NGC 6584 / C1814-522
RA: 18:18:37.60 DEC: -52:12:56.8 (J2000)
(Most recent updates:
Membership probability flag - 2024; Remaining data - May 2014)
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Bytes Format Explanation
1-8 A8 Star ID
10-32 A11,1x,A11 Position
34-35 A2 Membership probability flag based on data published
by Prudil & Arellano Ferro (2024)
m1: prob >=0.85; m2: prob >=0.7 and <0.85;
m3: prob >= 0.5 and <0.7; f: prob <0.5
u: no data available
37-44 F8.4 Period (days)
46-51 F6.3 Mean magnitude (or maximum magnitude if "max"
is indicated in the remarks column)
53-57 F5.3 Light amplitude (range of variability)
59 A1 Colour for mean magnitude and amplitude
e.g. B, V, R, I, J, K
or P (for photographic).
61-65 A5 Type of variable (draft 2006 GCVS classifications)
CST denotes non variable stars previously designated
as variables
67-80 A19 Notes and Remarks (f denotes field star)
"--" or "----" indicates no data available
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ID Position Mem Period <mag> ampl C Type Notes/
RA Dec Flag Remarks
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1 18:18:28.82 -52:13:27.0 m1 0.4952 16.45 1.30 B RR0
2 18:18:42.20 -52:12:30.0 m1 0.5447 16.35 1.30 B RR0
3 18:18:42.14 -52:13:16.2 u 0.4716 16.15 1.50 B RR0
4 18:18:40.30 -52:13:25.5 m1 0.5438 16.50 1.40 B RR0
5 18:18:40.49 -52:13:29.1 m1 0.2973 16.60 1.00 B RR1
6 18:18:34.45 -52:12:07.8 m1 0.6262 16.50 0.80 B RR0
7 18:19:01.34 -52:11:55.3 m1 0.5475 16.50 1.20 B RR0
8 18:18:55.62 -52:13:35.3 m1 0.3051 16.50 0.80 B RR1
9 18:18:43.55 -52:12:02.7 m1 0.4951 16.05 2.10 B RR0
10 18:18:37.07 -52:11:36.7 m1 0.6943 16.35 1.10 B RR0
11 18:18:35.42 -52:13:10.8 m1 0.5395 16.40 1.40 B RR0
12 18:18:35.84 -52:12:32.6 m1 0.5951 15.50 0.80 B RR0 blend?
13 18:18:35.85 -52:14:32.3 m1 0.3455 16.50 0.80 B RR1
14 18:18:41.20 -52:13:43.2 m1 0.5995 16.30 1.40 B RR0
15 18:18:23.56 -52:12:41.9 m1 0.6363 15.00 0.60 B RR0 Note;blend?
16 18:18:42.04 -52:12:58.6 m1 0.5822 16.25 1.10 B RR0
17 18:18:41.87 -52:13:22.3 u 0.5634 16.35 1.30 B RR0
18 18:18:32.99 -52:13:18.3 m1 0.5579 16.20 1.00 B RR0
19 18:18:40.66 -52:13:06.4 m1 0.5422 15.60 0.60 B RR0
20 18:18:28.15 -52:12:57.9 m1 0.5253 16.65 0.70 B RR0
21 18:18:34.48 -52:13:55.1 m1 0.5403 16.35 1.30 B RR0
22 18:18:38.02 -52:12:50.5 m1 0.5556 17.00 1.20 B RR0
23 18:18:30.76 -52:13:10.0 m1 0.5981 16.20 0.80 B RR0
24 18:19:24.72 -52:18:50.1 u 0.3086 15.05 0.90 B RR1 f;M&L
25 18:18:56.91 -52:11:12.8 m1 0.4534 16.40 1.60 B RR0
26 18:18:33.62 -52:13:52.1 m1 0.5697 16.25 1.10 B RR0
27 18:19:02.24 -52:22:46.1 u ---- 18.10 0.80 B EB f;M&L
28 18:18:48.09 -52:12:19.8 m1 0.4982 16.40 1.40 B RR0
29 18:18:41.49 -52:11:40.5 m1 0.6072 16.35 1.30 B RR0
30 18:18:42.85 -52:09:31.9 m1 0.5138 16.40 1.60 B RR0
31 18:18:30.61 -52:13:38.5 m1 0.5683 16.25 1.30 B RR0
32 18:18:40.71 -52:14:05.4 m1 0.5952 16.40 1.40 B RR0
33 18:18:28.85 -52:13:37.3 m1 0.2860 16.35 0.90 B RR1 Note
34 18:18:30.03 -52:12:46.2 m1 0.7801 16.60 0.40 B RR0 Note
35 18:18:36.82 -52:12:48.4 m1 0.5555 16.45 0.70 B RR0
36 18:18:38.94 -52:14:00.2 m1 0.5245 16.45 1.90 B RR0
37 18:18:26.06 -52:14:28.1 m1 0.2979 16.50 1.00 B RR1
38 18:18:26.81 -52:11:55.1 m1 0.5516 16.40 1.40 B RR0
39 18:18:19.48 -52:10:47.2 f 0.3314 15.50 0.60 B EC Note
40 18:18:18.62 -52:18:35.0 u 0.5970 16.60 1.20 B RR0 M&L
41 18:18:40.70 -52:13:04.9 m1 0.6399 16.00 1.00 B RR0
42 18:18:39.88 -52:11:55.3 m1 0.5768 16.55 1.50 B RR0
43 18:18:03.70 -52:05:20.7 u 0.5540 16.55 1.30 B RR0 f?;M&L
44 18:19:11.24 -52:05:52.1 u 0.4920 16.40 1.60 B RR0 f?;M&L
45 18:18:28.75 -52:12:30.8 f 0.5082 16.20 1.40 B RR0
46 18:18:25.08 -52:12:35.3 m1 0.5256 16.40 1.20 B RR0
47 18:18:38.32 -52:13:20.8 m1 0.2767 16.70 1.00 B RR1
48 18:18:38.55 -52:13:26.1 m1 0.3071 16.65 1.10 B RR1
49 18:18:06.83 -52:12:25.0 u 0.2553 -- -- EC
50 18:18:19.26 -52:12:38.3 m1 0.2930 -- -- RR1
51 18:18:27.84 -52:12:59.4 m1 0.7520 -- -- RR0
52 18:18:27.99 -52:12:55.7 f 0.5238 -- -- RR0
53 18:18:28.19 -52:14:07.0 m1 0.3472 -- -- RR1
54 18:18:32.16 -52:14:43.2 m1 0.6441 -- -- RR0
55 18:18:32.79 -52:12:24.7 f 0.5658 -- -- RR0
56 18:18:33.14 -52:10:15.5 m1 0.3081 -- -- RR1
57 18:18:34.47 -52:12:49.1 m1 0.2648 -- -- RR2?
58 18:18:35.57 -52:13:31.4 m1 0.6393 -- -- RR0
59 18:18:35.66 -52:12:20.6 m1 ---- -- -- Lb
60 18:18:35.67 -52:13:07.1 f 0.5839 -- -- RR0
61 18:18:37.69 -52:13:59.8 m1 ---- -- -- Lb
62 18:18:37.79 -52:13:06.2 m1 ---- -- -- Lb
63 18:18:38.16 -52:12:54.8 f 0.5374 -- -- RR0
64 18:18:38.42 -52:12:56.0 f 0.6363 -- -- RR0
65 18:18:38.58 -52:12:21.4 m1 0.4964 -- -- RR0
66 18:18:38.77 -52:13:14.1 m1 0.3418 -- -- RR1
67 18:18:39.48 -52:14:32.8 m1 0.5857 -- -- RR0
68 18:18:39.93 -52:11:21.3 m1 0.3172 -- -- RR1
69 18:18:40.01 -52:13:09.1 m1 0.3091 -- -- RR1
70 18:18:40.81 -52:10:32.5 m1 0.3363 -- -- RR1
71 18:18:41.98 -52:12:53.7 m1 0.5574 -- -- RR0
72 18:18:42.72 -52:12:28.9 m1 0.2737 -- -- RR1
73 18:18:44.98 -52:08:10.7 f 0.2469 -- -- EC
74 18:18:51.42 -52:13:30.8 f 0.4636 -- -- EC
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Supplementary Notes
The two main studies of the variables in NGC 6584 are by Millis & Liller
(1980) and by Toddy et al. (2012).
Millis & Liller discovered variables V2-48 and carried out a photographic
study of V1-48.
Toddy et al. applied the image substraction technique to a set of images
obtained on 8 nights in May, June, July 2011. They discovered 26 new
variables (NV1-26) which have been assigned the numbers V49-74 in this
catalogue.
For V1-48, the magnitudes and amplitudes are from Millis & Liller.
The RA, dec, periods and classifications are from Toddy et al., unless
indicated otherwise in the remarks column.
The 5 stars indicated "M&L" were outside Toddy's field of view. For
these 5 stars, the RA and dec are from Samus et al. (2009) and the
remaining data are from Millis & Liller (1980).
All of the data listed for V49-74 are from Toddy et al.
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Notes on individual stars
V15, V39:
These stars are PX Tel and PS Tel in the Moscow GCVS.
V24, V27, V40, V43, V44:
These stars were all outside the field investigated by Toddy et al.
(2012). Their distances from the cluster centre are 9.3, 10.6, 6.4,
9.2 and 8.8 arcminutes respectively. The tidal radius of NGC 6584
is 7.7 arcminutes according to the 2010 update to the Harris (1996)
catalogue. Thus four of these stars are well outside that limit.
V24 and V27 are considered to be field stars. V43 and V44 are
probably field stars as well, but since their magnitudes and
amplitudes are comparable to those of the RR Lyrae cluster members,
they are listed as possible field stars.
V24 = PU Tel and V27=PT Tel in the GCVS
V33, V34:
The RA and dec that Toddy listed for these two stars do not
correspond to the positions published by Millis & Liller, even
though the periods they derived were the same, within the expected
uncertainties. The RA and dec listed above are from Samus et al.
(2009).
V45: Millis & Liller mislabelled this star on their ID chart. According
to their x,y coordinates, V45 is the star that is directly above the
number "45", not the one to the right. As a result of this error,
Samus et al. derived the RA and dec for the wrong star, but Toddy's
values are correct and are listed in the above table.
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Discovery of the variable stars in NGC 6584:
V1
Fourcade et al. (1966) with x,y coordinates and an ID chart
V2-48
Millis & Liller (1980) with x,y coordinates and ID charts for V1-48
They made a small revision to the x,y position of V1.
V49-74 = NV1-26
Toddy et al. (2012) with RA and dec
They also published RA and dec for most of the variables V1-48.
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References
Fourcade, C. R., Laborde, J. R., Albarracin, J. 1966, Atlas y Catalogue
de Estrellas Variables en Cumulos Globulares al sur de -29 degrees, Cordoba
Harris, W. E. 1996, AJ, 112, 1487
Millis, A. J. & Liller, M. H. 1980, AJ, 85, 235
Prudil Z., Arellano Ferro, A. 2024, MNRAS, 534, 3654
Samus, N. N., Kazarovets, E. V., Pastukhova, E. N., Tsvetkova, T. M.,
Durlevich, O. V. 2009, PASP, 121, 1378
Toddy, J. M., Johnson, E. W., Darragh, A N., Murphy, B. W. 2012, JSARA,
6, 63
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