AbstractThe wind-accreting X-ray binary pulsar Vela X-1 has been observed during the two INTEGRAL Core Program observations of the Vela region in June–July and November–December 2003.Preliminary results on time averaged and time resolved spectra of INTEGRAL/SPI for the two observation epochs are presented. Time averages have been used in order to increase the signal to noise ratio, but cyclotron line features expected at ∼20–25 and ∼53keV are without any doubt detected in the INTEGRAL/SPI spectra. This work shows that the detection of cyclotron feature as given in [Kretschmar, P., Staubert, R., Kreykenbohm, I., et al. In: Proceedings of 5th INTEGRAL Workshop, 2004.] should be taken with caution due to background modelling uncertainties. Further work using a better in-flight energy calibration and background monitoring is planed to improve the analysis.


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    Titel :

    Search for cyclotron lines in INTEGRAL/SPI spectra of Vela X-1


    Beteiligte:
    Attié, D. (Autor:in) / Schanne, S. (Autor:in) / Sizun, P. (Autor:in) / Kreykenbhom, I. (Autor:in) / Staubert, R. (Autor:in) / Kretschmar, P. (Autor:in) / von Kienlin, A. (Autor:in) / Chernyakova, M. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 38 , 7 ; 1448-1452


    Erscheinungsdatum :

    2005-06-28


    Format / Umfang :

    5 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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