An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434

Burud, I.; Hjorth, J.; Jaunsen, A. O.; Andersen, M. I.; Korhonen, H.; Clasen, J. W.; Pelt, J.; Pijpers, F. P.; Magain, Pierre; Østensen, R. H.

doi:10.1086/317213

Cited by 78 publications

(117 citation statements)

References 23 publications

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“…Figure 22 shows the result of the simultaneous modeling of 5 systems with time delays obtained at the NOT. These are RX J0911+055 (Hjorth et al 2002), SBS B1520+530, (Burud et al 2002b), B1600+434 (Burud et al 2000) and J0951+263 (Jakobsson et al 2005) and the time delay of SDSS J1206+4332 reported in this paper. On the histogram the results of our simultaneous modeling of the 5 QSOs are presented.…”

Section: Simultanous Modelingsupporting

confidence: 54%

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Results of optical monitoring of 5 SDSS double QSOs with the Nordic Optical Telescope

Paraficz¹,

Hjorth²,

Elíasdóttir

2009

A&A

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We present optical R-band light curves of five SDSS double QSOs (SDSS J0903+5028, SDSS J1001+5027, SDSS J1206+4332, SDSS J1353+1138, SDSS J1335+0118) obtained from monitoring at the Nordic Optical Telescope (NOT) between September 2005 and September 2007. We also present analytical and pixelated modeling of the observed systems. For SDSS J1206+4332, we measured the time delay to be Δτ = 116 +4 −5 days, which, for a singular isothermal ellipsoid model, corresponds to a Hubble constant of 73 +3 −4 km s −1 Mpc −1 . Simultaneous pixelated modeling of five other systems for which a time delay has now been previously measured at the NOT leads to H 0 = 61.5 +8 −4 km s −1 Mpc −1 . Finally, by comparing light curves of the two images of each system, suitably shifted by the predicted or observed time-delays, we found no evidence of microlensing variability over the course of the monitoring period.

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Section: Simultanous Modelingsupporting

confidence: 54%

“…The algorithm has been implemented in various analysis of quasars (Burud et al 2000(Burud et al , 2002aHjorth et al 2002;Jakobsson et al 2005;Vuissoz et al 2007;Eigenbrod et al 2006a).…”

Section: Photometrymentioning

confidence: 99%

Results of optical monitoring of 5 SDSS double QSOs with the Nordic Optical Telescope

Paraficz¹,

Hjorth²,

Elíasdóttir

2009

A&A

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“…Applied to the galaxy 87GB[BWE91] 1600 +4325 ABS01 by Burud et al (2000), to obtain a distance of 1,920 Mpc.…”

Section: Gravitational Lenses (G Lens)mentioning

confidence: 99%

Redshift-Independent Distances in the Nasa/Ipac Extragalactic Database: Methodology, Content, and Use of Ned-D

Steer¹,

Madore

Mazzarella

et al. 2016

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Estimates of galaxy distances based on indicators that are independent of cosmological redshift are fundamental to astrophysics. Researchers use them to establish the extragalactic distance scale, to underpin estimates of the Hubble constant, and to study peculiar velocities induced by gravitational attractions that perturb the motions of galaxies with respect to the "Hubble flow" of universal expansion. In 2006 the NASA/IPAC Extragalactic Database (NED) began making available a comprehensive compilation of redshift-independent extragalactic distance estimates. A decade later, this compendium of distances (NED-D) now contains more than 100,000 individual estimates based on primary and secondary indicators, available for more than 28,000 galaxies, and compiled from over 2000 references in the refereed astronomical literature. This paper describes the methodology, content, and use of NED-D, and addresses challenges to be overcome in compiling such distances. Currently, 75 different distance indicators are in use. We include a figure that facilitates comparison of the indicators with significant numbers of estimates in terms of the minimum, 25th percentile, median, 75th percentile, and maximum distances spanned. Brief descriptions of the indicators, including examples of their use in the database, are given in an appendix.

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“…The background quasar is variable in both optical and radio bands, thus allowing time delay measurements from monitoring observations (Jaunsen & Hjorth 1997;. A time delay of 47 +12 −9 days has been determined from the radio monitoring , and a delay of 51 ± 4 days from the optical observations (Burud et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Sub-milliarcsec-scale structure of the gravitational lens B1600+434

Patnaik¹,

Kemball

2001

A&A

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Abstract. In the gravitational lens system B1600+434 the brighter image, A, is known to show rapid variability which is not detected in the weaker image, B . Since correlated variability is one of the fundamental properties of gravitational lensing, it has been proposed that image A is microlensed by stars in the halo of the lensing galaxy . We present VLBA observations of B1600+434 at 15 GHz with a resolution of 0.5 milliarcsec to determine the source structure at high spatial resolution. The surface brightness of the images are significantly different, with image A being more compact. This is in apparent contradiction with the required property of gravitational lensing that surface brightness be preserved. Our results suggest that both the lensed images may show two-sided elongation at this resolution, a morphology which does not necessarily favour superluminal motion. Instead these data may suggest that image B is scatter-broadened at the lens so that its size is larger than that of A, and hence scintillates less than image A.

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An Optical Time Delay Estimate for the Double Gravitational Lens System B1600+434

Cited by 78 publications

References 23 publications

Results of optical monitoring of 5 SDSS double QSOs with the Nordic Optical Telescope

Results of optical monitoring of 5 SDSS double QSOs with the Nordic Optical Telescope

Redshift-Independent Distances in the Nasa/Ipac Extragalactic Database: Methodology, Content, and Use of Ned-D

Sub-milliarcsec-scale structure of the gravitational lens B1600+434

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