40 citations · 95 across the 4 of their papers we have counts for
1 paper · 1 filter
B. J. Anthony-Twarog, C. P. Deliyannis, B. A. Twarog
Precision uvbyCa Hbeta photometry of the metal-deficient, old open cluster, NGC 2506, is presented. The survey covers an area 20 by 20 arcminutes, and extends to V~18 for b-y and H…