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Remarks on statistical errors in equivalent widths
Author(s) -
Vollmann K.,
Eversberg T.
Publication year - 2006
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200610645
Subject(s) - physics , statistical physics , mathematics , statistics , astrophysics
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 σ ( W λ ) with respect to pure photon noise statistics and provide a correction value for previous calculations. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)