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  1. Data Management
  2. DM-22027

Re-make Gaia refcat to fix epoch

    Details

    • Type: Bug
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: meas_algorithms
    • Labels:
      None
    • Templates:
    • Story Points:
      1
    • Sprint:
      AP F19-5 (October), AP F19-6 (November)
    • Team:
      Alert Production

      Description

      Siegfried Eggl just pointed out to me that the time epoch expressed in the gaia catalog are given in TCB, not UTC as I had thought. This results in a ~50s systematic offset of all of the epochs (all Gaia DR2 epochs are J2015.5). Although 50s probably doesn't matter for LSST parallax/PM calculations (which we're not doing yet anyway), it's easy enough to fix the ingest config and re-process the data. I can set that to run this weekend.

      While I'm at it, I will correct the meas_algorithms "how to make a refcat" guide to have the updated config too.

      Once it's generated and on lsst-dev, I'll have to re-request permission to copy it into place. Since the catalog is so new, I'll just overwrite the existing one entirely.

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              • Assignee:
                Parejkoj John Parejko
                Reporter:
                Parejkoj John Parejko
                Reviewers:
                Paul Price
                Watchers:
                John Parejko, John Swinbank, Paul Price, Siegfried Eggl, Yusra AlSayyad
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                  Updated:
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