...
2017-02-181
http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia16avr/
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... Catalogue2
https://sne.space/sne/SN2016ehw/
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...
IRAF3
IRAF is distributed by the National Optical
Astronomy Observatory, which is operated by AURA under cooperative
agreement with the National Science Foundation.
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... database4
https://ned.ipac.caltech.edu/
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