CLASS B0739+366: A new two-image gravitational lens system

Abstract

We present the discovery of CLASS B0739+366, a new gravitational lens system from the Cosmic Lens All-Sky Survey. Radio imaging of the source with the Very Large Array (VLA) shows two compact components separated by $0\farcs54$, with a flux density ratio of $\sim$ 6:1. High-resolution follow-up observations using the Very Long Baseline Array (VLBA) at 1.7 GHz detect weak, parity-reversed jet emission from each of the radio components. Hubble Space Telescope NICMOS F160W observations detect infrared counterparts to the lensed images, as well as an extended object between them which we identify as the lensing galaxy. Redshifts for the galaxy and lensed source have not yet been obtained. For typical lens and source redshifts of $z=0.5$ and $z=1.5$, respectively, preliminary mass modeling predicts a time delay of $\sim 7h^{-1}$ days in a flat ${\Omega }_M=1.0$ universe. The small predicted time delay and weak radio components will make CLASS B0739+366 a challenging target for Hubble constant determination.

15 pages, including 6 figures, to be published in AJ

References in corpus (1)

• CFHT AO Imaging of the CLASS Gravitational Lens System B1359+154

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• The Cosmic Lens All-Sky Survey:II. Gravitational lens candidate selection and follow-up
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• Constraints on the Inner Mass Profiles of Lensing Galaxies from Missing Odd Images
• Why is the Fraction of Four-Image Radio Lens Systems So High?
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• The Detection of Pure Dark Matter Objects with Bent Multiply Imaged Radio Jets
• The new two-image gravitational lens system CLASS B2319+051
• Improving efficiency in radio surveys for gravitational lenses
• Measuring gravitational lens time delays using low-resolution radio monitoring observations
• Constraining Photon Mass by Energy-Dependent Gravitational Light Bending
• Finding Lensed Radio Sources with the VLA Sky Survey
• Cusped Mass Density Profiles and Magnification Ratios of Double Image Gravitational Lenses