1 Supper et al. (2001, Cat. );
2 Primini, Forman, & Jones (1993ApJ...410..615P);
3 Trinchieri & Fabbiano (1991ApJ...382...82T);
4 Walterbos & Braun (1992 Cat. );
5 Ford & Jacoby (1978ApJ...219..437F);
6 Battistini et al. (1987A&AS...67..447B);
7 Brown et al. (2000, Cat. );
8 Brown et al. (1998, Cat. );
9 Braun (1990ApJS...72..755B),
11 Dodorico, Dopita, & Benvenuti (1980A&AS...40...67D);
12 Williams, Schmitt, & Winkler (1995BAAS...27..883W);
13 Mochejska et al. (2001, Cat. );
14 Magnier (1993, Ph.D. thesis, MIT);
15 Kong et al. (2002, Cat. );
16 Voges et al. (1999, Cat. );
17 Meyssonnier, Lequeux, & Azzopardi (1993, Cat. );
18 de Vaucouleurs & Corwin (1985ApJ...295..287D);
19 Osborne et al. (2001A&A...378..800O);
20 Wirth, Smarr, & Bruno (1985ApJ...290..140W);
21 Kaaret (2002, Cat. );
22 Garcia et al. (2000IAUC.7498S...1G);
23 Perlman et al. (1996ApJS..104..251P);
SSS These are supersoft sources in the catalog of Di Stefano et al. (2004,
SSS Cat. );
QSS These are quasisoft sources in the catalog of Di Stefano et al. (2004,
QSS Cat. );
new This work. New X-ray sources (labeled with an (X)) were seen for the first
new time in this data set. New optical counterparts (labeled with a (*)) were
new found by searching the Local Group Survey data on the M31 disk Massey et al.
new (2001, BAAS, 199, 130.05), or they are new X-ray sources that have no
new optical counterparts.