 ~ 8 0
18 V* V566 Lyr Ro* 19 20 52.3517903304 +37 45 50.652968796   16.715       ~ 16 0
19 V* V613 Lyr El* 19 20 52.4664983376 +37 47 30.303263364   17.256 16.272 15.645   ~ 15 0
20 V* V616 Lyr Ro* 19 20 52.9621453200 +37 46 52.294552716   15.728 14.84     G9II 18 0
21 NGC 6791 OpC 19 20 53.0 +37 46 41   10.52 9.5     ~ 1040 0
22 V* V521 Lyr EB* 19 20 54.2212145040 +37 48 23.603257836   18.689 17.771 17.170   ~ 17 0
23 V* V567 Lyr EB* 19 20 54.280 +37 45 34.73   18.400       ~ 19 0
24 V* V568 Lyr EB* 19 20 57.3346763352 +37 45 36.739962972   18.295   16.823   ~ 43 0
25 Cl* NGC 6791 KR V42 BY* 19 21 00.2020875840 +37 42 53.227785420   20.679   18.954 18.35 ~ 4 0
26 V* V624 Lyr EB* 19 21 00.6897752344 +37 45 44.841437480   19.576 18.697 18.083   ~ 8 0
27 V* V625 Lyr BY* 19 21 00.8297295816 +37 44 35.209666824     18.803 18.257 17.79 ~ 7 0
28 V* V627 Lyr El* 19 21 02.4630101016 +37 47 09.060968436 16.80 17.73 17.125 16.565 16.10 ~ 25 1
29 Cl* NGC 6791 KR V6 EB* 19 21 02.705088 +37 48 48.65328     15.430 15.28   ~ 25 0
30 Cl* NGC 6791 KR V62 Ro* 19 21 03.0502853184 +37 43 51.556783692     19.189 18.618   ~ 6 0
31 V* V630 Lyr LP* 19 21 03.6693642648 +37 48 03.468090132   18.170 16.959 16.180   ~ 10 0
32 V* V631 Lyr EB* 19 21 03.69 +37 46 05.9   19.732 18.833 18.195   ~ 7 0
33 Cl* NGC 6791 KR V74 V* 19 21 07.2 +37 44 21   15.921 14.660     ~ 3 0
34 V* V523 Lyr CV* 19 21 07.3950071424 +37 47 56.271903940 17.70         ~ 32 0
35 Cl* NGC 6791 KR V48 Ro* 19 21 07.4740332600 +37 43 06.370506876     17.558 17.003   ~ 8 0
36 V* V634 Lyr El* 19 21 07.5828785160 +37 48 09.375343704   18.707 17.850 17.276 16.78 ~ 11 0
37 Cl* NGC 6791 KR V66 Ro* 19 21 08.4180376416 +37 44 55.016599164   17.174 16.119 15.372   ~ 13 0
38 V* V710 Lyr LP* 19 21 10.4820614688 +37 43 24.565707732   18.433 17.291 16.563   ~ 7 0
39 V* V524 Lyr EB* 19 21 11.8 +37 47 58   20.469 19.642 18.922   ~ 7 0
40 Cl* NGC 6791 KR V51 BY* 19 21 12.1632612528 +37 44 54.543822756     19.971 19.257 18.73 ~ 4 0
41 Cl* NGC 6791 KU B4 HS* 19 21 12.8916906768 +37 45 51.138205956 16.73 17.69 17.873 17.910 18.02 sdB 42 0
42 Cl* NGC 6791 KR V58 Ro* 19 21 14.5273680144 +37 48 04.232537532     17.544 17.028 16.58 ~ 8 0
43 V* V525 Lyr EB* 19 21 15.7519465680 +37 46 09.507743796   19.471 18.535 17.955 17.45 ~ 12 0
44 Cl* NGC 6791 KR V29 EB* 19 21 17.3 +37 45 05   20.971 20.046 19.083 18.39 ~ 4 0
45 V* V526 Lyr EB* 19 21 17.5 +37 46 00   20.672 19.537 19.074 17.84 ~ 9 0
46 Cl* NGC 6791 KR V37 EB* 19 21 18.2362870776 +37 51 06.752376684   20.905 19.535 18.353 17.10 ~ 4 0
47 KOI-1003 RS* 19 21 18.6969974520 +37 43 36.184313172   17.461 16.524 15.929   G8IV-V 30 0
48 Cl* NGC 6791 KR V46 BY* 19 21 18.9777265056 +37 47 55.911318324     18.688 17.930 17.29 ~ 4 0
49 Cl* NGC 6791 KR V52 Ro* 19 21 20.8633729848 +37 46 19.011585360       17.016 16.61 ~ 8 0
50 Cl* NGC 6791 KR V72 V* ~ ~   25.925 15.111     ~ 2 0
51 Cl* NGC 6791 KR V69 V* ~ ~   15.357 13.844     ~ 2 0
52 Cl* NGC 6791 KR V68 V* ~ ~   14.786 14.211     ~ 2 0

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