Comet McNaught C/2006 P1 was the brightest comet of the last forty years when reaching its perihelion at an heliocentric distance of 0.17Â AU. Two days before this perihelion, at an heliocentric distance of 0.2Â AU, Themis, a French-Italian solar telescope in the Canary Islands, Spain, observed the Comet sodium emission of McNaught. The measured

The data sets presented here were collected between 2003 August and 2005 November. They consist of 15 pointings in the Sculptor dSph and 11 in the Fornax dSph spread over the galaxies. Some fields were observed with 1h exposure time, whilst other fields have repeated exposures of shorter integration time and two different plate set-ups, with the

The data sets presented here were collected between 2003 August and 2005 November. They consist of 15 pointings in the Sculptor dSph and 11 in the Fornax dSph spread over the galaxies. Some fields were observed with 1h exposure time, whilst other fields have repeated exposures of shorter integration time and two different plate set-ups, with the

We analyze the bremsstrahlung emission obtained by the α -γ coincidence measurements to investigate on the α -decay dynamics of the 214 Po nucleus. We performed the experiment using a radioactive 226 Ra source leading, by α -decays, to the 214 Po nucleus, and the apparatus with the Si detector for α -particles, the NaI(Tl) detector able to collect

We have used multiband high-resolution HST WFPC2 and ACS observations combined with wide-field ground-based observations to study the blue straggler star (BSS) population in the Galactic globular cluster NGC 6388. As in several other clusters we have studied, the BSS distribution is found to be bimodal: highly peaked in the cluster center, rapidly

In this work we present the results of an optical photometric study performed to seven nearby AGN that were selected with the SDSS-DR5 database. Surface photometric techniques have been applied to the data in order to obtain B/D ratio and therefore the M_R(Bulge) magnitudes. Bulge luminosities were then used to estimate the black-hole masse (M_{BH}