Physics – Optics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233l...5a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 1, July 1990, p. L5-L8.
Physics
Optics
34
Absorption Spectra, Imaging Techniques, Line Spectra, Quasars, Cassegrain Optics, Gravitational Effects, Stellar Radiation, Stellar Spectra
Scientific paper
New data has been obtained for the quadruply lensed quasar H 1413 + 117 using the bidimensional spectrograph SILFID at the CFH telescope. The spectra recorded for each of the four individual images turn out to be quite similar, except for the narrow absorption line systems (probably related to the lenses) seen in images A and B and for marked differences in the spectrum of image D. When compared to the three other images, the spectrum of D shows smaller values for the emission lines/continuum ratio and a larger equivalent width for absorption features located in the blueshifted P Cygni profile. The possible explanations of these observations are briefly discussed in terms of micro-lensing and/or intrinsic variability of the source.
Angonin Marie-Christine
Remy Marc
Surdej Jean
Vanderriest Ch.
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