SIMBAD references

2007PASJ...59S.215Y - Publ. Astron. Soc. Jap., 59, 215-220 (2007/January-0)

Discovery of a new X-ray transient source in the Scutum region with Suzaku.

YAMAUCHI S., EBISAWA K., BAMBA A., ISHIDA M., IWASAWA K., TANAKA Y., KOKUBUN M., KOYAMA K., TAKAHASHI H. and TSUBOI Y.

Abstract (from CDS):

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 x 10–14 erg/s/cm2 (2-10keV), which may be a possible precursor. Later, the source exhibited a flare with a peak flux of ∼ 10–12 erg/s/cm2 (2-10keV). 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 1-10keV is consistent with a heavily absorbed (NH ∼ 3 x 1022 H/cm2) thin thermal emission with kT as high as ∼ 7 keV. 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.

Abstract Copyright:

Journal keyword(s): stars: flare - stars: individual (Suzaku J1844-0404) - X-rays: spectra - X-rays: stars - X-rays: transients

Simbad objects: 9

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