摘要：We conducted a multi-wavelength 6-month campaign to observe the Seyfert Galaxy NGC 7469, using the space-based observatories HST,Swift,XMM-NewtonandNuSTAR. We report the results of the spectral analysis of the seven simultaneousXMM-NewtonandNuSTARobservations. The source shows significant flux variability within each observation, but the average flux is less variable among the different pointings of our campaign. Our spectral analysis reveals a prominent narrow neutral FeKαemission line in all the spectra and weaker contributions from Fe Kβ, neutral Ni Kα, and ionized iron. We find no evidence for variability or relativistic effects acting on the emission lines, which indicates that they originate from distant material. In the joint analysis ofXMM-NewtonandNuSTARdata, a constant photon index is found (Γ = 1.78 ± 0.02) together with a high energy cut-offEcut= 170−40+60keV. Adopting a self-consistent Comptonization model, these values correspond to an average coronal electron temperature ofkT= 45−12+15keV and, assuming a spherical geometry, an optical depthτ= 2.6 ± 0.9. The reflection component is consistent with being constant and the reflection fraction is in the rangeR= 0.3−0.6. A prominent soft excess dominates the spectra below 4 keV. This is best fit with a second Comptonization component, arising from a warm corona with an averagekT= 0.67 ± 0.03 keV and a corresponding optical depthτ= 9.2 ± 0.2.
