Physics – Optics
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102...34c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, July 1991, p. 34-40. Research supported by NSERC and NSF.
Physics
Optics
147
Gravitational Lenses, Light Curve, Quasars, Astrometry, Astronomical Models, Astronomical Photometry, Caustics (Optics), Magnitude, Spiral Galaxies
Scientific paper
This paper presents CCD photometry for the gravitationally lensed quasar system 2237 + 0305, in optical passbands from B through R, taken over a time period of more than 3 yr. These data provide new information about the probable microlensing event reported by Irwin et al. (1989); the rise time of this feature is approximately 26 days. Four additional independent brightness changes in the quasar images are detected.
Arnaud Jacques
Corrigan R. T.
Fahlman Gregory G.
Fletcher Murray J.
Hewett Paul C.
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