NGC 6254 / C1654-040 / Messier 10 (Updated March 2014) RA: 16:57:09.05 DEC: -04:06:01.1 (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 16:57:10.12 -04:05:36.1 R0 50.0 13.8 1.5 P SR Note 2 16:57:11.74 -04:03:59.7 R0 18.7226 11.83 1.18 V CW Note 3 16:56:55.95 -04:04:16.3 R0 7.831 12.76 0.45 V CW Note 4 16:57:11.63 -04:10:37.9 R0 ---- -- -- RR? Note ====================================================================== Supplementary Notes The RA and dec for V1-4 are from Samus et al. (2009) ============================================================================= Notes on individual stars V1: Period, magnitude, amplitude and variablility type for V1 by Clement et al. (1985, AJ 90, 1238) V2: Period from Clement et al. (1985), magnitude, amplitude and variablility type from Arp (1955, AJ 60, 1). V3: Period from Clement et al. (1985), magnitude, amplitude and variability type from Arp (1955, AJ 60, 1) V4: variability type for V4 from Voroshilov (1971, Astron Tsirk 623, 7) ================================================================== Discovery of the variable stars in M10: V1-2 Sawyer (1938) with ID chart and x,y coordinates V3 Arp (1955a) with ID chart for V2&3. Sawyer (1955) listed the x,y coords in her 2nd catalogue V4 = Arp IV-37 (see Arp 1955b) by Voroshilov (1971) who found that this was an HB star in the instability strip. The number V4 was assigned by Sawyer Hogg (1973) in her 3rd catalogue. ----------------------------------------------------------------- Field variables not listed above M10:V1-3 by von Braun et al. (2002) vB#1 is a foreground WUMa, #2 is a background RR0 and #3 is a background SXPhe (or delta Scuti) ------------------------------------------------------------------- Pietrukowicz et al. (2008, MNRAS 388, 1111) searched for dwarf novae in M10 and found none. --------------------------------------------------------------------- Dalessandro et al. (2013) counted 120 blue straggler stars within the tidal radius of M10, but no variability search has been carried out. ===================================================================== References Arp, H. C. 1955a, AJ, 60, 1 Arp, H. C. 1955b, AJ, 60, 317 Dalessandro, E., Ferraro, F. R., Lanzoni, B., Schiavon, R. P., O'Connell, R. W., Beccari, G. 2013, ApJ, 770, 45 Pietrukowicz, P., Kaluzny, J., Schwarzenberg-Czerny, A., Thompson, I. B., Pych, W., Krzeminski, W., Mazur, B. 2008, MNRAS, 388, 1111 Samus, N. N., Kazarovets, E. V., Pastukhova, E. N., Tsvetkova, T. M., Durlevich, O. V. 2009, PASP, 121, 1378 Sawyer, H. B. 1938, Publ. DAO, 7, no.5 Sawyer, H. B. 1955, Publ. DDO, 2, No. 2 Sawyer Hogg, H. 1973, Publ. DDO, 3, No. 6 von Braun, K., Mateo, M., Chiboucas, K., Athey, A., Hurley-Keller, D. 2002, AJ, 124, 2067 Voroshilov, Yu. V. 1971, Astron. Tsirk., 623, 7 =============================================================