NGC 5927 / C1524-505 (Updated January 2013) RA: 15:28:00.69 DEC: -50:40:22.9 (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 15:28:15.17 -50:38:09.3 R0 ---- 15.3 0.6 V Lb f? 2 15:27:56.16 -50:40:34.4 R0 ---- 15.2 0.6 V Lb 3 15:28:00.13 -50:40:24.6 R0 312.0 -- -- M 4 15:28:06.97 -50:41:22.2 R0 67.0 15.2 1.0 V Lb 5 15:27:56.56 -50:39:00.5 R0 ---- 14.95 0.5 V Lb 6 15:27:57.13 -50:38:48.2 R0 ---- 15.1 0.6 V Lb 7 15:28:02.81 -50:40:47.7 R0 70.0 15.3 0.6 V Lb 8 15:28:05.38 -50:38:50.0 R0 70.0 15.4 0.8 V Lb 9 15:28:01.72 -50:42:27.2 R0 85.0 15.75 0.9 V Lb 10 15:28:04.69 -50:39:55.4 R0 ---- 15.1 0.4 V Lb 11 15:27:44.92 -50:42:10.7 R0 ---- 15.1 0.4 V Lb f? ===================================================================== Supplementary Notes The RA and dec are from Samus et al. (2009). All of the remaining data are from Lloyd Evans & Menzies (1977). Lloyd Evans & Menzies also listed magnitudes and colours for two additional red variables that were probable non-members. ======================================================================== Discovery of the variable stars in NGC 5927: V1&2 = Fourcade #4 and #14 Fourcade et al. (1966) announced 15 variables in the field of NGC 5927 and published x,y coordinates and an ID chart. Sawyer Hogg (1973) designated Fourcade's V4 and V14 as V1 and V2 in her 3rd catalogue. V3 Osborn (1968) with x,y coordinates and an ID chart The number V3 was assigned by Sawyer Hogg (1973) in her 3rd catalogue. V4-11 = V3, V6, V7, V8, V9, V10, L43, L17 of Lloyd Evans & Menzies (1973), but no identification was provided by these authors. After consultation with Lloyd Evans and Menzies, Sawyer Hogg (1973) assigned the numbers V4-11 in her 3rd catalogue and Menzies (1974) labelled them, along with V1 and V2, on an ID chart (see Plate II of his paper). --------------------------------------------------------------------------- Liller (1983) conducted a search for RR Lyrae variables in NGC 5927, but did not discover any. She derived mean B magnitudes for the known variables from her observations. The cluster CMD has a stubby red HB that does not extend into the instability strip. ======================================================================== 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 Liller, M. 1983, AJ, 88, 404 Lloyd Evans T. & Menzies, J. 1973, IAU Colloq. No. 21, Variable Stars in Globular Clusters and in Related Systems, 151` Lloyd Evans T. & Menzies, J. 1977, MNRAS, 178, 163 Menzies, J. 1974, MNRAS, 169, 79 Osborn, W. 1968, Obs 88, 26 Sawyer Hogg, H. 1973, Publ. DDO, 3, No.6 ======================================================================