X-Ray Emission from the Supernova Remnant CTA 1

Details X-Ray Emission from the Supernova Remnant CTA 1 X-Ray Emission from the Supernova Remnant CTA 1

Nov 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...453..284s&link_type=abstract

Astrophysical Journal v.453, p.284

Astronomy and Astrophysics

Astronomy

27

Galaxies: Seyfert, Ism: Individual Alphanumeric: Cta 1, Ism: Supernova Remnants, X-Rays: Ism

Scientific paper

Three pointings of the ROSAT PSPC have been used to map the X-ray emission of CTA 1. Emission is brightest at the center and extends in all directions to the boundaries of the remnant. The luminosity is model-dependent and (at 1.4 kpc), is, LX(0.1 24 keV) = 5-8 x 1034 ergs s-1. Emission from the center is harder and considerably brighter than that from the rim. Spectra from several parts of the remnant are fitted with two component models. Both a two-temperature thermal model and a model consisting of a power law and a soft thermal component produce good fits to all regions. The spectra do not allow us to distinguish between a remnant with hot evaporated material at the center, or an old Crab-like remnant. Both are plausible models for CTA 1.
The ROSAT HRI was used to obtain an accurate location of a bright unresolved source within the remnant. This is identified as a background active galactic nucleus. Properties of eight weaker, unresolved X-ray sources within or nearby the remnant are tabulated.

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