2002A&A...382..899S

Query : 2002A&A...382..899S

2002A&A...382..899S - Astronomy and Astrophysics, volume 382, 899-909 (2002/2-2)

Photometric variability in the old open cluster M 67. II. General survey.

STASSUN K.G., VAN DEN BERG M., MATHIEU R.D. and VERBUNT F.

Abstract (from CDS):

We use differential CCD photometry to search for variability in BVI among 990 stars projected in and around the old open cluster M67. In a previous paper we reported results for 22 cluster members that are optical counterparts to X-ray sources; this study focuses on the other stars in our observations. A variety of sampling rates were employed, allowing variability on time scales ranging from ∼0.3 hours to ∼20 days to be studied. Among the brightest sources studied, detection of variability as small as σ≃10mmag is achieved (with >3σ confidence); for the typical star observed, sensitivity to variability at levels σ≃20 mmag is achieved. The study is unbiased for stars with 12.5<B<18.5, 12.5<V<18.5, and 12<I<18 within a radius of about 10 arcmin from the cluster centre. In addition, stars with 10<BVI<12.5 were monitored in a few small regions in the cluster. We present photometry for all 990 sources studied, and report the variability characteristics of those stars found to be variable at a statistically significant level. Among the variables, we highlight several sources that merit future study, including stars located on the cluster binary sequence, stars on the giant branch, blue stragglers, and a newly discovered WUMa system.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - stars: variables: general - open clusters and associations: individual: M 67

VizieR on-line data: <Available at CDS (J/A+A/382/899): table1.dat table2.dat table3.dat tables.tex>

Nomenclature: Table 2: Cl* NGC 2682 SVM A (Nos A-M).

CDS comments: in ref list HONEYCUTT 1992PASP..104..435H instead of PASP.435.440

Simbad objects: 67

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Number of rows : 67
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 Cl* NGC 2682 SAND 645 PM* 08 50 39.4174547736 +12 02 33.629157564   16.20   13.7 11.2 M3.0 12 0
2 Cl* NGC 2682 SAND 647 V* 08 50 40.3746079224 +12 02 38.479362432   14.43 13.898     ~ 19 0
3 Cl* NGC 2682 SAND 648 V* 08 50 42.6189386400 +12 03 10.068571764   13.93 13.311     ~ 19 0
4 Cl* NGC 2682 SAND 632 * 08 50 42.689 +11 56 19.92   16.29 15.469     ~ 4 0
5 Cl* NGC 2682 SAND 828 * 08 50 44.5320416040 +11 59 25.175735088 15.043 15.07 14.521 14.372   ~ 8 0
6 V* HQ Cnc EB* 08 50 44.9946861504 +11 45 45.317552364   18.08 17.77     A 7 0
7 Cl* NGC 2682 SAND 745 SB* 08 50 46.0916139312 +11 43 08.297523444 13.686 13.71 13.077   12.435 F9V 29 0
8 Cl* NGC 2682 SAND 844 V* 08 50 48.6230924200 +12 03 41.344728966   14.2 13.614 13.550   ~ 22 0
9 Cl* NGC 2682 FBC 2642 * 08 50 52.92 +11 43 12.7 18.372 17.820 16.929   15.975 ~ 3 0
10 Cl* NGC 2682 SAND 843 V* 08 50 53.0053582560 +12 03 39.078544572   15.35 14.671     ~ 8 0
11 Cl* NGC 2682 SAND 819 RS* 08 50 54.9862572848 +11 56 50.269982215 17.667 16.92 15.905     ~ 27 0
12 Cl* NGC 2682 SAND 848 Ro* 08 50 57.2016257688 +12 05 36.453567444   14.58 14.012 13.810   ~ 22 0
13 Cl* NGC 2682 SAND 845 Ro* 08 50 59.0910855336 +12 04 18.543576936   14.34 13.884     ~ 10 0
14 Cl* NGC 2682 SAND 846 V* 08 51 04.6999349160 +12 04 19.267626936   14.13 13.553     ~ 28 0
15 Cl* NGC 2682 SAND 757 EB* 08 51 04.8272787384 +11 45 56.881089612 14.331 14.216 13.541   12.841 ~ 49 0
16 Cl* NGC 2682 SAND 1077 SB* 08 51 07.2254409816 +11 53 01.951858464 13.382 13.24 12.595   11.752 F4 48 0
17 Cl* NGC 2682 SAND 2227 SB* 08 51 09.6942576744 +11 59 09.695781528 14.325 14.33 13.780     ~ 25 0
18 Cl* NGC 2682 SAND 1109 SB* 08 51 09.7018052520 +11 59 13.702607916 14.163 14.15 12.970 13.464   ~ 13 0
19 Cl* NGC 2682 SAND 1063 RS* 08 51 13.3549065744 +11 51 40.172654052 15.557 14.84 13.573   12.591 G8IV 57 0
20 Cl* NGC 2682 ES I-242 b BS? 08 51 14.4420520440 +11 45 03.406180392 13.440 13.37 12.839   12.172 ~ 17 0
21 Cl* NGC 2682 SAND 974 * 08 51 14.4635619792 +11 44 40.996062996 17.221 16.64 15.742   14.782 ~ 24 0
22 Cl* NGC 2682 FBC 3348 * 08 51 17.0529379176 +11 48 26.807464440   18.804 17.410   15.793 ~ 12 0
23 Cl* NGC 2682 SAND 999 RS* 08 51 18.6870620808 +11 47 02.715891216 13.632 13.38 12.569 12.143 11.69 ~ 90 0
24 Cl* NGC 2682 SAND 1093 * 08 51 18.7227129504 +11 55 49.732549032 14.906 14.73 14.134   13.449 G0V 39 0
25 Cl* NGC 2682 SAND 1070 RS* 08 51 19.6901093120 +11 52 10.753229665 14.643 14.52 13.939   13.156 G1V 45 0
26 Cl* NGC 2682 MMJ 5678 * 08 51 20.2684037040 +11 46 19.808382360   19.191 17.718   15.960 ~ 5 0
27 Cl* NGC 2682 SAND 1082 EB* 08 51 20.7915 +11 53 26.168   11.66 11.150 11.09 10.722 F5IV 120 0
28 Cl* NGC 2682 SAND 1120 * 08 51 20.8274467920 +12 05 31.161110820   16.49 15.631     ~ 7 0
29 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
30 Cl* NGC 2682 ES I-245 mul 08 51 24.102720 +11 47 10.00428 14.294 12.93 12.22 13.00 12.781 ~ 13 0
31 Cl* NGC 2682 SAND 1112 RS* 08 51 24.1103539344 +12 01 30.643631940   15.76 15.043     G6V 17 0
32 Cl* NGC 2682 MMJ 5766 * 08 51 24.1418780424 +11 48 26.714590812   18.247 17.026 16.302 15.718 ~ 13 0
33 Cl* NGC 2682 FBC 3586 V* 08 51 24.2808631224 +12 05 56.497293240   16.697 15.722     ~ 6 0
34 Cl* NGC 2682 ES IV-239 SB* 08 51 24.3727414128 +11 49 50.513632176 16.054 15.86 15.055 14.614 14.189 G9V 20 0
35 Cl* NGC 2682 SAND 1113 RS* 08 51 25.3043953560 +12 02 56.494997844 15.299 14.78 13.736     ~ 63 0
36 V* ET Cnc EB* 08 51 26.7153102238 +11 56 12.173349613 17.711 16.98 15.850     ~ 32 0
37 Cl* NGC 2682 SAND 1036 EB* 08 51 28.1469477144 +11 49 27.495860592 13.262 13.27 12.809   12.184 F3 78 0
38 NGC 2682 164 RG* 08 51 28.9910274072 +11 50 33.127331784   11.675 10.441 10.250 9.46 K1III 143 0
39 NGC 2682 173 RG* 08 51 30.4540403064 +11 48 58.324606164 13.834 13.12 11.731 11.594 11.08 ~ 43 0
40 Cl* NGC 2682 SAND 1264b * 08 51 30.5684124360 +11 48 54.810446220 13.984 13.92 13.349   12.618 ~ 28 0
41 Cl* NGC 2682 SAND 1341 V* 08 51 30.7550703428 +12 04 16.078864840   15.48 14.807     G4V 27 0
42 NGC 2682 185 BS* 08 51 32.5946133024 +11 48 52.103681712   11.46 11.48   10.80 A0V 67 0
43 Cl* NGC 2682 SAND 1284 BS* 08 51 34.3150275672 +11 51 10.497400452   11.17 10.92   10.622 B9V 96 0
44 NGC 2682 193 RG* 08 51 35.7789056016 +11 53 34.748492712 13.904 13.22 12.267   11.228 K0III 105 0
45 Cl* NGC 2682 SAND 1282 EB* 08 51 37.8473566296 +11 50 57.092451072 13.964 13.89 13.333   12.634 F7V 164 0
46 Cl* NGC 2682 SAND 1344 V* 08 51 38.2284288408 +12 05 07.612707120   14.43 13.887     ~ 14 0
47 Cl* NGC 2682 FBC 4006 * 08 51 38.23 +12 05 13.8     17.40     ~ 2 0
48 Cl* NGC 2682 ES III-35 RG* 08 51 39.3860048856 +11 51 45.671254056 13.832 13.1 12.117   11.078 K0III 72 0
49 Cl* NGC 2682 FBC 4050 Ro* 08 51 39.7540807260 +12 05 51.861863671   16.67 15.635     ~ 22 0
50 Cl* NGC 2682 SAND 1224b SB* 08 51 50.1198676776 +11 45 00.348198048 14.444 14.14 13.776   13.040 ~ 15 0
51 Cl* NGC 2682 SAND 1224a SB* 08 51 50.2186854285 +11 44 57.093066161 14.215 14.12 12.895   12.771 ~ 24 0
52 Cl* NGC 2682 SAND 1507 Er* 08 51 51.7437090892 +12 04 46.859320494   14.04 13.491     F9 30 0
53 NGC 2682 252 V* 08 51 52.8080017824 +12 04 19.002557316   13.31 12.746     F8IV 27 0
54 Cl* NGC 2682 SAND 1504 V* 08 51 53.1877493736 +12 03 32.030995608 14.516 14.54 13.964     ~ 20 0
55 Cl* NGC 2682 FBC 4491 * 08 51 55.6617371064 +11 43 39.227228472 17.857 17.22 16.08 16.05 14.975 ~ 9 0
56 Cl* NGC 2682 SAND 1497 * 08 51 56.7032350824 +12 02 47.977760148   14.89 14.365     ~ 7 0
57 Cl* NGC 2682 FBC 4555 * 08 51 57.9744786192 +11 43 38.606388636 20.400 19.289 17.840     ~ 12 0
58 Cl* NGC 2682 ES III-116 SB* 08 51 59.9350468488 +12 04 58.944701928   13.37 12.858     G2IV 27 0
59 Cl* NGC 2682 SAND 1492 * 08 52 01.5303701688 +12 01 03.674694648   15.36 14.679     ~ 9 0
60 Cl* NGC 2682 SAND 1505 Ro* 08 52 01.5636878785 +12 03 54.235669776   14.84 14.295 14.055   ~ 24 0
61 Cl* NGC 2682 SAND 1509 Er* 08 52 02.3089059072 +12 05 15.006693804   12.46 10.892     ~ 11 0
62 Cl* NGC 2682 SAND 1503 Ro* 08 52 03.4619001589 +12 03 29.973008340   14.06 13.051     ~ 16 0
63 Cl* NGC 2682 FBC 4712 * 08 52 03.7123582680 +11 58 08.883798420   17.68 16.73     ~ 11 0
64 Cl* NGC 2682 SAND 1500 V* 08 52 07.3194575256 +12 02 50.861176728   16.74 16.080     ~ 6 0
65 Cl* NGC 2682 FBC 4804 V* 08 52 07.7416716096 +12 02 54.405710988   16.62 15.859     ~ 6 0
66 Cl* NGC 2682 SAND 1454 * 08 52 08.6216099040 +11 48 15.854392908 14.328 14.34 13.862   13.089 F7V 10 0
67 G 41-3 PM* 08 52 10.1968305562 +12 02 53.500949608       11.742   K4 20 0

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