https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/PIPE2D-871 DRP 2-D Pipeline <p>Write a code to perform the estimate of a radial velocity from a spectrum for flux calibration work in the 2DDRP pipeline. The draft code is based on the study in <a href="https://pfspipe.ipmu.jp/jira/browse/PIPE2D-649" title="Estimate radial velocities of flux calibration stars" class="issue-link" data-issue-key="PIPE2D-649"><del>PIPE2D-649</del></a> (<a href="https://pfspipe.ipmu.jp/jira/browse/PIPE2D-649" class="external-link" rel="nofollow">https://pfspipe.ipmu.jp/jira/browse/PIPE2D-649</a>). The radial velocity is estimated by taking a cross-correlation between a spectrum and a model template.</p> PIPE2D-871

Code implementation of the radial velocity estimate for flux calibration

Story Normal Done Done sogo.mineo Takuji Yamashita flux-calibration Mon, 19 Jul 2021 08:30:32 +0000 Wed, 29 Sep 2021 05:29:23 +0000 Wed, 29 Sep 2021 05:29:23 +0000 0 2 <p>Because I have been working on this task for all too long a time, I provisionally pushed my current codes as <tt>tickets/<a href="https://pfspipe.ipmu.jp/jira/browse/PIPE2D-871" title="Code implementation of the radial velocity estimate for flux calibration" class="issue-link" data-issue-key="PIPE2D-871"><del>PIPE2D-871</del></a></tt>. The test code does not pass due to immense systematic errors. I think I should make my own changes in the current algorithm, which had been passed to me and had undergone corrections of only obvious mistakes. That will take some time.</p> <p>Test passed. The problem turned out to be the too narrow sampling interval of the cross correlation function, for neighboring samples made from too similar linear-combinations of random variables, or observed spectrum, cause their covariance matrix almost defective, troubling <tt>scipy.optimize.curve_fit()</tt>, resulting in strange output. I'm making PR.</p> <p>Could you review the pull request?</p> <p>Thank you for the review. I merged this branch to master.</p> Blocks PIPE2D-371 Development Epic Link PIPE2D-303 Rank 0|zzs8lk: Reviewers price