A possibly new type of QSO identified through infrared measurements

Details A possibly new type of QSO identified through infrared measurements A possibly new type of QSO identified through infrared measurements

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232l.151r&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 232, Sept. 15, 1979, p. L151-L154. NSF-supported research.

Astronomy and Astrophysics

Astronomy

87

Infrared Astronomy, Quasars, Radio Sources (Astronomy), Stellar Spectra, Error Analysis, Infrared Spectra, Stellar Spectrophotometry

Scientific paper

Six objects have been detected at 2.2 microns at the positions of flat-spectrum radio sources that had no optical identifications or were identified with very faint red sources. Three of the objects were subsequently located on deep plates. The infrared-to-optical spectra of these sources can be characterized by power laws of index alpha = -3, and are therefore much steeper than the spectra of previously known QSOs. Two of the sources have varied at 2.2 microns on a time scale of one month. Sources of this sort will be discriminated against in optical searches, even if these searches disregard color in making identifications.

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