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Title:
The triple quasar Q1115+080A, B, C - A quintuple gravitational lens image
Authors:
Young, P.; Deverill, R. S.; Gunn, J. E.; Westphal, J. A.; Kristian, J.
Affiliation:
AA(Palomar Observatory, Pasadena, Calif.), AB(Palomar Observatory, Pasadena, Calif.), AC(Palomar Observatory, Pasadena, Calif.), AD(Palomar Observatory, Pasadena, Calif.), AE(Mount Wilson and Las Campanas Observatoires, Pasadena, Calif.)
Publication:
Astrophysical Journal, Part 1, vol. 244, Mar. 15, 1981, p. 723-735. (ApJ Homepage)
Publication Date:
03/1981
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
EMISSION SPECTRA, GALACTIC CLUSTERS, GRAVITATIONAL LENSES, LINE SPECTRA, QUASARS, SPECTRUM ANALYSIS, ASTRONOMICAL PHOTOMETRY, ASTRONOMICAL SPECTROSCOPY, CARBON, CHARGE COUPLED DEVICES, FORBIDDEN BANDS, IMAGES, RED SHIFT, SPIRAL GALAXIES
Comment:
A&AA ID. AAA029.141.079
DOI:
10.1086/158750
Bibliographic Code:
1981ApJ...244..723Y

Abstract

Spectroscopy and direct imaging of Q1115+080A, B, C with a CCD camera support the hypothesis that they are gravitational images of a single object. Spectroscopy of the semiforbidden C III 1909-A emission line shows all the images to have identical spectra and redshifts (to within 100 km/s), except that B is slightly redder. Gravitational lens imaging by a massive spiral galaxy is investigated, and a quintuple image model resembling Q1115+080A, B, C is found. In this model, Q1115+080A is a highly magnified close pair of images oriented in the position angle 23 deg. An elongation Q1115+080A at this angle is seen in the CCD pictures.

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