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/PIPE1D-73 DRP 1D pipeline <p>Over the 400 galaxy spectra of the weekly run (PIPE2D 2023.28), the success rate felt from 94% to 64% since the April production (PIPE2D 2023.12).</p> <p>On the very first spectrum </p> <p><span class="image-wrap" style=""><img src="https://pfspipe.ipmu.jp/jira/secure/attachment/16144/16144_WR_20230710_spike_and_noise.png" style="border: 0px solid black" /></span></p> <p>there is an unflagged spike that is mistaken for an emission line. In addition the noise in the IR arm is a factor close to 10 higher than in the two other arms. </p> <p>The situation is similar in all spectra with a wrong redshift measurement. There is no specific redshift value for those values in error, which shows the problem seems to come from CR removal rather than from sky line subtraction.</p> PIPE1D-73

Feedback from the weekly run of July 10

Bug Normal Open Unresolved price vlebrun Tue, 11 Jul 2023 11:06:30 +0000 Wed, 12 Jul 2023 19:48:01 +0000 0 5 <p>no problem for the 13 quasars, the emission lines are strong enough  to dominate the residuals that can be seen in spectra</p> <p>The spurious line is indeed due to an unflagged CR. Here's fiberId=46, visit=1005 at 837.2nm:<br/> <span class="image-wrap" style=""><img src="https://pfspipe.ipmu.jp/jira/secure/attachment/16152/16152_pipe1d-79-image.png" width="700" style="border: 0px solid black" /></span></p> <p>Regarding the noise in the NIR, the simulated images were recently regenerated, which involved changes to how the NIR images were constructed. I believe I corrected the gains, but the read noise changed a lot (because it had previously been treated as a CCD, with a CCD-like read noise). I set the read noise to 20, which is similar to the 18 I found in <tt>camera.yaml</tt>, but there's some ambiguity in the units: the code treats it as electrons, but there's a comment that says it's ADU (and it makes a huge difference, because the gain is 9). We'll try to track down what the value should really be.</p> Development Rank 0|zzsynz: