SBS 1520+530: a new gravitationally lensed system at z=1.855.

Details SBS 1520+530: a new gravitationally lensed system at z=1.855. SBS 1520+530: a new gravitationally lensed system at z=1.855.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...318l..67c&link_type=abstract

Astronomy and Astrophysics, v.318, p.L67-L70

Astronomy and Astrophysics

Astrophysics

29

Gravitational Lensing, Quasars: Emission-Lines, Quasars: Absoprtion-Lines, Quasars: Individual: Sbs 1520+530

Scientific paper

We report the discovery of a new gravitationally lensed BAL QSO SBS 1520+530 (α(2000)=15h21m44.83s, δ(2000)=52deg54'48.6") at z_em_=1.855 from the Second Byurakan Survey using observations with the 6m and 1m telescopes of SAO RAS. Two components with apparent V magnitudes 18.2mag and 18.7mag are resolved with a distance separation 1.6". The spectra, taken with the long-slit spectrograph, exhibit strong SiIV/OIV], CIV and CIII] emission lines with the redshifts 1.855+/-0.002 and 1.854+/-0.002, respectively, and two systems of metal-line absorption at z_abs_=0.7155+/-0.0009 and 0.8147+/-0.0009. The blue wing of CIV lines displays BAL futures. SBS 1520+530, the second gravitationally lensed BAL QSO, offers good opportunity for ground-based and space studies of numerous phenomena connected with physics of lensing because of its apparent magnitude and appropriate separation between companions.

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