Essays about: "quiet period"

Showing result 1 - 5 of 11 essays containing the words quiet period.

  1. 1. A study of the gamma-ray emission from the blazar S50716+71 using the Fermi-LAT telescope

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Fredrik Vislander; [2022]
    Keywords : AGN; active galactic nuclei; Fermi-LAT; astrophysics; gamma-rays; synchrotron self-Compton; SSC; S50716 71.;

    Abstract : This thesis sums up a bachelor project in which gamma-ray emission from an extra-galactic source (S50716+71) is studied using data collected by the Fermi Large Area Telescope (LAT). The emission consists of 12,5 years of data (April 2008 to February 2020) in the energy range 100 MeV - 300 GeV. READ MORE

  3. 2. Effects of weaning and two separation strategies on cow-calf pairs kept together in an automatic milking system until calves were four months old

    University essay from SLU/Dept. of Animal Nutrition and Management

    Author : Kajsa Bruhn; [2021]
    Keywords : cow; calf; separation; weaning; vocalization; activity; stress;

    Abstract : In the commercial dairy industry calves and cows are usually separated within 24 hours, however there is an increasing interest from the consumers to accommodate dairy cows and their calves together to improve animal welfare. Previous studies conclude that with later separation comes an increase in both calves and cows’ behavioral stress response after separation, however late separation has positive effects on the health and behavior of calves and cows. READ MORE

  4. 3. Automatic Characterisation of Magnetic Indices with Artificial Intelligence

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Veronika Haberle; [2020]
    Keywords : artificial intelligence; magnetic indices; magnetically quiet periods; geomagnetic field;

    Abstract : The complex interactions between the Sun and Earth are referred to as Space Weather. Key parameters include magnetic indices which quantitatively describe geomagnetic activity by determining a baseline that removes the background magnetic field and allows quantification of the remaining activity during geomagnetic events. READ MORE

  5. 4. High Energy gamma-ray behavior of a potential astrophysical neutrino source : The case of TXS 0506+056

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Nora Valtonen-Mattila; [2019]
    Keywords : Blazars; Active Galactic Nuclei; TXS 0506 056; Gamma rays; AGN; astrophysical neutrino; IceCube neutrino; astrophysical jets;

    Abstract : Blazars are a type of Active Galaxy that emit strong astrophysical jets. The association of a HE gamma-ray flare from the blazar TXS 0506+056 to the IceCube-170922A neutrino event in 2017, opened the possibility to a link between these two events. READ MORE

  6. 5. Analysis of the Hard Spectrum BL Lac Source 1H 1914-194 with Fermi-LAT Data and Multiwavelength Modelling

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Dominic Gächter Sundbäck; [2018]
    Keywords : ;

    Abstract : The very-high-energy gamma-ray emission of the hard spectrum BL Lac source 1H1914-194 has been studied with Fermi-LAT data covering a nearly ten-year period between August 2008 until March 2018 in the energy range of 300 MeV to 870 GeV. The mean flux has been determined as 8.4 x 10-9±3.5 x 10-10 photon cm-2 s-1. READ MORE