Using the Arcminute Microkelvin Imager (AMI) at 16GHz and the Very Small Array (VSA) at 33GHz to make follow-up observations of sources in the New Extragalactic WMAP Point Source catalogue, we have investigated the flux density variability in a complete sample of 97 sources over time-scales of a few months to ~1.5yr. (1 data file).

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Extreme ultraviolet (EUV) and X-ray emission is of great importance in several phenomena related to the formation of planetary systems and the atmospheres of planets. The atmospheric composition and the mass of an exoplanet are partly dependent on the X-ray and EUV radiation received during the first stages of formation and even during main

We report the X-ray detection of Nova Vul 2007 (S. Nakano, IAUC 8861) with the Swift X-ray Telescope in a 6.7ks observation obtained on 2007 October 18 at UT 01:05. The XRT spectrum contains 192 X-ray photons and is largely consistent with a thermal plasma model with temperature kT=0.2 +0.4/-0.07 keV and absorbing column NH=(8 +2/-3)e21 cm^-2. A

We present ``BiRD'', a tool for the browsing and visualisation of XMM-Newton high-resolution spectra. The dataset accessed by this utility consists of RGS spectra uniformly processed and calibrated, and fits therefore very nicely into the VO framework. The tool here described provides also additional information that can be relevant to the

Stellar bars can lead to gas inflow toward the center of a galaxy and stimulate nuclear star formation. However, there is no compelling evidence on whether they also feed a central supermassive black hole: by measuring the fractions of barred active and inactive galaxies, previous studies have yielded conflicting results. In this paper, we aim to