Is the Spin of the Black Hole in GX 339–4 Negative?

We have studied the accreting black hole binary GX 339–4 using two highly accurate broadband X-ray data sets in very soft spectral states from simultaneous NICER and NuSTAR observations. Joint fitting of both data sets with relativistic models of the disk and its Comptonization and reflection allows...

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Bibliographic Details
Main Authors: Andrzej A. Zdziarski, Srimanta Banerjee, Michał Szanecki, Ranjeev Misra, Gulab Dewangan
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal Letters
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Online Access:https://doi.org/10.3847/2041-8213/adb62e
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