Observations of the supernova remnant G54.1+0.3: X-ray spectrum and evidence for an X-ray jet
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, 85748 Garching bei München, Germany
2 Laboratory of Cosmic Ray and High Energy Astrophysics, Institute of High Energy Physics, CAS, Beijing 100039, China
Corresponding author: F. J. Lu, firstname.lastname@example.org
Accepted: 15 February 2001
We present analyses of the ROSAT PSPC and the ASCA SIS and GIS observations of the Crab-like supernova remnant (SNR) G54.1+0.3. The spectrum is best fitted by a power law model with a photon index of -1.9, absorbed energy flux of 6.8 10-12 erg cm-2 s-1 in the 0.7-10 keV band, and a column density of 17.9 cm-2. The high absorption column density indicates a distance close to the radius of the galaxy. The 0.7-10.0 keV X-ray luminosity of G54.1+0.3 is 1.4 1035 erg s-1, where d10 is the distance in 10 kpc. With an image restoration method, we have deconvolved the X-ray image of the remnant. There is evidence for an X-ray jet pointing to the north-east with a length of about 40″ measured from the center of the nebula. Its X-ray luminosity in the 0.1-2.4 keV range is about 2.1 1034 erg s-1. The X-ray jet is consistent with the radio extension of G54.1+0.3 to the north-east in both direction and position.
Key words: X-ray: ISM / ISM: supernova remnants / ISM: jet and outflows / ISM: individual: G54.1+0.3
© ESO, 2001