SIMBAD references

2005ApJ...620L..31K - Astrophys. J., 620, L31-L34 (2005/February-2)

The optical counterpart of M101 ULX-1.

KUNTZ K.D., GRUENDL R.A., CHU Y.-H., CHEN C.-H.R., STILL M., MUKAI K. and MUSHOTZKY R.F.

Abstract (from CDS):

We have identified the optical counterpart of the ultraluminous X-ray source M101 ULX-1 (CXOKM101 J140332.37+542102), by comparing Hubble Space Telescope Advanced Camera for Surveys images with Chandra ACIS-S images. The optical counterpart has V=23.75 and colors consistent with those for a mid-B supergiant. Archival Wide Field Planetary Camera 2 observations show that the source brightness is constant to within ∼0.1 mag. The physical association of this source with the ULX is confirmed by Gemini Multi-Object Spectrograph observations that show spatially unresolved He II λ4686 and He I λ5876 emission. These results suggest that M101 ULX-1 is a high-mass X-ray binary, but deep spectroscopic monitoring observations are needed to determine the detailed properties of this system.

Abstract Copyright:

Journal keyword(s): X-Rays: Binaries - X-Rays: Individual: Alphanumeric: M101 ULX-1

Nomenclature: [KGC2005] M101 ULX-1 N=1.

Simbad objects: 6

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2020.09.26-21:22:27

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