Title :
Application of discrete-time signal processing in astronomical researches
Author :
Li, Xiaopan ; Luo, Yuhui ; Zhang, Li ; Wu, Wenliang ; Shan, Yuqiong ; Wang, Lisha
Author_Institution :
Dept. of Phys., Zhaotong Teachers´´ Coll., Zhaotong, China
Abstract :
With discrete-time signal processing, we study the flux variability period of Quasar Mkn 421 at the radio band 22 and 37 GHz, and Quasar PKS 1510-089 at the X-ray band 1.5-12 keV. The Discrete Correlation Functions (DCFs) of these bands are discussed. It is found that the flux curve variability of Mkn 421 is (3.78±0.21)a at 22 GHz, (3.99±0.16)a at 37GHz; and PKS 1510-089 is (1.03±0.11)a in X-ray band. The results of application of discrete-time signal processing are excellently in agreement with that of other methods applied by other researchers.
Keywords :
quasars; signal processing; Mkn 421; Mrk 421; PKS 1510-089; X-ray band; astronomical researches; discrete correlation functions; discrete-time signal processing; electron volt energy 1.5 keV to 12 keV; flux curve variability; flux variability period; frequency 22 GHz to 37 GHz; quasar; radio band; Adaptive optics; Correlation; Delay effects; Interpolation; Monitoring; Signal processing; X-ray imaging; discrete correlation function method; disctete-time signal processing; periodcity;
Conference_Titel :
Transportation, Mechanical, and Electrical Engineering (TMEE), 2011 International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4577-1700-0
DOI :
10.1109/TMEE.2011.6199718
