<-- ANALYTICS CODE - DO NOT EDIT -->

<-- Google Analytics script BEGIN -->

<-- Google Analytics script END -->

<-- END OF ANALYTICS CODE -->

What's coming up in HIPE 14

• Updates to high level products: Photometry level 2.5 and the creation of the Spectroscopy levels 2.5 and 3 (not really products but tables of spectra).
  • Photometer: Maps of solar system objects have been created for this version.
  • Spectrometer: Tables of spectra in level 2.5 and 3, as mentioned above.

• New spectroscopy calibration for extended sources which also works for off-centre point sources. New beam calibration and background model.
• New useful and analysis scripts to account for these calibration changes (beam and background related).

• FTS

PACS

Pipeline

Photometry

• Level2.5 products:
  • Unimap and Jscanam maps are now generated for Solar System Objects, from combined scan and cross-scan observations.

• SPG scripts:
  • The range scan observations are now flatfielded: using the spline fitting method for ranges longer than 5 microns, and using the line scan flatfielding for the shorter ranges
  • The interpolated cubes are no longer produced for oversample range scan mapping observations, and they also have a smaller spaxel size of 3" (rather than 4.7" before).

Calibration

Photometry

Spectroscopy

• There is a new Extended Source Correction calibration file (ExtendedSourceLoss, used in the pipeline tasks specRespCal and specRespCalToTelescope) which produces a better spatial flatfield for the PACS spectrometer. The fluxes of the spaxels of all cubes will be increased by ~30% in the blue to a decrease of ~5% in the red. The calibration file can be inspected to extract the curve:

  w = calTree.spectrometer.extendedSourceLoss["wavelength"].data
  f = calTree.spectrometer.extendedSourceLoss["fraction"].data
  
  

• For point sources calibrated with extractCentralSpectrum, this extended source correction is taken out before the point source corrections are computed. However, if working with off-centred point sources and using the tasks extractSpaxelSpectrum and pointSourceLossCorrection, this correction is not taken out, and hence the results will be incorrect. An extra task/function is necessary: to get this, raise a helpdesk ticket.
• New Beam calibration files have been delivered, differing from the previous files only in the way they are normalised. These will be used in a new task being developed in HIPE 15, and do not impact on HIPE 14 or SPG 14 in any way.

• A slightly updated telescope background model for use in the Pointing Offset Correction pipeline script for point sources has been developed. This update is to allow better consistency between the "POC" script and the default pipeline script "Telescope normaliation", for chopNod AOTs. The changes are at the percent level and largest in band B3A.

Analysis tools

Photometry

• The PhotometryConvolveResolution Kernel script was added within the PACS Useful Script section. This script convolves and regrids a map at a certain wavelength to the PSF of another map at longer wavelength, by using an appropriate kernel.

Spectroscopy

• A new script has been provided to allow users to plot the telescope background spectrum model. The code and necessary files are provided on http://herschel.esac.esa.int/twiki/bin/view/Public/PacsCalibrationWeb?template=viewprint (PACS Spectrometer Calibration section).

Product changes

Photometry

• The error layer within Unimap Level 2.5 products is renamed as stdDev, being the standard deviation computed at every sky pixel with respect to the samples that are falling on it. It can be properly assumed as the error map only if associated to the Naïve map.

Spectroscopy

• Interpolated cubes: Cubes produced by the task specInterpolate now have a spaxel size of 3".
• Interpolated cubes: Are no longer provided for oversampled mapping observations.