Low-energy line emission from Cygnus X-2 observed with the BeppoSAX LECS
| dc.creator | Kuulkers, E. | |
| dc.creator | Parmar, A. N. | |
| dc.creator | Owens, A. | |
| dc.creator | Oosterbroek, T. | |
| dc.creator | Lammers, U. | |
| dc.date | 1997-06-02 | |
| dc.date.accessioned | 2026-07-07T02:23:29Z | |
| dc.date.available | 2026-07-07T02:23:29Z | |
| dc.description | We present a 0.2-10 keV spectrum of the low-mass X-ray binary Cygnus X-2 obtained using the Low Energy Concentrator Spectrometer on-board Bepposax. The spectrum can be described by a cut-off power-law model with absorption of (2.28 +/- 0.07) 10^{21} atoms/cm^2, a power-law index of 0.78 +/- 0.02 and a cut-off energy of 4.30 +/- 0.08 keV (68% confidence errors), except at energies near ~1 keV where excess emission is present. This can be modeled by a broad Gaussian line feature with an energy of 1.02 +/- 0.04 keV, a full width half-maximum of 0.47 +/- 0.07 keV and an equivalent width of 74 +/-^{25}_{11} eV. This result confirms earlier reports of line emission near 1 keV and shows the intensity and structure of the feature to be variable. | |
| dc.description | 4 pages. Accepted for publication in A&A (Letters) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9706009 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9706009 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/11268 | |
| dc.subject | Astrophysics | |
| dc.title | Low-energy line emission from Cygnus X-2 observed with the BeppoSAX LECS | |
| dc.type | text |