Based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway, and Sweden.

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Based on observations made at the 2.2-m telescope of the German-Spanish Calar Alto Observatory.

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...

Based on observations made with the Isaac Newton Telescope operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias.

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... (GCN)

http://gcn.gsfc.nasa.gov/gcn/

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