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1.
Search for Spectral Irregularities due to Photon-Axionlike-Particle Oscillations With the Fermi Large Area Telescope
Gabrijela Zaharijas, 2016, original scientific article

Found in: ključnih besedah
Keywords: dark matter, gammarays theory, gamma rays experiment
Published: 26.04.2016; Views: 2027; Downloads: 0
.pdf Fulltext (801,77 KB)

2.
Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
Gabrijela Zaharijas, 2016, original scientific article

Found in: ključnih besedah
Summary of found: ...gamma rays experiment, gamma rays theory, Galactic diffuse emission...
Keywords: gamma rays experiment, gamma rays theory, Galactic diffuse emission
Published: 26.04.2016; Views: 1638; Downloads: 0
.pdf Fulltext (4,59 MB)

3.
Dark Matter search with the Fermi Large Area Telescope
Gabrijela Zaharijas, unpublished invited conference lecture

Abstract: High energy gamma-rays are one of the most promising tools to constrain or reveal the nature of dark matter. During the almost eight years of the Fermi satellite mission, the data from its Large Area Telescope (LAT) were used to set constraints on the dark matter cross section to various particle channels which now cut well into the theoretically motivated region of the parameter space. In this talk I will describe methods used to search for evidence of dark matter with the LAT, and review the status of the searches. Special attention will be given to the latest indications of the origin of the unaccounted gamma-ray excess at few GeV in the Fermi-LAT data in the region around the Galactic Center, which steered lots of attention as it was shown to be consistent with putative signals of WIMP dark matter particles. Finally I will discuss projections of the expected sensitivities with continued LAT data taking.
Found in: ključnih besedah
Keywords: dark matter, Fermi LAT experiment
Published: 21.06.2016; Views: 1816; Downloads: 0
.pdf Fulltext (132,77 KB)

4.
Expectations in Responsive Space
Peter Purg, 2013, scientific or documentary film, sound or video publication

Abstract: These responses by the students and mentors were gathered at the "FOReCAST" (Responsive Art in Public Space) workshop at the Graz University of Technology, Institute of Contemporary Art, Graz (Austria) 2014, conducted within the ADRIART.net project. The guiding questions were: - "What do you expect from this workshop?" asked on the first day of the face2face stage (May 6) after a 3-week online collaboration phase; and - "What was the most important thing that happened to you at this workshop?" asked at the last day (May 16). Interviewed, shot and edited by pETER Purg, May 2014. Shot in HD with ActionPro SD20F minicam. This video is part of a large-scale collective methodology reflection of the teachers involved in several "mobilities" (workshops across the region) of the ADRIART project, "Advancing Digitally Renewed Interactions in Art Teaching". More about the workshop: adriart.net/mobility-2014-graz . Visit adriart.net and join facebook.com/adriart.net to stay tuned. "With the support of the Lifelong Learning, Erasmus, Programme of the European Union. These videos reflect the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein."
Found in: ključnih besedah
Keywords: ADRIART, student expectations, needs analysis, research, video, experiment
Published: 06.07.2016; Views: 1570; Downloads: 0

5.
Shaking Komiža Narratives
Lavoslava Benčič, Adam Whitehall, Peter Purg, Dorian Mataija, 2013, artistic work

Abstract: This video work documents "an inter-media and site-specific percussive opinion on the Mapping Komiža Narratives ( adriart.net/mapping-komi-narratives ) show/exhibition on 12.9.2013 at the Reading room (Čitaona) of Komiža, island of Vis, Croatia, by pETER Purg, together with Lavoslava Benćić (mobile phone; digi-theremin) and Dorian Mataija (shakers, keyboard/sampler)." The video was shot by Adam Whitehall (also credited for the Spieldose-background-theme-WeAreTheChampions), the piece was collectively evolved, coordinated by pETER Purg. "With the support of the Lifelong Learning, Erasmus, Programme of the European Union. These videos reflect the views only of the authors, and the Commission cannot be held responsible for any use which may be made of the information contained therein."
Found in: ključnih besedah
Summary of found: ...video, experiment, percussion, narrative, intermedia, sound...
Keywords: video, experiment, percussion, narrative, intermedia, sound
Published: 06.07.2016; Views: 1720; Downloads: 0

6.
Search for Physics beyond the Standard Model with the CRESST Experiment
2017, master's thesis

Abstract: In spite of the successes of observational astro- and particle physics and cosmology very much of the universe remains unknown. The Standard Model of particle physics is a theory describing the electromagnetic, weak, and strong nuclear interactions, as well as classifying all the subatomic particles known. But there is overwhelming evidence, that all the known particles, the ordinary (baryonic) matter, the building blocks of planets, stars and ourselves, only make up about 4.9% of the energy content of the universe. The standard model of cosmology (CDM) indicates that the total mass-energy of the universe contains beside the 4.9% ordinary matter two other components: 26.8% dark matter and 68.3% dark energy. The accelerating expansion of the Universe is the result of the effect of the dark energy with its most simple form given by a cosmological constant in Einstein's Equation. Dark matter is an unidentified type of matter that is not accounted for by dark energy and neutrinos and is generally believed to be a non-relativistic, charge neutral and non-baryonic new form of matter. Although dark matter has not been directly observed yet, its existence and properties are inferred from its gravitational effects such as the motions of visible matter, gravitational lensing, its influence on the universe's large-scale structure, and its effects in the cosmic microwave background. Thus the search for Dark Matter is the search for physics beyond the standard model. Although the nature of dark matter is yet unknown, its presence is crucial to understanding the future of the universe. The CRESST experiment is searching for direct evidence in the form of a nuclear recoil induced on a scintillating CaWO4 crystal by a dark matter particle, and is installed and taking data underground at Laboratory Nazionali del Gran Sasso (LNGS) in Italy. While both, dark energy and dark matter, have not been detected directly, a class of dark matter particles that interact only via gravity and the weak force, referred to asWeakly Interacting Massive Particles (WIMPs), has been established as the leading candidate among the dark matter community. For this thesis a special model of dark matter was studied, namely the dark photon. This thesis provides a detailed description of the calculation of the 90% upper limit on the dark photon kinetic mixing based on data from the second phase of the CRESST experiment. The analysis was carried out in a frequentist approach based on the (unbinned) maximum-likelihood method and likelihood ratios. To make a statement about the calculated result and its quality, the used algorithm had to be tested, what was done with Monte Carlo simulations (pseudo data).
Found in: ključnih besedah
Keywords: astro physics, particle physics, cosmology, universe, Standard Model of particle physics, standard model of cosmology, matter, ordinary matter, dark matter, dark energy, accelerating expansion of the Universe, non-baryonic, new form of matter, gravitational lensing, cosmic microwave background, search for physics beyond the standard model, CRESST experiment, direct detection, CaWO4 crystal, underground laboratory, Laboratory Nazionali del Gran Sasso, Weakly Interacting Massive Particles, WIMP, dark photon, 90% upper limit, upper limit, kinetic mixing, frequentist approach, unbinned, maximum likelihood
Published: 13.10.2017; Views: 1206; Downloads: 0
.pdf Fulltext (10,71 MB)

7.
TA Anisotropy Summary
J. P. Lundquist, K. Kawata, 2019, published scientific conference contribution

Abstract: The Telescope Array (TA) is the largest ultra-high-energy cosmic-ray (UHECR) detector in the northern hemisphere. It consists of an array of 507 surface detectors (SD) covering a total 700 km^2 and three fluorescence detector stations overlooking the SD array. In this proceedings, we summarize recent results on the search for directional anisotropy of UHECRs using the latest dataset collected by the TA SD array. We obtained hints of the anisotropy of the UHECRs in the northern sky from the various analyses.
Found in: ključnih besedah
Summary of found: ...radiation, UHE detector, fluorescence detector, surface,Telescope Array Experiment, anisotropy, experimental results...
Keywords: cosmic radiation, UHE detector, fluorescence detector, surface, Telescope Array Experiment, anisotropy, experimental results
Published: 28.04.2020; Views: 119; Downloads: 6
.pdf Fulltext (1,88 MB)

8.
Constraints on the diffuse photon flux with energies above 10^18 eV using the surface detector of the Telescope Array experiment
J. P. Lundquist, R.U. Abbasi, 2018, original scientific article

Abstract: We present the results of the search for ultra-high-energy photons with nine years of data from the Telescope Array surface detector. A multivariate classifier is built upon 16 reconstructed parameters of the extensive air shower. These parameters are related to the curvature and the width of the shower front, the steepness of the lateral distribution function, and the timing parameters of the waveforms sensitive to the shower muon content. A total number of two photon candidates found in the search is fully compatible with the expected background. The 95% CL limits on the diffuse flux of the photons with energies greater than 10^18.0, 10^18.5, 10^19.0, 10^19.5 and 10^20.0 eV are set at the level of 0.067, 0.012, 0.0036, 0.0013, correspondingly.
Found in: ključnih besedah
Keywords: Ultra-high-energy photons, Telescope array experiment, Extensive air showers
Published: 30.04.2020; Views: 152; Downloads: 0
.pdf Fulltext (1,33 MB)

9.
The surface detector array of the Telescope Array experiment
J. P. Lundquist, T. Abu-Zayyad, 2012, original scientific article

Abstract: The Telescope Array (TA) experiment, located in the western desert of Utah, USA, is designed for the observation of extensive air showers from extremely high energy cosmic rays. The experiment has a surface detector array surrounded by three fluorescence detectors to enable simultaneous detection of shower particles at ground level and fluorescence photons along the shower track. The TA surface detectors and fluorescence detectors started full hybrid observation in March, 2008. In this article we describe the design and technical features of the TA surface detector.
Found in: ključnih besedah
Keywords: Ultra-high energy cosmic rays, Telescope Array experiment, Extensive air shower array
Published: 19.05.2020; Views: 63; Downloads: 0
.pdf Fulltext (1,81 MB)

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