g'r'i' and redshift of Abell 2254 galaxies (Girardi+, 2011)
Multi-object spectroscopic observations of A2254 were carried out at the TNG telescope in May and October 2009 and in March 2010. Our photometric observations...
g-mode: a new generation of helioseismic instrument
The GOLF team pushes a new concept of instrument devoted to the search of gravity modes and low order low frequency p modes in order to improve our knowledge of...
Gaia spectroscopy: processing, performances and scientific returns
During the five years of the mission, the Gaia spectrograph, the Radial Velocity Spectrometer (RVS) will repeatedly survey the celestial sphere down to...
Galactic archaeology for amateur astronomers: RR Lyrae stars as tracers of the Milky Way formation
Cosmological models predict that large galaxies like the Milky Way formed from the accretion of smaller stellar systems. The most spectacular of these merger...
OTELO (OSIRIS Tunable Emission Line Object survey) is a project aimed at studying the low end luminosity function of emission line galaxies. A broad band survey...
Galactic Black Hole Transient H1743-322 in transition to the hard state
Galactic black hole transient H1743-322 has been in outburst since UT 2009 May 26, (ATELs #2058, #2062). The RXTE PCA count rate has been dropping since 2009...