Multiwavelength Time Series Data of the LMC Cluster Reticulum

Monelli, M.; Andreuzzi, G.; Bono, G.; Buonanno, R.; Caputo, F.; Castellani, M.; Castellani, V.; Corsi, C. E.; dall'Ora, M.; Marconi, G.; Pulone, L.; Ripepi, V.; Storm, J.; Testa, V.
Referencia bibliográfica

New Horizons in Globular Cluster Astronomy, ASP Conference Proceedings, Vol. 296, held 24-28 June 2002 at Dipartimento di Astronomia, Universita' di Padova, Padova, Italy. Edited by Giampaolo Piotto, Georges Meylan, S. George Djorgovski and Marco Riello. ISBN: 1-58381-143-5, 2003, p.388

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2003
Número de autores
14
Número de autores del IAC
0
Número de citas
2
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1
Descripción
We present accurate multiwavelength UBVI time series data of the LMC cluster Reticulum. Data cover a time interval of ~ 6 yr and have been collected with SUSI1/2 and SOFI at NTT/ESO. For each band we collected approximately 30 short/long exposures and the total exposure times range from roughly 3500 (U, B), 6000s (V) to 8300s (I). The observing strategy and data reduction (DAOPHOTII/ALLFRAME) allowed us to reach a photometry accuracy of 0.02 magnitude from the tip of the Red Giant Branch well below the Turn-Off region. Even though this cluster presents a very low central density, we found a sizable sample of Blue Stragglers (BSs). We also selected stars with a variability index larger than 2, and interestingly enough we detected together with the RR Lyrae stars a large sample of variable stars around and below the TO region. Preliminary analysis on the luminosity variation indicate that these objects might be binary stars.