UBVRI photometry in the open cluster NGC 3532

Astronomy and Astrophysics – Astronomy

Scientific paper

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Electrophotometers, Open Clusters, Stellar Spectrophotometry, Ubv Spectra, Color-Magnitude Diagram, Stellar Color, Stellar Magnitude, Stellar Spectra

Scientific paper

NGC 3532 is a populous open cluster of intermediate age located a few degrees northwest of Eta Carina. The present investigation is concerned with observations which were conducted at the Las Campanas Observatory in Chile during the period March-July 1981. A 61-cm telescope and UBVRI photometer system described by Fernie (1974) were used in the observations. The results for the cluster stars are listed in a table. Standard stars from the E regions of Cousins were used each night to carefully determine extinctions and transformations. Attention is given to nightly rms errors for Cousins standards, the B-V color-magnitude diagram for NGC 3532, a V-R color-magnitude diagram for NGC 3532, and comparisons of V magnitudes and B-V colors for NGC 3532

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