Aims:The aim of this paper is to analyze the thermal properties, oscillatory, and flow motions of a bright, long-lasting feature observed in solar granulation, which we call the plume. Methods: We used the spectral observations of quiet granulation at solar disc center, including the two Fe II 5234 and Fe I 6393 Å lines recorded simultaneously at

Since about 2002 the current-generation imaging air Cherenkov telescopes have discovered more than 50 new VHE γ-ray sources. More importantly, new extragalactic source classe have been discovered: radio galaxies, low-peaked BL Lac (LBL) objects, and quasars. BL Lacertae was the first LBL object that has been detected at VHE. With the MAGIC

Available from the Minor Planet Center.

We present interferometric imaging at 33GHz, with the new superextended configuration of the Very Small Array (VSA), of a very deep decrement in the cosmic microwave background (CMB) temperature. This decrement is located in the direction of the Corona Borealis supercluster, at a position with no known galaxy clusters, and was discovered by a

We observed the galaxy cluster CIZA J2242.8+5301 with the Sardinia Radio Telescope to provide new constraints on its spectral properties at high frequency. We conducted observations in three frequency bands centred at 1.4, 6.6 and 19 GHz, resulting in beam resolutions of 14, 2.9 and 1 arcmin, respectively. These single-dish data were also combined

We present preliminary results from the ongoing ground-based photometric observing program of the TEP (Transit of Extrasolar Planets) network to detect planets in orbit around eclipsing binary stars. Observing eclipsing binaries overcomes the statistical improbability of planetary transits as the planetary orbital plane may be expected to be