Difference: HipeWhatsNew10x (32 vs. 33)

Revision 332012-12-06 - PierreRoyer

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META TOPICPARENT name="HipeWhatsNew"
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  • 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.
  • New useful script for point source correction.
Changed:
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  • Improvements in the flatfielding:
    • Fixed flux conservation problem in some cases with background normalization in specFlatFieldRange.
    • Switched to linear fitter in specFlatFieldLine.
    • Improved line flux conservation in cases of low continuum.
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  • 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.
Changed:
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  • Some simplifications in the ipipe scripts.
  • Drizzle works now also with sliced products.
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  • 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.
  • Spectral drizzling is now offered for the line-scan observations (ChopNodLineScan, UnchoppedLineScan). Narrow wavelength ranges can be extracted from range-scans and fed in the drizzling as well. For this, use the new crop tasks described above
 
  • 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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Photometry

Spectroscopy

  • In order to be less sensitive to (on average) mispointed flux calibration observations, the flux calibration scheme has changed: the construction of the calibration tables is now based on the standard calibrators fluxes coming from the central 9 spaxels instead of the central one only. This implies that two new calibration tables were introduced in the calibration tree, namely observedResponse3x3 and calSourceFlux3x3. Those tables are used by default in specDiffCs and should lead to more reliable fluxes, notably in case of mispointed observations. An optional parameter, use3x3 (True by default), was added to specDiffCs. You can still use the former calibration scheme by setting use3x3 to False although it is not recommended.
Added:
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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.
 

Analysis tools

Photometry

 
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