Aγ-ray Quasi-periodic Modulation in the Blazar PKS 0301–243?
نویسندگان
چکیده
منابع مشابه
A Quasi-Periodic Modulation of the Radio Light Curve of the Blazar PKSB0048−097
In this letter we present the results of a wavelet analysis of the radio light curve of the BLLac Object PKSB0048−097 from the University of Michigan Radio Astronomy Observatory monitoring program at 8GHz during twenty-five years, from 1979 to 2004. The results show a remarkable periodicity of 450–470 days in the early 1980s that changed to a ∼585 day periodicity in the late 1980s to early 1990...
متن کاملThe broad-band X-ray spectrum of the blazar PKS B1830−211 by Chandra and INTEGRAL
In this paper we present a broad-band study of the X-ray emission of the blazar PKS 1830−211 based on Chandra and INTEGRAL observations. Notwithstanding the high redshift (z=2.507), it is a bright X-ray source (F(2-10 keV)≃ 10 erg cms), due to gravitational lensing by an intervening galaxy at z=0.89. Previous X-ray observations attribute the observed absorption at E<2 keV to the lensing galaxy....
متن کاملBroad - band continuum and line emission of the γ - ray blazar PKS 0537 – 441
PKS 0537–441, a bright γ-ray emitting blazar, was observed at radio, optical, UV and X-ray frequencies during various EGRET pointings, often quasi-simultaneously. In 1995 the object was found in an intense emission state at all wavelengths. BeppoSAX observations made in 1998, non-simultaneously with exposures at other frequencies, allow us to characterize precisely the spectral shape of the hig...
متن کاملHelical Jet in the Gravitationally Lensed Blazar PKS 1830 - 211
Recent radio VLBI observations of the complex gravitationally lensed system PKS1830-211 have thrown up some questions with regard to the processes occuring at the heart of the blazar source at a redshift of 2.51, which is viewed almost straight down the jet axis. This work links, by a model of a helical jet tracked by ballistically ejected plasmons from a precessing nozzle, observations on the ...
متن کاملPKS 1502+106: A new and distant gamma-ray blazar in outburst discovered by the Fermi large area telescope
The Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope discovered a rapid (∼5 days duration), high-energy (E > 100 MeV) gamma-ray outburst from a source identified with the blazar PKS 1502+106 (OR 103, S3 1502+10, z = 1.839) starting on 2008 August 5 (∼23 UTC, MJD 54683.95), and followed by bright and variable flux over the next few months. Results on the gamma-ray localiza...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2017
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aa7ecd