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-837 DRP 2-D Pipeline <p>In order to derive the best fit stellar model based on the combined probability function of P_photometry and P_spectrum, we re-grid the stellar parameters. The best fit spectrum is extracted from the RBF model (<a href="https://pfspipe.ipmu.jp/jira/browse/PIPE2D-460" title="Evaluate the interpolations between model templates" class="issue-link" data-issue-key="PIPE2D-460"><del>PIPE2D-460</del></a>). </p> PIPE2D-837

Regrid stellar parameters for combined P_HSC and P_PFS

Story Normal Done Done Takuji Yamashita Takuji Yamashita flux-cal-vector flux-calibration Thu, 13 May 2021 07:39:53 +0000 Tue, 6 Jul 2021 04:49:53 +0000 Tue, 6 Jul 2021 04:49:53 +0000 0 3 <p>In order to do regrid the stellar parameters and find the best-fit model, I did the polynomial fitting of a combined P(Teff, log(g)). The original steps of P(Teff, log(g)) before the regridding is 50 K in Teff and 0.25 in log(g/(cm/s^2)), respectively.<br/>  <br/> Example:<br/> Simulation spectrum: Teff=7245K, log(g)=3.62, Z=-0.2, <span class="error">&#91;a/Fe&#93;</span>=0.25, r_mag = 15.0<br/>  <br/> Marginal probability distribution functions (PDF) along Teff and log(g). The original PDFs (blue) and polynomial fit (orange). The fitting was done only around the peak of the original PDF.<br/> <span class="image-wrap" style=""><a id="13932_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/13932/13932_Logg.png" title="Logg.png" file-preview-type="image" file-preview-id="13932" file-preview-title="Logg.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/13931/_thumb_13931.png" style="border: 0px solid black" /></a></span><span class="image-wrap" style=""><a id="13933_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/13933/13933_Teff_Logg.png" title="Teff_Logg.png" file-preview-type="image" file-preview-id="13933" file-preview-title="Teff_Logg.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/13932/_thumb_13932.png" style="border: 0px solid black" /></a></span><br/>  <br/>  <br/> The PDF contours of the original (black) and the polynomial fit (blue). The polynomial fitting of P(Teff, log(g)) finds the best-fit model at its peak (a blue star), although this stellar typing itself has a systematic offset from the input Teff and log(g).<br/> <span class="image-wrap" style=""><a id="13933_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/13933/13933_Teff_Logg.png" title="Teff_Logg.png" file-preview-type="image" file-preview-id="13933" file-preview-title="Teff_Logg.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/13933/_thumb_13933.png" style="border: 0px solid black" /></a></span><br/>  <br/>  </p> Blocks PIPE2D-374 Development Epic Link PIPE2D-303 Rank 0|zzs4wj:zzy Reviewers hassan Sprint 2DDRP-2021 A5 2DDRP-2021 A 6 Story Points 4.0