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M. Martínez

3 articles · 30 co-authors · latest: 2026-05-15

Space Beacons: LST-1 Telescope Begins Tracking

For two years, the LST-1 prototype tracked the flickering of distant space beacons — blazars. At their centers, supermassive black holes act like giant spotlights, shooting out narrow beams of gamma rays. The telescope didn't catch the rays themselves, but their atmospheric footprints — faint blue f
arXiv:2510.03702 · 2025-10-04

Distant Quasar Sets Gamma-Ray Record

Astronomers observed a gamma-ray flare from a quasar — the ultra-bright core of a galaxy with a black hole inside. The light traveled for 7 billion years. Unexpectedly, it turned out to have originated not from the hole itself, but from the dust ring surrounding it. This helps us understand how blac
arXiv:2601.03873v2 · 2026-01-07

Ghost Black Holes: The Hunt That Comes Up Empty

An analysis of black hole mergers over the past year of observations reveals: almost all signals come from ordinary black holes of stellar origin. Primordial black holes, if they exist at all, make up only a tiny fraction of dark matter.
arXiv:2605.15749 · 2026-05-15