motion_since_birth¶

gammapy.utils.coordinates.motion_since_birth(v, age, theta, phi)[source]¶

Compute motion of a object with given velocity, direction and age.

Parameters:	v : `Quantity` Absolute value of the velocity age : `Quantity` Age of the source. theta : `Quantity` Angular direction of the velocity. phi : `Quantity` Angular direction of the velocity.
Returns:	dx : `Quantity` Displacement in x direction dy : `Quantity` Displacement in y direction dz : `Quantity` Displacement in z direction vx : `Quantity` Velocity in x direction vy : `Quantity` Velocity in y direction vz : `Quantity` Velocity in z direction