SIMBAD references

2000ApJ...544..117B - Astrophys. J., 544, 117-122 (2000/November-3)

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 P. and OSTENSEN R.

Abstract (from CDS):

We present optical I-band light curves of the gravitationally lensed double QSO B1600+434 from observations obtained at the Nordic Optical Telescope (NOT) between 1998 April and 1999 November. The photometry has been performed by simultaneous deconvolution of all the data frames, involving a numerical lens galaxy model. Four methods have been applied to determine the time delay between the two QSO components, giving a mean estimate of Δt=51±4 days (95% confidence level). This is the fourth optical time delay ever measured. Adopting a Ω=0.3, Λ=0 universe and using the mass model of Maller et al., this time delay estimate yields a Hubble parameter of H0=52+14–8 km.s–1.Mpc–1 (95% confidence level), where the errors include time delay as well as model uncertainties. There are time-dependent offsets between the two (appropriately shifted) light curves that indicate the presence of external variations due to microlensing.

Abstract Copyright:

Journal keyword(s): Cosmology: Observations - Cosmology: Distance Scale - Galaxies: Spiral - Cosmology: Gravitational Lensing - quasars: individual (QSO 1600+434{B1600+434})

Nomenclature: Fig.2: [JH97] Star N (No. 4) added.

Simbad objects: 7

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2020.10.24-17:02:20

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