Collections
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Known #Quasar / #AGN, known candidates, and likely candidates per SED by mboschmd (10 subjects)
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Marton YSOc Candidates by mboschmd (10 subjects)
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Hα emission-line stars by miltonbosch (10 subjects)
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Possible quasar / AGN (no SIMBAD) by Shigeru (10 subjects)