SCYON Abstract

Received on November 12 2003

UBVI photometry of the intermediate age open cluster NGC 6939

AuthorsGloria Andreuzzi (1,2), Angela Bragaglia (3), Monica Tosi (3), Gianni Marconi (1,4)
Affiliation
1 INAF Oss. Astr. Roma
2 Telescopio Nazionale Galileo
3 INAF Oss. Astr. Bologna
4 ESO
Accepted byMonthly Notices of the Royal Astronomical Society
Contactandreuzzi@tng.iac.es
URLhttp://babbage.sissa.it/abs/astro-ph/0311249
Links NGC 6939

Abstract

We present CCD UBVI photometry of the nearby, intermediate age open cluster NGC 6939. Using the synthetic Colour - Magnitude Diagrams technique we estimate the following parameters: age between 1.3 and 1.0 Gyr (depending on whether or not overshooting is considered), reddening 0.34 <= E(B-V) <= 0.38 and distance modulus 11.3 <= (m-M)_0 <= 11.4.