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The optical counterpart of IGR J00291+5934 in quiescence
P. D'Avanzo, S. Campana, S. Covino +3
The recent (December 2004) discovery of the sixth accretion-powered millisecond X-ray pulsar IGR J00291+5934 provides a very good chance to deepen our knowledge of such systems. Al…
BVI photometry of the very old open cluster Berkeley 17
Angela Bragaglia, Monica Tosi, Gloria Andreuzzi +1
We have obtained BVI CCD imaging of Berkeley 17, an anticentre open cluster that competes with NGC 6791 as the oldest known open cluster. Using the synthetic colour magnitude diagr…
The RR Lyrae distance scale from near-infrared photometry: current results
M. Dall'ora, G. Bono, J. Storm +7
We present new observational results on the RR Lyrae K-band Period-Luminosity relation (PLK). Data on the Galactic globular clusters NGC 3201 and NGC 4590 (M68), and on the Large M…
VLT FORS-1 observations of NGC 6397: Evidence for mass segregation
G. Andreuzzi, V. Testa, G. Marconi +3
We present (V,V-I) VLT-FORS1 observations of the Galactic Globular Cluster NGC 6397. We derive accurate color--magnitude diagrams and luminosity functions (LFs) of the cluster Main…
The distance to the LMC cluster Reticulum from the K-band Period-Luminosity-Metallicity relation of RR Lyrae stars
M. Dall'ora, J. Storm, G. Bono +12
We present new and accurate Near-Infrared J and Ks-band data of the Large Magellanic Cloud cluster Reticulum. Data were collected with SOFI available at NTT and covering an area of…
The Distance to NGC 5904 (M 5) via the Subdwarfs Main Sequence Fitting Method
Vincenzo Testa, Alessandro Chieffi, Marco Limongi +2
We present a determination of the distance modulus of the globular cluster NGC 5904 (M 5), obtained by means of the subdwarf main-sequence fitting on the (V,V-I) color-magnitude di…