2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/98075This paper discusses spectral sensitivity of solitary and binary pulsars to a low-frequency (colored) noise. It is a third paper in a series of papers devoted to analysis of the low-frequency noise in pulsar timing observations and its impact on observable fitting parameters of timing model.25 pages, 3 figures, accepted to MNRASAstrophysicsGeneral Relativity and Quantum CosmologyData Analysis, Statistics and ProbabilityMillisecond and Binary Pulsars as Nature's Frequency Standards. III. Fourier Analysis and Spectral Sensitivity of Timing Observations to Low-Frequency Noisetext