Matches in SemOpenAlex for { <https://semopenalex.org/work/W70442960> ?p ?o ?g. }
Showing items 1 to 77 of
77
with 100 items per page.
- W70442960 abstract "The High Energy Stereoscopic system, H.E.S.S. is an array of four imaging atmospheric Cherenkov telescopes, designed for the study of non-thermal phenomena in the universe at very high energies (VHE). The sensitivity of telescope systems such as H.E.S.S. can considerably be improved by a better discrimination of the vast number of hadronic cosmic-ray background events against the very rare gamma-ray signal events. In this work, an elaborated discrimination technique – the Boosted Decision Tree method – has been developed and its capabilities in terms of gamma/hadron separation and improved sensitivity are demonstrated. In the second part, the BDT method is applied to data obtained in observations of massive star forming environments, namely the colliding wind binary η Carinae, the massive stellar cluster Westerlund 1 and the Starburst galaxy NGC 253. An upper limit on the gamma-ray flux of the famous colliding wind binary system η Carinae is derived and, for the first time, an alternative model for the high-energy emission observed by the Fermi satellite is presented. The detection of very extended VHE gamma-ray emission from the vicinity of Westerlund 1 is reported and thorough spectral and morphological tests are presented. Large parts of the resolved emission can be explained in a hadronic scenario, however, a decisive conclusion can not be drawn. Finally, the BDT method allowed to detect the first Starburst galaxy, namely NGC253, in VHE gamma rays. Spectral and morphological results are presented and suggest that large parts of the CR energy content are convectively and diffusively transported into the intergalactic medium." @default.
- W70442960 created "2016-06-24" @default.
- W70442960 creator A5038038442 @default.
- W70442960 creator A5082748099 @default.
- W70442960 creator A5088213244 @default.
- W70442960 date "2010-05-21" @default.
- W70442960 modified "2023-09-24" @default.
- W70442960 title "Development of an advanced gamma/hadron separation technique and application to particular gamma-ray sources with H.E.S.S." @default.
- W70442960 doi "https://doi.org/10.11588/heidok.00010699" @default.
- W70442960 hasPublicationYear "2010" @default.
- W70442960 type Work @default.
- W70442960 sameAs 70442960 @default.
- W70442960 citedByCount "0" @default.
- W70442960 crossrefType "dissertation" @default.
- W70442960 hasAuthorship W70442960A5038038442 @default.
- W70442960 hasAuthorship W70442960A5082748099 @default.
- W70442960 hasAuthorship W70442960A5088213244 @default.
- W70442960 hasConcept C111309251 @default.
- W70442960 hasConcept C120665830 @default.
- W70442960 hasConcept C121332964 @default.
- W70442960 hasConcept C1276947 @default.
- W70442960 hasConcept C182107563 @default.
- W70442960 hasConcept C185544564 @default.
- W70442960 hasConcept C186769553 @default.
- W70442960 hasConcept C191897082 @default.
- W70442960 hasConcept C192562407 @default.
- W70442960 hasConcept C19694890 @default.
- W70442960 hasConcept C2780848835 @default.
- W70442960 hasConcept C44870925 @default.
- W70442960 hasConcept C68709404 @default.
- W70442960 hasConcept C72591435 @default.
- W70442960 hasConcept C7910260 @default.
- W70442960 hasConcept C94915269 @default.
- W70442960 hasConcept C98444146 @default.
- W70442960 hasConceptScore W70442960C111309251 @default.
- W70442960 hasConceptScore W70442960C120665830 @default.
- W70442960 hasConceptScore W70442960C121332964 @default.
- W70442960 hasConceptScore W70442960C1276947 @default.
- W70442960 hasConceptScore W70442960C182107563 @default.
- W70442960 hasConceptScore W70442960C185544564 @default.
- W70442960 hasConceptScore W70442960C186769553 @default.
- W70442960 hasConceptScore W70442960C191897082 @default.
- W70442960 hasConceptScore W70442960C192562407 @default.
- W70442960 hasConceptScore W70442960C19694890 @default.
- W70442960 hasConceptScore W70442960C2780848835 @default.
- W70442960 hasConceptScore W70442960C44870925 @default.
- W70442960 hasConceptScore W70442960C68709404 @default.
- W70442960 hasConceptScore W70442960C72591435 @default.
- W70442960 hasConceptScore W70442960C7910260 @default.
- W70442960 hasConceptScore W70442960C94915269 @default.
- W70442960 hasConceptScore W70442960C98444146 @default.
- W70442960 hasLocation W704429601 @default.
- W70442960 hasOpenAccess W70442960 @default.
- W70442960 hasPrimaryLocation W704429601 @default.
- W70442960 hasRelatedWork W1833408884 @default.
- W70442960 hasRelatedWork W1970340890 @default.
- W70442960 hasRelatedWork W1994575874 @default.
- W70442960 hasRelatedWork W2048522328 @default.
- W70442960 hasRelatedWork W2102099367 @default.
- W70442960 hasRelatedWork W2112494265 @default.
- W70442960 hasRelatedWork W2115262709 @default.
- W70442960 hasRelatedWork W2270687090 @default.
- W70442960 hasRelatedWork W2282072260 @default.
- W70442960 hasRelatedWork W2494653967 @default.
- W70442960 hasRelatedWork W2610721787 @default.
- W70442960 hasRelatedWork W2611621610 @default.
- W70442960 hasRelatedWork W2962821285 @default.
- W70442960 hasRelatedWork W3099995104 @default.
- W70442960 hasRelatedWork W3101768983 @default.
- W70442960 hasRelatedWork W3105106673 @default.
- W70442960 hasRelatedWork W3105294491 @default.
- W70442960 hasRelatedWork W3121700945 @default.
- W70442960 hasRelatedWork W3204374506 @default.
- W70442960 isParatext "false" @default.
- W70442960 isRetracted "false" @default.
- W70442960 magId "70442960" @default.
- W70442960 workType "dissertation" @default.