Multicolour photoelectric photometry of the open cluster NGC 752

AuvbyCaHβCCD ANALYSIS OF THE OPEN CLUSTER STANDARD NGC 752

“…For V, Crawford & Barnes (1970) did not provide magnitudes. However, we attempted to merge the data of Johnson (1953), Eggen (1963), Jennens & Helfer (1975), Rufener (1981), Rufener (1988), Dzérvítis & Paupers (1993), Joner & Taylor (1995), Bartašūiṫe et al (2007). The V magnitudes of Dzérvítis & Paupers (1993) were eliminated after a number of stars exhibited unusually large residuals compared to multiple observations from other sources which showed no evidence for variability among these stars.…”

“…While it is likely that the uncertainties in the fundamental cluster properties of Rup 147 will diminish as its membership is expanded and its individual stars are studied on a variety of photometric systems, the areal spread of over 5 square degrees and the low density contrast have led to slow progress in the investigation of this intriguing object. By comparison, NGC 752 has a long history of photoelectric observations on virtually every major photometric system from broad-band UBVRI (Johnson 1953;Eggen 1963;Taylor et al 2008) and Washington photometry (Canterna et al 1986) to intermediate-band photometry on the extended Strömgren (Crawford & Barnes 1970;Twarog 1983;Joner & Taylor 1995;Anthony-Twarog & Twarog 2006), Vilnius/ Stromvil (Dzérvítis & Paupers 1993;Bartašūiṫe et al 2007;Zdanavičius et al 2010;Bartašūiṫe et al 2011), DDO (Janes 1979), and Geneva (Rufener 1981(Rufener , 1988 systems. High and moderate-dispersion spectroscopy (Pilachowski et al 1988;Friel & Janes 1993;Friel et al 2002;Sestito et al 2004;Carrera & Pancino 2011;Reddy et al 2012;Nault & Pilachowski 2013;Maderak et al 2013;Böcek Topcu et al 2015) is available for limited samples of both dwarfs and giants.…”