Reference : Q 1208 + 1011 - The most distant imaged quasar, or a binary?
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/28039
Q 1208 + 1011 - The most distant imaged quasar, or a binary?
English
Magain, Pierre mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Surdej, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Vanderriest, C. [Meudon, Observatoire, France]
Pirenne, B. [European Southern Observatory, Garching, Federal Republic of Germany]
Hutsemekers, Damien mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Jan-1992
Astronomy and Astrophysics
EDP Sciences
253
Letters
13-16
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] GRAVITATIONAL LENSES ; QUASARS ; IMAGING SPECTROMETERS ; STELLAR GRAVITATION ; BINARY STARS
[en] The paper reports the discovery of a new gravitational lens candidate: the high redshift (z = 3.803) and highly luminous (V = 17.5, M[SUB]V[/SUB] = -30.3) quasar Q 1208 + 1011. As derived from the analysis of direct CCD frames taken with the ESO/MPI 2.2 m telescope, this multiple quasar consists of two pointlike images, separated by 0.45 arcsec and characterized by a brightness ratio of 3.5, in red light. Existing spectroscopic data support the gravitational lens interpretation for this system but cannot exclude the hypothesis of a binary quasar. In the former case, the spectrum suggests that, if the metallic absorption line system reported by Steidel (1990) at a redshift z = 2.9157 is associated with the deflector, the mass of the lens should be of the order of M = 7.8 x 10 exp 11 solar masses. Evaluation of a recent HST PC frame obtained for Q 1208 + 1011 within the snapshot survey for gravitational lenses confirms the above results.
Researchers ; Professionals
http://hdl.handle.net/2268/28039
http://esoads.eso.org/abs/1992A%26A...253L..13M
The authors thank SAO/NASA ADS Astronomy Abstract Service for their deposit authorization. The original publication is available at www.springerlink.com.

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