Upper limits for the X-ray emission of PC 0953+4749.
Abstract
An upper limit for the X-ray emission of the z=4.5 quasar PC 0953+4749 from ROSAT observations is reported. The observed upper limit is consistent with the optical magnitude and with the assumption of a normal value of α_ox_.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1995
- Bibcode:
- 1995A&A...295...43M
- Keywords:
-
- Brightness Distribution;
- Emission Spectra;
- Quasars;
- X Ray Spectra;
- Energy Spectra;
- Magnitude;
- Proportional Counters;
- Red Shift;
- Rosat Mission;
- X Ray Astronomy;
- Astronomy;
- QUASARS: INDIVIDUAL: PC 0953+4749;
- X-RAYS: GALAXIES