Dependence of the energy of the fundamental cyclotron line on luminosity. The two positive and three negative correlations clearly seen in the figure are derived from the pulse-to-pulse analysis (blue crosses). The red and magenta crosses are values obtained from the pulse-averaged spectra of the 2015 giant outburst and the 2016 outburst. The observations with negative p2p-correlations comprise Group 1, while Group 2 consists of two observations with positive p2p-correlations, labeled (1) and (2), respectively. The gray line reflects the “hysteresis” behavior observed with Swift/BAT (Cusumano et al. 2016).
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.