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The near-infrared counterpart of a variable galactic plane radio sourceA near-infrared counterpart to the highly variable, unresolved galactic plane radio source GT 0116 + 622 is identified. This source is of particular interest, as it has been previously suggested to be the counterpart of the gamma-ray source Cas gamma-l. The present NIR and red images detect a faint, spatially extended (3 arcsec FWHM), very red object coincident with the radio position. There is complex spatial structure which may be due in part to an unrelated superposed foreground object. Observations on multiple nights show no evidence for flux variability, despite the high amplitude variability on a time-scale of days reported for the radio source. The data are consistent with an interpretation of GT 0116 + 622 as an unusually variable, obscured active galaxy at a distance of several hundred megaparsecs, although more exotic, and in particular galactic, interpretations cannot yet be ruled out. If the object is extragalactic, the previously suggested identification with the gamma-ray source would seem unlikely.
Document ID
19920043996
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Margon, Bruce
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Phillips, Andrew C.
(Washington, University Seattle, United States)
Ciardullo, Robin
(Pennsylvania State University University Park, United States)
Jacoby, George H.
(Kitt Peak National Observatory Tucson, AZ, United States)
Date Acquired
August 15, 2013
Publication Date
March 1, 1992
Publication Information
Publication: Astronomical Journal
Volume: 103
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
92A26620
Funding Number(s)
CONTRACT_GRANT: NAG5-1630
CONTRACT_GRANT: NAG5-1253
Distribution Limits
Public
Copyright
Other

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