Computer Science
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop...47m&link_type=abstract
Chandra Proposal ID #01700376
Computer Science
Chandra Proposal Id #01700376
Scientific paper
We propose AXAF observation of the gravitationally lensed quasar Q2237+0305 (Einstein Cross) during a microlensing event. We will monitor the four images of the QSO from the ground regularly to ascertain the onset of a microlensing event. As the microlensing event occurs, we will measure the variations of X-ray intensity and spectra with AXAF and compare with those taken after the event. Since only a small region of the QSO accretion disk is strongly magnified during a microlensing event, we will be able to limit the size of X-ray emitting regions of the QSO and thus the mass which is contained on scales of several AUs. If observed simultaneously with ground-based telescopes and with HST, furthermore, we will also be able to probe multi-wavelength emission properties of QSOs.
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