Topic
unit of soft X-ray emissivity
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A Snowden is a unit of soft X-ray emissivity, equivalent to ROSAT counts . These units were chosen by S. L. Snowden when working with the ROSAT mission to create the ROSAT All-Sky Survey in order to make the surface brightness values fit into a two byte integer.
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A Snowden is a unit of soft X-ray emissivity, equivalent to
10
−
6
{\displaystyle 10^{-6}}
ROSAT counts
s
−
1
a
r
c
m
i
n
−
2
{\displaystyle s^{-1}arcmin^{-2}}
. These units were chosen by S. L. Snowden when working with the ROSAT mission to create the ROSAT All-Sky Survey in order to make the surface brightness values fit into a two byte integer.
