lnu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Gamma-ray emission and Synchrotron Self-Compton modelling of the macrolensed Quasar PKS 1830-211
Linnaeus University, Faculty of Technology, Department of Physics and Electrical Engineering.
2020 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The objective of this thesis is to retrieve Light Curves, Spectral Models, Spectral Maps, and to geta Spectral Energy Distribution (SED) plot, for the source of PKS1830-211. Finally, also to do amodelling of the whole SED coming from the source with the JetSet software. Which will then becompared to a previous modelling done by A. A. Abdo. First, a light curve is taken over the wholeFermi duration period. The Light Curve is a statistical plot of the overall flux from the source overtime. It will set every photon in a defined energy interval as a datapoint in a defined time bin width. Alight curve will first be taken over the Fermi Duration Period, to get a view of potential flares comingfrom the source. Three periods are then chosen to get a loud, an intermediate, and a loud flaringperiod. Variability is checked on all of these including the longer fermi duration period. A spectralmodel will be fitted for all of these periods. It’s a mathematical formula to the shape of the source’sflux spectrum over energy. By doing this, the electron energy distribution can be understood. SpectralMaps will then give a plot of the number of contributing photons from the source, of a given period.It also shows how well the models are adjusted to other light sources in the field of view. To get thecollected data from relevant catalogs, together with Fermi data from this analysis. A Spectral EnergyDistribution is downloaded from [Sed builder. [Online]. Available: https://tools.ssdc.asi.it/SED/] provided by the Italian space agency. The modelling is done toget an idea of the physical parameters present in the AGN. Such as the physical scales and proportionsof the structure near the core. Data from the SED will be used in the modelling with the best suitedperiod for the Fermi-LAT range.

Place, publisher, year, edition, pages
2020. , p. 70
Keywords [en]
Gamma-ray
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:lnu:diva-107138OAI: oai:DiVA.org:lnu-107138DiVA, id: diva2:1597318
Subject / course
Physics
Educational program
Physics Programme, 180 credits
Supervisors
Examiners
Available from: 2021-09-27 Created: 2021-09-25 Last updated: 2021-09-27Bibliographically approved

Open Access in DiVA

fulltext(3173 kB)278 downloads
File information
File name FULLTEXT01.pdfFile size 3173 kBChecksum SHA-512
cf4372791ff76dcf1c6d05e78f52234b297a6ff9a602bfd90ee59fc7f14ce99d409adf2afe442c30c409e8c3b9ffc75176825036389d8767b5d146aed3990d37
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Ohlsson, Pierre
By organisation
Department of Physics and Electrical Engineering
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
Total: 278 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 515 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf