Results of Ginga/ROSAT simultaneous observation of the X-ray burst source 1735-444

Kwang Il Seon, Kyoung Wook Min, Kenji Yoshida, Fumiyoshi Makino, Walter H.G. Lewin, Michiel Van Der Klis, Jan Van Paradijs

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7 Citations (Scopus)


We present a detailed analysis of simultaneous Ginga and ROSAT observations of the X-ray burst source 1735-444, during which the source was in an unusually high luminosity state. The source shows the characteristics of an atoll source in the high-intensity (banana) state, with a general correlation between intensity and spectral hardness. A blackbody component contributes ∼15%-20% of the total flux when the conventional two-component model is used to fit the spectra. We also observed a bright burst with radius expansion at this very high luminosity. The burst spectrum could not be described by a simple blackbody model. We discuss possible explanations.

Original languageEnglish
Pages (from-to)398-407
Number of pages10
JournalAstrophysical Journal
Issue number1 PART I
Publication statusPublished - 1997
Externally publishedYes


  • Binaries: close
  • Stars: individual (1735-444)
  • X-rays: bursts
  • X-rays: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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