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We examine the accuracy of estimation of parameters of the gravitational-wavesignals from spinning neutron stars that can be achieved from observations byEarth-based laser interferometers. We consider a model of the signal consistingof two narrowband components and including both phase and amplitude modulation.We calculate approximate values of the rms errors of the parameter estimatorsusing the Fisher information matrix. We carry out extensive Monte Carlosimulations and obtain cumulative distribution functions of rms errors ofastrophysically interesting parameters: amplitude of the signal, wobble angle,position of the source in the sky, frequency, and spindown coefficients. Weconsider both all-sky searches and directed searches. We also examine thepossibility of determination of neutron star proper motion. We performsimulations for all laser-interferometric detectors that are currently underconstruction and for several possible lengths of the observation time and sizesof the parameter space. We find that observations of continuousgravitational-wave signals from neutron stars by laser-interferometricdetectors will provide a very accurate information about their astrophysicalproperties. We derive several simplified models of the signal that can be usedin the theoretical investigations of the data analysis schemes independently ofthe physical mechanisms generating the gravitational-wave signal.Comment: LaTeX, 34 pages, 15 figures, submitted to Phys. Rev.

Data analysis of gravitational-wave signals from spinning neutron stars. II. Accuracy of estimation of parameters