Spectral observation of the composite supernova remnant G 29.7-0.3
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 α=-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 α=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.
- Publication:
-
Space Science Reviews
- Pub Date:
- April 1985
- DOI:
- 10.1007/BF00179865
- Bibcode:
- 1985SSRv...40..521K
- Keywords:
-
- Astronomical Spectroscopy;
- Spaceborne Astronomy;
- Supernova Remnants;
- Synchrotron Radiation;
- X Ray Spectra;
- Energy Spectra;
- Exosat Satellite;
- Hydrogen;
- Radiant Flux Density;
- Relativistic Electron Beams;
- Stellar Evolution;
- Stellar Magnetic Fields;
- Stellar Spectrophotometry;
- Astrophysics