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Detection of extended very-high-energy gamma-ray emission towards the young stellar cluster Westerlund 2 (2007)
Journal Article

Aims. Results from $\gamma$-ray observations by the HESS telescope array in the direction of the young stellar cluster Westerlund 2 are presented. Methods. Stereoscopic imaging of Cherenkov light emission of $\gamma$-ray induced showers in the atmosp... Read More about Detection of extended very-high-energy gamma-ray emission towards the young stellar cluster Westerlund 2.

Constraints on accretion in ultraluminous X-ray sources from Spitzer IRS observations of NGC 4485/4490: Infrared diagnostic diagrams (2007)
Journal Article

Constraining the astrophysical nature of ultraluminous X-ray (ULX) sources, which have X-ray luminosities exceeding 1039 ergs s1, has been elusive due to the optical faintness of any counterparts. With high spectral resolution observations in the ∼10... Read More about Constraints on accretion in ultraluminous X-ray sources from Spitzer IRS observations of NGC 4485/4490: Infrared diagnostic diagrams.