Kerr-Schild solutions of the Einstein-Maxwell field equations, containing semi-infinite axial singular lines, are investigated. It is shown that axial singularities break up the black hole, forming holes in the horizon. As a result, a tubelike region appears which allows matter to escape from the interior without crossing the horizon. It is argued

We present integral field spectroscopic observations of the quadruple-lensed QSO SDSS 1004+4112 taken with the fiber system INTEGRAL at the William Herschel Telescope on 2004 January 19. In 2003 May, a blueward enhancement in the high-ionization lines of SDSS 1004+4112A was detected, and then it faded. Our observations are the first to note a

The ESO Very Large Telescope Interferometer (VLTI) is the first general-user interferometer that offers near- and mid-infrared long-baseline interferometric observations in service and visitor mode to the whole astronomical community. Over the last two years, the VLTI has moved into its regular science operation mode with the two science

The anomalous microwave emission detected in the Perseus molecular complex by Watson et al. has been observed at 11 GHz through dual orthogonal polarizations with the COSMOSOMAS experiment. Stokes U and Q maps were obtained at a resolution of ~0.9d for a 30°×30° region including the Perseus molecular complex. Faint polarized emission has been

The design of slitmasks for multi-object spectroscopy with OSIRIS at the GTC telescope is now possible with the OSIRIS Mask Designer tool, a Java plug-in to the well-known JSky application. Observers can use external reduced images to design new MOS masks for future observations with OSIRIS and, once the instrument is up and running, will be able