NGC 6584 / C1814-522 (Updated May 2014) RA: 18:18:37.60 DEC: -52:12:56.8 (J2000) ============================================================ Bytes Format Explanation 1-8 A8 Star ID 10-32 A11,1x,A11 Position 34-35 A2 Units for position R0 denotes RA, DEC in the J2000 coordinates R5 denotes RA, DEC in the 1950 coordinates XA denotes X, Y in arcseconds XP denotes X, Y in pixels 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 ========================================================================= ID Position Period ampl C Type Notes/ RA/X Dec/Y Units Remarks ========================================================================= 1 18:18:28.82 -52:13:27.0 R0 0.4952 16.45 1.30 B RR0 2 18:18:42.20 -52:12:30.0 R0 0.5447 16.35 1.30 B RR0 3 18:18:42.14 -52:13:16.2 R0 0.4716 16.15 1.50 B RR0 4 18:18:40.30 -52:13:25.5 R0 0.5438 16.50 1.40 B RR0 5 18:18:40.49 -52:13:29.1 R0 0.2973 16.60 1.00 B RR1 6 18:18:34.45 -52:12:07.8 R0 0.6262 16.50 0.80 B RR0 7 18:19:01.34 -52:11:55.3 R0 0.5475 16.50 1.20 B RR0 8 18:18:55.62 -52:13:35.3 R0 0.3051 16.50 0.80 B RR1 9 18:18:43.55 -52:12:02.7 R0 0.4951 16.05 2.10 B RR0 10 18:18:37.07 -52:11:36.7 R0 0.6943 16.35 1.10 B RR0 11 18:18:35.42 -52:13:10.8 R0 0.5395 16.40 1.40 B RR0 12 18:18:35.84 -52:12:32.6 R0 0.5951 15.50 0.80 B RR0 blend? 13 18:18:35.85 -52:14:32.3 R0 0.3455 16.50 0.80 B RR1 14 18:18:41.20 -52:13:43.2 R0 0.5995 16.30 1.40 B RR0 15 18:18:23.56 -52:12:41.9 R0 0.6363 15.00 0.60 B RR0 blend? 16 18:18:42.04 -52:12:58.6 R0 0.5822 16.25 1.10 B RR0 17 18:18:41.87 -52:13:22.3 R0 0.5634 16.35 1.30 B RR0 18 18:18:32.99 -52:13:18.3 R0 0.5579 16.20 1.00 B RR0 19 18:18:40.66 -52:13:06.4 R0 0.5422 15.60 0.60 B RR0 20 18:18:28.15 -52:12:57.9 R0 0.5253 16.65 0.70 B RR0 21 18:18:34.48 -52:13:55.1 R0 0.5403 16.35 1.30 B RR0 22 18:18:38.02 -52:12:50.5 R0 0.5556 17.00 1.20 B RR0 23 18:18:30.76 -52:13:10.0 R0 0.5981 16.20 0.80 B RR0 24 18:19:24.72 -52:18:50.1 R0 0.3086 15.05 0.90 B RR1 f;M&L 25 18:18:56.91 -52:11:12.8 R0 0.4534 16.40 1.60 B RR0 26 18:18:33.62 -52:13:52.1 R0 0.5697 16.25 1.10 B RR0 27 18:19:02.24 -52:22:46.1 R0 ---- 18.10 0.80 B EB f;M&L 28 18:18:48.09 -52:12:19.8 R0 0.4982 16.40 1.40 B RR0 29 18:18:41.49 -52:11:40.5 R0 0.6072 16.35 1.30 B RR0 30 18:18:42.85 -52:09:31.9 R0 0.5138 16.40 1.60 B RR0 31 18:18:30.61 -52:13:38.5 R0 0.5683 16.25 1.30 B RR0 32 18:18:40.71 -52:14:05.4 R0 0.5952 16.40 1.40 B RR0 33 18:18:28.85 -52:13:37.3 R0 0.2860 16.35 0.90 B RR1 Note 34 18:18:30.03 -52:12:46.2 R0 0.7801 16.60 0.40 B RR0 Note 35 18:18:36.82 -52:12:48.4 R0 0.5555 16.45 0.70 B RR0 36 18:18:38.94 -52:14:00.2 R0 0.5245 16.45 1.90 B RR0 37 18:18:26.06 -52:14:28.1 R0 0.2979 16.50 1.00 B RR1 38 18:18:26.81 -52:11:55.1 R0 0.5516 16.40 1.40 B RR0 39 18:18:19.48 -52:10:47.2 R0 0.3314 15.50 0.60 B EC 40 18:18:18.62 -52:18:35.0 R0 0.5970 16.60 1.20 B RR0 M&L 41 18:18:40.70 -52:13:04.9 R0 0.6399 16.00 1.00 B RR0 42 18:18:39.88 -52:11:55.3 R0 0.5768 16.55 1.50 B RR0 43 18:18:03.70 -52:05:20.7 R0 0.5540 16.55 1.30 B RR0 f?;M&L 44 18:19:11.24 -52:05:52.1 R0 0.4920 16.40 1.60 B RR0 f?;M&L 45 18:18:28.75 -52:12:30.8 R0 0.5082 16.20 1.40 B RR0 46 18:18:25.08 -52:12:35.3 R0 0.5256 16.40 1.20 B RR0 47 18:18:38.32 -52:13:20.8 R0 0.2767 16.70 1.00 B RR1 48 18:18:38.55 -52:13:26.1 R0 0.3071 16.65 1.10 B RR1 49 18:18:06.83 -52:12:25.0 R0 0.2553 -- -- EC 50 18:18:19.26 -52:12:38.3 R0 0.2930 -- -- RR1 51 18:18:27.84 -52:12:59.4 R0 0.7520 -- -- RR0 52 18:18:27.99 -52:12:55.7 R0 0.5238 -- -- RR0 53 18:18:28.19 -52:14:07.0 R0 0.3472 -- -- RR1 54 18:18:32.16 -52:14:43.2 R0 0.6441 -- -- RR0 55 18:18:32.79 -52:12:24.7 R0 0.5658 -- -- RR0 56 18:18:33.14 -52:10:15.5 R0 0.3081 -- -- RR1 57 18:18:34.47 -52:12:49.1 R0 0.2648 -- -- RR2? 58 18:18:35.57 -52:13:31.4 R0 0.6393 -- -- RR0 59 18:18:35.66 -52:12:20.6 R0 ---- -- -- Lb 60 18:18:35.67 -52:13:07.1 R0 0.5839 -- -- RR0 61 18:18:37.69 -52:13:59.8 R0 ---- -- -- Lb 62 18:18:37.79 -52:13:06.2 R0 ---- -- -- Lb 63 18:18:38.16 -52:12:54.8 R0 0.5374 -- -- RR0 64 18:18:38.42 -52:12:56.0 R0 0.6363 -- -- RR0 65 18:18:38.58 -52:12:21.4 R0 0.4964 -- -- RR0 66 18:18:38.77 -52:13:14.1 R0 0.3418 -- -- RR1 67 18:18:39.48 -52:14:32.8 R0 0.5857 -- -- RR0 68 18:18:39.93 -52:11:21.3 R0 0.3172 -- -- RR1 69 18:18:40.01 -52:13:09.1 R0 0.3091 -- -- RR1 70 18:18:40.81 -52:10:32.5 R0 0.3363 -- -- RR1 71 18:18:41.98 -52:12:53.7 R0 0.5574 -- -- RR0 72 18:18:42.72 -52:12:28.9 R0 0.2737 -- -- RR1 73 18:18:44.98 -52:08:10.7 R0 0.2469 -- -- EC 74 18:18:51.42 -52:13:30.8 R0 0.4636 -- -- EC ==================================================================== 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. All of the data listed for V49-74 are from Toddy et al. For V1-48, the RA, dec, periods and classifications are also 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 reaming data are from Millis & Liller (1980). The magnitudes and amplitudes for V1-48 are from Millis & Liller. V15, V24, V27, V39 are listed in the Moscow GCVS as PXTel, PU Tel, PT Tel, PS Tel respectively. =================================================================== Notes on individual stars 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. 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. ==================================================================== 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. ========================================================================= 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 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