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  1. Data Management
  2. DM-22027

Re-make Gaia refcat to fix epoch

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    Details

    • Type: Bug
    • Status: Done
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: meas_algorithms
    • Labels:
      None
    • Templates:
    • Story Points:
      1
    • Epic Link:
    • 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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          Issue Links

          is triggered by

          Story - Created by Jira Software - do not edit or delete. Issue type for a user story. DM-21782 Move Gaia DR2 refcat to gaia_dr2_20190808

          • Done
          relates to

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. DM-19473 Create Gaia DR2 reference catalog

          • Done

          RFC - An issue whose primary purpose is to advertise an intent and allow stakeholders to comment. RFC-634 Add Gaia DR2 catalog to lsst-dev:/datasets/refcats

          • Implemented

            Activity

              People

              • Assignee:
                Parejkoj John Parejko
                Reporter:
                Parejkoj John Parejko
                Reviewers:
                Paul Price
                Watchers:
                John Parejko, John Swinbank, Paul Price, Siegfried Eggl, Yusra AlSayyad
              • Votes:
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                5 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Summary Panel