2017AcA....67..203R


Query : 2017AcA....67..203R

2017AcA....67..203R - Acta Astron., 67, 203-224 (2017/August-0)

The Cluster AgeS Experiment (CASE). Variable Stars in the Field of the Globular Cluster M22.

ROZYCZKA M., THOMPSON I.B., PYCH W., NARLOCH W., POLESKI R. and SCHWARZENBERG-CZERNY A.

Abstract (from CDS):

The field of the globular cluster M22 (NGC 6656) was monitored between 2000 and 2008 in a search for variable stars. BV light curves were obtained for 359 periodic, likely periodic, and long-term variables, 238 of which are new detections. 39 newly detected variables, and 63 previously known ones are members or likely members of the cluster, including 20 SX Phe, 10 RRab and 16 RRc type pulsators, one BL Her type pulsator, 21 contact binaries, and 9 detached or semi-detached eclipsing binaries. The most interesting among the identified objects are V112 - a bright multimode SX Phe pulsator, V125 - a β Lyr type binary on the blue horizontal branch, V129 - a blue/yellow straggler with a W UMa-like light curve, located halfway between the extreme horizontal branch and red giant branch, and V134 - an extreme horizontal branch object with P =2.33 d and a nearly sinusoidal light curve. All four of them are proper motion members of the cluster. Among nonmembers, a P =2.83 d detached eclipsing binary hosting a δ Sct type pulsator was found, and a peculiar P =0.93 d binary with ellipsoidal modulation and narrow minimum in the middle of one of the descending shoulders of the sinusoid. We also collected substantial new data for previously known variables. In particular we revise the statistics of the occurrence of the Blazhko effect in RR Lyr type variables of M22.

Abstract Copyright:

Journal keyword(s): globular clusters: individual: M22 - Stars: variables: general - blue stragglers - binaries: eclipsing

Nomenclature: Table 1: Cl* NGC 6656 SAW VNNN (Nos V102-V140) added, [RTP2017] UNN (Nos U1-U69), [RTP2017] NNNN (Nos N1-N175).

CDS comments: Objects #NN probably Cl* NGC 6656 SAW VNN in SIMBAD. Objects OGLE BLG- or OGLE GD- not in SIMBAD.

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 - 2022
#notes
1 NGC 2808 GlC 09 12 03.10 -64 51 48.6           ~ 1346 0
2 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 805 0
3 M 53 GlC 13 12 55.25 +18 10 05.4   8.95 7.79     ~ 780 0
4 V* T CrB Sy* 15 59 30.1622265912 +25 55 12.613382940   11.516 10.247 9.70   M3IIIe_sh 679 0
5 [BPH2004] CX 1 CV* 16 23 34.14 -26 31 33.7           ~ 9 1
6 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1772 0
7 * R Ara EB* 16 39 44.72575 -56 59 39.9217           B5V+F1IV 72 0
8 NGC 6362 GlC 17 31 54.99 -67 02 54.0   9.72 8.86     ~ 542 0
9 [RTP2017] N10 Pu* 18 35 52.9868723184 -24 03 57.013911072   15.87 15.35     ~ 1 0
10 [RTP2017] U44 V* 18 35 54.4193999256 -24 03 50.538667392   20.20 18.95     ~ 1 0
11 Cl* NGC 6656 SAW V125 HB* 18 35 57.4839499147 -23 47 59.191964818   14.779 14.448   13.966 ~ 4 0
12 [RTP2017] U53 EB* 18 35 57.5987954856 -23 43 37.068497184   17.48 16.70     ~ 1 0
13 [RTP2017] N44 EB* 18 35 57.7718732328 -23 45 17.622273708   16.78 15.91     ~ 1 0
14 [RTP2017] U62 EB* 18 35 59.1564701592 -23 55 11.899094484   17.60 16.76     ~ 1 0
15 Cl* NGC 6656 SAW V39 * 18 36 09.7285886568 -23 59 35.600150796           ~ 2 0
16 OGLE BLG-ECL-423107 EB* 18 36 09.9911693704 -23 51 57.971863490     17.328   16.354 ~ 5 0
17 V* V3855 Sgr LP* 18 36 10.1063206008 -24 05 49.253143092   12.70 11.31     ~ 7 0
18 OGLE BLG-ECL-423112 EB* 18 36 11.5936166568 -23 48 12.540578040   18.14 17.253   16.130 ~ 3 0
19 OGLE BLG-ECL-423130 EB* 18 36 15.6368814408 -23 58 29.233071660   17.24 16.514   15.532 ~ 3 0
20 OGLE BLG-RRLYR-36668 RR* 18 36 16.1452164240 -23 47 15.157938084   14.65 14.11 13.986 13.35 kA4hF1.5 8 0
21 Cl* NGC 6656 SAW V117 V* 18 36 16.1649767760 -23 56 11.111399880   16.80 15.84     ~ 1 0
22 OGLE BLG-ECL-423136 EB* 18 36 16.63 -23 55 58.1   17.03 17.004   16.875 ~ 3 0
23 Cl* NGC 6656 KT V33 V* 18 36 16.86 -23 53 54.5           ~ 3 0
24 Cl* NGC 6656 SAW V130 EB* 18 36 17.5891309464 -23 57 14.469127812   17.24 16.63     ~ 1 0
25 OGLE BLG-RRLYR-36669 RR* 18 36 18.2478840423 -23 56 03.620716454 14.91 14.80 14.10   13.14 ~ 6 0
26 OGLE BLG-RRLYR-36671 RR* 18 36 20.5875595752 -23 52 17.396059584 15.06 14.75 14.19   13.33 kA6.5hF2 7 0
27 Cl* NGC 6656 SAW V129 EB* 18 36 21.2306085190 -23 51 37.505299187   16.32 15.80     ~ 1 0
28 OGLE BLG-ECL-423150 EB* 18 36 21.7621009656 -23 58 25.141063872     19.401   18.174 ~ 4 0
29 Cl* NGC 6656 PK 5 EB* 18 36 22.26 -23 54 32.9           ~ 2 0
30 OGLE BLG-RRLYR-36672 RR* 18 36 23.0261549472 -23 54 41.560825500 15.36 14.93 14.28   13.32 ~ 8 0
31 Cl* NGC 6656 KT V26 RR* 18 36 23.16 -23 53 24.0 15.00 14.74 14.12   13.29 ~ 3 0
32 OGLE BLG-ECL-423159 EB* 18 36 23.8359599208 -23 51 16.419136680     16.422   15.740 ~ 5 0
33 M 22 GlC 18 36 23.94 -23 54 17.1   7.16 6.17     ~ 1306 0
34 Cl* NGC 6656 SAW V24 * 18 36 24.04 -23 54 29.4 14.1 13.1 11.3   9.3 ~ 6 1
35 Cl* NGC 6656 SAW V131 EB* 18 36 24.1823043648 -23 54 26.898039000   16.43 16.00     ~ 1 0
36 OGLE BLG-ECL-423166 EB* 18 36 24.2826509568 -23 56 18.983491692     17.531   16.390 ~ 6 0
37 [RTP2017] U50 EB* 18 36 25.0838273808 -23 56 53.712398400   19.44 18.29     ~ 1 0
38 Cl* NGC 6656 SAW V112 Pu* 18 36 25.3506840264 -23 54 01.371738564   16.42 15.73     ~ 1 0
39 OGLE BLG-ECL-423175 EB* 18 36 26.0863434408 -23 51 26.989828704     16.567   15.954 ~ 4 0
40 [RTP2017] N4 Pu* 18 36 27.2513976846 -23 47 33.787915716   17.05 16.45     ~ 1 0
41 [RTP2017] N11 dS* 18 36 27.9677982312 -23 49 41.980997280   16.97 16.45     ~ 1 0
42 OGLE BLG-ECL-423192 EB* 18 36 30.87 -23 53 46.3     17.219   16.206 ~ 5 0
43 OGLE BLG-RRLYR-36680 RR* 18 36 32.0825056560 -23 55 40.896231456 14.98 14.84 14.21   13.34 ~ 6 0
44 [RTP2017] N12 dS* 18 36 34.6121529264 -24 00 43.640913492   14.32 13.71     ~ 1 0
45 OGLE BLG-ECL-423203 EB* 18 36 34.6668240744 -23 52 31.270032336     17.345   16.497 ~ 5 0
46 Cl* NGC 6656 SAW V116 V* 18 36 34.69 -23 57 52.5   20.90 19.74     ~ 1 0
47 Cl* NGC 6656 SAW V40 * 18 36 34.8173797176 -23 47 23.321798448           ~ 2 0
48 OGLE BLG-RRLYR-36681 RR* 18 36 34.9129698144 -23 53 06.567242352 14.81 14.79 14.10   13.19 ~ 6 0
49 Cl* NGC 6656 KT V51 V* 18 36 35.08 -23 53 03.6           ~ 2 0
50 OGLE BLG566.10 5807 EB* 18 36 35.67 -23 55 15.3     19.879   18.626 ~ 5 0
51 OGLE BLG-ECL-423211 EB* 18 36 36.8550870624 -23 57 00.741864312     17.556   16.363 ~ 5 0
52 Cl* NGC 6656 SAW V133 EB* 18 36 37.3082841288 -23 53 38.954600124   20.09 18.99     ~ 1 0
53 Cl* NGC 6656 SAW V3 RR* 18 36 38.0011471608 -23 47 15.268329960   16.49 15.64   14.69 ~ 6 0
54 [RTP2017] U51 EB* 18 36 39.8808842604 -23 52 18.672537974   20.56 19.67     ~ 1 0
55 [RTP2017] U56 V* 18 36 39.9680938848 -23 50 54.859396200   18.17 17.09     ~ 1 0
56 OGLE BLG-ECL-423217 EB* 18 36 41.8187500584 -23 56 21.212091492     17.320   16.389 ~ 4 0
57 [RTP2017] N107 dS* 18 36 41.9934771048 -24 00 13.943486628   17.33 16.82     ~ 1 0
58 OGLE BLG566.9 65482 RR* 18 36 46.2918549144 -23 48 02.538884772 15.02 14.83 14.18   13.30 kA3.5:hF2.5: 8 0
59 [RTP2017] N121 EB* 18 36 46.8871148280 -23 52 18.728608224   17.60 16.73     ~ 1 0
60 HD 171612 Mi* 18 36 47.1596343720 -23 45 48.199341708   10.34 8.60     M2/3III 10 0
61 [RTP2017] N15 dS* 18 36 48.8544751056 -24 01 49.098853920   17.22 16.793   16.135 ~ 2 0
62 OGLE BLG-ECL-423254 EB* 18 36 50.9521298952 -24 02 31.785908460   18.40 17.716   16.816 ~ 3 0
63 [RTP2017] U61 EB* 18 36 53.5033315632 -23 47 10.645982268   19.98 18.91     ~ 1 0
64 Cl* NGC 6656 SAW V135 EB* 18 36 55.5213262488 -23 55 32.386793556   19.58 18.79     ~ 1 0
65 [RTP2017] N87 V* 18 36 56.0721769392 -23 48 44.223869052   18.50 17.03     ~ 1 0
66 NGC 6971 GiG 20 49 23.7758083224 +05 59 44.125677636   14.8       ~ 22 0
67 NAME Galactic Bulge reg ~ ~           ~ 3939 0

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2022.10.07-13:37:51

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