Next Article in Journal / Special Issue
Microvariability in BL Lacertae: “Zooming” into the Innermost Blazar Regions
Previous Article in Journal
Spin and Maximal Acceleration
Previous Article in Special Issue
Suborbital Fermi/LAT Analysis of the Brightest Gamma-Ray Flare of Blazar 3C 454.3
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessFeature PaperArticle
Galaxies 2018, 6(1), 1; doi:10.3390/galaxies6010001

Multi-Wavelength Intra-Day Variability and Quasi-Periodic Oscillation in Blazars

Aryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263002, India
Received: 2 December 2017 / Revised: 15 December 2017 / Accepted: 19 December 2017 / Published: 25 December 2017
(This article belongs to the Special Issue Microvariability of Blazars)
View Full-Text   |   Download PDF [229 KB, uploaded 25 December 2017]


We reviewed multi-wavelength blazars variability and detection of quasi-periodic oscillations on intra-day timescales. The variability timescale from a few minutes to up to less than a days is commonly known as intra-day variability. These fast variations are extremely useful to constrain the size of the emitting region, black hole mass estimation, etc. It is noticed that in general, blazars show intra-day variability in the complete electromagnetic spectrum. However, some classes of blazars either do not show or show very little intra-day variability in a specific band of the electromagnetic spectrum. Blazars show rarely quasi-periodic oscillations in time series data in optical and X-ray bands. Other properties and emission mechanisms of blazars are also briefly discussed. View Full-Text
Keywords: active galaxies; BL Lacertae object: BL Lac; quasars: flat spectrum radio quasars; jets, accretion disk active galaxies; BL Lacertae object: BL Lac; quasars: flat spectrum radio quasars; jets, accretion disk
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Gupta, A.C. Multi-Wavelength Intra-Day Variability and Quasi-Periodic Oscillation in Blazars. Galaxies 2018, 6, 1.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Galaxies EISSN 2075-4434 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top