R-band photometry of SBS1520+530

DOI

We present optical R-band light curves of the gravitationally lensed quasar SBS 1520+530 derived from data obtained at the Nordic Optical Telescope, from February 1999 to May 2001. A time delay of 130+/-3days (1{sigma}) is determined from the light curves. In addition, spectra of SBS 1520+530 obtained at the Keck Observatory are spatially deconvolved in order to extract the spectrum of the faint lensing galaxy, free of any contamination by the light from the bright quasar images. This spectrum indicates a lens redshift z=0.717, in agreement with one of the absorption systems found in the quasar spectra. The best mass model of the system includes a second nearby galaxy and a cluster of galaxies in addition to the main lensing galaxy. Adopting this model and an {Omega}=0.3, {Lambda}=0.7 cosmology, our time-delay measurement yields a Hubble constant of H_0_=51+/-9km/s/Mpc (1{sigma} error).

Identifier
DOI http://doi.org/10.26093/cds/vizier.33910481
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/391/481
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/391/481
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/391/481
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/391/481
Provenance
Creator Burud I.; Hjorth J.; Courbin F.; Cohen J.G.; Magain P.; Jaunsen A.O.,Kaas A.A.; Faure C.; Letawe G.
Publisher CDS
Publication Year 2002
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysical Processes; Astrophysics and Astronomy; Galactic and extragalactic Astronomy; High Energy Astrophysics; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy