Difference: HipeWhatsNew10x (52 vs. 53)

Revision 532013-02-08 - KatrinaExter

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META TOPICPARENT name="HipeWhatsNew"
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  • There is a new task pacsExtractSpectralRange to spectrally crop a (Sliced)PacsCube or (Sliced)PacsRebinnedCube.
  • The footprint of pointed observations is shown by projecting the rebinned cubes on a finer grid (0.5 arcsec pixelsize).
Changed:
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  • There is a new mask OUTOFBAND which masks the data at wavelengths where the signal is completely blocked by the used filter.
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  • There is a new mask OUTOFBAND which masks the data at wavelengths where the signal is completely blocked by the filter (i.e. for when your wavelength range was set in the red, leading to an out-of-band wavelength range in the blue).
 
  • Slices which are completely masked by this OUTOFBAND mask are discarded during the level-0.5 processing.
  • Spectra are now by default rebinned to a standard wavelength grid, so that we avoid incompatible wavelength grid when subtracting on and off spectra from different observations.
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  • New useful script for point source correction.
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  • New useful script for point source flux loss correction.
 
  • Spectral flatfielding: several issues had been reported for the specific case of zero or weak continuum in specFlatFieldLine and specFlatFieldRange (e.g. non-central spaxels). These were fixed.
  • One can now slice the level-0 data with pacsSpecSliceLevel0 to reduce the memory consumption of the processing till level-0.5.
  • Most of the ipipe scripts have been slightly simplified. Mainly, selectSlices has been removed: all tasks can cope with sliced products transparently, so selectSlices is optional.
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  • Fixed some wrong values of the 'onOffSource' meta keyword.
  • Fixed some inconsistencies in the units and labels of the pipeline products.
  • Added the missing keyword 'faintLines' to the observation context.
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  • For the background normalisation pipeline there is a new correction for telescope temperature and ageing, with a new calibration based on the analytical telescope model.
  • Task extractCentralSpectrum to extract the spectrum of a point source in the central spaxel, corrected for the PSF and pointing offsets. The corrections for the PSF is necessary, the others are optional. For line+short range scan AOTs the recommended correction is a median over wavelength, for range and SED AOTs we recommend the wavelength dependent correction.
  • Browse products (and the Level 2 SpectralSimpleCubes [projected cubes] they come from) are created by the pipeline task specProject with very small spaxel sizes (1") for non-mapping observations: with this you can still make out the original spaxels, but with a regular sky WCS.
 

Calibration

Photometry

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  • As a result of the new calibration scheme, the absolute fluxes found at level 2 are slightly reduced.
    • For extended sources, the new calibration is more accurate
    • The new calibration should not impact point sources, thanks to the so-called "central to 3x3" correction performed in extractCentralSpectrum. That correction was not necessary in hipe 9.0, as it was implicitly contained in the flux calibration files. In hipe 10, by default no average mis-pointing is included in the calibration files anymore, hence this extra correction, making use of the flux distribution between the spaxels to estimate the mispointing and correct for it.
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  • New versions of the calfiles ObservedResponse and CalSourceFlux released (cal set 44)
  • There is a calibration set update for the Telescope Background product (45) used in the Background Normalisation ipipe script
 

Product changes

Photometry

 
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