Bibcode
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.
Bibliographical reference
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
Advertised on:
0
2003
Citations
2
Refereed citations
1
Description
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.