NGC 6496/ C1755m442 (Updated January 2015) RA: 17:59:03.68 DEC: -44:15:57.4 (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 17:58:55.88 -44:14:19.4 R0 69.0 14.98 1.29 V SR 2 17:59:12.94 -44:17:20.5 R0 55.0 14.87 0.74 V Lb 3 17:59:17.99 -44:16:24.4 R0 37.0 14.20 0.64 V Lb Note 4 17:58:56.91 -44:15:51.7 R0 73.0 14.98 0.62 V Lb 5 17:59:02.55 -44:14:08.3 R0 85.0 14.46 0.66 V Lb 6 17:58:56.47 -44:19:36.4 R0 48.0 13.84 0.44 V Lb f? 7 17:59:28.01 -44:17:26.7 R0 -- 12.85 0.06 V Lb? f 8 17:59:05.82 -44:21:39.1 R0 -- 15.16 0.14 V Lb? f 9 17:58:34.68 -44:14:47.1 R0 0.7666 15.63 0.27 V EW? 10 17:59:23.14 -44:19:27.2 R0 0.2897 15.96 0.96 V EW 11 17:58:30.75 -44:16:51.4 R0 0.3371 14.76 0.56 V EW? 12 17:59:05.67 -44:12:58.0 R0 0.884 16.04 0.42 V EW? 13 17:58:40.44 -44:19:23.9 R0 0.4385 15.64 1.01 V EB ======================================================================= Supplementary Notes The data in the above table are from the discovery paper by Abbas et al. (2015). CM diagrams published by Fraga et al. (2013) and Abbas et al. (2015) show a prominent red clump on the horizontal branch, characteristic of a metal rich cluster. No RR Lyrae variables have been discovered. ======================================================================= Notes on individual stars V3: Abbas et al. (2015) noted that this star shows a short-period, low-amplitude variation on top of a much longer periodicity (340 days). ======================================================================= Discovery of the variable stars in NGC 6496 V1-13: Abbas et al. (2015) with RA, dec and ID charts Abbas et al. also investigated star ASAS 175901-4411.5 (Pojmanski & Maciejewski 2004) which was in their field of view, at a projected angular distance of 4.4 arcmin from the cluster centre. They concluded that it was too bright to be a cluster member. ======================================================================= References Abbas, M. A., Layden, A. C., Guldenhschuh, K. A., Reichart, D. E., Ivarsen, K. M., Haislip, J. B., Nysewander, M. C. and 2 coauthors, 2015, AJ, 149, 40 Fraga, L., Kunder, A., Tokovinin, A. 2013, AJ, 145, 165 Pojmanski, G. & Maciejewski, G. 2004, Acta A., 54, 153 =======================================================================