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- W2014459103 abstract "We present new optical and Chandra observations of the field containing the ultraluminous X-ray source NGC 1313 X-2. On an ESO 3.6 m image, the Chandra error box embraces an R = 21.6 pointlike object and excludes a previously proposed optical counterpart. The resulting X-ray/optical flux ratio of NGC 1313 X-2 is ~500. The value of fX/fopt, the X-ray variability history, and the spectral distribution derived from a reanalysis of the ROSAT, ASCA, and XMM-Newton data indicate a luminous X-ray binary in NGC 1313 as a likely explanation for NGC 1313 X-2. If the X-ray soft component observed in the XMM-Newton EPIC spectrum originates from an accretion disk, the inferred mass of the compact remnant is ≈100 M☉, making it an intermediate-mass black hole. The derived optical luminosity (L ≈ 105 L☉) is consistent with that of a ≈15-20 M☉ companion. The properties of the environment of NGC 1313 X-2 are briefly discussed." @default.
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- W2014459103 date "2004-03-10" @default.
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- W2014459103 title "The Ultraluminous X‐Ray Source NGC 1313 X‐2 (MS 0317.7−6647) and Its Environment" @default.
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- W2014459103 doi "https://doi.org/10.1086/381541" @default.
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