Free Access

Fig. 3

thumbnail

Evolution of the pulse period from 2001 until early 2009. The historic RXTE data points of Levine et al. (2004) are shown as red crosses, the new measurements obtained with INTEGRAL are shown as stars.

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.