Recording tracks of stars traversing the field of view of the Auger's fluorescence detector (FD) is a powerful to ol to monitor various FD parameters. For instance, the telescope absolute pointing and its stability during the life of the experiment, the sky quality and the uniformity of the photo catho des response, are good examples. Regular

The Whole Earth Blazar Telescope (WEBT) is an international consortium of about 30 optical observatories and 2 radio observatories devoted to blazar monitoring during optical and multifrequency campaigns. The dispersion in longitude of the WEBT members allows them to obtain dense and quasi-continuous light curves, minimizing gaps due to Earth

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The MAGIC telescope, with many technological innovations which allow the telescope to have a low energy threshold and a very fast slewing time, could be one of the first ground based experiments able to see transient phenomena like Gamma Ray Bursts. In this paper we present a study on the MAGIC telescope possibilities to observe GRBs, obtaining a