1. Chasing Gravitational Waves with the Cherenkov Telescope ArrayJ. G. Green, Saptashwa Bhattacharyya, Judit Pérez-Romero, Samo Stanič, Veronika VODEB, Serguei Vorobiov, Danilo Zavrtanik, Marko Zavrtanik, Miha Živec, 2023, objavljeni znanstveni prispevek na konferenci Opis: The detection of gravitational waves (GWs) from a binary neutron star (BNS) merger by Advanced
LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts
of this GW event, ushered in a new era of multimessenger astronomy, providing the first
direct evidence that BNS mergers are progenitors of short gamma-ray bursts (GRBs). Such events
may also produce very-high-energy (VHE, > 100 GeV) photons which have yet to be detected
in coincidence with a GW signal. The Cherenkov Telescope Array (CTA) is a next-generation
VHE observatory which aims to be indispensable in this search, with an unparalleled sensitivity
and ability to slew anywhere on the sky within a few tens of seconds. Achieving such a feat
will require a comprehensive real-time strategy capable of coordinating searches over potentially
very large regions of the sky. This work will evaluate and provide estimations on the number of
GW-CTA events determined from simulated BNS systems and short GRBs, considering both on and
off-axis emission. In addition, we will present and discuss the prospects of potential follow-up
strategies with CTA.
Ključne besede: gravitational waves (GWs), binary neutron star (BNS) merger, short gamma-ray bursts (GRBs), Advanced LIGO and Advanced Virgo, GW electromagnetic counterparts, multimessenger astrophysics, very-high-energy gamma-rays, Cherenkov Telescope Array
Objavljeno v RUNG: 15.09.2023; Ogledov: 328; Prenosov: 4
 Celotno besedilo (1,66 MB)
Gradivo ima več datotek! Več... |
2. Ultrahigh-energy neutrino follow-up of gravitational wave events GW150914 and GW151226 with the Pierre Auger ObservatoryAlexander Aab, Andrej Filipčič, Gašper Kukec Mezek, Ahmed Saleh, Samo Stanič, Marta Trini, Serguei Vorobiov, Lili Yang, Danilo Zavrtanik, Marko Zavrtanik, 2016, izvirni znanstveni članek Ključne besede: Visokoenergijski nevtrini, gravitacijski valovi, črne luknje, binarni sistemi, LIGO, Observatorij Pierre Auger
Objavljeno v RUNG: 13.01.2017; Ogledov: 4020; Prenosov: 295
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3. Detection of gravitational waves : Diploma thesisGregor Mrak, 2016, diplomsko delo Opis: This report mainly focuses on the first two detections of gravitational waves
(GW). At the beginning of the thesis the historical background of GW explorations
is discussed by pointing out some arguments and researchers
that were essential for the progress. Continuing with the derivation based
on the theory of general relativity, in order to express where certain properties
derive. In the main part of the report, the subject of interest becomes
Laser interferometer gravitational-wave observatory (LIGO), beginning
with the problems occurring on the way to detection, describing different
noise sources one by one. After pointing out the problems, solutions
are discussed, namely the technological advances made to lower the background
noise as much as possible. The chapter (4) points out different parts
of the detector which are implemented to produce a clearer signal. As only
physical noise reduction methods are not enough, digital signal processing
algorithms are mentioned as well which are used to analyze the data. Subsequently
the required theoretical knowledge is given, so the main part ends
with the analysis of actual data taken from LIGO’s public release for both
GW150914 and GW151226 events (first and second official detections). In
the conclusion of the report a brief descriptions of various detectors besides
Ligo are given and some insight of the future detectors that are planned to
be built.
Ključne besede: Gravitational waves, Ligo, Binary black hole merger, gravitational
wave interferometry
Objavljeno v RUNG: 27.09.2016; Ogledov: 6623; Prenosov: 311
Celotno besedilo (3,27 MB) |
