Discovery of a New X-Ray Transient Source in the Scutum Region with Suzaku

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Author(s)

Abstract

During an observation of the Galactic plane in the Scutum region with the Suzaku satellite, we discovered a new X-ray transient source, designated Suzaku J1844-0404. Compared with previous Chandra observations of the same field, four Chandra X-ray sources exist within the current positional uncertainty of Suzaku J1844-0404. A firm identification is not possible. From the beginning of the observation, the X-ray intensity was significant at ∼ 5×10-14 erg s-1 cm-2 (2–10 keV), which may be a possible precursor. Later, the source exhibited a flare with a peak flux of ∼ 10-12 erg s-1 cm-2 (2–10 keV). A strong and narrow emission line at ∼ 6.66 keV was observed during the flare, most likely the He-like Fe line. The spectrum in 1–10 keV is consistent with a heavily absorbed (NH ∼3×1022Hcm-2) thin thermal emission with kT as high as ∼7keV. A single short flare, as observed, is rather unlikely for a cataclysmic variable. The source is probably an active binary star or a young stellar object.

Journal

  • Publications of the Astronomical Society of Japan

    Publications of the Astronomical Society of Japan 59(1), S215-S220, 2007-01-31

    日本天文学会

References:  32

Cited by:  2

Codes

  • NII Article ID (NAID)
    10023948944
  • NII NACSIS-CAT ID (NCID)
    AA1082896X
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    00046264
  • NDL Article ID
    8621334
  • NDL Source Classification
    ZM33(科学技術--宇宙科学)
  • NDL Call No.
    Z53-A296
  • Data Source
    CJP  CJPref  NDL  IR 
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