[PCK2011] 58783 , the SIMBAD biblio

We present comprehensive cluster membership and g'r' photometry of the prototypical old, metal-rich Galactic star cluster NGC 6791. The proper-motion catalog contains 58,901 objects down to g'∼ 24, limited to a circular area of radius 30'. The highest precision of the proper motions is 0.08 mas/yr. Our proper motions confirm cluster membership of all main and also some rare constituents of NGC 6791. The total number of probable cluster members down to g' = 22 (M_V∼ +8) is ∼4800, corresponding to M_tot~ 5000 M _☉. New findings include an extended horizontal branch in this cluster. The angular radius of NGC 6791 is at least 15' (the effective radius is R_h ≃ 4'.4 while the tidal radius is r_t≃ 23'). The luminosity function of the cluster peaks at M_{g^′}∼+4.5 and then steadily declines toward fainter magnitudes. Our data provide evidence that differential reddening may not be ignored in NGC 6791.