scene_block_name: M51 DSS1
spectrum:
  type: constant-flux
geometry: 
  type: from-FITS-image
  filename: m51_dss1.fits
  diagonal_fov_arcsec: 3.0
  background_to_subtract: mode
nphotons: 1E7
apply_seeing: False
apply_atmosphere_transmission: False
render: True