NuSTAR observation of X-ray pulsar 1E 1145.1-6141

Abstract

In this paper, we report on the hard X-ray observation of the X-ray pulsar 1E 1145.1-6141 performed with the Nuclear Spectroscopic Telescope Array mission (NuSTAR). The coherent pulsation of the source with a period of $\sim 296.653\pm 0.021s$ is detected. The source may be in the equilibrium phase, according to the most recent measurements of its pulse period. The pulse profile reveals a mild energy dependence and generally hints at a pencil-beam pattern. The pulse profile have evolved with time. The Pulse fraction is found to depend on energy with a fall in the value at $\sim 32keV$. The NuSTAR spectra can be approximated by a composite model with two continuum components, a blackbody emission, cut-off powerlaw, and a discrete component in the form of gaussian to account for the emission line of iron. The estimated absorbed flux of the source is $\sim 6\times 10^{-10}ergc{m}^{-2}{s}^{-1}$ which corresponds to a luminosity of $\sim 5\times 10^{36}erg{s}^{-1}$. Pulse phase-resolved spectroscopy were performed to understand the evolution of spectral parameters with pulse phase. The estimated blackbody radius is found to be consistent with the size of the theoretical prediction.

7 pages, 4 figures

References in corpus (4)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• 4U 0115+63 from RXTE and INTEGRAL Data: Pulse Profile and Cyclotron Line Energy
• NuSTAR observations of the supergiant X-ray pulsar IGR J18027-2016: accretion from the stellar wind and possible cyclotron absorption line
• Discovery of a pulse-phase-transient cyclotron line in the X-ray pulsar Swift J1808.4-1754 and identification of an optical companion

Cited by in corpus (2)

• Energy-resolved pulse profiles of accreting pulsars: Diagnostic tools for spectral features
• Catalog of the Galactic population of X-ray pulsars in High-mass X-ray binary systems