Non-detection of kHz QPOs in GX 9+1 and GX 9+9
| dc.creator | Wijnands, Rudy | |
| dc.creator | van der Klis, Michiel | |
| dc.creator | van Paradijs, Jan | |
| dc.date | 1997-11-19 | |
| dc.date.accessioned | 2026-07-07T02:25:10Z | |
| dc.date.available | 2026-07-07T02:25:10Z | |
| dc.description | In numerous low-mass X-ray binaries kHz quasi-periodic oscillations (kHz QPOs) are detected. We observed the atoll sources GX 9+1 and GX 9+9 with the RXTE satellite. Both sources were on the (upper) banana branch during our observations. No kHz QPOs were detected, with upper limits of 1.3-1.8 %. It is known from other atoll sources (e.g. 4U 1636-53 and 4U 1820-30) that when they are in the upper banana branch the kHz QPOs are not detected. Thus, it remains possible that when GX 9+1 and GX 9+9 are observed longer on the lower banana, or even in the island state, kHz QPOs are detected in these sources. | |
| dc.description | 2 pages, 1 figure. To appear in the proceedings of IAU Symposium 188 "The Hot Universe" | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9711222 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9711222 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/11827 | |
| dc.subject | Astrophysics | |
| dc.title | Non-detection of kHz QPOs in GX 9+1 and GX 9+9 | |
| dc.type | text |