Fig. 1.
Geometry of the oblate star and the lab frame coordinate system xyz. A spot at the NS surface at co-latitude θ has a rotation phase ϕ from the observer vector 
around rotational axis z. Three unit vectors are defined for the spot: 
is normal to the surface, 
is the radius vector, and 
is the direction of emitted photon propagation.
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.