Ariel V sky survey observations of X rays from the globular cluster candidates 3U2131+11 and MXO513-40
Abstract
THE high energy (2-18 keV) detector system of the Ariel V X-ray sky survey experiment (SSE) has observed the faint, high galactic latitude X-ray sources 3U2131+11 and MXO513-40 on a number of separate occasions over a period of a year (January-December 1975) and the results are reported here. These sources have previously been observed by OSO-7 (and 3U2131+11 also by Uhuru), and the globular clusters NGC 7078 and NGC 1851 respectively, were proposed as identifications1,2. Variability of the timescales of days to months was also observed2.
- Publication:
-
Nature
- Pub Date:
- April 1976
- DOI:
- 10.1038/260410a0
- Bibcode:
- 1976Natur.260..410P
- Keywords:
-
- Ariel Satellites;
- Globular Clusters;
- Sky Surveys (Astronomy);
- Spaceborne Astronomy;
- X Ray Astronomy;
- X Ray Sources;
- Binary Stars;
- Black Holes (Astronomy);
- Satellite Observation;
- X Ray Spectra;
- Astronomy