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Signal-to-noise ratio of narrow-line emission #124
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Thank you for the ticket @yuvoonng. Here are some notes I sent on Slack, which I'm copying for reference:
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@yuvoonng I'd like to address this issue soon. Do you have a sense of whether 10 pixels or so is sufficient for estimating the uncertainty in the continuum level around the narrow lines you've been studying? |
@moustakas Upon investigation for some sources, 10 pixels are sufficient to estimate the signal-to-noise ratio. Thank you. |
Addressed in #137. |
When FastSpecFit calculates the uncertainty of the amplitude, for spectra with narrow-line emission, it only uses a few pixels, which might lead to underestimating the uncertainty. As shown in the attached file, they do not appear as strong in the spectra as calculated.
sn_amp2.pdf
sn_amp.pdf
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