Daily Image
15-11-2007
The LOFAR sky from Effelsberg
| Submitter: | Peter Mueller and Stefan Wijnholds |
| Description: | On 29 October 2007 between 14:08h and 14:42h, the first successful data capture of intrastation correlations with all 192 signal paths of the LOFAR LBA station in Effelsberg was made with the system clock running at 160 MHz. One day later the experiment was successfully repeated at 200 MHz. This map is the result of imaging the uncalibrated (!) correlations between the x-dipoles for a single 156 kHz subband at 42.03 MHz after 1 s integration. This all-sky map shows Cassiopeia A, Cygnus A, the galactic plane and the North Polar Spur. It also shows a source on the northwestern horizon that begs further investigation. Possible candidates are reflections off the 100m telescope, or radiation from its engines or from the nearby fence. Currently, our German colleagues are working hard to build their own data reduction pipeline, which will definitely be used to clarify the origin of this interfering source by studying its spectral and spatial details. It is, however, very encouraging that even the uncalibrated data already yield this image quality. This demonstrates that the cooperation between MPIfR and the LOFAR roll-out team has led to a successful first European LBA station. |
| Copyright: | ASTRON / MPIfR |
| Tweet |  |