21. Evidence of Intermediate-scale Energy Spectrum Anisotropy of Cosmic Rays E ≥ 10^19.2 eV with the Telescope Array Surface DetectorR.U. Abbasi, Jon Paul Lundquist, 2018, izvirni znanstveni članek Opis: Evidence for an intermediate-scale energy spectrum anisotropy has been found in the arrival directions of ultra-high energy cosmic rays for energies greater than 10^19.2 eV in the northern hemisphere using 7 years of Telescope Array surface detector data. A relative energy distribution test is done comparing events inside oversampled spherical caps of equal exposure, to those outside, using the Poisson likelihood ratio. The center of maximum significance is at 9h16m, 45°, and has a deficit of events with energies 10^19.2 ≤ E < 10^19.75 eV and an excess for E ≥ 10^19.75 eV. The post-trial probability of this energy anisotropy, appearing by chance anywhere on an isotropic sky, is found by Monte Carlo simulation to be 9 × 10−5 (3.74σ global).
Ključne besede: astroparticle physics, cosmic rays, anisotropy, large-scale structure of universe
Objavljeno v RUNG: 24.04.2020; Ogledov: 4376; Prenosov: 204
 Celotno besedilo (1,43 MB) |
22. Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array ExperimentR.U. Abbasi, Jon Paul Lundquist, 2014, izvirni znanstveni članek Opis: We have searched for intermediate-scale anisotropy in the arrival directions of ultrahigh-energy cosmic rays with energies above 57 EeV in the northern sky using data collected over a 5 year period by the surface detector of the Telescope Array experiment. We report on a cluster of events that we call the hotspot, found by oversampling using 20∘-radius circles. The hotspot has a Li-Ma statistical significance of 5.1σ, and is centered at R.A.=146.7∘, Dec.=43.2∘. The position of the hotspot is about 19∘ off of the supergalactic plane. The probability of a cluster of events of 5.1σ significance, appearing by chance in an isotropic cosmic-ray sky, is estimated to be 3.7×10−4 (3.4σ).
Ključne besede: acceleration of particles, cosmic rays, large-scale structure of universe, surveys
Objavljeno v RUNG: 24.04.2020; Ogledov: 4457; Prenosov: 0
Gradivo ima več datotek! Več... |
23. Test results of a prototype device to calibrate the Large Size Telescope camera proposed for the Cherenkov Telescope ArrayM. Palatiello, Christopher Eckner, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, 2017, objavljeni znanstveni prispevek na konferenci Ključne besede: Large Size Telescope camera, CTA, photon density
Objavljeno v RUNG: 16.02.2018; Ogledov: 4102; Prenosov: 137
Celotno besedilo (4,39 MB) |
24. A Trigger Interface Board to manage trigger and timing signals in CTA Large-Sized Telescope and Medium-Sized Telescope cameraPablo Peñil, Christopher Eckner, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, 2017, objavljeni znanstveni prispevek na konferenci Ključne besede: Large-Sized Telescope, Medium-Sized Telescope, CTA
Objavljeno v RUNG: 16.02.2018; Ogledov: 3894; Prenosov: 142
Celotno besedilo (960,95 KB) |
25. Simulations of Tidal Disruption Events Observations with the LSSTKatja Bricman, 2017, magistrsko delo Opis: The Large Synoptic Survey Telescope (LSST) will produce a multi-colour survey of 25000 square deg of the Southern sky during its 10 years of operations. It will observe over 20 billion galaxies and a similar number of stars, map the Solar System and the Milky Way, and probe dark matter and dark energy. In addition, it will discover thousands of transients every night, including new classes of objects, which have not yet been observed. Due to its large coverage of the sky it will be a perfect tool for the search of rare Tidal Disruption Events (TDEs), which occur when a star passes close by a supermassive black hole and gets disrupted by its tidal force. Afterwards the stellar debris fall back to the black hole, initially at a rate exceeding
the Eddington rate, producing an outflow, which releases a flare of energy. When the fallback rate subsides below the Eddington rate, the gas accretes onto the black hole via accretion disk. The LSST simulation framework enables us to simulate observations of different types of objects with the LSST. In this work, we include TDEs in the LSST simulation framework, estimate the number of detected TDEs, and simulate their light curves using a theoretical model, which predicts a t^(-2.6) light curve decline with time in the outflow phase and a t^{-0.4} decline in the disk phase. We also take a closer look at the distribution of the detected TDEs over cosmological redshift and black hole mass.
Ključne besede: Astronomical observations, Large Synoptic Survey Telescope, Tidal Disruption Events, Black Holes, simulations
Objavljeno v RUNG: 17.10.2017; Ogledov: 5653; Prenosov: 0
Gradivo ima več datotek! Več... |
26. Design of a prototype device to calibrate the Large Size Telescope camera of the Cherenkov Telescope ArrayM. Iori, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, 2015, objavljeni znanstveni prispevek na konferenci Ključne besede: Cherenkov Telescope Array (CTA), large-size telescope (LST) design for CTA, LST camera calibration
Objavljeno v RUNG: 26.01.2017; Ogledov: 5052; Prenosov: 217
Celotno besedilo (341,27 KB) |
27. Development of the photomultiplier tube readout system for the first Large-Sized Telescope of the Cherenkov Telescope ArrayShu Masuda, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, 2015, objavljeni znanstveni prispevek na konferenci Ključne besede: Cherenkov Telescope Array (CTA), Large-Sized Telescope (LST), imaging camera, readout system
Objavljeno v RUNG: 24.03.2016; Ogledov: 6074; Prenosov: 368
Celotno besedilo (927,35 KB) |
28. Development of Slow Control Boards for the Large Size Telescopes of the Cherenkov Telescope ArrayDaniela Hadasch, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, objavljeni znanstveni prispevek na konferenci Ključne besede: Cherenkov Telescope Array (CTA), Large Size Telescopes (LST), imaging camera, slow control board (SCB)
Objavljeno v RUNG: 21.03.2016; Ogledov: 5732; Prenosov: 241
Celotno besedilo (4,05 MB) |
29. The Optical System for the Large Size Telescope of the Cherenkov Telescope ArrayM. Hayashida, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, objavljeni znanstveni prispevek na konferenci Ključne besede: Cherenkov Telescope Array (CTA), Large Size Telescopes (LST), optical system, active mirror control system
Objavljeno v RUNG: 21.03.2016; Ogledov: 5728; Prenosov: 270
Celotno besedilo (1,10 MB) |
30. Prototyping of Hexagonal Light Concentrators for the Large-Sized Telescopes of the Cherenkov Telescope ArrayAkira Okumura, Andrej Filipčič, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Gabrijela Zaharijas, Danilo Zavrtanik, Marko Zavrtanik, objavljeni znanstveni prispevek na konferenci Ključne besede: Cherenkov Telescope Array (CTA), Large-Sized Telescopes (LST), imaging camera, focal plane light concentrators
Objavljeno v RUNG: 21.03.2016; Ogledov: 5622; Prenosov: 212
Celotno besedilo (1,51 MB) |
