EXOSAT and optical observations of the X-ray burst source 4U/MXB1636-53

Details EXOSAT and optical observations of the X-ray burst source 4U/MXB1636-53 EXOSAT and optical observations of the X-ray burst source 4U/MXB1636-53

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..255t&link_type=abstract

(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews

Astronomy and Astrophysics

Astronomy

14

Neutron Stars, Spaceborne Astronomy, Stellar Spectrophotometry, X Ray Sources, Accretion Disks, Black Body Radiation, Bursts, Emission Spectra, Exosat Satellite, Spectral Energy Distribution, Visible Spectrum

Scientific paper

During May 1984 the authors made a one-day EXOSAT observation of the X-ray burst source 4U/MXB1636-53, partly simultaneous with Tenma and with optical observations at ESO. The authors give a short description of the main results: (1) Discovery of a constant blackbody component in the persistent X-ray emission; (2) Discovery of X-ray bursts which seem to proceed in two distinct steps; (3) Evidence for a systematic deviation, at high temperatures, of X-ray burst spectra from Planckian curves; (4) Some evidence for the preferential occurrence of a strong 4.1 keV feature in burst spectra during the initial stages of strong bursts; (5) Detection of a simultaneous optical burst.

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