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Comments on “Remarks on statistical errors in equivalent width” by K. Vollmann & T. Eversberg
Author(s) -
Netzel C.
Publication year - 2018
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.201713382
Subject(s) - expression (computer science) , mathematics , physics , statistical physics , thermodynamics , mathematical physics , combinatorics , statistics , computer science , programming language
Both Chalabaev & Maillard and Vollmann & Eversberg proposed calculation methods for the statistical error of the equivalent width. Both methods can lead to very different error bars. Here we present a straightforward expression for normalized spectra, which makes use of only standard commands of IRAF and favors the first method.