... objects?

Based on observations taken at the Italian Telescopio Nazionale Galileo, TNG.

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...

Based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA member states and NASA.

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... IRAF

http://iraf.noao.edu

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... used

See the XMM-Newton Users' Handbook http://xmm.vilspa.esa.es/external/xmm_user_support/documentation/uhb/XMM_UHB.htm

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