Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Fermi-LAT"”.
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Search for evidence of cosmic ray acceleration by supernova Remnant Kes 41 using the Fermi LAT
… events received during the full run time of the Fermi Gamma Space Telescope (FGST) Large Area Telescope (LAT) to date. By studying the [gamma]y emission of the supernova remnant (SNR) Kes 41 for the energy range ~ 200MeV-200GeV, the [gamma]-ray morphology and spectrum were measured. These …
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Search for gamma-ray emission from bow shocks of runaway stars
… that particles are accelerated to ultrarelativistic energies in the shocks of these objects. The environments of supernova remnants are complex and challenge detailed modelling of the processes leading to high-energy gamma-ray emission. The study of shock acceleration at bow shocks, …
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Spectral Variability Analysis of BL Lacertae
… wavelengths using the method of Discrete Correlation Function analysis. Quasi-simultaneous measurements in the UBVRI bands have been performed using the 1.3 m optical telescope at MDM observatory at Kitt-Peak, AZ. A flare is observed during May 2011 in optical data that is also seen in the same …
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Dark matter searches with cosmic-ray detectors and the Square Kilometre Array
… Under the possibility of dark matter annihilating into particles of the Standard Model of Particle Physics, we study the products of annihilation with cosmic-ray detectors, such as AMS, Fermi-LAT and PAMELA, and radio telescopes, such as the SKA. In this work, we focus on the positron …
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Pulsar wind nebulae at high energies
… parts of their rotational energy into winds of relativistic particles. This thesis presents an in-depth study of the detected population of PWNe at high energies. To outline general trends regarding their evolutionary behaviour, a time-dependent model is introduced and compared to the available …
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Stacking the Gamma-ray Sky to Search for Faint Astrophysical Populations
… the 13th year of its orbit around Earth, the Fermi Space Gamma-ray Telescope has been continually surveying the γ-ray sky with its Large Area Telescope (LAT) on board. The latest Fermi source catalog contains over 6000 sources. Yet, a lot of sources that are expected to emit γ-rays are not …
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The X-ray and gamma-ray sky - Temporal, spectral and triangulation techniques for the characterization and localization of sources in High Energy Astrophysics
… shows features, such as Quasi-Periodic Oscillations, at around 2 Hz, compatible with a Black Hole Transient in a hard state. Accreting Millisecond X-ray Pulsars (AMXPs) are a subclass of NS LMXBs in which the NS shows X-ray pulsations at periods shorter than 10 milliseconds. In these systems, …
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SEARCH FOR GAMMA-RAY COUNTERPARTS OF GRAVITATIONAL WAVE EVENTS AND OTHER TRANSIENT SIGNALS WITH HAWC
… it well suited to look for transient events correlated with other astronomical messengers. In this work we present a maximum likelihood analysis framework developed to search and analyze signals in HAWC data of arbitrary timescales. We apply this method to search for very-high-energy gamma-ray …
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Search for Gamma-ray Spectral Lines with the Fermi Large Area Telescope and Dark Matter Implications
… would be detected by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope (Fermi). If WIMPs annihilate directly into gamma rays, the gamma-ray energy would be the same as the rest mass energy of the WIMPs, which is currently unknown. This process would cause a "pile-up" of …
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Gamma-ray studies of the young shell-type SNR RX J1713.7-3946
… current discussions in Astrophysics relates to the origin of high-energy cosmic rays. According to our current knowledge, the abundance distribution of the elements in cosmic rays at their point of origin indicates, within plausible error limits, that they were initially formed by …
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Clestial harmonics - Applications of Angular Power Spectra to Problems in Astroparticle and Cosmological Physics
… dealt with in terms of a statistical cross-correlation formalism between the 2MRS galaxy clustering spectroscopic sample and the unresolved gamma-ray background (UGRB), which was modelled including observational features based on the Fermi-LAT satellite measured performances. The nature of the …