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Title: Extremes of the jet–accretion power relation of blazars, as explored by NuSTAR

Hard X-ray observations are crucial to study the non-thermal jet emission from high-redshift, powerful blazars. We observed two bright z > 2 flat spectrum radio quasars (FSRQs) in hard X-rays to explore the details of their relativistic jets and their possible variability. S5 0014+81 (at z = 3.366) and B0222+185 (at z=2.690) have been observed twice by the Nuclear Spectroscopic Telescope Array (NuSTAR) simultaneously with Swift/XRT, showing different variability behaviors. We found that NuSTAR is instrumental to explore the variability of powerful high-redshift blazars, even when no gamma-ray emission is detected. The two sources have proven to have respectively the most luminous accretion disk and the most powerful jet among known blazars. Furthermore, thanks to these properties, they are located at the extreme end of the jet-accretion disk relation previously found for gamma-ray detected blazars, to which they are consistent.
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [5] ;  [10]
  1. Univ. di Milano - Bicocca, Milano (Italy)
  2. INAF - Osservatorio Astronomico di Brera, Merate (Italy)
  3. ASI Science Data Center, Roma (Italy); INAF - Osservatorio Astronomico di Roma, Monteporzio Catone (Italy)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  6. Univ. of California, Berkeley, CA (United States)
  7. Technical Univ. of Denmark, Lyngby (Denmark)
  8. Technical Univ. of Denmark, Lyngby (Denmark); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  9. Columbia Univ., New York, NY (United States)
  10. NASA Goddard Space Flight Center, Greenbelt, MD (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 0035-8711
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 462; Journal Issue: 2; Journal ID: ISSN 0035-8711
Royal Astronomical Society
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
Country of Publication:
United States
79 ASTRONOMY AND ASTROPHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; galaxies: active; quasars: general; quasars: individual: B0222+185; quasars: individual: S5 0014+813; X-rays: general
OSTI Identifier: