Phase-resolved spectrum of the Crab pulsar from NICER

Context{The high energy emission regions of rotation powered pulsars are studied using folded light curve (FLCs) and phase resolved spectra (PRS).} aims{This work uses the NICER observatory to obtain highest resolution FLC PRS Crab pulsar at soft X-ray energies.} methods{NICER has accumulated about 347 ksec data on pulsar. The processed standard analysis pipeline. Stringent filtering is done for spectral analysis. individual detectors calibrated in terms long time (LTLC), raw spectrum deadtime. arrival times photons referred solar system's barycenter frequency $\nu$ its derivative $\dot \nu$ used derive each photon.} results{The LTLCs, deadtimes statistically similar; latter two show no evolution with epoch; detector deadtime independent photon energy. pulsar, taking into account types deadtime, only approx 7% 8% larger than that obtained cleaned events. Detector 00 behaves slightly differently from rest, but can be work. peaks a better 1/512 phase. very close first peak rises slowly falls faster. index almost constant peak.} conclusions{The {{peaks}} provide important constraints formation caustics zone.}