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Paper: Near-Infrared photometry of the LMC cluster Reticulum
Volume: 310, Variable Stars in the Local Group (IAU Colloquium 193)
Page: 189
Authors: Dall'Ora, M.; Bono, G.; Storm, J.; Ripepi, V.; Testa, V.; Andreuzzi, G.; Buonanno, R.; Caputo, F.; Castellani, V.; Corsi, C.E.; Degl'Innocenti, S.; Marconi, G.; Marconi, M.; Monelli, M.
Abstract: We present U, B, V, I (SUSI@NTT) and J, Ks (SOFI@NTT) photometry of the Large Magellanic Cloud (LMC) cluster Reticulum. The observing strategy and data reduction (DAOPHOTII/ALLFRAME) allowed us to reach an accuracy of the order of 0.01 − 0.03 mag in all the bands at limiting magnitudes typical of RR Lyrae stars. Reticulum hosts a sizable sample of RR Lyrae stars (32), and we supply an accurate distance estimate using the RR Lyrae K-band Period-Luminosity-Metallicity (PLZK) relation. This method presents several advantages when compared with the MV vs [Fe/H] relation, since it is only marginally affected by off-ZAHB evolutionary effects and reddening corrections.
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