Now showing items 1-5 of 5

    • 2006 May-July major radio flare episodes in Cygnus X-3: Spectrotiming analysis of the X-ray data 

      Koljonen, Karri I. I.; McCollough, Michael L.; Hannikainen, Diana Carina; Droulans, Robert (2013)
      We analyse in detail the X-ray data of the microquasar Cygnus X-3 obtained during major radio flaring episodes in 2006 with multiple observatories. The analysis consists of two parts: probing the fast (~1min) X-ray spectral ...
    • AGILE detection of Cygnus X-3 γ-ray active states during the period mid-2009/mid-2010 

      Bulgarelli, A.; Tavani, Marco; Chen, Andrew; Evangelista, Yuri; Trifoglio, Massimo; Gianotti, Fulvio; Piano, Giovanni; Sabatini, Sabina; Striani, Edoardo; Hannikainen, Diana Carina (2012-02)
      Context. Cygnus X-3 (Cyg X-3) is a well-known microquasar producing variable emission at all wavelengths. Cyg X-3 is a prominent X-ray binary producing relativistic jets, and studying its high energy emission is crucial ...
    • The AGILE monitoring of Cygnus X-3: transient gamma-ray emission and spectral constraints 

      Piano, Giovanni; Tavani, Marco; Trois, Alessio; Giuliani, Andrea; Bulgarelli, Andrea; Evangelista, Yuri; Coppi, Paolo S.; Del Monte, Ettore D.; Sabatini, Sabina; Hannikainen, Diana Carina (2012-09-14)
      We present the AGILE-GRID (Astro-rivelatore Gamma a Immagini LEggero – Gamma-Ray Imaging Detector) monitoring of Cygnus X-3, during the period between November 2007 and July 2009. We report here the whole AGILE-GRID ...
    • Modeling the X-ray light curves of Cygnus X-3 Possible role of the jet 

      Vilhu, Osmi; Hannikainen, Diana Carina (2013-02)
      Context. We address the physics behind the soft X-ray light curve asymmetries in Cygnus X-3, a well-known microquasar. Aims. Observable eff ects of the jet close to the line-of-sight were investigated and interpreted within ...
    • The re-occurrence of mHz quasi-periodic oscillations in Cygnus X-3 

      Koljonen, Karri I. I.; Hannikainen, Diana Carina; McCollough, Michael L. (2011-09-01)
      We have re-analysed archivalRXTEdata of the X-ray binary Cygnus X-3 with a view to investigate the timing properties of the source. As compared to previous studies, we use an extensive sample of observations that include ...