TeV gamma-ray observations of the Crab and MKN 501 during moonshine and twilight
TeV gamma-ray signals from the Crab Nebula and Mkn 501 were detected with the HEGRA CT1 imaging Cerenkov telescope during periods when the moon was shining and during twilight. This was accomplished by lowering the high voltage supply of the photomultipliers in fixed steps up to 13%. No other adjustments were made and no filters were used. Laser
Kranich, D. et al.
Fecha de publicación:
10
1999