1. Home
    2. Journals
    3. Journal of Astrophysics and Astronomy

    • G. G. Deng

      Articles written in Journal of Astrophysics and Astronomy

    • Volume 32 Issue 1-2 March 2011 pp 79-86 Part 2. Blazar Observations in Infrared and Optical

      Methods for the Quasi-Periodic Variability Analysis in Blazars

      Y. Liu J. H. Fan H. G. Wang G. G. Deng

      More Details Abstract Fulltext PDF

      In this work, four methods are introduced to analyse the unevenly sampled data. The four methods are power spectral density, autocorrelation function, structure function and Jurkevich method. Some interesting mathematical links are derived amongst the four methods. These links show that the four methods have the same performance. For the Jurkevich method, the effect of the width of bins is apparent. If the width is half the time scale, the method has better performance.

    • Volume 35 Issue 3 September 2014 pp 257-260 Part II: Blazar Observations in Infrared and Optical

      Possible Lognormal Distribution of Fermi-LAT Data of OJ 287

      G. G. Deng Y. Liu J. H. Fan H. G. Wang

      More Details Abstract Fulltext PDF

      OJ 287 is a BL Lac object at redshift 𝑧 = 0.306 that has shown double-peaked bursts at regular intervals of 12 yr during the last 40 yr according to previous research. Some of the AGN 𝛾 ray power density shows a white noise process, while some others shows a red noise process. Some AGN flux presents normal or log-normal distribution. The two processes have an intrinsic relationship with centre black hole emission mechanism. We present the results of the analysis of the Fermi-LAT data. We review some problems concerning the random process.

  • Journal of Astrophysics and Astronomy | News

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.

Contact | Site index