Sökning: "Gamma-ray burst"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden Gamma-ray burst.

  1. 1. Single-peaked gamma-ray bursts in the Fermi GBM catalogue

    Master-uppsats, KTH/Fysik

    Författare :Henric Hintze; [2022]
    Nyckelord :astroparticle physics; GBR; gamma-ray burst; single-peaked; single peaked; shock breakout; Fermi; GBM; gamma-ray burst monitor; light curve; low-luminosity; low luminosity; closure relation; astropartikelfysik; GBR; gammablixt; singelpeakad; shockbreakout; Fermi; GBM; gammablixtmonitor; ljuskurva; ljuskurvor; lågluminositets;

    Sammanfattning : Gamma-ray burst light curves are notoriously irregular, yet a significant number consists of a single fast-rising, exponentially decaying pulse. These are called single-peaked light curves. LÄS MER

  3. 2. Prompt emission in Gamma-ray bursts; Photospheric Radiation from Synchrotron-Like spectra

    Kandidat-uppsats, KTH/Fysik

    Författare :Erik Vitols; [2022]
    Nyckelord :Gamma-ray burst; radiation mechanisms: thermal and non-thermal;

    Sammanfattning : Gamma-ray bursts (GRBs) are the most luminous phenomena in the Universe, explosions whoseenergy is generated by supernovae or mergers of dense objects such as neutron stars. The GRBemission is divided into the prompt emission phase characterized by γ-ray radiation and the afterglowof lower energy radiation. LÄS MER

  4. 3. Measuring the [C II]-to-H I connection in high-redshift absorption-selected galaxies

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Gaurav Senthil Kumar; [2022]
    Nyckelord :QSO; Quasar; Black Hole; AGN; Active Galactic Nuclei; DLA; Damped Lyman Alpha; C II; [C II]; H I; Sightline; HST; X-shooter; Spectroscopy; Echelle Spectroscope; Hyperfine transition; Hyperfine; Physics and Astronomy;

    Sammanfattning : HI neutral gas is the basic building block of galaxies. It dictates the star formation rate and hence the metal enrichment rates within high redshift galaxies. HI neutral gas cannot be directly observed beyond z ≈ 0. LÄS MER

  5. 4. High-Redshift Gamma-ray Bursts as seen by SVOM/ECLAIRs

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Miguel Llamas Lanza; [2021]
    Nyckelord :Gamma-ray Bursts; GRBs; compact objects; high energy; ECLAIRs; SVOM; high redshift; T90; detection biases;

    Sammanfattning : Gamma Ray Burst (GRB) are very bright cosmological explosions signalling the catastrophic formation of a black hole. Therefore, they act like real light beacons that could be detected through-out the Universe and be used as probes to study the contents and phases of the early Universe. However, only a handful sample is known so far. LÄS MER

  7. 5. Study of the in-flight calibration of theSVOM/ECLAIRs instrument

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Jakob Östberg; [2020]
    Nyckelord :Telescope; calibration; gamma-ray; burst; ECLAIRs; SVOM; IRAP;

    Sammanfattning : The Space based multi-band Variable astronomical Object Monitor (SVOM) is a x- andgamma-ray telescope with the primary objective of observing gamma-ray bursts. Themission is a cooperation between the French and Chinese space agencies and will be launchedin 2021. LÄS MER