Uploaded image for project: 'Data Management'
  1. Data Management
  2. DM-30490

Add delta-magnitude check to AstrometryTask

    XMLWordPrintable

    Details

    • Type: Story
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: meas_astrom
    • Labels:
      None

      Description

      Recent investigations in DM-30466 shows that one of the (more common?) failure modes in the astrometry fitting is erroneous matching between source and reference objects of incompatible magnitudes.

      As discussed on that ticket, one of the challenges of a magnitude-based selection is that we don't have a zeropoint yet. However, we do have a match between source and reference objects. Therefore, it should be possible to compute an effective zeropoint. My suggestion is to compute -2.5*log10(src_flux) + 2.5*log10(ref_flux) and perform a configurable n-sigma cut about the mean/median when doing outlier rejection.

      This will obviously require some significant testing on RC2 and DC2 data to ensure that nothing breaks.

        Attachments

          Issue Links

            Activity

            erykoff Eli Rykoff created issue -
            tjenness Tim Jenness made changes -
            Field Original Value New Value
            Team Data Release Production [ 10301 ]
            lauren Lauren MacArthur made changes -
            Link This issue relates to DM-30657 [ DM-30657 ]
            erykoff Eli Rykoff made changes -
            Summary Add delta-magnitude check to matchPessimisticB Add delta-magnitude check to AstrometryTask
            erykoff Eli Rykoff made changes -
            Status To Do [ 10001 ] In Progress [ 3 ]
            erykoff Eli Rykoff made changes -
            Reviewers John Parejko [ parejkoj ]
            Status In Progress [ 3 ] In Review [ 10004 ]
            Parejkoj John Parejko made changes -
            Status In Review [ 10004 ] Reviewed [ 10101 ]
            erykoff Eli Rykoff made changes -
            Resolution Done [ 10000 ]
            Status Reviewed [ 10101 ] Done [ 10002 ]
            lauren Lauren MacArthur made changes -
            Link This issue relates to DM-30943 [ DM-30943 ]
            erykoff Eli Rykoff made changes -
            Epic Link DM-30471 [ 509196 ]
            Story Points 3
            lauren Lauren MacArthur made changes -
            Remote Link This issue links to "Page (Confluence)" [ 34045 ]

              People

              Assignee:
              erykoff Eli Rykoff
              Reporter:
              erykoff Eli Rykoff
              Reviewers:
              John Parejko
              Watchers:
              Chris Walter, Eli Rykoff, James Chiang, Jim Bosch, John Parejko, Lauren MacArthur
              Votes:
              0 Vote for this issue
              Watchers:
              6 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

                  Jenkins

                  No builds found.