The X-ray stable emission in MCG-6-30-15
Abstract
The flux-flux plot (FFP) method is a model-independent way that allows to extract the variable and stable components from the X-ray spectra of AGNs showing strong variability. We applied this method to the simultaneous XMM-Newton and NuSTAR observations of MCG-6-30-15, in the 0.3-40 keV range. The constant component, in the 4-40 keV energy range, is consistent a neutral reflection from distant material ( D > 1.56 × 10^{4} R_{g}) revealing an iron K line in the 6-7 keV band and a Compton hump peaking at ∼ 20 keV. It contributes to ∼ 20% of the total emission, on average. The variable component is consistent with a power-law spectrum with a constant photon index (Γ ∼ 2) varying only in normalization without any hint of a relativistic ionized reflection. The FFPs below 3 keV show a clear evidence of a variable warm absorber with the possibility of having a stable component at these low energies.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf..286K