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Disk-Corona Energy Balance Evolves with Flux State in the Quasar PDS 456
We investigate the long-term X-ray spectral evolution of the highly luminous, radio-quiet quasar PDS 456 using AstroSat observations obtained in 2019 and 2021 together with archival XMM-Newton, NuSTAR and Suzaku observations spanning 2001-2024. The AstroSat observations provide valuable coverage fol
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