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Swift/XRT observations of superorbital modulations in wind-fed supergiant X-ray binaries.
- Source :
- Monthly Notices of the Royal Astronomical Society; Feb2024, Vol. 527 Issue 4, p10993-11014, 22p
- Publication Year :
- 2024
-
Abstract
- We present the first Swift /XRT long-term monitoring of 2S 0114+650, a wind-fed supergiant X-ray binary for which both orbital and superorbital periods are known (P <subscript>orb</subscript> ∼ 11.6 d and P <subscript>sup</subscript> ∼ 30.8 d). Our campaign, summing up to ∼79 ks, is the most intense and complete sampling of the X-ray light curve of this source with a sensitive pointed X-ray instrument, and covers 17 orbital, and 6 superorbital cycles. The combination of flexibility, sensitivity, and soft X-ray coverage of the X-ray telescope (XRT) allowed us to confirm previously reported spectral changes along the orbital cycle of the source and unveil the variability in its spectral parameters as a function of the superorbital phase. For completeness, we also report on a similar analysis carried out by exploiting XRT archival data on three additional wind-fed supergiant X-ray binaries IGR J16418−4532, IGR J16479−4514, and IGR J16493−4348. For these sources, the archival data provided coverage along several superorbital cycles but our analysis could not reveal any significant spectral variability. [ABSTRACT FROM AUTHOR]
- Subjects :
- X-ray binaries
X-ray telescopes
SOFT X rays
LIGHT curves
X-rays
GAMMA ray bursts
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 527
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 175010991
- Full Text :
- https://doi.org/10.1093/mnras/stad3878