NuSTAR Observations of a Varying-flux Quasar in the Epoch of Reionization

NuSTAR Observations of a Varying-flux Quasar in the Epoch of Reionization

With enough X-ray flux to be detected in a 160 s scan by SRG/eROSITA, the z = 6.19 quasar CFHQS J142952+544717 is, by far, the most luminous X-ray source known at z  > 6. We present deep (245 ks) NuSTAR observations of this source; with ∼180 net counts in the combined observations, CFHQS J142952+...

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Main Authors: Lea Marcotulli, Thomas Connor, Eduardo Bañados, Peter G. Boorman, Giulia Migliori, Brian W. Grefenstette, Emmanuel Momjian, Aneta Siemiginowska, Daniel Stern, Silvia Belladitta, C. C. Cheung, Andrew Fabian, Yana Khusanova, Chiara Mazzucchelli, Sofía Rojas-Ruiz, C. Megan Urry
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal Letters
Subjects:
Quasars
Radio loud quasars
X-ray astronomy
X-ray quasars
Time domain astronomy
Online Access:https://doi.org/10.3847/2041-8213/ad94ee
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https://doi.org/10.3847/2041-8213/ad94ee

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