Study of the Accuracy of Reactor Antineutrino Spectrum Reconstruction

The paper presents the results of using the method of singular value decomposition of the response matrix to unfold model spectra of positrons in the DANSS experiment. An analysis of systematic uncertainties was carried out. A method for selecting the optimal regularization parameter is also proposed. The estimate of the bias caused by the introduction of the regularization term turned out to be at a level of 2–3%, which is comparable to the systematic error in the maximum of the spectrum.