Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325..644n&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 325, Feb. 15, 1988, p. 644-650.
Astronomy and Astrophysics
Astrophysics
23
Astronomical Photography, Gravitational Lenses, Image Processing, Quasars, Image Reconstruction, Image Resolution, Stellar Magnitude, Ultraviolet Photography
Scientific paper
The authors have observed, at the CFH telescope with the time-resolved imaging mode of the ESA Photon Counting Detector, the field of the double QSO 2345+007 in the UV band. Integrated images have a 0arcsec.55 - 0arcsec.60 resolution. Improvement in resolution has been achieved by applying image restoration techniques. The results show that component B is made of two subcomponents of roughly equal intensity, 0arcsec.36 apart. The line of their centers makes a slight (≡12°) angle with the AB direction. At least one of the two subcomponents, B2, is elongated in a direction perpendicular to the AB direction. This result gives new support for the gravitational lens hypothesis: A and the two subcomponents of B, B1 and B2, are different images of the same source quasar, with B2 being better interpreted as an unresolved multiple component image than a really extended object.
di Serego Alighieri Sperello
Lelievre Gerard
Llebaria Antoine
Macchetto Ferdinando D.
Nieto Jean-Luc
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