<i>SWIFT</i>OBSERVATIONS OF THE ULTRALUMINOUS X-RAY SOURCE HOLMBERG IX X-1

Kong, Albert; Yang, Yi; Yen, T.-C.; Feng, Hua; Kaaret, Philip

doi:10.1088/0004-637x/722/2/1816

Cited by 16 publications

(2 citation statements)

References 37 publications

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“…While there are transient ULXs that show orders of magnitude of variation (similar to low mass X-ray binaries, e.g., Middleton et al 2013), even at peak luminosity these tend to be the fainter members of the ULX population. The brighter ULXs tend to be variable only by a factor of ∼a few, broadly similar to high mass X-ray binaries, (e.g., Kong et al 2010;Walton et al 2013a). Until this work, the behavior observed from NGC 5907 ULX1 was similar to this latter population, consistent with its extreme luminosity.…”

Section: Discussionmentioning

confidence: 64%

NUSTARANDXMM-NEWTONOBSERVATIONS OF THE EXTREME ULTRALUMINOUS X-RAY SOURCE NGC 5907 ULX1: A VANISHING ACT

Walton

Harrison

Bachetti

et al. 2015

ApJ

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Section: Discussionmentioning

confidence: 64%

NUSTARANDXMM-NEWTONOBSERVATIONS OF THE EXTREME ULTRALUMINOUS X-RAY SOURCE NGC 5907 ULX1: A VANISHING ACT

Walton

Harrison

Bachetti

et al. 2015

ApJ

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“…Holmberg IX X-1 is one of the best studied extreme ULXs, which although known to vary in flux (e.g., Kong et al 2010;Vierdayanti et al 2010) is one of the few sources (within ∼5 Mpc) to persistently radiate at L X > 10 40 erg s −1 . Early XMM-Newton observations revealed the possible presence of a very cool accretion disk (Miller et al 2003), which may evolve in a fashion similar to the L ∝ T 4 relation expected for simple blackbody radiation (Miller et al 2013b), and indicate the presence of a massive black hole.…”

Section: Introductionmentioning

confidence: 99%