A bang and a flash in the hubbub and haze. GW170817 / GRB 170817A and noises limiting gravitational wave detectors
Description
Gamma-ray bursts and gravitational waves at audio frequencies have long been thought to have common astrophysical origins. This has been confirmed with the joint observation of GW170817 and GRB 170817A due to the merger of two neutron stars. This exceptional event has confirmed expectations, but also proved to be an extremely powerful and precise test of general relativity. It was at the origin of observation of afterglow emission at all electromagnetic wavelength with time evolution observed at the second, hours, days and months time scales. To make this and future observation possible, gravitational wave detector noise instrumental noise needs to be understood. There are many source, in particular I describe in more detail the noise of monolithic optical filter cavities, radio-frequency modulation sideband amplitude, radio-frequency digital demodulation, laser frequency and light back-scatter. The last one is often considered unpredictable, but with a detailed study it can be in fact precisely modeled and even used to calibrate gravitational wave detectors. (author)
Abstract (French)
Les sursauts gamma et les ondes gravitationnelles aux frequences audibles ont longtemps ete supposes avoir des sources astrophysique commune. Ceci a ete confirme avec l'observation simultanee de GW170817 et de GRB 170817A du a la coalescence de deux etoiles a neutrons. Cet evenement exceptionnel a confirme ces attentes, et a aussi etait une verification de precision de la relativite generale. Il a ete a l'origine d'observation de l'emission remanente a toutes les longueurs d'ondes electromagnetique avec une evolution temporelle observe sur l'echelle de la seconde, heure, journee et mois. Pour rendre cette observation et de future observations possible, le bruit instrumental des detecteurs d'ondes gravitationnelles doit etre compris. Les sources de bruit sont nombreuses, et je decrit en particulier plus en detail le bruit des cavite optique monolithique de filtrage, de l'amplitude des bandes laterales radio-frequence, de la demodulation digitale radio-frequence, du bruit en frequence du laser ainsi que le bruit de la lumiere retro-diffuse. Cette derniere est souvent considerer comme impredictible, mais avec une etude minutieuse celle-ci peut etre modelise precisement et meme utilise pour calibrer les detecteurs d'ondes gravitationnelles. (auteur)
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Additional details
Publishing Information
- Imprint Pagination
- 173 p.
- Report number
- FRNC-TH--15851
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 55073508
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ASTROPHYSICS; COSMIC GAMMA BURSTS; FREQUENCY MODULATION; GENERAL RELATIVITY THEORY; GRAVITATIONAL WAVE DETECTORS; GRAVITATIONAL WAVES; NEUTRON STARS; OPTICAL FILTERS; RADIOWAVE RADIATION
- Descriptors DEC
- COSMIC RADIATION; ELECTROMAGNETIC RADIATION; FIELD THEORIES; FILTERS; IONIZING RADIATIONS; MEASURING INSTRUMENTS; MODULATION; PHYSICS; PRIMARY COSMIC RADIATION; RADIATION DETECTORS; RADIATIONS; RELATIVITY THEORY; STARS
Optional Information
- Notes
- 42 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses