CCD Photometry of the Open Cluster NGC 1857

Details CCD Photometry of the Open Cluster NGC 1857 CCD Photometry of the Open Cluster NGC 1857

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...18510304c&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #103.04; Bulletin of the American Astronomical Society, Vol. 26, p.1486

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a new CCD photometry in the BVRI system of the open cluster NGC 1857, a largely unstudied cluster located in the galactic anticenter. Presented are results obtained using both IRAF/APPHOT and DAOPHOT to reduce multiple datasets obtained with the UAO 61-inch telescope, Mt. Bigelow, Arizona. The resulting color-magnitude diagrams show a well-defined sequence from the turnoff, near V = 13.3 and B - V = 0.55 to V~17, and present several giant candidates. Fitting of theoretical isochrones allows numerical estimates of the log(Age) = (8.25 +/- 0.3) and E(B-V) = (0.68 +/- 0.05).

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