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- W1982138998 abstract "We present our long-term Chandra X-ray monitoring data for the gravitationally lensed quasar Q2237+0305 with 20 epochs spanning 10 years. We easily detect microlensing variability between the images in the full (0.2–8 keV), soft (0.2–2 keV), and hard (2–8 keV) bands at very high confidence. We also detect, for the first time, chromatic microlensing differences between the soft and hard X-ray bands. The hard X-ray band is more strongly microlensed than the soft band, suggesting that the corona above the accretion disk thought to generate the X-rays has a non-uniform electron distribution, in which the hotter and more energetic electrons occupy more compact regions surrounding the black holes. Both the hard and soft X-ray bands are more strongly microlensed than the optical (rest-frame UV) emission, indicating that the X-ray emission is more compact than the optical, confirming the microlensing results from other lenses." @default.
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- W1982138998 date "2011-09-26" @default.
- W1982138998 modified "2023-10-11" @default.
- W1982138998 title "DISCOVERY OF ENERGY-DEPENDENT X-RAY MICROLENSING IN Q2237+0305" @default.
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- W1982138998 doi "https://doi.org/10.1088/2041-8205/740/2/l34" @default.
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