... NGC 4621

Based on observations collected at Canada-France-Hawaii Telescope, which is operated by CNRS of France, NRC of Canada, and the University of Hawaii.

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... package

http://www-obs.univ-lyon1.fr/~oasis/home/index.html

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... dataset

$(\alpha,\delta,\lambda)$, one spectrum per spatial element

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... tinytim

http://www.stsci.edu/software/tinytim/tinytim.html

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... data

Based on observations collected with the NASA/ESA HST, obtained at STScI, which is operated by AURA, Inc, under NASA contract NAS5-26555.

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... size

The limits of the CRC are defined by the zero-velocity curve.

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