До процедури точного пошуку слабкої вузької лiнiї в рентгенiвському спектрi – роль систематики, спричиненої моделюванням континууму
Some of recent detections of a narrow emission line at ∼3.5 keV have been accompanied by subsequent non-detections in the same sources, raising discussion about the actual level of systematic errors. In this paper, we study the systematics caused by an imperfect knowledge of a continuum model. Our s...
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| Datum: | 2018 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Publishing house "Academperiodika"
2018
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| Online Zugang: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018662 |
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| Назва журналу: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| Zusammenfassung: | Some of recent detections of a narrow emission line at ∼3.5 keV have been accompanied by subsequent non-detections in the same sources, raising discussion about the actual level of systematic errors. In this paper, we study the systematics caused by an imperfect knowledge of a continuum model. Our simple theoretical estimate and detailed modeling of simulated spectra allow us to calculate the value of this “continuum-induced” systematics for the first time. We show that, for some objects such as the M31 central part or the Draco dwarf spheroidal galaxy, the obtained level of systematics within a well-defined continuum model allows one to fully reconcile the controversial results claimed previously by different groups of authors. To minimize the effect of “continuum-induced” systematics, we show that one should reasonably decrease the size of the spectral bin and increase the modeled energy range. |
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