High-Energy pulse profile of the Transient X-ray Pulsar SAX J2103.5+4545

Tiziana Di Salvo, Natale Robba, Rosario Iaria, Falanga, Goldwurm, Bonnet-Bidaud, Goldoni, Burderi, Giuseppe Lavagetto

Risultato della ricerca: Articlepeer review

8 Citazioni (Scopus)

Abstract

Two recent INTEGRAL papers report a timing and spectral analysis of the transient Be/X-ray pulsar SAX J2103.5+4545 at high energies (5-200 keV). In this work we present for the first time a study of the pulse profile at energies above 20 keV using INTEGRAL data. The spin-pulse profile shows a prominent (with a duty cycle of 14%) and broad (with a FWHM of similar to 51 s) peak and a secondary peak which becomes more evident above 20 keV. The pulsed fraction increases with energy from similar to 45% at 5-40 keV to similar to 80% at 40-80 keV. The morphology of the pulse profile also changes as a function of energy, consistent with variations in the spectral components that are visible in the pulse phase resolved spectra. A study of the double peaked profile shows that the difference in the two peaks can be modeled by a different scattering fraction between the radiation from the two magnetic poles.
Lingua originaleEnglish
pagine (da-a)313-317
Numero di pagine5
RivistaASTRONOMY & ASTROPHYSICS
Volume436
Stato di pubblicazionePublished - 2005

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.1900.1912???

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