English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

PG 1115+080 is a quadruply lensed quasar at z=1.72 whose image positions arewell fit by simple models of the lens galaxy (at z=0.31). At opticalwavelengths, the bright close pair of images exhibits a modest flux ratioanomaly (factors of ~1.2-1.4 over the past 22 years) with respect to these samemodels. We show here that as observed in X-rays with Chandra, the flux ratioanomaly is far more extreme, roughly a factor of 6. The contrasting flux ratioanomalies in the optical and X-ray band confirm the microlensing hypothesis andset a lower limit on the size of the optical continuum emission region that is\~10-100 times larger than expected from a thin accretion disk model.Comment: 6 pages, slightly revised, accepted to Ap

A Strong X‐Ray Flux Ratio Anomaly in the Quadruply Lensed Quasar PG 1115+080