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-461 DRP 2-D Pipeline <p>The choice of parameter resolutions is a trade-off between computing/storing costs and an accuracy of flux calibration. Before making interpolations of AMBRE model templates, the resolutions are need to be determined. The resolutions are determined based on an accuracy in photometric typing of stars.</p> PIPE2D-461

Determine parameter resolutions of interpolated AMBRE models

Task Normal Done Done Takuji Yamashita Takuji Yamashita flux-calibration model-templates Thu, 3 Oct 2019 08:02:49 +0000 Mon, 11 Nov 2019 20:59:19 +0000 Mon, 11 Nov 2019 02:07:41 +0000 0 3 <p><a href="https://pfspipe.ipmu.jp/jira/secure/ViewProfile.jspa?name=hassan" class="user-hover" rel="hassan">hassan</a> Could you move this ticket and the blocked ticket <a href="https://pfspipe.ipmu.jp/jira/browse/PIPE2D-365" title="Interpolate between model templates " class="issue-link" data-issue-key="PIPE2D-365"><del>PIPE2D-365</del></a> to Sprint I?</p> <p>I decided to make interpolation spectra at parameter resolutions of delta_Teff = 50 K, delta_logg = 0.25, delta_<span class="error">&#91;Fe/H&#93;</span> = 0.25, and delta_<span class="error">&#91;alpha/Fe&#93;</span> = 0.2. Therefore, I will divide the current parameter grids by five and 2 along Teff and log(g), respectively. Those of <span class="error">&#91;Fe/H&#93;</span> and <span class="error">&#91;alpha/Fe&#93;</span> do not change.</p> <p> <br/> We require that a resolution of each parameter (step) is less than an equivalent change of a parameter to a 0.01 mag (=1%) of a color. 1% corresponds to the uncertainty in HSC photometries. <br/> The original steps of parameters are 250 K, 0.5, 0.25 - 1, and 0.2, in Teff, log(g), <span class="error">&#91;Fe/H&#93;</span>, and <span class="error">&#91;Alpha/Fe&#93;</span>, respectively. <br/>  <br/> Synthetic colors, g-r and r-i, of AMBRE model templates with 6000K &lt; Teff &lt; 8000 as a function of each parameter (Teff, log(g), <span class="error">&#91;Fe/H&#93;</span>, <span class="error">&#91;Alpha/Fe&#93;</span>) are shown in the figures.<br/> Four parameter sets are over-plotted (black lines). They are extreme cases in each parameter. <br/>  <br/> <span class="image-wrap" style=""><a id="12234_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12234/12234_syntheticcolor_logg.png" title="syntheticcolor_logg.png" file-preview-type="image" file-preview-id="12234" file-preview-title="syntheticcolor_logg.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12235/_thumb_12235.png" style="border: 0px solid black" /></a></span><span class="image-wrap" style=""><a id="12231_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12231/12231_syntheticcolor_Z.png" title="syntheticcolor_Z.png" file-preview-type="image" file-preview-id="12231" file-preview-title="syntheticcolor_Z.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12234/_thumb_12234.png" style="border: 0px solid black" /></a></span><br/> <span class="image-wrap" style=""><a id="12233_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12233/12233_syntheticcolor_alpha.png" title="syntheticcolor_alpha.png" file-preview-type="image" file-preview-id="12233" file-preview-title="syntheticcolor_alpha.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12231/_thumb_12231.png" style="border: 0px solid black" /></a></span><span class="image-wrap" style=""><a id="12232_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12232/12232_hist_steps.png" title="hist_steps.png" file-preview-type="image" file-preview-id="12232" file-preview-title="hist_steps.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12233/_thumb_12233.png" style="border: 0px solid black" /></a></span><br/>  <br/>  <br/> The parameter changes corresponding to 0.01 mag for the four cases are roughly 50 K (Teff), 0.25 (log(g)), 0.6 (<span class="error">&#91;Fe/H&#93;</span>), and 2 (<span class="error">&#91;alpha/Fe&#93;</span>). <br/>  <br/> <span class="image-wrap" style=""><a id="12232_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12232/12232_hist_steps.png" title="hist_steps.png" file-preview-type="image" file-preview-id="12232" file-preview-title="hist_steps.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12232/_thumb_12232.png" height="110" width="595" style="border: 0px solid black" /></a></span><br/> Fig: Parameter changes corresponding to a 0.01 mag color change. Only the 4 cases are shown.<br/>  <br/>  </p> <p>If you have any comments, please let me know. I will make a parameter list table with these resolutions and then I will run an interpolation process for all the parameter grids. </p> <p>The interpolation process for all the parameter grids will be done in the main ticket.</p> Blocks PIPE2D-365 Development Epic Link PIPE2D-303 Rank 0|02qpt6:508yl0chzzy0000pc Reviewers hassan Sprint 2DDRP-2019 H 2DDRP-2019 I Story Points 4.0