aUniversità di Padova and INFN Padova, I-35131 Padova, Italy
bUniversità di Trieste and INFN Trieste, I-34127 Trieste, Italy
cUniversità di Udine and INFN Trieste, I-33100 Udine, Italy
Abstract:
In this article we discuss the possibility of using the observations by GLAST of standard gamma sources, as the Crab Nebula, to calibrate imaging air Cherenkov detectors, MAGIC in particular, and optimise their energy resolution. We show that at around 100 GeV the absolute energy calibration uncertainty of Cherenkov telescopes can be reduced to 10% by means of such cross-calibration procedure.