A review of X-ray spectral evolution in Crab pulsar
National Center for Radio Astrophysics, TIFR, Pune University Campus, PO Box 3, Ganeshkhind, Pune 411007, India
Corresponding author: firstname.lastname@example.org
Accepted: 17 June 2002
Pravdo et al. ([CITE]) claimed that the phase resolved x-ray spectrum in Crab pulsar (PSR B0531+21) shows a spectral hardening at the leading edge of the first peak of its integrated profile (IP); this was a new and unexpected result. This article reanalyzes their data, as well as some other related data, and argues that the spectrum is as likely to be unvarying (i.e., neither hardening nor softening).
Key words: pulsars / individual: PSR B0531+21 / X-ray: stars / phase resolved spectra
© ESO, 2002