Using NASA’s Fermi spacecraft, astronomers have conducted a long-term monitoring campaign of a blazar known as S5 1803+784 and have identified several gamma-ray and optical flares from this source. The finding is detailed in a paper published February 19 on arXiv.org. Source: https://phys.org/news/2021-03-gamma-ray-optical-flares-blazar-s5.html…
Tag: blazar
Research investigates variability of the blazar Mrk 421
Astronomers from Switzerland and Germany have performed multiwavelength observations of a high-synchrotron-peaked blazar known as Mrk 421. Results of this observational campaign provide more insights into the variability of gamma-ray emission from this source. The study was published January 26 on arXiv.org. Source: https://phys.org/news/2021-02-variability-blazar-mrk.html…
Suzaku observations find X-ray intraday variability of the blazar PKS 2155−304
Using the Suzaku satellite, astronomers have examined a very high energy (VHE) blazar known as PKS 2155−304. They found that the source exhibits an X-ray intraday variability, which could improve the understanding of its nature. The finding is reported in a paper published January 15 on arXiv.org. Source: https://phys.org/news/2021-01-suzaku-x-ray-intraday-variability-blazar.html…
A blazar in the early Universe
The supersharp radio ‘vision’ of the National Science Foundation’s Very Long Baseline Array (VLBA) has revealed previously unseen details in a jet of material ejected at three-quarters the speed of light from the core of a galaxy some 12.8 billion light-years from Earth. The galaxy, dubbed PSO J0309+27, is a blazar, with its jet pointed toward Earth, and is the brightest…
Observations investigate the neutrino emitting blazar TXS 0506+056
Astronomers have performed spectroscopic observations of a neutrino-emitting blazar known as TXS 0506+056. Results of this observational campaign, presented in a paper published November 28 on the arXiv pre-print server, shed more light on the nature of this mysterious object. Source: https://phys.org/news/2020-12-neutrino-emitting-blazar-txs.html…
Inner jet of the blazar PKS 1749+096 investigated in detail
Using the Very Long Baseline Array (VLBA), astronomers have performed high-resolution observations of the blazar PKS 1749+096. Results of this observational campaign, presented in a paper published October 23 on arXiv.org, provide essential information about the properties of the blazar’s inner jet. Source: https://phys.org/news/2020-11-jet-blazar-pks.html…
Chinese astronomers investigate spectral behavior of gamma-ray blazar S5 0716+714
Using the Lijiang Observatory, astronomers from the Chinese Academy of Sciences (CAS) have inspected a gamma-ray blazar known as S5 0716+714. The observations provided important insights into the spectral behavior of this source, finding that it is brightness-dependent. The study was published August 26 on the arXiv.org preprint repository. Source: https://phys.org/news/2020-09-chinese-astronomers-spectral-behavior-gamma-ray.html…
Astronomers ponder Odd Radio Circles in space
Scientists in Australia have discovered a strange new phenomenon in deep space – “Odd Radio Circles” – that appear in radio telescope images as mysterious circles or rings. Source: https://earthsky.org/space/astronomers-ponder-odd-radio-circles-in-space…
Variability of blazar 3C 273 examined by astronomers
Using data from space observatories and ground-based telescopes, astronomers have investigated variability of a blazar known as 3C 273. The new study, presented in a paper published July 6 on the arXiv pre-print server, sheds more light on the emission from this source. Source: https://phys.org/news/2020-07-variability-blazar-3c-astronomers.html…
Emission from the blazar 1ES 1218+304 explored with NASA space telescopes
Using three NASA space observatories, astronomers have conducted a multiwavelength study of emission from a blazar known as 1ES 1218+304. Results of the investigation, presented in a paper published June 29 on arXiv.org, deliver more insights into the properties of this high-energy source. Source: https://phys.org/news/2020-07-emission-blazar-1es-explored-nasa.html…