2004AJ....128..312M

Query : 2004AJ....128..312M

2004AJ....128..312M - Astron. J., 128, 312-322 (2004/July-0)

Planets in stellar clusters extensive search. II. Discovery of 57 variables in the cluster NGC 2158 with millimagnitude image subtraction photometry.

MOCHEJSKA B.J., STANEK K.Z., SASSELOV D.D., SZENTGYORGYI A.H., WESTOVER M. and WINN J.N.

Abstract (from CDS):

We have undertaken a long-term project, Planets in Stellar Clusters Extensive Search (PISCES), to search for transiting planets in open clusters. NGC 2158 is one of the targets we have chosen–an intermediate age, populous, rather metal-poor cluster. In this paper we present the results of a search for variable stars in the data from the first season of monitoring at the FLWO 1.2 m telescope. This is the first variability search ever conducted in this cluster. We present a catalog of 57 variable stars, most with low-amplitude variability. Among the variables is a cataclysmic variable (CV) that underwent a 2.5 mag outburst. If it is a member of NGC 2158, this would be the fourth CV known in an open cluster. We have also found five δ Scuti stars, three of which have two or more detectable modes of pulsation. Of the 57 variables discovered, 28 have R-band amplitudes of 5% or below. Six of those vary at or below the 2% level, including one with 0.08% variability.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Variables: δ Scuti - Stars: Hertzsprung-Russell Diagram - Stars: Novae, Cataclysmic Variables

Nomenclature: Tables 1,2, 3: Cl* NGC 2158 MSS VNN (Nos V1-V57).

Simbad objects: 61

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Number of rows : 61
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 Cl* NGC 2158 MSS V56 V* 06 06 17.2510336728 +24 03 39.696582384           ~ 2 0
3 Cl* NGC 2158 MSS V19 EB* 06 06 20.4927358488 +24 04 47.853601968   19.8862 18.4662 17.6736   ~ 3 0
4 Cl* NGC 2158 MSS V52 V* 06 06 23.9907756456 +23 54 25.609873716           ~ 2 0
5 Cl* NGC 2158 MSS V51 V* 06 06 25.1226828600 +23 55 11.217834840           ~ 1 0
6 Cl* NGC 2158 MSS V45 V* 06 06 27.8259771024 +23 49 58.636007508           ~ 2 0
7 Cl* NGC 2158 MSS V6 BY* 06 06 31.3233654350 +24 00 22.038576836   18.3358 17.2048 16.6826   ~ 12 0
8 Cl* NGC 2158 MSS V16 EB* 06 06 36.6362967240 +24 03 29.118656304           ~ 3 0
9 Cl* NGC 2158 MSS V7 EB* 06 06 36.9848758224 +23 50 41.125935372           ~ 2 0
10 Cl* NGC 2158 MSS V47 V* 06 06 40.4308581816 +24 06 34.295935140           ~ 3 0
11 Cl* NGC 2158 MSS V50 V* 06 06 42.9814329096 +23 55 15.185175420           ~ 10 0
12 Cl* NGC 2158 MSS V8 EB* 06 06 44.7612729717 +24 06 57.820324674           ~ 4 0
13 Cl* NGC 2158 MSS V29 EB* 06 06 46.1840833776 +23 49 41.297802924           ~ 3 0
14 Cl* NGC 2158 MSS V35 dS* 06 06 47.0690778888 +24 07 41.517061032   17.0484 16.1868 15.8757   ~ 3 0
15 Cl* NGC 2158 MSS V31 EB* 06 06 48.9640648248 +24 01 43.767029352   17.687 16.5479 16.0531   ~ 3 0
16 Cl* NGC 2158 MSS V28 EB* 06 06 49.9638456336 +24 08 26.033401104   18.7562 17.7431 17.3571   ~ 3 0
17 Cl* NGC 2158 MSS V39 dS* 06 06 50.6506953000 +24 10 56.480363508   16.2628 15.4724 15.2426   ~ 3 0
18 Cl* NGC 2158 MSS V23 EB* 06 07 03.5323517592 +24 01 45.212238660   20.7602 19.2899 18.4817   ~ 3 0
19 Cl* NGC 2158 MSS V41 Ro* 06 07 04.1984401656 +23 58 09.444091908   18.8772 17.6857 17.1231   ~ 6 0
20 Cl* NGC 2158 MSS V3 EB* 06 07 04.9209105836 +23 48 53.236583897           ~ 5 0
21 Cl* NGC 2158 MSS V40 V* 06 07 05.5980472344 +24 07 06.432822372           ~ 2 0
22 Cl* NGC 2158 MSS V44 V* 06 07 05.8139455752 +24 08 51.280165392           ~ 2 0
23 Cl* NGC 2158 MSS V48 MS* 06 07 06.1599960912 +24 02 10.155655140   18.1081 16.9994 16.5106   ~ 8 0
24 Cl* NGC 2158 MSS V54 Ro* 06 07 07.0466862360 +24 05 25.278669204   16.5844 15.6815 15.3696   ~ 9 0
25 Cl* NGC 2158 MSS V46 Ro* 06 07 09.7431234960 +24 06 50.170061844   19.3453 18.1133 17.4836   ~ 3 0
26 Cl* NGC 2158 MSS V49 Ro* 06 07 10.1788325640 +24 10 19.366142016   18.1734 16.9946 16.551   ~ 11 0
27 Cl* NGC 2158 MSS V38 dS* 06 07 11.3346058464 +24 03 36.347560056   16.6129 15.9118 15.6317   ~ 15 0
28 [NBN2015] 419 EB* 06 07 14.9147722536 +24 09 40.810368024   20.7115 19.569 19.0235   ~ 4 0
29 Cl* NGC 2158 MSS V36 dS* 06 07 16.8057850824 +24 05 44.834008092   17.0738 16.2499 15.9541   ~ 16 0
30 Cl* NGC 2158 MSS V4 dS* 06 07 17.5039438560 +24 04 45.632298180   19.3239 18.2646 17.8199   ~ 12 0
31 Cl* NGC 2158 MSS V12 EB* 06 07 18.7237299672 +24 06 49.955044284   17.8543 16.9429 16.6547   ~ 8 0
32 Cl* NGC 2158 MSS V34 EB* 06 07 19.8864243456 +23 49 51.421671732           ~ 2 0
33 Cl* NGC 2158 MSS V25 EB* 06 07 19.9235497848 +24 06 24.335781840           ~ 7 0
34 Cl* NGC 2158 MSS V20 EB* 06 07 20.5958976264 +24 06 01.181550744   17.6585 16.7499 16.463   ~ 13 0
35 [NBN2015] 65 EB* 06 07 21.3906157488 +24 05 39.666707088   18.2245 17.3243 17.0309   ~ 7 0
36 [NBN2015] 183 EB* 06 07 23.2684474488 +24 06 12.266149356   18.8086 17.7945 17.4096   ~ 8 0
37 Cl* NGC 2158 MSS V26 EB* 06 07 24.1144629432 +24 07 53.779267056           ~ 7 0
38 Cl* NGC 2158 MSS V55 EB* 06 07 25.7517212328 +24 05 45.641868360   16.97 16.07     ~ 6 0
39 Cl* NGC 2158 MSS V37 dS* 06 07 26.0116495080 +24 04 23.600254404   16.7254 15.9972 15.786   ~ 16 0
40 NGC 2158 OpC 06 07 26.7 +24 05 53           ~ 317 0
41 Cl* NGC 2158 MSS V14 EB* 06 07 27.2343183432 +23 52 24.406031136           ~ 5 0
42 Cl* NGC 2158 MSS V32 EB* 06 07 27.9221197176 +24 06 22.664729628   17.7121 16.7873 16.5606   ~ 8 0
43 Cl* NGC 2158 MSS V13 EB* 06 07 28.1360041704 +24 06 35.253221148   16.9998 16.183 15.925   ~ 7 0
44 [NBN2015] 90 EB* 06 07 29.4195491400 +24 10 06.322789992   20.6773 19.4416 18.9357   ~ 5 0
45 Cl* NGC 2158 MSS V27 EB* 06 07 30.2235911928 +24 07 50.486281428   17.8213 17.0767 16.754   ~ 15 0
46 Cl* NGC 2158 MSS V18 EB* 06 07 31.0019404752 +24 05 50.403167844           ~ 7 0
47 Cl* NGC 2158 MSS V17 EB* 06 07 31.9019125992 +24 06 00.199121508   16.7423 16.0037 15.7136   ~ 9 0
48 Cl* NGC 2158 MSS V1 EB* 06 07 32.6351205552 +23 49 21.074897820           ~ 2 0
49 Cl* NGC 2158 MSS V33 EB* 06 07 33.3271243800 +24 04 34.396373964           ~ 7 0
50 LAWDS NGC 2168 53 CV* 06 07 33.8 +24 07 55           ~ 5 0
51 Cl* NGC 2158 MSS V10 EB* 06 07 34.8907368083 +24 04 25.811814897           ~ 2 0
52 Cl* NGC 2158 MSS V15 EB* 06 07 36.1400763456 +23 48 24.029975916           ~ 2 0
53 Cl* NGC 2158 MSS V42 V* 06 07 36.3157674048 +24 02 07.407395016           ~ 9 0
54 Cl* NGC 2158 MSS V21 EB* 06 07 36.3504070920 +23 56 21.332428152           ~ 4 0
55 Cl* NGC 2158 MSS V22 EB* 06 07 37.6798149648 +24 07 40.150810632   16.660 15.663 15.253   ~ 8 0
56 Cl* NGC 2158 MSS V5 EB* 06 07 40.5890599224 +24 05 03.570277920   19.1684 18.1715 17.7704   ~ 12 0
57 Cl* NGC 2158 MSS V24 EB* 06 07 43.3803288360 +24 06 22.790371356           ~ 6 0
58 2MASS J06074899+2402027 LP* 06 07 48.9887294688 +24 02 02.651954064   19.0828 17.7084 17.0859   ~ 8 0
59 Cl* NGC 2158 MSS V43 V* 06 07 49.9180828776 +24 09 45.481026636           ~ 6 0
60 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
61 NGC 6791 OpC 19 20 52.8 +37 46 40   10.52 9.5     ~ 1120 0

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