До процедури точного пошуку слабкої вузької лiнiї в рентгенiвському спектрi – роль систематики, спричиненої моделюванням континууму

• Main Authors: Savchenko, D. O., Iakubovskyi, D. A.
• Format: Article
• Language: English
• Published: Publishing house "Academperiodika" 2018
• Subjects: X-rays; general line; identification of the dark matter; -
• Online Access: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018662

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.