FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W76470842> ?p ?o ?g. }

• W76470842 abstract "The signal quality of fibre-coupled spectrographs can be limited by the inherent properties of the optical fibre. This is especially the case for applications that require high signal-to-noise performance and high spectral resolution. Examples include metallicity and age of star clusters, as well as investigations of Lyman-alpha absorbers. Extra-solar planet research in particular encounters its limitations due to the non-repeatability of the fibre response. Initially, a limited signal quality due to fibres seems counter-intuitive, since one of the most remarkable advantages of fibres is their signal stabilizing property, called image scrambling, which refers to the effect that the fibre output signal is largely insensitive to variations at the input side. However, the fibre photometric and barycentre response is sub ject to external parameters like stress, seeing and guiding variations. State-of-the-art instrumentation has attained a level of sensitivity where these effects will impact upon instrument performance, especially when advancing to a regime of spectral resolving powers where the quantized character of the standard optical fibre can be resolved, which manifests itself in modal noise. Unprecedented effort will be required in order to accomplish high resolving powers in the spectral and spatial domains with 40 m class telescopes. It is therefore essential to predict these fibre-related measurement uncertainties so that the performance of current and future instruments can be optimized. This thesis starts out with a phenomenological description of the different effects that give rise to fibre-related noise and its influence on the observables relevant to astrophysics, such as barycentre and photometric stability. Special emphasis is given to the photometric uncertainties related to modal noise, where first a theoretical model is outlined which in later chapters will be sub ject to experimental investigations. Subsequently, the barycentre repeatability due to incomplete scrambling is the subject of detailed investigation. The remaining sources of noise are estimated using experimental data as well as simulations and put in contrast with the other effects. Alongside the quantitative prediction of instrument instabilities, mitigation strategies will be presented and discussed. I conclude with a brief discussion of the impact of incomplete scrambling and modal noise on current instrumentation, the implications for future instrument pro jects as well as future work that will help to further understand and obviate the underlying mechanisms." @default.
• W76470842 created "2016-06-24" @default.
• W76470842 creator A5010750121 @default.
• W76470842 date "2012-01-01" @default.
• W76470842 modified "2023-09-24" @default.
• W76470842 title "Measurement uncertainties in fibre-coupled spectrographs" @default.
• W76470842 hasPublicationYear "2012" @default.
• W76470842 type Work @default.
• W76470842 sameAs 76470842 @default.
• W76470842 citedByCount "0" @default.
• W76470842 crossrefType "dissertation" @default.
• W76470842 hasAuthorship W76470842A5010750121 @default.
• W76470842 hasConcept C11413529 @default.
• W76470842 hasConcept C115961682 @default.
• W76470842 hasConcept C120665830 @default.
• W76470842 hasConcept C121332964 @default.
• W76470842 hasConcept C127413603 @default.
• W76470842 hasConcept C154945302 @default.
• W76470842 hasConcept C182548165 @default.
• W76470842 hasConcept C199360897 @default.
• W76470842 hasConcept C21200559 @default.
• W76470842 hasConcept C24326235 @default.
• W76470842 hasConcept C2779843651 @default.
• W76470842 hasConcept C41008148 @default.
• W76470842 hasConcept C99498987 @default.
• W76470842 hasConceptScore W76470842C11413529 @default.
• W76470842 hasConceptScore W76470842C115961682 @default.
• W76470842 hasConceptScore W76470842C120665830 @default.
• W76470842 hasConceptScore W76470842C121332964 @default.
• W76470842 hasConceptScore W76470842C127413603 @default.
• W76470842 hasConceptScore W76470842C154945302 @default.
• W76470842 hasConceptScore W76470842C182548165 @default.
• W76470842 hasConceptScore W76470842C199360897 @default.
• W76470842 hasConceptScore W76470842C21200559 @default.
• W76470842 hasConceptScore W76470842C24326235 @default.
• W76470842 hasConceptScore W76470842C2779843651 @default.
• W76470842 hasConceptScore W76470842C41008148 @default.
• W76470842 hasConceptScore W76470842C99498987 @default.
• W76470842 hasLocation W764708421 @default.
• W76470842 hasOpenAccess W76470842 @default.
• W76470842 hasPrimaryLocation W764708421 @default.
• W76470842 hasRelatedWork W1511835136 @default.
• W76470842 hasRelatedWork W1970079055 @default.
• W76470842 hasRelatedWork W2010809308 @default.
• W76470842 hasRelatedWork W2046972952 @default.
• W76470842 hasRelatedWork W2267942446 @default.
• W76470842 hasRelatedWork W235844017 @default.
• W76470842 hasRelatedWork W2556642279 @default.
• W76470842 hasRelatedWork W2736525065 @default.
• W76470842 hasRelatedWork W2886639589 @default.
• W76470842 hasRelatedWork W2906289802 @default.
• W76470842 hasRelatedWork W3101192255 @default.
• W76470842 hasRelatedWork W3121498205 @default.
• W76470842 hasRelatedWork W3155892675 @default.
• W76470842 hasRelatedWork W1979294609 @default.
• W76470842 hasRelatedWork W2609535594 @default.
• W76470842 isParatext "false" @default.
• W76470842 isRetracted "false" @default.
• W76470842 magId "76470842" @default.
• W76470842 workType "dissertation" @default.