... source

Based on observations collected at the Bologna Astronomical Observatory in Loiano, Italy, and at the Astronomical Observatory of Asiago, Italy.

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... (DSS)

http://archive.eso.org/dss/dss/

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... (2MASS)

http://www.ipac.caltech.edu/2mass/

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... IRAF

http://iraf.noao.edu/

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... Meeting

http://www.unico.it/ilaria/AGN5/proceedings.html

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