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The Astrophysical Journal  ·  14 August 2026  ·  From issue 22

Young black hole systems almost never produce detectable gamma rays, a sky search shows.

Ying-Ying Gan, Kai Wang et al., Searching for γ -Ray Emission from a Bona Fide Compact Symmetric Object Sample: A γ -Ray Signal near GB6 J0906+4124, The Astrophysical Journal.

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