Revealing the nature of the QPO and its harmonic in GX 339-4 using frequency-resolved spectroscopy.
- Publisher: Oxford University Press
Astrophysics - High Energy Astrophysical Phenomena
arxiv: Astrophysics::High Energy Astrophysical Phenomena
We use frequency-resolved spectroscopy to examine the energy spectra of the prominent low-frequency quasi-periodic oscillation (QPO) and its harmonic in GX 339-4. We track the evolution of these spectra as the source makes a transition from a bright low/hard to hard int...