NGC 6535 / C1801-003 (Updated March 2015) RA: 18:03:50.69 DEC: -00:17:48.9 (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 18:03:37.76 -00:16:47.9 R0 0.5884 16.85 1.3 B RR0 f 2 18:03:41.39 -00:19:12.0 R0 0.2735 17.15 0.5 B RR1 f ====================================================================== Supplementary Notes A CM diagram by Sarajedini (1994) shows a predominanty blue HB and significant population of blue straggler candidates. The 2010 update to the Harris (1996) catalogue lists [Fe/H] = -1.79. The RA and dec for V1 and V2 are from Samus et al. (2009) and the other elements are from Liller & Clement (1977). The field status for both variables is based on their location in the CM diagram of Liller (1980). ======================================================================== Discovery of the variable stars in NGC 6535: V1 = MO Ser Sawyer (1953) with x,y coordinates and an ID chart V2 = MP Ser Liller & Clement (1977) with x,y coordinates and an ID chart on which both V1 and V2 were labelled. ---------------------------------------------------------------------- Liller (1980) noted that star #41 (identified on an ID chart) might be variable. It lies near the RG tip in the CM diagram. ======================================================================= References Harris, W. E. 1996, AJ, 112, 1487 Liller, M. H., Clement, C. C. 1977, AJ, 82, 965 Liller, M. H. 1980, AJ, 85, 1480 Samus, N. N., Kazarovets, E. V., Pastukhova, E. N., Tsvetkova, T. M., Durlevich, O. V. 2009, PASP, 121, 1378 Sarajedini, A. 1994, PASP, 106, 404 Sawyer, H. B. 1953, JRASC, 47, 229 ======================================================================