A Microlensing Analysis of the Central Engine in the Lensed Quasar WFI J2033-4723
Abstract
We measured the size of the accretion disk in the gravitationally lensed quasar WFI J2033-4723 by the analysis of 13 seasons of optical imagery. Using point spread function (PSF) modeling software, we measured the brightness of each of this systems four images in 7seasons of optical monitoring data taken at the 1.3m SMARTS telescope at Cerro Tololo, Chile and in 6 seasons of optical monitoring data from the 1.5m EULER telescope in La Silla, Chile. We combined these new data with published measurements from Vuissoz et al. (2008 )to create a 13-season set of optical light curves. Employing the Bayesian Monte Carlo micro lensing analysis technique of Kochanek (2004), we analyzed these light curves to yield the first-ever measurement of the size of this quasars accretion disk log{(rs/cm)[cos(i)/0.5]1/2}=15.86 0.250.27 at the rest frame center of the R-band rest = 247 nm. Despite the fact that we now know of ~ 106 lensed quasars, the size of the central engine has been measured in only 14 of these systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 21, 2018
- Accession Number
- AD1054412
Entities
People
- Gregory E. Hyer
Organizations
- United States Naval Academy