https://arxiv.org/abs/1301.1800
Abstract page for arXiv paper 1301.1800: X-ray emission from the Ultramassive Black Hole candidate NGC1277: implications and speculation on its origin
ultramassive black holex rayemission
https://www.wionews.com/science/scientists-discover-ultramassive-black-hole-that-can-fit-30-billion-suns-577144
WION (World Is One News) brings latest & breaking news from South Asia, India, Pakistan, Bangladesh, Nepal, Sri Lanka and rest of the World in politics,...
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https://www.indy100.com/science-tech/ultramassive-black-hole-larger-sun-2674390882
Dec 11, 2025 - A new ultramassive black hole has been discovered, and we’re not even going to try to get our heads around its scale. The enormous object observed for the...
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