1 Introduction

2 Effect of the observer velocity on the perturbed galaxy number counts  
2.1 Boosted galaxy number counts  
2.2 Spherical harmonic coefficients  

3 Impact on observable statistics  
3.1 Cosmic dipole  
3.2 Correlation between multipoles  

4 Estimators for β and \(F_{\mathrm{kin}}\)  
4.1 Single tracer case  
4.2 Simple examples for the estimator and the signal  
4.3 Generalisation to multi-tracer or multiple redshift bins  

5 Forecast for future surveys  
5.1 Individual redshift bins  
5.2 Combining 10 redshift bins  
5.3 Adding priors on \(F_{\mathrm{kin}}\)  
5.4 Adding priors on the magnification bias and evolution bias  

6 Discussion and conclusions