Brightness and colour variations in the Q2237+0305 gravitational lens system from observations of 1997 and 1998

Details Brightness and colour variations in the Q2237+0305 gravitational lens system from observations of 1997 and 1998 Brightness and colour variations in the Q2237+0305 gravitational lens system from observations of 1997 and 1998

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnt...16..346d&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 16, no. 4, p. 346-354

Computer Science

2

Scientific paper

The results of two-year observations of the known Q2237+0305 gravitational lens system (Einstein Cross) with the Maidanak 1.5-meter telescope are presented. A contribution of these observations to the existing R lightcurves of four quasar components consists of 12 dates during 133 days in 1997, and of 15 dates during 115 days in 1998. Three-colour observations were fulfilled for three nights in 1997 and for four nights in 1998 which enabled to estimate the relative (V-I) colours of the components and to trace their behavior by comparing with the observing data of previous years. The observed colour variations are argued to be real. The importance of multicolour observations of the Q2237+0305 system is noticed.

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