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Astrophysical Journal Letters News

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It's the most accurate measure achieved until now of such a small and distant object, and it has been achieved thanks to the so-called gravitational microlensing effect, caused by stars belonging to a galaxy between us and the quasar, and which may magnify tiny regions within the quasar.
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In a first, a team including an Indian-origin astronomer has found evidence for a new intermediate-mass black hole about 5,000 times the mass of the Sun.






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