1998A&AS..128...19K


Query : 1998A&AS..128...19K

1998A&AS..128...19K - Astron. Astrophys., Suppl. Ser., 128, 19-28 (1998/February-2)

The optical gravitational lensing experiment. Variable stars in globular clusters. IV. Fields 104A-E in 47 Tucanae.

KALUZNY J., KUBIAK M., SZYMANSKI M., UDALSKI A., KRZEMINSKI W., MATEO M. and STANEK K.Z.

Abstract (from CDS):

Five fields located close to the center of the globular cluster NGC 104=47 Tuc were surveyed in a search for variable stars. We present V-band light curves for 42 variables. This sample includes 13 RR Lyr stars - 12 of them belong to the Small Magellanic Cloud (SMC) and 1 is a background object from the galactic halo. Twelve eclipsing binaries were identified - 9 contact systems and 3 detached/semi-detached systems. Seven eclipsing binaries are located in the blue straggler region on the cluster color-magnitude diagram (CMD) and four binaries can be considered main-sequence systems. One binary is probably a member of the SMC. Eight contact binaries are likely members of the cluster and one is most probably a foreground star. We show that for the surveyed region of 47 Tuc, the relative frequency of contact binaries is very low as compared with other recently surveyed globular clusters. The sample of identified variables also includes 15 red variables with periods ranging from about 2 days to several weeks. A large fraction of these 15 variables probably belong to the SMC but a few stars are likely to be red giants in 47 Tuc. VI photometry for about 50 000 stars from the cluster fields was obtained as a by product of our survey.

Abstract Copyright:

Journal keyword(s): globular clusters: individual: NGC 104 - star: variables: other - blue stragglers - binaries: eclipsing - HR diagram - Magellanic clouds

VizieR on-line data: <Available at CDS (J/A+AS/128/19): tab1-4 tab5-42 tab43-47>

Nomenclature: Table 4: OGLEGC NNN (Nos 212-255)

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 OGLE SMC-RRLYR-8 RR* 00 20 49.3587795504 -72 03 09.577183356     19.721   19.133 ~ 9 0
2 OGLEGC 212 RR* 00 20 57.40 -72 12 06.2           ~ 3 0
3 [MH95] 79 C* 00 21 04.9042547040 -72 15 23.138410536     17.232   14.569 C 6 0
4 OGLE SMC-RRLYR-12 RR* 00 21 23.9613589128 -72 15 33.809724288     19.761   19.149 ~ 8 0
5 OGLE SMC-ECL- 6234 EB* 00 22 00.6334857696 -72 02 04.007381460     17.938   17.126 ~ 5 0
6 OGLE SMC-RRLYR-27 RR* 00 22 33.3830286024 -72 13 49.682517060     19.654   19.120 ~ 8 0
7 Cl* NGC 104 WSB V96 V* 00 22 40.876 -72 09 22.51           ~ 3 0
8 OGLEGC 215 V* 00 22 40.90 -72 09 23.2           ~ 1 0
9 OGLE SMC-RRLYR-30 RR* 00 22 43.8853563840 -71 57 20.599672104     19.524   18.935 ~ 7 0
10 OGLE SMC-RRLYR-31 RR* 00 22 44.0652005544 -71 51 42.378163272     19.740   19.211 ~ 6 0
11 Cl* NGC 104 WSB V95 EB* 00 22 47.4786983727 -72 13 17.215548633   16.55   15.921   ~ 10 0
12 2MASS J00230698-7201213 LP? 00 23 07.0032310248 -72 01 21.309253896           ~ 2 0
13 Cl* NGC 104 WSB V56 EB* 00 23 15.809 -72 18 53.93           ~ 3 0
14 OGLE SMC-RRLYR-45 RR* 00 23 25.2816166128 -72 19 35.880183300     19.869   19.304 ~ 8 0
15 [MH95] 114 C* 00 23 28.0547499624 -72 26 36.614985468     16.504   14.668 C 6 0
16 OGLEGC 236 V* 00 23 45.56 -71 59 00.9           ~ 1 0
17 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3723 0
18 Cl* NGC 104 WSB V16 V* 00 24 31.7814719822 -72 09 29.468408421           ~ 2 0
19 2MASS J00243486-7152126 V* 00 24 34.87 -71 52 12.7           ~ 1 0
20 OGLEGC 239 V* 00 24 36.40 -71 57 18.5           ~ 1 0
21 Cl* NGC 104 WSB V31 V* 00 24 42.53 -71 59 23.7           ~ 2 0
22 OGLE SMC140.4 14005 EB* 00 24 43.9126153224 -71 47 38.134619916     19.843   19.699 ~ 5 0
23 Cl* NGC 104 WSB V51 EB* 00 24 58.2009112776 -72 22 11.088578928           ~ 3 0
24 OGLEGC 241 V* 00 24 59.5794551040 -71 53 47.701860216           ~ 1 0
25 OGLE SMC140.3 45081 EB* 00 25 00.46 -72 00 02.7     17.651   16.929 ~ 6 0
26 Cl* NGC 104 WSB V15 V* 00 25 06.1908155381 -72 10 23.494779056   16.43   15.217   ~ 3 0
27 Cl* NGC 104 WSB V14 EB* 00 25 11.1617072872 -72 12 14.446663081     15.860     ~ 4 0
28 Cl* NGC 104 WSB V30 EB* 00 25 15.93 -71 56 06.6           ~ 3 0
29 OGLE SMC707.27.032409 EB* 00 25 32.24 -72 01 51.6     19.553   18.404 ~ 5 0
30 Cl* NGC 104 WSB V9 V* 00 25 34.1156366520 -72 09 58.179752280           ~ 2 0
31 Cl* NGC 104 WSB V8 LP* 00 25 38.1673944936 -72 16 37.639667748     17.123   15.285 ~ 3 0
32 V* DY Tuc RR* 00 25 42.0354075840 -72 06 01.485462168     17.604   17.218 ~ 8 0
33 OGLE SMC-RRLYR-98 RR* 00 25 49.66 -71 58 26.7     19.399   18.853 ~ 5 0
34 OGLEGC 231 V* 00 26 02.91 -71 58 20.8           ~ 1 0
35 Cl* NGC 104 WSB V28 V* 00 26 02.920 -72 03 02.94           ~ 2 0
36 Cl* NGC 104 WSB V7 EB* 00 26 08.8627905552 -72 07 01.483751964     15.844 16.032 15.482 ~ 23 0
37 Cl* NGC 104 WSB V5 RR* 00 26 09.4141696440 -72 12 28.723016520     19.737   19.193 ~ 7 0
38 Cl* NGC 104 WSB V6 EB* 00 26 10.5358900021 -72 11 07.774715522     16.461   15.972 ~ 8 0
39 OGLEGC 230 V* 00 26 12.3940234800 -72 02 13.233265692           ~ 3 0
40 Cl* NGC 104 WSB V4 AB? 00 26 19.3666083744 -72 14 02.131464840           ~ 6 0
41 Cl* NGC 104 WSB V12 EB* 00 26 42.9856842310 -72 15 20.734075769     16.728   16.139 ~ 5 0
42 Cl* NGC 104 WSB V13 RR* 00 26 56.8667847408 -72 10 13.284058872     19.470   19.035 ~ 7 0
43 2MASS J00271895-7207037 V* 00 27 18.957 -72 07 03.72           ~ 1 0
44 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10204 1
45 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3231 0
46 Cl* NGC 1104 SAW V3 V* ~ ~           ~ 1 0
47 Cl* NGC 1104 SAW V9 V* ~ ~           ~ 1 0

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2022.05.26-17:29:01

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