IAUC 7271 available at Central Bureau for Astronomical Telegrams.

The properties of the photosphere in magnetic and non magnetic regions, at two levels in the solar atmosphere, have been studied, using two virtually simultaneous time sequences of 109 mn duration of CCD images taken at the Vacuum Tower Telescope of the Sacramento Peak Observatory. The selected wavelengths correspond to the true continuum and to

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Gamma-ray bursts (GRBs) are produced by rare types of massive stellar explosion. Their rapidly fading afterglows are often bright enough at optical wavelengths that they are detectable at cosmological distances. Hitherto, the highest known redshift for a GRB was z = 6.7 (ref. 1), for GRB080913, and for a galaxy was z = 6.96 (ref. 2). Here we report

IAUC 5879 available at Central Bureau for Astronomical Telegrams. IAUC 5879 available at Central Bureau for Astronomical Telegrams.

In the context of the EPOXI mission, at the beginning of November 2010 the comet 103P/Hartley 2 was visited by the Deep-Impact spacecraft, that passed at only 700 km from its nucleus. To connect spatial small scales, as seen from the spacecraft, to large ones, the comet was the target of a wide campaign of remote observations involving many