History of PACS calibration file set releases

• The introduction of a non-linear coefficients calibration file, used in the non-linearity correction on PACS' signal.
• A new version of the bad pixel mask where the blue detector badpixel mask is extended by 3 pixels

Spectrometer

• A new calibration product containing a model for the telescope background has been introduced for flux calibration using the background normalization method.
• A correction of the error estimation of the capacitance of the blue spectrometer array.
• A new calibration product containing, at every key wavelength, the detector responses computed from the observation of astronomical standards.
• An update of the calibration sources flux product.

• The PACS photometer flux calibration has been re-derived. Absolute fluxes of point-sources will change by less than 5%, extended sources will change by 10-20%.
• Aperture photometry of point-sources requires from now on the application of new aperture correction factors, taking into account that there is still significant flux beyond 60 arcsec. These new correction factors (together with the old ones, applicable for PACS photometer observations calibrated with the old version of the Response calibration file in PACS calibration file set v16 or older) are stored in: "PCalPhotometer_ApertureCorrection_FM_v2.fits" and can be retrieved via the new task "photApertureCorrectionPointSource" to be applied after "annularSkyAperturePhotometry" in hipe 7.0 or later.
  Users of earlier versions of hipe can use the aperture corrections listed in the PACS photometer point-source flux calibration report, available at the PACS instrument page on the HSC web pages.
• Invntt calibration files, used in the madmap map making, updated to v4. Version 4 of Invntt contains the values of version 1, but in a new format needed by a software update.
• New calibration product: DetectorReadoutTimeShift. Currently not used in the pipeline processing.
• New calibration product: CoolerRecyclingTimes. Currently not used in the pipeline processing.

Spectrometer

• capacitance ratios updated, relevant for high flux source observations

• spatial calibration of chopped spectroscopy observations with large chopper throw
• wavelength calibration of spectroscopy in band B2B

• new version (G3) of inverse noise time-time correlation for MadMap

• Nominal response calibration:
  • Applying ground-orbit correction factors 1.1 and 1.3 is no longer needed with this version
  • Improved spaxel-spaxel flatfield

• updated CalSourceFlux - not used in the pipeline