2012MNRAS.424.2722B

Query : 2012MNRAS.424.2722B

2012MNRAS.424.2722B - Mon. Not. R. Astron. Soc., 424, 2722-2732 (2012/August-3)

Investigation of variable star candidates in the globular cluster NGC 5024 (M53).

BRAMICH D.M., ARELLANO FERRO A., FIGUERA JAIMES R. and GIRIDHAR S.

Abstract (from CDS):

We have performed a careful investigation of the 74 candidate variable stars presented by Safonova & Stalin. For this purpose we used our data base of imaging and light curves from Arellano Ferro et al. We find that two candidates are known variable stars, eight candidates were discovered first by Arellano Ferro et al., but would not have been known to Safonova & Stalin at the time of their paper submission, while four candidates are new variables. Three of the new variables are SX Phe type and one is a semiregular (SR) type red giant variable. We also tentatively confirm the presence of true variability in two other candidates, and we are unable to investigate another four candidates because they are not in our data base. However, we find that the remaining 54 candidate variable stars are spurious detections where systematic trends in the light curves have been mistaken for true variability. We believe that the erroneous detections are caused by the adoption of a very low detection threshold used to identify these candidates.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society 2012 RAS

Journal keyword(s): stars: variables: general - globular clusters: individual: NGC 5024

VizieR on-line data: <Available at CDS (J/MNRAS/424/2722): stars.dat table2.dat>

Simbad objects: 91

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Number of rows : 91
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 [SS2011] W1 EB? 13 12 43.70 +18 10 09.0       19.495   ~ 2 0
2 Cl* NGC 5024 SAW V33 RR* 13 12 43.8614927160 +18 10 12.913338396       17.090   ~ 17 0
3 Cl* NGC 5024 RLB 928 RR* 13 12 45.3858072792 +18 09 01.927039464           ~ 20 0
4 [SS2011] RR1 RR* 13 12 45.40 +18 09 04.1       19.862   ~ 2 0
5 [SS2011] RR6 RR? 13 12 47.13 +18 10 29.0       20.209   ~ 2 0
6 [SS2011] SX3 SX* 13 12 48.27 +18 14 34.6     18.76 18.7855 18.45 ~ 4 0
7 [SS2011] SX2 SX* 13 12 48.29 +18 13 18.9     19.59 19.6018 19.38 ~ 5 0
8 Cl* NGC 5024 SAW V18 RR* 13 12 48.6796028592 +18 10 13.079658036       19.567   ~ 14 0
9 [SS2011] SX4 SX* 13 12 48.69 +18 10 10.2       19.4494   ~ 3 0
10 Cl* NGC 5024 SAW V78 SX* 13 12 49.87 +18 08 56.1       18.1171   ~ 5 0
11 Cl* NGC 5024 SAW V83 * 13 12 50.10 +18 07 42.9       18.749   ~ 4 0
12 Cl* NGC 5024 SAW V42 RR* 13 12 50.5527590472 +18 10 19.941037068       18.499   ~ 19 0
13 [SS2011] VC3 BS* 13 12 50.66 +18 09 39.3       18.298   ~ 2 0
14 [SS2011] W2 EB? 13 12 51.07 +18 11 11.9       20.522   ~ 2 0
15 [SS2011] W3 EB? 13 12 51.41 +18 09 37.4       19.846   ~ 2 0
16 [SS2011] SX7 V* 13 12 51.74 +18 10 33.8       19.6519   ~ 2 0
17 [SS2011] SX8 SX* 13 12 52.03 +18 09 53.6       18.7416   ~ 4 0
18 [SS2011] VC5 V* 13 12 52.26 +18 10 21.3       18.975   ~ 2 0
19 [SS2011] VC6 V* 13 12 52.45 +18 09 37.3       18.862   ~ 2 0
20 [SS2011] VC7 V* 13 12 52.50 +18 10 13.6       19.127   ~ 2 0
21 Cl* NGC 5024 SAW V64 RR* 13 12 52.5229024104 +18 10 12.425633544           ~ 10 0
22 [SS2011] VC8 V* 13 12 52.83 +18 10 00.8       18.828   ~ 2 0
23 [SS2011] SX9 1 SX* 13 12 52.91 +18 10 35.8     18.46 18.5738 18.44 ~ 4 0
24 [SS2011] SX9 BS? 13 12 52.99 +18 10 35.4       19.6975   ~ 2 0
25 Cl* NGC 5024 SAW V43 RR* 13 12 53.0856927234 +18 10 55.380698938           ~ 18 0
26 [SS2011] VC28 BS* 13 12 53.09 +18 10 08.7       19.077   ~ 2 0
27 [SS2011] W5 EB? 13 12 53.21 +18 09 47.3       18.520   ~ 2 0
28 [SS2011] VC10 V* 13 12 53.61 +18 09 54.4       17.603   ~ 3 0
29 [SS2011] SX11 SX* 13 12 53.65 +18 08 57.9     19.21 19.3140 19.03 ~ 5 0
30 [SS2011] RR3 RR* 13 12 53.82 +18 09 18.7       18.154   ~ 2 0
31 [SS2011] SX12 V* 13 12 53.89 +18 09 13.2       19.4074   ~ 2 0
32 [SS2011] W4 EB? 13 12 53.98 +18 09 49.0       19.339   ~ 2 0
33 [SS2011] RR4 RR* 13 12 54.03 +18 09 11.4       19.092   ~ 2 0
34 [SS2011] VC11 RR? 13 12 54.2935104739 +18 10 31.382520445       18.693   ~ 4 0
35 [SS2011] SX13 V* 13 12 54.52 +18 09 32.6       19.4671   ~ 2 0
36 Cl* NGC 5024 SAW V46 RR* 13 12 54.5370535762 +18 10 37.006020536           ~ 18 0
37 [SS2011] RR7 RR? 13 12 54.58 +18 09 45.4       18.076   ~ 2 0
38 [SS2011] SX14 SX* 13 12 54.76 +18 09 37.7     18.58 18.6844 18.26 ~ 4 0
39 [SS2011] VC12 V* 13 12 54.76 +18 10 10.4       17.858   ~ 2 0
40 [SS2011] VC21 CV? 13 12 55.07 +18 09 27.9       19.203   ~ 2 0
41 Cl* NGC 5024 SAW V45 RR* 13 12 55.1600974464 +18 09 27.363295080           ~ 19 0
42 M 53 GlC 13 12 55.25 +18 10 05.4     7.79     ~ 907 0
43 [SS2011] VC13 BS* 13 12 55.32 +18 10 21.7       17.240   ~ 2 0
44 [SS2011] VC14 V* 13 12 55.42 +18 10 39.0       19.128   ~ 2 0
45 [SS2011] RR14 RR* 13 12 55.52 +18 09 36.9       19.092   ~ 2 0
46 [SS2011] V80 7 V* 13 12 55.53 +18 09 56.9       19.575   ~ 2 0
47 Cl* NGC 5024 KRA 8 RR* 13 12 55.5601859088 +18 09 58.259548224       16.702   ~ 12 0
48 Cl* NGC 5024 KRA 9 RR* 13 12 55.5977644752 +18 09 30.930057576           ~ 12 0
49 [SS2011] VC15 BS* 13 12 55.71 +18 09 57.0       18.465   ~ 2 0
50 Cl* NGC 5024 KRA 3 RR* 13 12 55.806 +18 10 36.02       17.278   ~ 11 0
51 Cl* NGC 5024 SAW V40 RR* 13 12 55.8607307784 +18 11 54.667442148           ~ 14 0
52 Cl* NGC 5024 SAW V72 RR* 13 12 55.9403616102 +18 09 52.232262368           ~ 8 0
53 [SS2011] VC17 BS* 13 12 56.05 +18 09 59.5       18.465   ~ 2 0
54 [SS2011] RR8 RR* 13 12 56.18 +18 11 55.6       18.748   ~ 2 0
55 Cl* NGC 5024 SAW V63 RR* 13 12 56.2988126640 +18 10 00.715890972           ~ 9 0
56 [SS2011] RR13 RR* 13 12 56.33 +18 10 56.3       19.166   ~ 2 0
57 [SS2011] SX15 V* 13 12 56.34 +18 11 54.2       20.4167   ~ 2 0
58 Cl* NGC 5024 RLB 469 RR* 13 12 56.3408877360 +18 07 13.760968764     16.971   16.392 ~ 23 0
59 [SS2011] SX16 SX* 13 12 56.37 +18 11 05.4       17.9848   ~ 3 0
60 [SS2011] VC18 V* 13 12 56.38 +18 10 52.1       20.064   ~ 2 0
61 [SS2011] VC19 V* 13 12 56.43 +18 10 57.7       20.145   ~ 2 0
62 Cl* NGC 5024 SAW V82 * 13 12 56.50 +18 13 10.0       18.864   ~ 4 0
63 [SS2011] RR12 RR* 13 12 56.51 +18 07 16.0       19.829   ~ 2 0
64 Cl* NGC 5024 SAW V68 RG* 13 12 56.5708094016 +18 08 23.084391372     13.85     ~ 4 0
65 [SS2011] VC20 V* 13 12 56.590 +18 10 48.30     15.09 16.591   ~ 3 0
66 [SS2011] W8 EB? 13 12 56.66 +18 08 18.7       19.999   ~ 2 0
67 [SS2011] SX17 SX* 13 12 57.17 +18 09 41.9       18.0077   ~ 4 0
68 [SS2011] RR11 RR* 13 12 57.23 +18 11 02.3       18.794   ~ 2 0
69 [SS2011] SX25 SX* 13 12 57.37 +18 10 15.3       19.1302   ~ 3 0
70 Cl* NGC 5024 SAW V80 SX* 13 12 57.40 +18 10 15.2       17.915   ~ 5 0
71 [SS2011] W6 EB? 13 12 57.46 +18 10 29.6       19.641   ~ 2 0
72 Cl* NGC 5024 KRA 1 RR* 13 12 57.5888398268 +18 10 49.537736038       19.842   ~ 10 0
73 [SS2011] SX24 SX* 13 12 57.64 +18 10 43.0       18.4832   ~ 4 0
74 [SS2011] VC25 V* 13 12 58.02 +18 09 06.8       19.779   ~ 2 0
75 [SS2011] VC26 EB? 13 12 58.03 +18 09 03.1       18.130   ~ 2 0
76 [SS2011] VC27 V* 13 12 58.07 +18 09 23.5       18.703   ~ 2 0
77 [SS2011] SX19 SX* 13 12 58.32 +18 08 41.2     19.48 19.3035 19.17 ~ 4 0
78 [SS2011] RR10 RR? 13 12 58.38 +18 09 59.5       18.560   ~ 2 0
79 [SS2011] RR9 RR? 13 12 58.51 +18 10 41.3       19.848   ~ 2 0
80 [SS2011] W9 SX* 13 12 59.00 +18 10 22.0     19.34 19.369 19.17 ~ 4 0
81 [SS2011] SX21 SX* 13 12 59.51 +18 11 17.4       19.5682   ~ 3 0
82 [SS2011] SX20 V* 13 12 59.53 +18 09 17.5       18.7493   ~ 2 0
83 [SS2011] VC22 CV? 13 12 59.98 +18 09 24.8       19.439   ~ 2 0
84 Cl* NGC 5024 RLB 884 RR* 13 13 00.0765218640 +18 09 25.053246180           ~ 18 0
85 ZTF J131301.01+181009.5 LP* 13 13 01.0228571664 +18 10 09.553093176     14.08     ~ 9 0
86 [SS2011] W11 EB? 13 13 01.04 +18 10 01.6       19.881   ~ 2 0
87 [SS2011] RR5 RR* 13 13 01.33 +18 10 15.9       19.686   ~ 2 0
88 [SS2011] SX22 SX* 13 13 01.92 +18 12 30.4     19.61 19.5604 19.30 ~ 4 0
89 Cl* NGC 5024 SAW V81 SX* 13 13 02.6954185896 +18 06 29.630717424   16.6 17.454 16.3 16.639 ~ 4 0
90 [SS2011] SX23 V* 13 13 04.21 +18 10 59.4       19.6818   ~ 2 0
91 [SS2011] W13 EB? 13 13 11.43 +18 10 34.2       20.383   ~ 2 0

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