NASA NTRS · 19720050853
Compact extragalactic nonthermal sources.
Abstract
Results of photometry, polarimetry, spectroscopy, and direct photography at visual wavelengths of four additional objects of the BL Lacertae type are reported together with infrared observations to 10 microns for one of them (OJ 287). The data indicate that these objects are compact sources of nonthermal continuum radiation. They are likely to be extragalactic, and their possible relationship to QSOs is discussed.
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Strittmatter, P. A., Serkowski, K., Carswell, R., Stein, W. A., Merrill, K. M., Burbidge, E. M.. 1972-07-01. Compact extragalactic nonthermal sources.. https://ntrs.nasa.gov/citations/19720050853
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