<i>NuSTAR</i> observation of X-ray pulsar 1E 1145.1−6141

In this paper, we report on the hard X-ray observation of pulsar 1E 1145.1-6141 performed with Nuclear Spectroscopic Telescope Array mission (NuSTAR). The coherent pulsation source a period $\sim296.653\;\pm\;0.021\;s $ is detected. may be in equilibrium phase, according to most recent measurements its pulse period. profile reveals mild energy dependence and generally hints at pencil-beam pattern. have evolved time. Pulse fraction found depend fall value $\sim 32\; keV$. NuSTAR spectra can approximated by composite model two continuum components, blackbody emission, cut-off powerlaw, discrete component form gaussian account for emission line iron. estimated absorbed flux $\sim6\times10^{-10}\;erg\;cm^{-2}\;s^{-1}$ which corresponds luminosity $\sim5\times 10^{36}\;erg\;s^{-1}$. phase-resolved spectroscopy were understand evolution spectral parameters phase. radius consistent size theoretical prediction.