The cosmic X-ray background spectrum observed with ROSAT and ASCA
Abstract
We have made a series of joint spectral fits for two blank fields, the Lockman Hole and the Lynx-3A field, where a significant amount of both ASCA and ROSAT PSPC data exist after thorough screenings. The ASCA SIS, GIS and ROSAT PSPC spectra from these fields have been fitted simultaneously. Comparison at E>1 keV shows general agreement within 10% in the Lockman Hole data and a 20-30% disagreement in the Lynx-3A data, indicating remaining observation-dependent systematic problems. In both cases, satisfactory fits have been found for the overall 0.1-10 keV spectrum with an extragalactic power-law component (or a broken power-law component with steepening at E<1 keV), a hard thermal component with plasma temperature of kT() h~0.14 keV and a soft thermal component kT() s~0.07 keV.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1998
- DOI:
- 10.48550/arXiv.astro-ph/9803320
- arXiv:
- arXiv:astro-ph/9803320
- Bibcode:
- 1998A&A...334L..13M
- Keywords:
-
- ISM: BUBBLES;
- GALAXY: HALO;
- COSMOLOGY: DIFFUSE RADIATION;
- X-RAYS: GENERAL;
- Astrophysics
- E-Print:
- 4 pages, 3 postscript figures, using aa.cls, accepted to A&