View source for PSR J1311–3430

A '''Snowden''' is a unit of [[soft X-ray]] [[emissivity]], equivalent to <math>10^{-6}</math> counts <math>s^{-1} arcmin^{-2}</math>.<ref>[http://adsabs.harvard.edu/abs/2011ApJ...735..129P The Local Leo Cold Cloud and New Limits on a Local Hot Bubble]</ref>

==References==
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[[Category:Units of measurement]]