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  1. Data Management
  2. DM-9046

Filter characterisation for SNIa cosmology


    • Team:
      DM Science


      At the DESC meeting this summer (2016), Nicolas Regnault showed in the Photometric Corrections session that in order for LSST SNIa cosmology not to be systematics limited, the nominal "edge" of the filters, and the evolution thereof, needs to be known to and monitored at the 0.1nm level.

      This is a somewhat surprising result (to some at least), and imposes some very stringent requirements on the photometric calibration system.

      There is currently nothing in the SRD stating that we need knowledge of the filters at this level so this putative requirement is not being flowed down to the design in LDM-151.

      This ticket is for someone to decide if a change to the requirements is necessary as this will likely involve making hardware change requests, given the current plans for filter and photometric calibration hardware.

      A link to the slides can be found here:



          Issue Links


            mfisherlevine Merlin Fisher-Levine created issue -
            swinbank John Swinbank made changes -
            Field Original Value New Value
            Link This issue relates to DM-8066 [ DM-8066 ]
            mjuric Mario Juric made changes -
            Labels dm-sst
            mjuric Mario Juric made changes -
            Assignee Mario Juric [ mjuric ] Robert Lupton [ rhl ]
            swinbank John Swinbank made changes -
            Team Project Science [ 11800 ] DM Science [ 12218 ]
            lguy Leanne Guy made changes -
            Risk Score 0
            lguy Leanne Guy made changes -
            Remote Link This issue links to "Page (Confluence)" [ 18031 ]
            lguy Leanne Guy made changes -
            Rank Ranked higher
            ctslater Colin Slater made changes -
            Remote Link This issue links to "Page (Confluence)" [ 20969 ]
            wmwood-vasey Michael Wood-Vasey made changes -
            Attachment calibration_impact_forecast.pdf [ 39129 ]


              • Assignee:
                rhl Robert Lupton
                mfisherlevine Merlin Fisher-Levine
                Colin Slater, Johann Cohen-Tanugi, John Swinbank, Leanne Guy, Merlin Fisher-Levine, Michael Wood-Vasey
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                • Created:

                  Summary Panel