Serendipitous VERITAS observations do not detect NGC 4278, but upper limits bound the quasi-quiet TeV index below 3.13 and, with Fermi-LAT, bracket the SED peak between 100 GeV and 2 TeV within an example hadronic-corona model.
Relativistic Jets in Radio-Weak Quasars and LINER Galaxies
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abstract
We discuss radio observations of a sample of radio-weak and radio-intermediate quasars which demonstrate that - just like their radio-loud counterparts - radio-weak quasars too have relativistic jets in their nuclei. Moreover, a VLA survey of nearby LINER galaxies reveals a relatively large number of flat-spectrum radio cores. It is suggested that those cores are also best explained by moderately relativistic jets (gamma~2) produced by a central engine.
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VERITAS Observations Contemporaneous with the LHAASO Detection of NGC 4278
Serendipitous VERITAS observations do not detect NGC 4278, but upper limits bound the quasi-quiet TeV index below 3.13 and, with Fermi-LAT, bracket the SED peak between 100 GeV and 2 TeV within an example hadronic-corona model.