Coordinated EXOSAT and Optical Observations of the X-Ray Burster 4U1737-44
Abstract
We present the first results of an EXOSAT observation of the low-mass X-ray burster 4U1735-44. The ME data show low-amplitude variations in the persistent flux including two 5% dips separated by ∼4 hours. The structure of the single observed burst is briefly described. Five hours of simultaneous B-band photometry were obtained at SAAO with 12 minute time resolution; a strong anti-correlation is shown to exist between the X-ray and optical flux, with a high level of significance. A model for this behaviour is suggested, based on reprocessing of the X-ray flux in a corona or stellar wind.
- Publication:
-
Space Science Reviews
- Pub Date:
- February 1985
- DOI:
- 10.1007/BF00212899
- Bibcode:
- 1985SSRv...40..281S
- Keywords:
-
- Radiant Flux Density;
- Spaceborne Astronomy;
- Spectral Energy Distribution;
- Visible Spectrum;
- X Ray Sources;
- Bursts;
- Stellar Coronas;
- Stellar Mass;
- Stellar Spectrophotometry;
- Stellar Winds;
- Astrophysics