A search for the optical/IR counterpart of the probable Einstein ring source 1830-211

Details A search for the optical/IR counterpart of the probable Einstein ring source 1830-211 A search for the optical/IR counterpart of the probable Einstein ring source 1830-211

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.257..240d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 257, no. 2, July 15, 1992, p. 240-244. Research support

Astronomy and Astrophysics

Astronomy

23

Astrometry, Faint Objects, Gravitational Lenses, Infrared Astronomy, Radio Sources (Astronomy), Ring Structures, Active Galaxies, Astronomical Spectroscopy, Charge Coupled Devices, M Stars

Scientific paper

Results of deep optical and IR imaging, astrometry, and spectroscopy of the recently identified, probable Einstein ring source 1830-211 are reported. Several faint objects were found in the proximity of the radio positions. The brightest object (about 20 mag in the red) is nearly coincident with the NE component of the radio source. The object previously proposed as the possible counterpart by Subrahmanyan et al. (1990) is probably too far from the radio position to be a viable candidate, as are the other two faint, nearby objects, with typical R or I magnitudes of about 21-23. There is a possible marginal IR detection of an object nearly coincident with the SW radio component. If previous estimates of the galactic extinction along this line of sight are correct, then 1830-211 is optically very faint, and the lensing galaxy is likely to be at a redshift of at least a few tenths.

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