nominal BGS TS

[changhoonhahn]

Omar pointed out a number of issues with the nominal BGS target selection based on the latest DR9 imaging.

• There are significant differences between the nominal BGS cuts in the north and south. The cuts remove significantly more objects in the north than in the south.

  • Do we want different cuts for the north and the south?

• The large galaxy mask and quality cuts remove a significant fraction of objects are in GAMA. For example, >70% of objects removed by FRACIN QC are GAMA objects. Meanwhile, they only contribute ~25/deg^2.

  • For SV do we want to relax the quality cuts for all target classes?
  • Do we want to relax the cuts for the nominal TS?

Based on Omar's update in 10/23/2020 BGS telecon