Microlensing of Q2237+0305: Simulations and Statistics

Details Microlensing of Q2237+0305: Simulations and Statistics Microlensing of Q2237+0305: Simulations and Statistics

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aca....56..171j&link_type=abstract

Acta Astronomica, v.56, pp.171-182, (2006).

Astronomy and Astrophysics

Astronomy

1

Quasars: Individual: Qso 2237+0305, Gravitational Lensing

Scientific paper

Using Monte Carlo simulations we produce several microlensing amplification maps for each of the four images of the quasar QSO 2237+0305. With FFT algorithms we convolve the maps with the filters representing sources of different sizes and surface brightness distributions. The cuts of the convolved maps represent fragments of synthetic light curves for corresponding sources. Since FFT method is not time consuming we can examine large number of cases and obtain several statistical characteristics of image variability. A simple test involving the measured amplitude of the apparent QSO variability during approx 5 years of OGLEIII observations gives an estimate of the relative source velocity, 4000+/-2000 km/s.

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