Description
Draft LSST Change Request (LCR) for the DPDD (LSE-163)
The following proposed changes are described in the comment below posted on Tue Mar 9 by Melissa Graham, and also in DMTN-151 and in this topic on Community.lsst.org.
In the DPDD, add these four rows to DIAObject Table (Table 3) along with the three footnotes.
- potentialHost, unit64[3], "Three extended Objects with lowest separations in Data Release database^FN1^."
- potentialHostSeparation, float[3], "Separations of potentialHost."
- potentialLowzHost, str[1], “External catalog name of the nearest low-z potential host^FN2^.”
- potentialLowzHostSeparation, float[1], “Separation of potentialLowzHost^FN3^.”
^FN1^Separations should be calculated with respect to the transient location using the second moments of each Object's luminosity profile, as described in DMTN-151.
^FN2^External catalog will be, e.g., the NGC/IC, unless the community provides one that they deem to be more scientifically useful, as described in DMTN-151.
^FN3^Separations will be radial offset in arcseconds unless a community-provided catalog includes galaxy characteristics that would enable an alternative, as described in DMTN-151.
Attachments
Issue Links
- is child task of
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DM-23683 Revise DIAObject <--> Object Associations
- Done
- is triggering
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- Done
- links to
- mentioned in
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Activity
There was one response from the community about the proposal to update the host association parameters was received, and it is favorable: https://community.lsst.org/t/host-galaxy-association-for-lsst-transients-request-for-comments/4812
Propose to call this RFC done and submit to the CCB exactly what is in the above description box.
Adopting this RFC, implementation proceeds in DM-29731
Melissa Graham Has this change made it to the released version of LSE-163 (so approved by project CCB). If so can you add a link to the project CCB decision and mark this ticket implemented?
Yes, sorry for the loose thread here Tim Jenness.
Implementation was tracked in DM-29731, and DPDD update version 3.6 contains the new host-related parameters for the DIAObject table.
The LCR was 2722, and it has been 'fully implemented' by the CCB: https://project.lsst.org/groups/ccb/node/4612
:+1: to this from me and Science Pipelines, assuming it hasn't diverged wildly from what was last discussed at SST.