The Flattering of the X-Ray Spectrum of Sco X-1 at Energies beyond 40 keV

Details The Flattering of the X-Ray Spectrum of Sco X-1 at Energies beyond 40 keV The Flattering of the X-Ray Spectrum of Sco X-1 at Energies beyond 40 keV

Mar 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971ap%26ss..10..500a&link_type=abstract

Astrophysics and Space Science, Volume 10, Issue 3, pp.500-507

Astronomy and Astrophysics

Astrophysics

17

Scientific paper

The measurements of the hard X-ray spectrum of Sco X-1 in the energy interval 20 150 keV in three balloon flights from Hyderabad, India are reported. These results show conclusively that the spectrum of Sco X-1 is very flat in the energy interval 40 150 keV and the measured fluxes beyond 60 keV are several orders of magnitude higher than those expected on the basis of an extrapolation of bremsstrahlung spectrum from a thin hot plasma at a temperature corresponding tokT=5 keV, which is applicable for Sco X-1 for energies <40 keV. The results are compared with those of other investigators of hard X-rays from Sco X-1, and the implication of the results is briefly discussed.

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