Infrared and visible photometry of the gravitational lens systems 2237 + 030

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Title: Infrared and visible photometry of the gravitational lens systems 2237 + 030
Author: Nadeau, Daniel; Yee, Howard; Forrest, William; Garnett, James; Ninkov, Zoran; Pipher, Judith
Abstract: As part of a program of high spatial resolution imaging of gravitationally lensed sources in the visible and IR, images of 2237 + 030 were obtained in the Gunn r and infrared J, H, K, and 3.3 micron filters. The results of the photometry of the four bright quasar components provide evidence of extinction through the lens and a determination of the extinction law in the galaxy is made. The energy distribution shows evidence of a sharp decrease of the spectral index at wavelengths longer than a rest wavelength of 1 micron. Assuming that microlensing amplification in the IR is of similar strength as in the visible, the data constrain the suggested microlensing event of August-September 1988 to a time scale of 100 days.
Description: This article may also be accessed on the publisher's website at: http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1991ApJ...376..430N&data_type=PDF_HIGH&type=PRINTER&filetype=.pdf
Record URI: http://hdl.handle.net/1850/3098
Date: 1991-08-01

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