A MAJOR X-RAY OUTBURST FROM AN ULTRALUMINOUS X-RAY SOURCE IN M82
نویسندگان
چکیده
منابع مشابه
A Major X-ray Outburst from an Ultraluminous X-ray Source in M82
We detected a major X-ray outburst from M82 with a duration of 79 days, an average flux of 5×10 erg cm s in the 2-10 keV band, and strong variability. The X-ray spectrum remained hard throughout the outburst. We obtained a Chandra observation during the outburst that shows that the emission arises from the ultraluminous X-ray source X41.4+60. This source has an unabsorbed flux of (5.4± 0.2)× 10...
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The starburst galaxy M82 contains two ultraluminous X-ray sources (ULXs), CXOM82 J095550.2+694047 (=X41.4+60) and CXOM82 J095551.1+694045 (=X42.3+59), which are unresolved by XMM-Newton. We revisited the two XMM-Newton observations of M82 and analyzed the surface brightness profiles using the known Chandra source positions. We show that the quasi-periodic oscillations (QPOs) detected with XMM-N...
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We report first clear evidence for the simultaneous presence of a low frequency break and a QPO in the power spectrum of a well known ultralumnious X-ray source (ULX) in M82 using long XMMNewton observations. The break occurs at a frequency of 34.2 −3 mHz. The QPO has a centroid at νQPO = 114.3± 1.5 mHz, a coherence Q ≡ νQPO/∆νFWHM ≃ 3.5 and an amplitude (rms) of 19% in the 2− 10 keV band. The ...
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We have studied a highly variable ultraluminous X-ray source (ULX) in the Fornax galaxy NGC1365, with a series of 12 Chandra and XMM-Newton observations between 2002 and 2006. In 2006 April, the source peaked at a luminosity ≈ 3 × 10 erg s in the 0.3–10 keV band (similar to the maximum luminosity found by ASCA in 1995), and declined on an e-folding timescale ≈ 3 days. The X-ray spectrum is alwa...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/692/1/653