Results 101 to 110 of about 2,193 (179)
Blazars as Probes for Fundamental Physics
UniverseBlazars are a class of active galactic nuclei characterized by having one of their relativistic jets oriented close to our line of sight. Their broad emission spectrum makes them exceptional laboratories for probing fundamental physics.
Giorgio Galanti
doaj +1 more source
Astroparticle Physics, 1999 TeV emission can be a common characteristic of low power blazars. This is in line with the sequence of blazars relating the observed bolometric luminosity with their overall spectral energy distribution. Detecting new TeV blazars, possibly at different redshifts, is important for studying the particle acceleration process operating in the jet, and it ...
openaire +3 more sources
The Astrophysical Journal LettersWe report on multiwavelength studies of a blazar NVSS J171822+423948, which is identified as the low-energy counterpart of 4FGL J1718.5+4237, the unique γ -ray source known to be cospatial with the IceCube neutrino event IC-201221A.
Xiong Jiang +5 more
doaj +1 more source
, 2003 This review paper discusses the past and present observations of gamma-ray blazars with both space and ground-based gamma-ray telescopes (such as EGRET and current TeV telescopes), and with the VLBA. I also discuss the more sensitive gamma-ray telescopes such as AGILE and GLAST that will become available over the next several years, and how ...
openaire +2 more sources
Journal of High Energy Astrophysics, 2015 I will review recent advances in the field of blazars, highlighting the contribution of Swift. Together with other operating satellites (most notably Fermi, but also AGILE, WISE, Planck) and ground based facilities such as Cherenkov telescopes, Swift was (and is) crucial for improving our understanding of blazars.
openaire +3 more sources
Energy-dependent Polarization Angle Variability as a Robust Diagnostic for Blazar Flaring Mechanisms
The Astrophysical JournalIdentifying the physical mechanism driving blazar flares remains a central challenge in high-energy astrophysics. We show that the energy dependence of the standard deviation of the polarization angle variability ( σ _PA ) provides a powerful and robust ...
Haocheng Zhang +4 more
doaj +1 more source
Revealing High-z Fermi-LAT BL Lacs Using Swift and SARA Data with Photometric Analysis
The Astrophysical JournalBL Lacertae (BL Lac) objects are a subclass of blazar, distinguished by their featureless optical spectrum. The featureless spectrum presents a challenge in measuring the redshift of the BL Lacs.
Y. Sheng +14 more
doaj +1 more source
PMN J1310–5552: A Gamma-Ray-emitting Blazar Candidate Harboring a Cosmic Monster
The Astrophysical JournalRelativistic jets manifest some of the most intriguing activities in the nuclear regions of active galaxies. Identifying the most powerful relativistic jets permits us to probe the most luminous accretion systems and, in turn, the most massive black ...
Vaidehi S. Paliya
doaj +1 more source
, 2000 invited talk at the Workshop "Blazar Demographics and Physics" Baltimore, July 2000, ASP Conf. Series, P. Padovani and C. M. Urry eds., in press. (6 pages, LaTex, 10 PostScript figures, uses newpasp.sty).
openaire +2 more sources
Characteristics of Patients Undergoing Revision Thumb CMC Arthroplasty. [PDF]
J Hand Surg Glob OnlineCossu EC +5 more
europepmc +1 more source