Speaker
Dr
Miroslav Shaltev
(Albert Einstein Institute, Hannover)
Description
Isolated neutron stars are possible sources of continuous gravitational
waves. If the source parameters are known, a putative signal can be
searched at negligible computing cost. For unknown source parameters,
the weakness of the expected signal combined with the large parameter
space
to search yields an unfeasible computing cost for fully coherent
search techniques.
Therefore advanced semi-coherent search methods have been developed,
e.g., StackSlide and
the Hough transform. These methods are currently used in
distributed computing environments such as Einstein@Home.
The searches narrow down the parameter
space around possible candidates, which then need to be followed up.
We present a general two-stage method based on numerical optimization
(NOMAD), which allows for the fully coherent follow-up
of such candidates on all of the available data at a feasible
computing cost. We describe the practical application of this
procedure on the candidates from a semi-coherent Hough-transform
all-sky search.
Author
Dr
Miroslav Shaltev
(Albert Einstein Institute, Hannover)
Co-author
Dr
Reinhard Prix
(AEI, Hannover)
