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The discovery of a 25 min regular modulation in the X-ray flux from 2S0142+61 (1985)

White, N. E. ; Giommi, P. ; Parmar, A. N. ; [et al.]

Springer

Space science reviews 40 (1985), S. 157-162

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ISSN: 1572-9672

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract A 13 hr observation of 2S0142+61 on 1984 August 27 by EXOSAT shows the X-ray flux of 2S0142+61 to be modulated with a period of 1456+/-6 s. The 1–10 keV spectrum is two component with a ∼0.7 keV thermal and 0.0 energy index power law, with 30% of the total luminosity in the thermal component. The spectrum is absorbed by ∼1 × 1022 H cm-2. Only the hard component is pulsed with a 3 to 10 keV peak to mean amplitude of 35%. Below 2 keV the modulation is less than a few percent. The total 1–10 keV luminosity is 3.5 × 1032 erg s-1 for a distance of 100 pc. Possible optical counterparts are discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00212881

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