Size measurements of the quasar X-ray continuum emission region by analysis of microlensing in Chandra imagery

Chelsea L. MacLeod, Christopher W. MorGan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microlensing offers a unique way to constrain the physical extent of different emission regions in a lensed quasar, putting to test various accretion and continuum emission models. We perform a microlensing analysis using six Chandra observations (spanning six years) of the lensed quasar SDSS 0924+0219 (redshift zs =1.52), in which X-ray microlensing variability is detected with high confidence. The system exhibits pronounced microlensing variability in the X-rays compared to the optical, indicating a comparatively small extent of r 1/2<3.8×104 cm (95% confidence) for the X-ray continuum emitting region, near the inner edge of the accretion disk.

Original languageEnglish
Title of host publicationProceedings of the International Astronomical Union
PublisherCambridge University Press
Pages240-241
Number of pages2
Volume9
EditionS304
ISBN (Print)9781107045248
DOIs
Publication statusPublished - 2014

Publication series

NameProceedings of the International Astronomical Union
NumberS304
Volume9
ISSN (Print)17439213
ISSN (Electronic)17439221

Keywords

  • galaxies: active
  • quasars: general

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