NGC 6316 / C1713-280 (Updated June 2013) RA: 17:16:37.30 DEC: -28:08:24.4 (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) 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 17:16:42.57 -28:09:41.6 R0 ---- 15.69 -- V L? 2 17:16:39.58 -28:08:22.5 R0 ---- 15.68 -- V L? 3 17:16:36.66 -28:09:06.2 R0 ---- 15.73 -- V L? 4 17:16:35.63 -28:07:39.8 R0 ---- 16.36 -- V L? 5 17:16:37.71 -28:08:03.9 R0 ---- 16.48 -- V L? 6 17:16:33.08 -28:07:59.7 R0 ---- 15.87 -- V ? 7 17:16:53.43 -28:13:27.4 R0 ---- 16.49 -- V L? f? 8 17:16:48.82 -28:04:56.1 R0 ---- 17.13 -- V L? f? 9 17:16:38.53 -28:08:35.7 R0 ---- 15.58 -- V L? 10 17:16:34.14 -28:06:30.1 R0 ---- 17.15 -- V L? f? 11 17:16:10.85 -28:08:29.9 R0 ---- 17.17 -- V L? f? 12 17:16:50.34 -28:03:19.4 R0 ---- 17.85 -- V E? f? 13 17:16:39.58 -28:10:44.0 R0 ---- 19.05 -- V ? f? 14 17:16:28.07 -28:03:18.2 R0 0.3969 15.05 0.24 V EW? f;Note 15 17:16:55.69 -28:14:52.3 R0 0.5602 17.13 0.71 V RR0 f;Note 16 17:17:05.07 -28:09:02.9 R0 0.2725 17.19 0.47 V RR1 17 17:16:25.64 -28:09:04.3 R0 0.4883 17.37 0.84 V RR0 altP=0.9769 18 17:16:25.46 -28:14:02.6 R0 0.5822 17.48 1.06 V RR0 f;Note 19 17:16:43.89 -28:08:23.6 R0 0.4225 17.82 0.29 V EW? f;Note ====================================================================== Supplementary Notes The periods, magnitudes, amplitudes, classifications, and membership status are from the discovery paper by Layden et al. (2003). The RA and dec for the four variables V14, V15, V18, V19 are from the GCVS where they are listed as V2719 Oph, V2721 Oph, V2718 Oph and V2720 Oph respectively. For the remaining variables, the RA and dec are from matches with 2MASS sources. Initially, provisional values were calculated from relationships derived by Layden et al. (2003): Delta RA = -0.396*(X_pix - 1059); Delta dec = -0.396*(Y_pix - 993). For these calculations, the cluster centre was assumed to be 17:16:37.3, -28:08:24.4, the value published in the 2010 version of the Harris (1996) catalogue. The provisional coordinates and the 2MASS coordinates agreed to within 1 arcsec for all the variables except V11 for which the difference was 3 arcsec. ===================================================================== Notes on individual stars V14, V15, V18, V19 are listed in the GCVS as V2719 Oph, V2721 Oph, V2718 Oph and V2720 Oph respectively. ===================================================================== Discovery of the variable stars in NGC 6316 V1-19 Layden et al. (2003) with pixel numbers ===================================================================== References Harris, W. E. 1996, AJ, 112, 1487 Layden, A. C., Bowes, B. T., Welch, D. L., Webb, T. M. A. 2003, AJ, 126, 255 ======================================================================