CCD photometry of globular clusters

Details CCD photometry of globular clusters CCD photometry of globular clusters

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988msngr..53...32a&link_type=abstract

ESO Messenger (ISSN 0722-6691), Sept. 1988, p. 32-35.

Astronomy and Astrophysics

Astronomy

1

Astronomical Photometry, Color-Magnitude Diagram, Galactic Evolution, Globular Clusters, Stellar Evolution, Charge Coupled Devices, Cosmology, Gravitational Effects, Star Distribution, Ubv Spectra

Scientific paper

A CCD with 512 x 320 pixels was used to obtain BVRI frames lasting from a few sec to several min for several globular clusters in order to cover the full range of magnitudes without image saturation. The reductions of these images were accomplished with the MIDAS/INVENTORY software, which uses point-spread function techniques. Precise color equations are established for the CCD telescope system, on the basis of 140 BVRI frames and a total of 40 standard stars with a wide color range.

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