Egret

Cerenkov

Markarian 421, showing its full spectrum over all wavelength ranges. [William Keel, University of Alabama]

Fig 19.17.

An optical image of the quasar 3C273. Notice the jet to the lower right. [H.-J. Roeser, ESO, and William Keel, University of Alabama]

Fig 19.17.

An optical image of the quasar 3C273. Notice the jet to the lower right. [H.-J. Roeser, ESO, and William Keel, University of Alabama]

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