A New Microlensing Event in the Doubly-Imaged Quasar Q0957+561?

Details A New Microlensing Event in the Doubly-Imaged Quasar Q0957+561? A New Microlensing Event in the Doubly-Imaged Quasar Q0957+561?

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21910802h&link_type=abstract

American Astronomical Society, AAS Meeting #219, #108.02

Astronomy and Astrophysics

Astronomy

Scientific paper

We present evidence for ultraviolet/optical microlensing in the gravitationally lensed quasar Q0957+561. We combine new measurements from our optical monitoring campaign at the United States Naval Observatory, Flagstaff with measurements from the literature and find that the time-delay-corrected r band flux ratio mA - mB has increased by 0.06 magnitudes over a period of six years beginning in the fall of 2005. We apply our Monte Carlo microlensing analysis procedure to the composite light curves, obtaining a measurement of the optical accretion disk size, log (rs/cm) = 16.3+0.4-0.7, that is consistent with the quasar accretion disk size - black hole mass relation.

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