The multifrequency monitoring of microquasars. SS433

TL;DR

This study presents a comprehensive 17-year radio monitoring of the microquasar SS433, revealing stable spectral properties and providing extensive flux density data across multiple frequencies.

Contribution

It offers the longest continuous radio observation dataset of SS433, demonstrating consistent spectral indices and making data publicly accessible.

Findings

Radio spectra fit a power law with a stable spectral index of -0.60

Over 940 observations and 4500 flux measurements were collected

Spectral index determination accuracy exceeded previous methods

Abstract

The principal results of daily observations with the RATAN-600 radio telescope of X-ray binary with relativistic jets microquasar SS433 in 1986--2003 are presented. We have measured the flux densities at 0.96, 2.3, 3.9, 7.7, 11.2 and 21.7 GHz in different sets, duration from a week to some months. In general there are 940 observations of SS433 and more than 4500 flux density measurements in the period. Observations show that radio spectra are well fitting by a power law. The mean spectral index remained the same, $-0.60\pm0.14$ during almost 20 years at least, and mean accuracy of the index determination was better than 0.1 in our multi-frequency observations, i.e. it was higher than in the intensive two-frequency monitoring of SS433 with the three-element GBI interferometer. Flux density data and spectra `on-line' plotting are accessible on the CATS data base site: http://cats.sao.ru/.