2004A&A...418...99P

Query : 2004A&A...418...99P

2004A&A...418...99P - Astronomy and Astrophysics, volume 41899-102 (2004/4-4)

New variable stars in open clusters. I. Methods and results for 20 open clusters.

PAUNZEN E., ZWINTZ K., MAITZEN H.M., PINTADO O.I. and RODE-PAUNZEN M.

Abstract (from CDS):

We present high precision CCD photometry of 1791 objects in 20 open clusters with an age of 10Myr to 1Gyr. These observations were performed within the Δa photometric system which is primarily used to detect chemically peculiar stars of the upper main sequence. Time bases range from 30min up to 60-days with data from several nights. We describe the time series analysis reaching a detection limit of down to 0.006mag for apparent variability. In total, we have detected 35 variable objects of which four are not members of their corresponding clusters. The variables cover the entire Hertzsprung-Russell diagram, hence they are interesting targets for follow-up observations.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: open clusters and associations: general - stars: variables: general

Simbad objects: 43

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Number of rows : 43
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 Cl* NGC 2439 PM 93 * 07 40 43.80 -31 40 26.8     15.91     ~ 2 0
2 NGC 2439 OpC 07 40 46.5 -31 41 36   7.31 6.9     ~ 150 0
3 NGC 2439 128 * 07 40 52.09 -31 40 26.5   15.05 14.72     ~ 3 0
4 NGC 2439 239 * 07 41 01.0057105848 -31 42 30.987652032     14.84     ~ 2 0
5 NGC 2489 28 * 07 56 14.8624629672 -30 04 47.490859776   13.57 13.25     ~ 5 0
6 NGC 2489 OpC 07 56 15.7 -30 03 35   8.58 7.9     ~ 83 0
7 NGC 2567 OpC 08 18 36.9 -30 38 15   7.77 7.4     ~ 97 0
8 NGC 2658 OpC 08 43 27.6 -32 39 50     9.2     ~ 55 0
9 NGC 3114 OpC 10 01 55.0 -60 02 16   4.47 4.2     ~ 213 0
10 Cl Melotte 105 OpC 11 19 40.6 -63 29 16   9.05 8.5     ~ 81 0
11 NGC 3960 OpC 11 50 36.4 -55 40 40   9.07 8.3     ~ 152 0
12 Cl Collinder 272 OpC 13 30 19.1 -61 18 59   8.25 7.7     ~ 70 0
13 NGC 5281 OpC 13 46 25.8 -62 55 00   6.15 5.9     ~ 92 0
14 Cl Pismis 20 OpC 15 15 23.5 -59 04 23   8.69 7.8     ~ 103 0
15 NGC 6134 OpC 16 27 48.5 -49 09 40   7.89 7.2     ~ 166 0
16 Cl* NGC 6134 PM 79 * 16 27 50.1049445016 -49 08 41.435389392     15.14     ~ 7 0
17 NGC 6134 42 BS* 16 27 55.5260482824 -49 09 06.486987996   12.59 12.19     ~ 12 0
18 NGC 6192 OpC 16 40 18.7 -43 21 16           ~ 99 0
19 NGC 6204 OpC 16 46 09.1 -47 01 29   8.51 8.2     ~ 139 0
20 NGC 6208 OpC 16 49 20.5 -53 43 27   8.06 7.2     ~ 94 0
21 Cl Lynga 14 OpC 16 55 03 -45 14.3           ~ 44 0
22 Cl* Lynga 14 PPM 1 * 16 55 04.79 -45 17 50.0     14.39     ~ 2 0
23 Cl* Lynga 14 PPM 50 * 16 55 15.7853026200 -45 12 34.488693864     14.78     ~ 2 0
24 Cl* Lynga 14 PPM 15 * 16 55 18.2149798848 -45 16 01.642260648     14.99     ~ 2 0
25 CD-34 11859 ** 17 37 35.84688 -35 00 42.5844 10.52         OB 11 0
26 NGC 6396 OpC 17 37 37.7 -35 00 58   9.41 8.5     ~ 53 0
27 CD-34 11864 s?r 17 37 41.7352911744 -35 01 10.389733248   13.04 10.60     M4 19 0
28 Cl* NGC 6451 PM 35 * 17 50 34.1383359843 -30 11 54.619216423     14.46     ~ 4 0
29 Cl* NGC 6451 PM 67 * 17 50 37.6921054249 -30 12 27.822144283     14.06     ~ 7 0
30 NGC 6451 OpC 17 50 41.5 -30 12 50     8.2     ~ 63 0
31 NGC 6611 198 * 18 18 36.07 -13 47 58.4 13.74 13.8 13.21     Ae 10 0
32 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1
33 NGC 6611 343 EB* 18 18 49.3751453496 -13 46 50.032684956 12.4 12.646 11.792   10.461 B1V 27 0
34 NGC 6705 OpC 18 51 03.7 -06 16 18   6.32 5.8     ~ 442 0
35 NGC 6705 770 V* 18 51 11.3834757096 -06 16 15.735919152   14.230 13.699 13.653   ~ 12 0
36 NGC 6756 OpC 19 08 43.5 +04 42 41     10.6     ~ 43 0
37 Cl* NGC 6756 DAC 24 V* ~ ~     14.51     ~ 2 0
38 Cl* NGC 2658 PM 56 * ~ ~     16.73     ~ 1 0
39 Cl* NGC 6756 DAC 21 V* ~ ~     14.44     ~ 2 0
40 Cl* NGC 6756 DAC 40 V* ~ ~     15.01     ~ 2 0
41 Cl* Pismis 20 PPM 2 * ~ ~     16.04     ~ 2 0
42 Cl* Pismis 20 PPM 1 V* ~ ~     15.43     ~ 2 0
43 Cl* NGC 5281 PM 18 * ~ ~     13.47     ~ 2 0

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