Standard Data Products

The set of data products for PHT32 is significantly larger than for the previous ones:

• a set of 7 numbers for each chopper plateau, of each pixel, at each spacecraft pointing position and for each filter:
  1. signal
  2. uncertainty;
  3. AOT time coordinate;
  4. offset in vignetted field of view in Y;
  5. offset in vignetted field of view in Z;
  6. internal signal flag;
  7. internal pointing flag.
• average of all data sampled at a given sky position,
• a map of averaged data is provided.
• per filter, for each detector and each spacecraft fine-pointing:
  1. a single small strip scan uniformly sampled (at oversampled sub-multiples of the pixel repeat distance in the array) along the path of the focal plane chopper in focal plane coordinates with 1/f noise removed, but with no absolute photometric information for the baselevel of the scan
  2. the relative photometric uncertainty between points in the strip scan
  3. an estimate for the absolute baselevel of the strip scan
  4. the uncertainty in 3) (will include the effects of 1/f noise and will be greater than the relative photometric uncertainty in the strip scan)
  5. for each detector pixel: focal plane coordinates of each point in the strip scans (will be the same for each spacecraft pointing position)
• per filter, the nominal sky positions
• per filter and for each spacecraft scan leg, i.e. for each Y column of detectors in the focal plane array:
  1. a single strip scan uniformly sampled along Y with 1/f noise removed, but no absolute photometric information on the baselevel
  2. a set of weights for the strip scan
  3. an estimate for the absolute baselevel of the strip scan
  4. a statistical uncertainty in 3)
• per filter:
  1. a 1 dimensional scan or a 2 dimensional image in Y and Z coordinates in internal units
  2. a 1 dimensional scan a 2 dimensional image in astronomical brightness units such as Jy per steradian and gridded in astronomical coordinates
• 1 dimensional scans or 2 dimensional images in astronomical co-ordinates in astronomical brightness units such as Jy per steradian for each selected filter
• 1 dimensional colour profiles or 2 dimensional colour images in astronomical co-ordinates. (If the unit of the original maps is Jy per steradian the values of the resulting colour map will be simple numbers without any unit.)