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  1. Request For Comments
  2. RFC-339

Accept report on impact to DM of LCR-835 (heterogeneous focal plane)

    Details

    • Type: RFC
    • Status: Implemented
    • Resolution: Done
    • Component/s: DM, TCT
    • Labels:

      Description

      An RFC to accept the Slater et al. report about the effects of the acceptance of LCR-835, the baselining of a heterogeneous focal plane.

      Abstract: The LSST heterogeneous focal plane is a potential source of false detections in image differencing due to difference between vendors in the sensor quantum efficiencies as a function of wavelength. We can evaluate the magnitude of this effect in a worst-case scenario (with no attempt at correction) by estimating the flux difference that would be measured between sensors, for a variety of stellar SEDs, and combining this with the expected density of sources at a given color and the probability that they will exceed the 5σ detection threshold as a result of the measurement difference. Overall the sensor differences are small enough that only negligible numbers of false detections will result, but we note that the specifications for the filter transmission curve currently permit a level of spatial variations that could lead to a significant number of false detections

      Following acceptance of this report, it will be posted to the CCB at https://project.lsst.org/groups/ccb/node/1537. It has been reviewed by Mario Juric, Robert Lupton, and presented to the PST.

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            Hide
            ctslater Colin Slater added a comment -

            All fixes made as per Tim Jenness's request. Repository is now at https://github.com/lsst-dmsst/LDM-523.

            Show
            ctslater Colin Slater added a comment - All fixes made as per Tim Jenness 's request. Repository is now at https://github.com/lsst-dmsst/LDM-523 .
            Hide
            mjuric Mario Juric added a comment -

            This RFC has been considered by the DMLT (convened as the TCT) on 2017-05-11, and accepted with minor editorial changes. Document handle LDM-523 has been assigned to this report.

            The accepted version has been uploaded as ldm-523-3ce104d8ba7c4251d6f937c4fec9a90db5e451e6.pdf

            Show
            mjuric Mario Juric added a comment - This RFC has been considered by the DMLT (convened as the TCT) on 2017-05-11, and accepted with minor editorial changes. Document handle LDM-523 has been assigned to this report. The accepted version has been uploaded as ldm-523-3ce104d8ba7c4251d6f937c4fec9a90db5e451e6.pdf
            Hide
            mjuric Mario Juric added a comment -

            Tim Jenness, leaving it up to you to finalize the process (docushare uploads, preferred version, etc.).

            PS: Can you also link the doc to Collection-5523, and post it as DM's response to https://project.lsst.org/groups/ccb/node/1537?

            Show
            mjuric Mario Juric added a comment - Tim Jenness , leaving it up to you to finalize the process (docushare uploads, preferred version, etc.). PS: Can you also link the doc to Collection-5523 , and post it as DM's response to https://project.lsst.org/groups/ccb/node/1537?
            Hide
            tjenness Tim Jenness added a comment -

            Yes. I will need push access to the repo (I doubt I'm in the admin group for lsst-dmsst github org to be able to add myself to the repo).

            Show
            tjenness Tim Jenness added a comment - Yes. I will need push access to the repo (I doubt I'm in the admin group for lsst-dmsst github org to be able to add myself to the repo).
            Hide
            mjuric Mario Juric added a comment -

            Tim Jenness: oops, you're right – added you as owner. Also added Frossie Economou (think it's good for SQuaRE to have access to all our Orgs).

            Show
            mjuric Mario Juric added a comment - Tim Jenness : oops, you're right – added you as owner. Also added Frossie Economou (think it's good for SQuaRE to have access to all our Orgs).

              People

              • Assignee:
                tjenness Tim Jenness
                Reporter:
                mjuric Mario Juric
                Watchers:
                Colin Slater, Eric Bellm, Mario Juric, Simon Krughoff, Tim Jenness, Wil O'Mullane
              • Votes:
                0 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:
                  Planned End:

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