Remarks on statistical errors in equivalent widths

Details Remarks on statistical errors in equivalent widths Remarks on statistical errors in equivalent widths

2006-06-14

arxiv.org/abs/astro-ph/0606341v4

Astron.Nachr.327:862-865,2006

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, accepted by Astronomical Notes

Scientific paper

10.1002/asna.200610645

Equivalent width measurements for rapid line variability in atomic spectral
lines are degraded by increasing error bars with shorter exposure times. We
derive an expression for the error of the line equivalent width
$\sigma(W_\lambda)$ with respect to pure photon noise statistics and provide a
correction value for previous calculations.

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