NASA NTRS ยท 19900014002
The high energy source 3C 273
Abstract
The properties of 3C 273 are reviewed and an attempt is made to find an answer to the question why 3C 273 is the only extragalactic source so far, which was detected at energies greater than or equal to 50 MeV.
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Vonmontigny, Corinna. 1990-05-01. The high energy source 3C 273. https://ntrs.nasa.gov/citations/19900014002
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