supported by the National Natural Science Foundation of China (Grant Nos. 10821061,10763002,and 10663002);the National Basic Research Program of China (Grant No. 2009CB824800)
We analyze the radio light curve of 3C 273 at 15 GHz from 1963 to 2006 taken from the database of the literature,and find evidence of quasi-periodic activity.Using the wavelet analysis method to analyze these data,our...
Supported by the National Natural Science Foundation of China (Grant Nos. 10821061, 10763002, and 10663002);the National Basic Research Program of China (Grant No. 2007CB815103);the Natural Science Foundation of Yunnan Province (Grant No. 2008CC011)
A wavelet analysis method is introduced to study the possible periods of PKS 1510-089 in radio bands. By compiling the radio light curve of PKS 1510-089 at frequencies of 22 and 37 GHz from 1990 to 2005, and using the...