E3 / C0921-770 (Updated June 2011) RA: 09:20:57.07 DEC: -77:16:54.8 (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 -- -- 0.0853 17.48 0.4 V SXPHE 2 -- -- 0.4490 18.17 0.42 V EW max;f ==================================================================== Supplementary Notes The data for V1-2 are from the discovery paper by Mochejska et al. (2000) Sarajedini et al. (2007) published a CM diagram which showed no HB population. They concluded that this indicates there has been significant mass segregation and/or mass loss. ======================================================= Discovery of the variable stars in E3: V1-2: Mochejska et al. (2000) who also published an ID chart --------------------------------------------------------- Lan et al. (2010) identified three X-ray sources within the half mass radius; they expected all of them to be background sources. However, they also indicated the possibility that one source, E3-CX02, could be a cataclysmic variable. ==================================================================== References Lan, S.-H., Kong, A. K. H., Verbunt, F., Lewin, W. H. G., Bassa, C., Anderson, S. F., Pooley, D. 2010, ApJ, 712, 380 Mochejska, B. J., Kaluzny, J., Thompson, I. 2000, Acta Astron., 50, 105 Sarajedini, A., Bedin, L. R., Chaboyer, B., Dotter, A., Siegel, M., Anderson, J., Aparicio, A., King, I., Majewski, S., Marin-Franch, A. et al. 2007, AJ, 133, 1658 ========================================================================