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

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

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...376..430n&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004- 637X), vol. 376, Aug. 1, 1991, p. 430-438. Research, supported by NSF, NASA, and Natio

Astronomy and Astrophysics

Astrophysics

64

Gravitational Lenses, Interstellar Matter, Quasars, Infrared Photometry, Visible Spectrum

Scientific paper

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.

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