% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{SanchezZaballa:642075,
      author       = {Sanchez Zaballa, Jose Maria and Buson, Sara and Marchesi,
                      Stefano and Tombesi, Francesco and Dauser, Thomas and Wilms,
                      Joern and Azzollini, Alessandra},
      title        = {{X}-{R}ay {S}pectral {V}ariability as a {P}robe of
                      {M}ultimessenger {E}mission in {B}lazar 5{BZB}
                      {J}0630−2406},
      reportid     = {PUBDB-2025-05338, arXiv:2504.03457},
      year         = {2025},
      note         = {ApJ 988 120 (2025). 14 pages, 10 figures},
      abstract     = {X-ray observations are essential for understanding the
                      multimessenger emission mechanisms of active galactic nuclei
                      (AGN). Blazars, a subset of AGN whose X-ray emission
                      predominantly originates from relativistic jets, have been
                      proposed as promising high-energy neutrino sources. In this
                      work, we study the candidate neutrino-emitting blazar 5BZB
                      J0630-2406, which has been observed over multiple epochs
                      with the XMM-Newton, NuSTAR, Neil Gehrels Swift-XRT, and
                      eROSITA observatories. Analysis of the X-ray spectra in the
                      2.0–10.0 keV band shows significant variability, with
                      high-flux states adhering to a power-law model indicative of
                      jet emission. However, during low-flux states, the spectrum
                      reveals an additional component in hard X-rays, indicating a
                      transition from jet-dominated to multicomponent X-ray
                      emission, possibly associated with hadronic processes. To
                      investigate this spectral evolution, we tested various
                      models and found it to be consistent with coronal emission
                      or photoionized absorption processes typically observed in
                      obscured AGN. The identification of the X-ray spectral
                      variability in 5BZB J0630-2406, combined with its potential
                      for neutrino production, opens new perspectives in
                      multimessenger astrophysics of blazars, highlighting the
                      synergies between the mechanisms of the jet and the nuclear
                      environment.},
      cin          = {$Z_GA$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_GA-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613) /
                      MessMapp - Mapping Highly-Energetic Messengers throughout
                      the Universe (949555)},
      pid          = {G:(DE-HGF)POF4-613 / G:(EU-Grant)949555},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2504.03457},
      howpublished = {arXiv:2504.03457},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2504.03457;\%\%$},
      doi          = {10.3204/PUBDB-2025-05338},
      url          = {https://bib-pubdb1.desy.de/record/642075},
}