Electronographic stellar photometry of globular clusters

Details Electronographic stellar photometry of globular clusters Electronographic stellar photometry of globular clusters

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...135..401b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 135, no. 2, June 1984, p. 401-409. Research supported by the Swiss National Sc

Astronomy and Astrophysics

Astrophysics

8

Astronomical Photometry, Electronography, Globular Clusters, Calibrating, Data Reduction, Estimating, Image Processing, Microdensitometers

Scientific paper

The purpose of the present paper is to describe the reduction system applied to electronographic plates which has been used to obtain a colour-magnitude diagram of two globular clusters, the Magellanic HODGE 11 and the galactic NGC 6752. These plates obtained with the 90 mm McMullan RGO camera at the Danish 1.50 m telescope at La Silla were digitalized on the Geneva microdensitometer system and analyzed by MOAN software package. The relationship between the camera BV and the standard UBVJohnson is established and the preliminary magnitude-colour diagram down to mv = 22 together with an error estimate are given for NGC 6752.

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