Optimising the time series analysis methods for changeable astrophysic sources: AE Aquarii
نویسندگان
چکیده
منابع مشابه
a time-series analysis of the demand for life insurance in iran
با توجه به تجزیه و تحلیل داده ها ما دریافتیم که سطح درامد و تعداد نمایندگیها باتقاضای بیمه عمر رابطه مستقیم دارند و نرخ بهره و بار تکفل با تقاضای بیمه عمر رابطه عکس دارند
Fireball Models for Flares in AE Aquarii
We examine the flaring behaviour of the cataclysmic variable AE Aqr in the context of the ‘magnetic propeller’ model for this system. The flares are thought to arise from collisions between high density regions in the material expelled from the system after interaction with the rapidly rotating magnetosphere of the white dwarf. We calculate the first quantitative models for the flaring and calc...
متن کاملA search for TeV emission from AE Aquarii
We have observed the cataclysmic variable AE Aqr for a total of 68.7 hours over the epoch 1991-95 using the Whipple Observatory 10 m gamma-ray telescope. An analysis of these data has revealed no evidence for any steady, pulsed or episodic TeV emission. We have calculated an upper limit for steady emission of 4.0 x lo-‘* photons cm-‘s-l at an energy threshold of 900 GeV. This is three orders of...
متن کاملA Search for VHE Emission from AE Aquarii
The DQ Her type cataclysmic variable AE Aquarii was observed with the rst Cerenkov imaging telescope of the projected HEGRA ve telescope array in August and September 1994. A naive analysis using the false source method yielded no evidence of an un-pulsed VHE -ray ux or of large scale are activity. The results of a test for periodicity in the 34 s to 16 s region will be available in due course.
متن کاملSome New Methods for Prediction of Time Series by Wavelets
Extended Abstract. Forecasting is one of the most important purposes of time series analysis. For many years, classical methods were used for this aim. But these methods do not give good performance results for real time series due to non-linearity and non-stationarity of these data sets. On one hand, most of real world time series data display a time-varying second order structure. On th...
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ژورنال
عنوان ژورنال: Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie
سال: 2014
ISSN: 2222-4173,0254-3486
DOI: 10.4102/satnt.v33i1.934