Browsing Research publications by Author "Matt, G."

Now showing items 1-2 of 2

    • The high energy X-ray probe (HEX-P): constraining supermassive black hole growth with population spin measurements 

      Piotrowska, J. M.; García, J. A.; Walton, D. J.; Beckmann, R. S.; Stern, D.; Ballantyne, D. R.; Wilkins, D. R.; Bianchi, S.; Boorman, P. G.; Buchner, J.; Chen, C.-T.; Coppi, P.; Dauser, T.; Fabian, A.C.; Kammoun, E.; Madsen, K.; Mallick, L.; Matt, G.; Matzeu, G.; Nardini, E.; Pizzetti, A.; Puccetti, S.; Ricci, C.; Tombesi, F.; Torres-Albà, N.; Wong, K.-W. (2024-03-28)
      Constraining the primary growth channel of supermassive black holes (SMBHs) remains one the most actively debated questions in the context of cosmological structure formation. Owing to the expected connection between SMBH ...

    • Transient obscuration event captured in NGC 3227. I. Continuum model for the broadband spectral energy distribution 

      Mehdipour, M.; Kriss, G. A.; Kaastra, J. S.; Wang, Y.; Mao, J.; Costantini, E.; Arav, N.; Behar, E.; Bianchi, S.; Branduardi-Raymont, G.; Brotherton, M.; Cappi, M.; Marco, B. De; Gesu, L. Di; Ebrero, J.; Grafton-Waters, S.; Kaspi, S.; Matt, G.; Paltani, S.; Petrucci, P. -O.; Pinto, C.; Ponti, G.; Ursini, F.; Walton, D. J. (2021-06-28)
      From Swift monitoring of a sample of active galactic nuclei (AGN) we found a transient X-ray obscuration event in Seyfert-1 galaxy NGC 3227, and thus triggered our joint XMM-Newton, NuSTAR, and Hubble Space Telescope (HST) ...