Gravitational Wave Data Analysis: Parameter Estimation and Template Spacing

Anala, K.S. (2017) Gravitational Wave Data Analysis: Parameter Estimation and Template Spacing. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Anala K. S. (12MS008)) 12MS008.pdf - Submitted Version Restricted to Repository staff only Download (1MB)

Abstract

Gravitational waves are the ripples in space-time or can be called the perturbations in the metric. They are generated during the coalescence of massive bodies like blackholes and neutron stars, during supernovae explosions etc. Gravitational waves were produced during the inflation period also. These perturbations travel through space-time with the speed of light and carry with them the information about their sources. One of the important property of these waves is that they weakly interact with matter as a result very little information carried by them will be lost during the journey. Gravitational waves can be used to gather information about the unexplored regions of the Universe and also to learn about different astrophysical systems. Gravitational wave distorts the space through which it travels. The strain it produces is very small that extremely sensitive detectors are required to detect these waves. The Laser Interferometer Gravitational-Wave Observatory has succeeded in detecting them. Matched filtering technique have been used to estimate the parameters of the detected gravitational wave signal. Different template waveforms created from waveform models are used for this technique. The matched filter technique have been studied here by attempting to estimate the mass and spin of a signal waveform. The detected signal will be passed through different template banks containing large number of template waveforms for matched filtering. Arranging templates in such template banks should be done in such a way that it will have less computational cost and less chance of missing out detection.Thus arises the problem of template spacing which is solved by fixing the match between the neighbouring templates to be a predetermined value.

Actions (login required)

View Item