A 2.2-microns search for variable galactic plane radio sources

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photometry, Galactic Radio Waves, Infrared Astronomy, Radio Sources (Astronomy), B Stars, Radiant Flux Density, Stellar Color

Scientific paper

A search in the infrared for ten previously unidentified, compact, variable radio sources has yielded one possible identification. The remaining nine objects must have an average flux density less than about 0.9 mJy at 2.2 microns. The possible identification, with GT 2100 + 468, is convincing but does not help to determine whether the source is galactic or extragalactic in nature. Infrared observations of LSI +61 deg 303, previously identified with GT 0236 + 610, show it to have the colors of a reddened B star out to 2.2 microns. At longer wavelengths, there is an excess which dominates the total flux at wavelengths longer than five microns.

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