ROSAT/Optical Observations of 2S 0114+65: A Study of the 2.8 Hour Periodic Outbursts
Abstract
Observations of the massive X-ray binary 2S 0114 + 65 acquired in 1992 July with the ROSAT Position Sensitive Proportional Counter (PSPC) in the 0.1-2.4 keV X-ray band and in 1992 September with the 0.9 m telescope at Kitt Peak National Observatory (KPNO) in the optical V band are reported. The X-ray data confirm the presence of persistent 2.78 hr outbursts as previously deduced from archival data. The X-ray source displays apparent orbital effects consistent with noncircularity. Variable intrinsic absorption and intrinsic spectral variations are excluded as the cause of the X-ray modulation. The optical V-band photometic data do not reveal any periodic modulation. The possibilty that the 2.78 hr period is the rotation of the neutron star component is entertained.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1994
- DOI:
- 10.1086/174324
- Bibcode:
- 1994ApJ...429..356F
- Keywords:
-
- Neutron Stars;
- Periodic Variations;
- X Ray Binaries;
- Astronomical Photometry;
- Ginga Satellite;
- Heao 1;
- Oso-8;
- Rosat Mission;
- Astronomy;
- STARS: INDIVIDUAL ALPHANUMERIC: 2S 0114;
- 65;
- STARS: NEUTRON;
- X-RAYS: STARS