New Observations of the Ultraluminous X-ray source 1E0953.8+6918 in Holmberg IX

Details New Observations of the Ultraluminous X-ray source 1E0953.8+6918 in Holmberg IX New Observations of the Ultraluminous X-ray source 1E0953.8+6918 in Holmberg IX

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.0810e&link_type=abstract

American Astronomical Society, 200th AAS Meeting, #08.10; Bulletin of the American Astronomical Society, Vol. 34, p.654

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present new observations of 1E0953.8+6918, an apparent ultraluminous X-ray binary in the M81 group galaxy Holmberg IX, and its associated emission-line shell. Deep MMT spectra allow us to constrain the relative contributions of shock heating and photoionization in exciting the nebula, while our Chandra and VATT observations unambigously reveal the optical counterpart of the compact X-ray source. If the compact object emits isotropically near the Eddington limit, it would be a 100 Msol black hole; we will also address alternative models.

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