Letter to the editor (Scientific journals)
J03.13 A and B: a new multiply imaged QSO candidate.
Claeskens, Jean-François; Surdej, Jean; Remy, M.
1996In Astronomy and Astrophysics, 305, p. 9-L12
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Keywords :
QUASARS (INDIVIDUAL): J03.13; GRAVITATIONAL LENSING
Abstract :
[en] Careful analysis of direct R CCD frames obtained for selected Highly Luminous Quasars in March 1993 with the MPI/ESO 2.2m telescope has revealed that the quasar J03.13 consists of at least two point-like components, constituting therefore a new gravitational lens candidate. Follow-up direct imagery of this interesting object with the New Technology Telescope (NTT) + SUSI in February 1994, using the Bessel B, R and Gunn-i filters, tends to confirm the gravitational lens hypothesis. The mean angular separation and magnitude difference between the A & B images are found to be 0.84"+/-0.03" and 2.1+/-0.1mag, respectively. A spatially unresolved, medium resolution spectrum of J03.13, obtained with the NTT + EMMI in February 1994, shows that the QSO has a redshift z=2.55, with Lyalpha and CIV absorptions at z=2.34 and MgII, MgI and FeII absorptions at z=1.085. The latter absorptions might be associated with a sigma=206km/s lens galaxy. B, R and Gunn-i photometric observations of J03.13 during 1994 and 1995 do not show evidence for flux variations exceeding 0.03mag. HST direct imagery with WFPC2 and FOS spectroscopy of J03.13 A & B are planned during cycle 5.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Claeskens, Jean-François ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Remy, M.
Language :
English
Title :
J03.13 A and B: a new multiply imaged QSO candidate.
Publication date :
January 1996
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
305
Pages :
L9-L12
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 August 2009

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