Four - Color And Hβ Photometry of Stars in the Galactic Cluster NGC 129

Four - Color and Hβ Photometry of the Galactic Cluster M 25

Four-color and w photometry has been obtained for 39 stars in the field of the galactic cluster M25. The membership of the individual stars is discussed. From 27 stars which are considered likely members we obtain a mean distance modulus of 8.76 and a mean color excess of E ( b -y) = 0.341.

Four - Color and Hβ Photometry of the Galactic Cluster NGC 6633

Four - Color and Hp Photometry O F Stars in the Galactic Cluster Ngc 6087

Four-color and HP photometry has been obtained for 16 stars in the open cluster NGC 6087. Based on this photometry the membership of these stars in the cluster is discussed. Using stars which appear to be members a color excess of E (b y) = 0Y23 and a distance modulus of (V, M,) = 9%0 are derived. This distance modulus is about 0% less than previous values and indicates a lower luminosity for t...

Ccd Photometry of Galactic Globular Clusters. Iv. the Ngc 1851 Rr Lyraes

The variable star population of the galactic globular cluster NGC 1851(C0512-400) has been studied by CCD photometry, from observations made in the B, V and I bands during 1993-1994. Light curves are presented for 29 variables, seven of which are new discoveries. The behavior of the RR Lyraes in the period-temperature diagram appears normal when compared to clusters which bracket the NGC 1851 m...

The Globular Cluster Ngc 5286. I. a New Ccd Bv Color-magnitude Diagram *

We present BV photometry of the Galactic globular cluster NGC 5286, based on 128 V frames and 133 B frames, and covering the entire face of the cluster. Our photometry reaches almost two magnitudes below the turn-off level, and is accordingly suitable for an age analysis. Field stars were removed statistically from the cluster’s color-magnitude diagram (CMD), and a differential reddening correc...