SIMBAD references

2011ApJ...739L..28J - Astrophys. J., 739, L28 (2011/September-3)

The faintest radio source yet: expanded very large array observations of the gravitational lens SDSS J1004+4112.


Abstract (from CDS):

We present new radio observations of the large-separation gravitationally lensed quasar SDSS J1004+4112, taken in a total of 6 hr of observations with the Expanded Very Large Array. The maps reach a thermal noise level of approximately 4 µJy. We detect four of the five lensed images at the 15-35 µJy level, representing a source of intrinsic flux density, after allowing for lensing magnification, of about 1 µJy, intrinsically probably the faintest radio source yet detected. This reinforces the utility of gravitational lensing in potentially allowing us to study nJy-level sources before the advent of the Square Kilometre Array. In an optical observation taken three months after the radio observation, image C is the brightest image, whereas the radio map shows flux density ratios consistent with previous optical observations. Future observations separated by a time delay will give the intrinsic flux ratios of the images in this source.

Abstract Copyright:

Journal keyword(s): gravitational lensing: strong - quasars: individual: SDSS J1004+4112 - radio continuum: galaxies

Errata: erratum vol. 900, art. L15 (2020)

Simbad objects: 15

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