AbstractWe are conducting a survey of Galactic shell-type supernova remnants (SNRs) known or suspected to possess non-thermal components to their X-ray emission using new and archived observations made with such X-ray satellites as ROSAT, ASCA, RXTE, Chandra and XMM-Newton. This research is intended to probe the phenomenon of cosmic-ray acceleration by Galactic SNRs and estimate the maximum energy of cosmic-ray electrons accelerated by these sources. To illustrate this work, we examine the X-ray spectrum of the northwestern rim of an SNR suspected to have a non-thermal component to its X-ray emission, G156.2+5.7 (RX J04591+5147), over the energy range ≈0.7–12.0 keV using observations made by the ASCA GIS and the RXTE PCA. We compare fits made to the non-thermal component using two models, a simple power law and SRCUT. Both models give acceptable fits: the photon index derived from the fit made with the power law model (Γ=2.0+0.2−0.5) is comparable to values obtained for the bright rims of other SNRs with hard X-ray spectra. Using the SRCUT model, we derive a value of 2.42+0.24−0.23×1017 Hz for the cutoff frequency νcutoff: based on this value and assuming a mean magnetic field strength of 14 μG, we estimate the cutoff energy Ecutoff of cosmic-ray electrons accelerated by G156.2+5.7 to be ≈32 TeV. This energy value is well short of the “knee” feature of the cosmic-ray spectrum.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    ASCA and RXTE observations of non-thermal X-ray emission from galactic supernova remnants: G156.2+5.7


    Contributors:
    Pannuti, T.G (author) / Allen, G.E (author)

    Published in:

    Advances in Space Research ; 33 , 4 ; 434-439


    Publication date :

    2003-07-21


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    ASCA and RXTE Observations of Non-Thermal X-Ray Emission from Galactic Supernova Remnants: G156.2 + 5.7

    Pannuti, T. G. / Allen, G. E. / International Council of Scientific Unions | British Library Conference Proceedings | 2004


    Non Thermal X-Ray From Galactic Supernova Remnants

    Tomida, H. / Koyama, K. / Yokogawa, J. et al. | British Library Conference Proceedings | 2000


    A census of high-energy observations of Galactic supernova remnants

    Ferrand, Gilles / Safi-Harb, Samar | Elsevier | 2012