We compiled a catalog of 421 references 12-15mag stars for determining accurate positions of objects in the region of M 31. We also compiled a star chart, which is provided as an Internet Web service, for identifying the catalogued reference stars on the plates of observers. AQccurate positions and a finding chart are given for 33 reference 15-17mag stars in a 10'x12' field near the center of M 31.
Cone search capability for table J/PAZh/24/93/table2 (Equatorial coordinates (B1950) of stars at the center of M31)
Cone search capability for table J/PAZh/24/93/catalog (Reference catalogue)