Random triples
| Subject | Object |
|---|---|
| gptkb:Centaurus_X-1 | soft X-ray spectra |
| gptkb:Centaurus_X-3 | yes |
| gptkb:Cygnus_X-3 | X-ray spectra analyzed |
| gptkb:Cygnus_X-1 | hard X-ray spectra |
| gptkb:Cygnus_X-19 | characteristic of black holes |
| gptkb:Cygnus_X-1 | characteristic of black holes |