Spectral observation of the composite supernova remnant G 29.7-0.3 |
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Authors: | L Koch-Miramond R Rocchia J Davelaar F A Jansen R H Becker R Braun |
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Institution: | (1) CEN Saclay, The Netherlands;(2) European Space Operation Center, Darmstadt;(3) Laboratory for Space Resarch, Leiden;(4) University of California, Davis;(5) Terrewacht, Leiden |
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Abstract: | The X-ray properties of the supernova remnant G 29.7-0.3 are discussed based on spectral data from the EXOSAT satellite. In the 2 to 10 keV range a featureless power-law spectrum is obtained, the best-fit parameters being: energy spectral index =-0.77, hydrogen column density on the line of sight NH=2.3.1022 cm–2. The incident X-ray flux from the source is (3.6±0.1) 1011 erg cm–2 s–1 in the 2 to 10 keV range corresponding to an intrinsic luminosity of about 2. 1036 erg s–1 for a distance of 19 kpc. The source was not seen with the imaging instrument thus constraining the hydrogen column density to be NH=(3.3 ±0.3) 1022 cm–2 and the energy spectral index =1.0±0.15. This new observation is consistent with emission by a synchroton nebula presumably fed by an active pulsar. An upper limit of 1.5% for the pulsed fraction in the range of periods 32ms to 104 s has been obtained. |
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