possible multi obs pipeline

[raphaelshirley]

I had the idea to write a new pipeline based on 3b:

step3b1:
   subset:
     #- mergeDetections #merge detections removed 
     - deblend
     - vircamMeasure
     - mergeMeasurements
     - forcedPhotCoadd
     - writeObjectTable
     - transformObjectTable
     - consolidateObjectTable
     - healSparsePropertyMaps
   description: |
    Smaller pipeline

The debate is what coadd detections to merge. Three possibilities:

• LSST only. take the merged LSST bands and force them on VISTA (My preferred baseline)
• LSST plus VISTA. merge the bands from LSST and VISTA and meaasure on both VISTA and LSST. This would allow objects detected in VISTA only to get measurements but these are rare and most people just want a VISTA measurement for LSST options
• VISTA only. Get a seperate set of objects detected in VISTA. This might have some use cases

[raphaelshirley]

The idea is that instead of doing the mergeDetections task you just ingest the LSST merged detections. The complication is can you do that using the obs_lsst lsstCam instrument?