2016A&A...588A.128F

Query : 2016A&A...588A.128F

2016A&A...588A.128F - Astronomy and Astrophysics, volume 588A128-128 (2016/4-1)

Exploring the crowded central region of ten Galactic globular clusters using EMCCDs.

FIGUERA JAIMES R., BRAMICH D.M., SKOTTFELT J., KAINS N., JORGENSEN U.G., HORNE K., DOMINIK M., ALSUBAI K.A., BOZZA V., CALCHI NOVATI S., CICERI S., D'AGO G., GALIANNI P., GU S.-H., HARPSOE K.B.W., HAUGBOLLE T., HINSE T.C., HUNDERTMARK M., JUNCHER D., KORHONEN H., MANCINI L., POPOVAS A., RABUS M., RAHVAR S., SCARPETTA G., SCHMIDT R.W., SNODGRASS C., SOUTHWORTH J., STARKEY D., STREET R.A., SURDEJ J., WANG X.-B. and WERTZ O.

Abstract (from CDS):

Aims. We aim to obtain time-series photometry of the very crowded central regions of Galactic globular clusters; to obtain better angular resolution thanhas been previously achieved with conventional CCDs on ground-based telescopes; and to complete, or improve, the census of the variable star population in those stellar systems.
Methods. Images were taken using the Danish 1.54-m Telescope at the ESO observatory at La Silla in Chile. The telescope was equipped with an electron-multiplying CCD, and the short-exposure-time images obtained (ten images per second) were stacked using the shift-and-add technique to produce the normal-exposure-time images (minutes). Photometry was performed via difference image analysis. Automatic detection of variable stars in the field was attempted.
Results. The light curves of 12541 stars in the cores of ten globular clusters were statistically analysed to automatically extract the variable stars. We obtained light curves for 31 previously known variable stars (3 long-period irregular, 2 semi-regular, 20 RR Lyrae, 1 SX Phoenicis, 3 cataclysmic variables, 1 W Ursae Majoris-type and 1 unclassified) and we discovered 30 new variables (16 long-period irregular, 7 semi-regular, 4 RR Lyrae, 1 SX Phoenicis and 2 unclassified). Fluxes and photometric measurements for these stars are available in electronic form through the Strasbourg astronomical Data Center.

Abstract Copyright: © ESO, 2016

Journal keyword(s): blue stragglers - galaxies: star clusters: general - globular clusters: general - stars: variables: RR Lyrae - novae, cataclysmic variables - instrumentation: high angular resolution

VizieR on-line data: <Available at CDS (J/A+A/588/A128): stars.dat table1.dat>

Nomenclature: Table 4: [FBS2016] NGC104 EMN N=7 (Nos EM1-EM7). Table 5: Cl* NGC 5139 SAW VNNN N=3 (Nos V457-V459) added. Table 6: Cl* NGC 5286 SAW VNN N=11 (Nos V63-V73) added, Table 7: Cl* NGC 6093 SAW VNN N=7 (Nos V34-V40) added. Table 9: Cl* NGC 6541 SAW VNN N=2 (Nos V21-V22) added, Table 11: Cl* NGC 6681 SAW VN N=1 (No V6) added.

CDS comments: Paragraph 8.4.1: V11 probably Cl* NGC 6093 DN 1. Paragraph 8.5: V81 = [KTR2013] V58 = Cl* NGC 6121 SAW V81 and V101 = [NBH2014] 3487 = Cl* NGC 6121 SAW V101. For objects Cl* NGC 5286 SAW V37 to V58, there is a ∼6 arcsec difference between coordinates from 2016A&A...588A.128F and coordinates from 2010AJ....139..357Z.

Simbad objects: 79

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Number of rows : 79
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 104 R 4 LP* 00 24 02.5117061396 -72 05 07.392666529   14.196 11.486   9.347 ~ 15 0
2 [MSS2012] 30 LP* 00 24 02.733 -72 05 02.80   13.648 11.774   10.664 ~ 2 0
3 2MASS J00240305-7204554 LP* 00 24 03.0875485584 -72 04 55.066919664   13.479 11.511   10.337 ~ 3 0
4 2MASS J00240317-7204507 LP* 00 24 03.1685651784 -72 04 50.670902280   13.475 11.465   10.086 ~ 7 0
5 2MASS J00240398-7205100 LP* 00 24 04.0016810136 -72 05 10.035934224   13.688 11.498   9.595 ~ 8 0
6 2MASS J00240514-7204542 LP* 00 24 05.1084294559 -72 04 54.371383366   13.431 11.540   10.419 ~ 3 0
7 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
8 Cl* NGC 104 DPF 1286 V* 00 24 05.921 -72 04 45.20 16.394   16.076   15.679 ~ 8 0
9 Cl* NGC 104 SBG V3 CV* 00 24 06.2943986812 -72 04 45.361338815   13.429 10.622   9.316 ~ 34 0
10 [FBS2016] NGC104 EM4 LP* 00 24 07.203 -72 04 46.45         13.89 ~ 1 0
11 Cl* NGC 104 SAW V38 XB* 00 24 07.885 -72 05 02.00 17.085   16.761   16.259 ~ 10 0
12 [FBS2016] NGC104 EM3 LP* 00 24 08.3367093816 -72 04 50.668614588   13.493 11.503   10.163 ~ 2 0
13 Cl* NGC 104 AGBWF 2-34 LP* 00 24 08.406 -72 04 35.91 15.607   12.266   11.063 ~ 2 0
14 Cl* NGC 5139 SAW V457 RR* 13 26 46.246 -47 28 44.81         15.82 ~ 5 0
15 Cl* NGC 5139 SAW V458 RR* 13 26 46.3159618405 -47 28 58.023821482           ~ 4 0
16 2MASS J13264631-4728402 LP* 13 26 46.3220464584 -47 28 40.384802676   14.307     10.952 ~ 4 0
17 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
18 Cl* NGC 5286 SAW V70 LP* 13 46 24.3394051152 -51 22 47.175779496         11.57 ~ 1 0
19 [ZCS2010] NV32 RR* 13 46 25.112 -51 22 24.34         15.97 ~ 2 0
20 [ZCS2010] NV31 RR* 13 46 25.403 -51 22 25.79         15.91 ~ 2 0
21 Cl* NGC 5286 SAW V63 BS* 13 46 25.405 -51 22 44.92         18.52 ~ 1 0
22 Cl* NGC 5286 SAW V39 RR* 13 46 25.4565254067 -51 22 46.904742123         15.57 ~ 3 0
23 Cl* NGC 5286 SAW V69 LP* 13 46 25.869 -51 22 16.18         12.26 ~ 1 0
24 [ZCS2010] NV26 RR* 13 46 25.984 -51 22 30.32         15.71 ~ 3 0
25 Cl* NGC 5286 SAW V67 LP* 13 46 26.121 -51 22 23.76         12.29 ~ 1 0
26 2MASS J13462619-5122265 LP* 13 46 26.1884435415 -51 22 26.636357830         11.87 ~ 2 0
27 [ZCS2010] NV17 RR* 13 46 26.577 -51 22 42.92         15.88 ~ 2 0
28 [ZCS2010] NV34 RR* 13 46 26.627 -51 22 19.29         15.65 ~ 2 0
29 [ZCS2010] NV19 RR* 13 46 26.730 -51 22 38.08         15.47 ~ 2 0
30 Cl* NGC 5286 SAW V65 RR* 13 46 26.763 -51 22 28.93         15.35 ~ 1 0
31 Cl* NGC 5286 SAW V64 RR* 13 46 26.780 -51 22 26.60         15.72 ~ 1 0
32 NGC 5286 GlC 13 46 26.81 -51 22 27.3           ~ 485 0
33 [ZCS2010] NV16 RR* 13 46 26.917 -51 22 44.21         15.76 ~ 3 0
34 Cl* NGC 5286 SAW V73 LP* 13 46 27.008 -51 22 29.88         11.51 ~ 1 0
35 2MASS J13462715-5122400 LP* 13 46 27.1647502648 -51 22 40.245525682         12.06 ~ 2 0
36 [ZCS2010] NV13 RR* 13 46 27.275 -51 22 51.63         15.92 ~ 2 0
37 Cl* NGC 5286 SAW V72 LP* 13 46 27.3638095032 -51 22 16.306357728         11.64 ~ 2 0
38 [ZCS2010] NV22 RR* 13 46 27.470 -51 22 33.93         15.52 ~ 3 0
39 2MASS J13462765-5122353 LP* 13 46 27.6663549265 -51 22 35.348153050         11.66 ~ 2 0
40 [ZCS2010] NV33 RR* 13 46 27.785 -51 22 20.69         15.75 ~ 3 0
41 V* T Sco No* 16 16 59.7637129856 -22 59 44.681457206       16.266   ~ 72 0
42 Cl* NGC 6093 SAW V10 RR* 16 17 01.1624994144 -22 58 34.704185844   15.2     14.25 ~ 11 0
43 Cl* NGC 6093 SAW V19 RR* 16 17 02.1087381553 -22 58 29.257482933         15.28 ~ 4 0
44 Cl* NGC 6093 DN 1 CV* 16 17 02.2 -22 58 38           ~ 9 0
45 Cl* NGC 6093 SAW V39 LP* 16 17 02.201 -22 58 34.49         11.75 ~ 1 0
46 2MASS J16170231-2258307 LP* 16 17 02.3183194229 -22 58 30.707535894         11.51 ~ 3 0
47 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
48 Cl* NGC 6093 SAW V34 CV* 16 17 02.820 -22 58 33.80         16.44 ~ 1 0
49 Cl* NGC 6093 SAW V17 RR* 16 17 02.8586473906 -22 58 32.798073884         15.31 ~ 4 0
50 Cl* NGC 6093 SAW V40 LP* 16 17 03.042 -22 58 25.72         12.36 ~ 1 0
51 Cl* NGC 6093 SAW V36 LP* 16 17 03.1452712778 -22 58 42.071281289         11.50 ~ 2 0
52 Cl* NGC 6093 SAW V20 RR* 16 17 03.2604629106 -22 58 37.731342742         15.31 ~ 6 0
53 Cl* NGC 6093 SAW V38 LP* 16 17 03.263 -22 58 34.96         11.70 ~ 1 0
54 Cl* NGC 6093 SAW V35 LP* 16 17 03.3117801579 -22 58 33.301400681         11.40 ~ 2 0
55 [BPH2004] CX 1 V* 16 23 34.15 -26 31 34.6     20.38     ~ 14 1
56 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
57 Cl* NGC 6121 SAW V21 RR* 16 23 35.9070859824 -26 31 33.810926844 14.40 13.88 13.19 12.70 12.16 ~ 18 0
58 [NBH2014] 3487 EB* 16 23 36.65 -26 31 43.4           ~ 2 0
59 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
60 [FLD2014] SXP 3 BS* 18 08 01.670 -43 42 52.26     17.20   16.76 ~ 2 0
61 OGLE BLG-RRLYR-56891 RR* 18 08 02.180 -43 42 52.91         14.39 ~ 4 0
62 NGC 6541 GlC 18 08 02.36 -43 42 53.6           ~ 409 0
63 Cl* NGC 6541 SAW V22 LP* 18 08 03.7447039966 -43 42 34.584336536         10.74 ~ 2 0
64 M 22 GlC 18 36 23.94 -23 54 17.1           ~ 1459 0
65 Cl* NGC 6656 SAW V35 LP* 18 36 24.0535695144 -23 54 29.612943936       10.841 9.43 ~ 3 0
66 OGLE BLG-DN-1057 CV* 18 36 24.696 -23 54 35.60     18.77   16.224 ~ 26 0
67 Cl* NGC 6656 PK 6 EB* 18 36 25.228 -23 54 37.44         17.08 ~ 2 0
68 OGLE BLG-RRLYR-65596 RR* 18 43 12.015 -32 17 29.70         15.09 ~ 3 0
69 M 70 GlC 18 43 12.76 -32 17 31.6           ~ 421 0
70 Cl* NGC 6723 SAW V44 RR* 18 59 32.3527824794 -36 37 52.049274941   15.944 15.571   15.08 ~ 5 0
71 Cl* NGC 6723 SAW V35 RR* 18 59 32.9681033424 -36 38 01.542735449   15.846 15.365   14.80 ~ 4 0
72 NGC 6723 GlC 18 59 33.15 -36 37 56.1           ~ 543 0
73 Cl* NGC 6723 SAW V34 RR* 18 59 33.1942608450 -36 37 58.141701170   15.743 15.351   14.85 ~ 4 0
74 Cl* NGC 6723 SAW V8 RR* 18 59 34.678 -36 37 42.33   15.874 15.475   15.08 ~ 4 0
75 Cl* NGC 6752 BRS 2 CV* 19 10 51.511 -59 58 56.85           ~ 18 0
76 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
77 V* RR Lyr RR* 19 25 27.9129605304 +42 47 03.693258204   7.36   7.6   kA3hF0 951 0
78 M 72 GlC 20 53 27.70 -12 32 14.3     8.96     ~ 465 0
79 V* SX Phe SX* 23 46 32.8928138474 -41 34 54.769886474   7.54 7.31     A3V 348 0

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