Timing of millisecond and binary pulsars and search for the low‐frequency gravitational waves

Abstract

Search for the gravitational wave background (GWB) became one of the most intriguing problem of the modern astrophysic. As the most stable natural standards of astronomical time millisecond and binary pulsars give us an unique opportunity to detect the low‐frequency GWB. The method of search for the GWB using pulsars is based on the analysis of the long (a few years) pulsar timing series. Results of such analysis may be essentially affected by the standard procedure of the fitting of pulsar timing parameters, that bias the estimations of an upper limit of GWB and the significance of the possible gravitational waves detection. In this paper the influence of the pulsar parameters’ fitting procedure on the search for GWB with Pulsar Timing Arrays is analyzed.