Fig. 16.
Download original image
Mean photon indices derived by Swift-XRT using Giommi et al. (2019) and eROSITA, following the color scheme introduced in Fig. 3. The uncertainties of the Swift-XRT photon indices represent the minimum and maximum values provided by Giommi et al. (2019). The solid line represents unity. Differences are observed, indicating that blazars are variable in their spectral properties.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.