Ruprecht 106 / C1235-509 (Updated July 2016) RA: 12:38:40.2 DEC: -51:09:01 (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 12:38:24.32 -51:04:59.2 R0 0.6104 17.77 0.59 V RR0 2 12:38:57.34 -51:05:24.0 R0 0.6268 19.08 0.51 V RR0 f;Note 3 12:38:46.33 -51:07:51.2 R0 0.0395 20.05 0.30 V SXPHE 4 12:38:30.57 -51:08:10.7 R0 0.0490 19.71 0.14 V SXPHE 5 12:38:46.31 -51:08:33.8 R0 0.6006 17.78 0.58 V RR0 6 12:38:30.86 -51:08:35.8 R0 0.6408 17.82 0.37 V RR0 7 12:38:28.71 -51:09:00.1 R0 0.2755 19.55 0.28 V EW f 8 12:38:44.28 -51:09:21.0 R0 0.6208 17.75 0.49 V RR0 9 12:38:40.26 -51:09:25.6 R0 0.5740 17.75 0.84 V RR0 10 12:38:39.18 -51:09:32.0 R0 0.6019 17.79 0.67 V RR0 11 12:38:48.51 -51:09:31.7 R0 0.0478 20.25 0.18 V SXPHE 12 12:38:40.63 -51:09:39.2 R0 0.6221 17.84 0.51 V RR0 13 12:38:52.87 -51:09:48.7 R0 0.6523 17.78 0.37 V RR0 14 12:38:36.28 -51:10:10.3 R0 0.6061 17.88 0.77 V RR0 15 12:38:27.74 -51:11:26.4 R0 0.6033 17.84 0.64 V RR0 16 12:38:36.23 -51:11:27.2 R0 0.6270 17.80 0.47 V RR0 17 12:38:15.88 -51:11:47.4 R0 0.4135 16.78 0.48 V EW f 18 12:38:44.88 -51:11:46.8 R0 0.6375 17.80 0.39 V RR0 ======================================================================= Supplementary Notes A CM diagram of Ruprecht 106 by Dotter et al. (2011) shows a red HB and a well populated blue straggler sequence. There is some uncertainty about the metal abundance of this cluster with values ranging from [Fe/H] = -1.9 to greater than -1.6. Values based on photometric indicators are more metal poor than those based on spectroscopy. Dotter et al. (2011) suggested that this discrepancy might be due to its unusually low [alpha/Fe] ratio compared with other metal poor clusters. In the above table, the RA and dec are from Samus et al. (2009). The periods, magnitudes, amplitudes and classifications are from the discovery paper by Kaluzny et al. (1995). The field status of V7 and V17 are from Rucinski (2000). ===================================================================== Notes on individual stars V2: Samus et al. (2009) listed this variable as V0887 Cen. =================================================================== Discovery of the variable stars in Ruprecht 106: V1-18 Kaluzny et al. (1995) with RA, dec and X,Y pixel coordinates ======================================================================= References Dotter, A., Sarajedini, A., Anderson, J. 2011, ApJ, 738, 74 Kaluzny, J., Krzeminski, W., Mazur, B., 1995, AJ, 110, 2206 Rucinski, S. M. 2000, AJ, 120, 319 Samus, N. N., Kazarovets, E. V., Pastukhova, E. N., Tsvetkova, T. M., Durlevich, O. V. 2009, PASP, 121, 1378 =======================================================================