Chandra Monitoring of a Microlensing Event in MG J0414+0534

Details Chandra Monitoring of a Microlensing Event in MG J0414+0534 Chandra Monitoring of a Microlensing Event in MG J0414+0534

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000cxo..prop.1040c&link_type=abstract

Chandra Proposal ID #02708063

Computer Science

Chandra Proposal Id #02708063

Scientific paper

Recent Chandra monitoring of the gravitational lens (GL) system MG J0414+0534 indicate that images C and B are possibly undergoing microlensing events. The microlensing event in image B is of particular interest since it is accompanied by a five-fold increase of the equivalent width of a reprocessed narrow Fe Ka line in the spectrum of image B. This sudden increase can be explained with a caustic crossing that selectively enhances a strip of the reflection emission region of the accretion disk. The main goal of the proposed DDT observations is to directly probe the various emission regions of an accretion disk from scales of a few hundred gravitational radii down to the event horizon of the black hole. We expect to achieve this goal by monitoring changes in the line energy, intensity, and profile of an Fe Ka line in image B as a magnification caustic is traversing the accretion disk of the distant z = 2.64 radio loud quasar MG J0414+0534.

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