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arcsec
/ ˈɑːksɛk /
noun
- 1 3600 of a degree of an angle
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Example Sentences
Photon events from the afterglow were selected using a circular extraction region of radius 1 arcsec, while the background level of 2.3 × 10−6 counts arcsec−2 s−1 was estimated from nearby source-free regions.
From Nature
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