Pixelmaps%20and%20weights

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Pixelmaps and weights
Astro-Wise workshop, november 2005
Ewout Helmich

• Which pixelmaps (pixel values 1 or 0) are
  created?
• HotPixelMap
• ColdPixelMap
• SaturatedPixelMap
• SatelliteMap
• CosmicMap
• Pixelmaps as masks 1 good pixel, 0 bad pixel

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Where are pixelmaps used?

• DomeFlatFrame normalize
• TwilightFlatFrame normalize
• MasterFlatFrame normalize, masking
• FringeFrame masking (during scaling)
• NightskyFlatFrame normalize
• SatelliteMap masking
• CosmicMap masking
• WeightFrame masking

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Weights

• Weights are the flat-field, where bad pixels have
  weight 0
• These are inverse variance maps
• 3 weights for possible end products
• Weight of ReducedScienceFrame
• Weight of RegriddedFrame (Swarp resampled weight)
• Weight of CoaddedRegriddedFrame (Swarp resampled
  weight)