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What's new in version 14.x

PDF Version Click here

Help Interested in what's new for other versions of HIPE? See this page for links to all the What's New documents from HIPE 4.0 onwards.
See also the HIPE known issues and the Data products known issues pages for last-minute information on known problems.


Highlights

Core

  • Now you can pass arguments to scripts in batch mode (former jylaunch).
  • New Quick Analysis perspective allows GUI download of products and processing all within HIPE.
  • New Auxiliary Observation Summary Product with information about the observation in a simple dataset.
  • Quality flags have been reorganised.
  • SVV resets and STR switch-overs are now handled by auxiliary processors in the generation of the pointing product. Fixes for early ODs (<= 113) added in HIPE 14.1.

HIFI

  • New in 14.1 Update of sideband ratio in bands 1 to 4 - note that this will imply changes in the intensities in all concerned bands.
  • New in 14.1 Introduction of a new calibration output providing a frequency-dependent intensity calibration uncertainty budget.
  • Provision of spur channel flags for all modes (was limited to spectral scan up to HIPE 13).
  • Changes to the output of the Deconvolution task.
  • New parameters for the removal tasks and updated functionality for identifyLines.
  • Legacy quality documentation.
  • From 14.1 onwards:
    • FitBaseline has been upgraded to properly deal with channels holding negative fluxes in the masking, and to not honour the informative SPUR_WARNING flags.
    • mkRms has been upgraded to not honour the informative SPUR_WARNING flags.
    • The issues with the 14.0.1 products whereby the mean and median statistics products were erroneously set to 0 has been fixed.
    • Some relevant meta-data that were missing in cubes generated with 14.0.1 have now been added to the product headers.

PACS

  • Spectroscopy calibration
    • 14.0: a new Extended Source Calibration (ESCF) is released: fully extended sources are now better calibrated, and for point and semi-extended sources treated with their dedicated tasks there is no change as the ESCF is taken out before the point/semi-extended correction is applied. Sources that lie between fully extended and a point, and point or semi-extended sources that are not processed with the dedicated tasks, will have slightly incorrect fluxes--at most wavelengths the fluxes will in fact be _over_corrected by the ESC. A "forward modelling" tool will be release in HIPE 15 to help users estimate the correct fluxes.
    • 14.0: drizzled cubes have a dedicated calibration and pipeline, and produce correct fluxes (a vast improvement on previous releases).
    • 14.2: a new spatial calibration (spaxel sizes and layout) has been released. There are slight differences from the one used previously. The flux distribution in mosaic cubes (interpolated, projected, drizzled) will change as a result.
    • The calibration tree update released for 14.2 includes a new RSRFR1 calibration file that can be used with the interactive pipelines to produce data in the red leak (>190 micron) region.
  • Spectroscopy and photometer products
    • Note that in some cases the level2.5 and level3 products have been produced with a higher version of 14 than the level0 to level2 processing.
  • Spectroscopy products
    • 14.0: spectrum tables have been added to the higher levels and the standalone browse products.
    • 14.2: for unchopped range scans, the on-source and the background subtracted on-source products (i.e. on-off) both are provided in the standalone browse products.
    • 14.2: interpolated cubes have an error array.
    • 14.2: for all observations, data below 55 microns and above 190 microns are excluded.
  • Photometer products
    • Level 2.5 maps of solar system objects have been created for 14.0 and 14.2.
    • 14.2: Unimap mapper has been upgraded to version 6.4.4.
SPIRE
  • New in 14.1 Major impact: SPIRE Spectrometer extended source calibrated spectra are corrected for the far-field feedhorn efficiency. The correction leads to systematic ~40% higher intensities for SSW and ~40-100% for SLW. All extended source calibration products - spectra or spectral cubes - are affected by this significant effect. With this correction the extended source calibrated SPIRE Photometer and Spectrometer products are in good agreement.
  • Correction for artefacts in SPIRE Spectrometer Low Resolution (LR) point source calibrated spectra.
  • The default SPIRE Spectrometer spectral cubes are now produced with the convolution projection (CP) method: the browse images/thumbnails and standalone browse products are now the CP cubes.
  • In HIPE 14.1, the SPIRE Spectrometer bright mode calibration was fixed.
  • In HIPE 14.2.1, the mosaicked SPIRE Photometer Level-3 maps are correctly calculated.
  • Note that in some cases the level2.5 and level3 products have been produced with a higher version of 14 than the level0 to level2 processing.

NOTE: Highlights with a version number in bold represent a change from version 14.0.

Core system

HIPE

Editors & Viewers

Default editor

The default editor for every type of data, which is the one used when double clicking on a variable, is preserved regardless the editors opened through the Open With menu.

The previous behaviour, which is to use the last opened editor as the default, can still be set, by means of a new preference in the Editors & Viewers category.

Recent open files

The size of the recently opened files list, which can be accessed through the File menu, is now configurable through preferences.

Metadata tables

A new option in the popup menu of metadata tables allows copying cell values in other way than with the usual key combinations (Ctrl+C or Cmd+C).

Array data viewer

The array data viewer shows tooltips over the spinners (above the data table) for informing about the array dimensions.

Quick Analysis

There is a new perspective in HIPE, which is accessible by clicking on the magnifying glass at the top right toolbar, for quickly inspecting scientific data from the Herschel Science Archive.

Observations can be searched by target name, observation id, operational day or Ra/Dec.

When clicking on an observation, its standalone browse products are opened in the editor area for quick analysis, by means of the image, spectra or cube viewers.

Opening the observation context instead is also possible, either with the popup menu or by configuring so as the default behaviour, in the Quick Analysis preferences category.

Command line

It is now possible to pass arguments to HIPE from the command line, which will be tried to be interpreted as files to be opened with the proper viewers. For example:

bash> hipe myImage.jpg cube.fits resultTable.csv

would open HIPE with three viewers: one for the image, a spectrum explorer for the cube, and a dataset viewer for the CSV table.


ALERT! Note:

Passing a Jython script as the first argument will still behave as running HIPE in batch mode:

bash> hipe myScript.py arg1 arg2

would not open the HIPE window, but execute the script with the given arguments passed to it.

Console

There are interesting enhancements in the Console view with HIPE 14.0:

  • Text edit options (cut/copy/paste) are available not only by the usual key combinations, but also with the popup menu.
  • Autocompletion through the tab key has been tremendously improved in this release, making Jython coder's life much easier.
  • The console built-in help, shown with help, is now more practical and understandable.

Plotting

TablePlotter

OverPlotter

Dataset viewer

Astronomical utilities

  • Special corrections in pointing products to handle S/C operational events have been included in the auxiliary processors. Namely, the corrections are:
    • STR switch-overs, i.e. changes from the usually prime star-tracker (STR1) to the backup unit (STR2)
    • Reset of the Spacecraft Velocity Vector (SVV) that is used by the STR to compute the aberration correction of the coordinates of guide stars. For more information please refer to the the dedicated section in the Spacecraft and Observatory pages.
    • It has been found that the STR misalignment was not properly handled in early ODs (<= 113) and has been fixed. (see SPR HCSS-20990). However, some issues still exist for a small set of SPIRE parallel observations in OD 111 (investigation on-going).
  • Now up to 18 stars are now included in the computation of the gyro-based attitude reconstruction, whenever available in TM (in the previous release, only up to 9 stars were included).
  • New in HCSS 14.2: the gyro-based attitude reconstruction algorithm has been modified in order to in order to allow switching the logic used when estimating the star vector measurement error during the star tracker attitude calculations. As a general rule, the estimate of error used in QUEST measurement model should be as realistic as possible (for each observation -- see SPR HCSS-19267). However, in some cases this leads to wrong attitude estimates so it has been enabled a feature to switch between the variable error estimate and the original assumption of a constant error value for all star vector measurements.

Numeric routines

Data fitting

Data interpolation

Random numbers

Statistics

Trend analysis

Mapping

Other functions

Source extraction

  • Improved error reporting for bad inputs.

Images

  • When requesting the unit, the FITS compatible unit is returned.
  • The naxis keywords are not longer duplicated in the fits header.
  • The Wcs ia added to all datasets of the images (like the stddev, ...).

Display

  • Added shortcuts to some of the task directly in the image viewer.

Analysis

Spectra

Display

Analysis

Data cubes

  • When requesting the unit, the FITS compatible unit is returned.
  • The naxis keywords are not longer duplicated in the fits header.
  • The Wcs ia added to all datasets of the images (like the stddev, ...).

Display

  • Added shortcuts to some of the task directly in the image viewer.
  • A new viewer has been introduced to explore ParameterCube products which contain the results of the spectrum fitter on spectral cubes.
  • Several improvements to the cube tools of the spectrum explorer:
    • Tooltips added to task selection drop down menu.
    • Improved the spatial selection for the crop task.
    • Fixed some problems with displaying cubes when there is little space for the spectrum explorer, e.g. when it is embedded in the observation context viewer.

Analysis

Herschel Science Archive

Calibration sources

Products and datasets

A new Auxiliary Observation Summary Product which can be retrieved using the tag LATEST_OBSERVATION_SUMMARY_PRODUCT. This product contains one dataset with a summary of information for each observation. Useful methods exist for querying the data as documented here: ObservationSummaryProduct

Observation context

A new Calibration Table Product exists under the Auxiliary Context in each Observation Context. This product contains calibration tables data for the given instrument including exactly how the hardware was configured, hard limits, soft limits etc. This provides valuable information for the long term completeness of an observation. Useful methods exist for querying the table data as documented here: SimpleCalTableProduct

Product Access Layer

Tasks

Improved history recording so that it can be added to the sub-products of a context.

Quality control

Reorganization of quality flags as private or public for HCSS, HIFI, PACS and SPIRE Quality Flags. This ensures that only the flags useful for the assessment of the science by the user (the public ones) make its way to the quality summary.All the information from the quality flags remain at the quality product, for internal assessment or history.

In the quality report, a new "¤mpact" column in the "Quality flags" table, after "Concept" and "Value" columns has been added. This new column is an automatically filled column with a brief text describing the possible consequences for science data from the situations that caused that quality flag to be raised.

Improvement of readability of quality flags in the meta data of products in FITS files. Now one meta data item per quality flag making proper use of parameter values and descriptions.

eg.) qflag_PARXXXXX_p <value> ⁄ <description>

Systematic product generation

Data input-output

Virtual Observatory

Installer

The user installer has been reduced by 400-800MB by removing the pointing distortion maps previously included with the data a part of user installation.

Documentation

HIFI

HIFI Software Configuration and Properties

HIFI Calibration

  • A new calibration tree has been implemented in HIPE 14.0. It contains substantial changes in the sideband ratio tables, as well as a complete intensity calibration uncertainty component model. The corresponding UncertaintyTable products are available in calibration -> Downlink -> Generic and were updated with the following uncertaintyType HotLoadTemp, ColdLoadTemp, HotLoadCoupling, ColdLoadCoupling, SidebandRatio, OpticalStandingWavesLoads, OpticalStandingWavesDiplexer
  • The new calibration tree also provides tables of spur warning channel flags for point and mapping modes. These flags are assigned based on a knowledgebase built out of the spur flags manually identified for spectral scans and populated in the calibration tree in HIPE 13.0
  • The sideband ratio updates will imply changes in intensity at all frequencies in bands 1 to 4. No changes are expected in bands 5 to 7.

HIFI Pipeline

hifiPipeline task

Level 0 Pipeline

WBS Pipeline

HRS Pipeline

Level 1 Pipeline

Level 2 Pipeline

  • For DBS Raster maps, the Level 2 spectra are no longer averaged - this was already the case for OTF maps
  • Introduction of a new calibration output providing a frequency-dependent intensity calibration uncertainty budget
  • Assignment of spur warning channel flag for all point and mapping modes

Level 2.5 Pipeline

  • Changes to the output of the Deconvolution task: the single-sideband spectrum is now contained in a Spectrum1d called "dataset" (it was called "ssb" up to HIPE 13).

HIFI Products

  • New quality flags information:
    • updates of a few QFs names/descriptions (which were obsolete), deleting a few obsolete flags
    • reorganisation of categories in the documentation (from class 1 to 3, by how severe the impact they may have on the science)
    • updates to the impact and action text following a legacy use
    • updates to the quality report, now including the text for public flags (impact and action)
  • Flags are now applied to OFF spectra as well
  • BrowseProduct: generation of a browse image for the reference spectra, when the option useReferenceSpectra is set to true
  • The FITS header keywords have been revamped in order to provide proper nicknames to the parameters featured in those headers
  • From 14.1 onwards:
    • Some relevand meta-data that were missing in cubes generated with 14.0.1 have now been added to the product headers
    • The issues with the 14.0.1 products whereby the mean and median statistics products were erroneously set to 0 has been fixed

HIFI Spectrum Toolbox

Spectrum Explorer (HIFI specifics)

Spectrum tasks (HIFI specifics)

HIFI Data Processing Tools

Standing Wave Removal

  • New parameter addMedianContinuum: allow the median continuum to be added back into the baseline fit flux [DEFAULT: False]

Baseline Removal

  • New parameter addMedianContinuum: allow the median continuum to be added back into the baseline fit flux but only performs well for basemode='sub' and not basemode='div' [DEFAULT: False]
  • In 14.1, the above option will benefit from a fix whereby channels holding negtive fluxes will now be properly handled in the masking. This was not done correctly until 14.0.1.
  • FitBaseline has also been updated so that it deos not honour the informative SPUR_WARNING flags

Deconvolution

  • The output deconvolution product ssb is now called dataset (please note that scripts prior to this change will break)

Spectral Cube creation

flagTool

identifyLines

  • Updates to the task include:
    • Implementation of threading to speed up the task
    • Improvements of the rejection of false detected lines
    • Changes on the Herschel Spectral Line List columns names
    • Implementation of the image band line identification for pointed and mapping observations
    • Fix to the rms computation
    • Parameters change: toleranceEmission and toleranceAbsorption has become toleranceFactorEmi and toleranceFactorAbs (may break scripts prior to this change)
    • New parameter snrType: the signal to noise ratio calculation algorithm (Intensity or Flux)
    • Implementation of the exportLines task

HiClass export tool

  • Although this is not an HCSS development, it should be noted that GILDAS/Class now reads the HCSS-generated FITS without needing any prior conversion as it used to be the case using the HiClass task.

Documentation

For HCSS 14, many figures were refreshed in both manuals (HIFI Data Reduction Guide and HIFI Pipeline Specification).

  • Updates to the HIFI Data Reduction Guide:
    • Updates to the chapters Standing wave Removal and HIFI Baseline Removal : adding definition of the new parameter addMedianContinuum
    • Updates to the chapter Flags in HIFI data, section Quality Flags (this chapter is being revamped, please check regularly)
    • Updates to the chapter How to make a spectral cube: added a definition for parameters ignoreOffs, outputNames and extrapolate
    • Updates to the chapter Sideband Deconvolution: the output deconvolution product ssb is now called dataset (please note that scripts prior to this change will break)
    • Updates to the chapter Standing wave Removal, ESW correction in HEB bands section: update to the scripts in the demonstration subsection
    • Updates to the chapter How to add and remove flags, section Setting and Clearing Flags with command line tools: improved the definition of the parameter selection for Level 2.5 cubes
    • A new chapter called Understanding the uncertainty table information in your data has been added
    • Updates to the chapter The HIFI line identification tool, adding a section called The exportLines Task
    • From 14.1 onwards: updated the table describing the content of the HIFI Calibratioin Tree
  • Updates to the HIFI Pipeline Specification manual
    • This manual has been restructured
    • Removal of the task mkSpur
    • Corrections to broken links pointing to the HIFI Data Reduction Guide
    • Correction due to a missing figure Level 0 Pipeline flow diagram
    • Added text to tasks which did not have text, or were poorly documented, including mkRms
    • Updates to several tasks on flags information

PACS

Pipeline

* A new task runPacsSpg was introduced in 14.0, with which a user can run a full SPG pipeline within HIPE, starting from the level-0 data in an observation context from the HSA, or even from the raw telemetry files when they are available.

Photometry

  • Level2.5 products:
    • Unimap and Jscanam maps are now generated for Solar System Objects, from combined scan and cross-scan observations.
    • A block detection and masking method has been implemented, this avoids strong signal gradients being generated by the calibration blocks. The quality of Level2.5 maps is enhanced in particular for those observations acquired at the early stage of the mission (e.g. Science Demonstration Phase), when the calibration blocks were acquired in the middle of the an observation.
  • Interactive pipeline scripts:
    • The JScanam ipipe script scanmap_JScanam_multiplePairs is designed to process multiple pairs of obsIDs and it has been upgraded by introducing the scanamorphosAlignFrames Task. This task aligns the Frames signal levels, belonging to every observation, to a common offset level, by exploiting the overlapping sky regions. This new capability is particulary useful for recovering a common background level over observations that are partially or slightly overlapping.
    • The script scanmap_Unimap_memory_optimized has been added to the Pipelines menu. This allows one to run the Unimap release located on the userĺs computer while using the minimum amount of memory. It is particularly useful for processing large observations or/and if several obsIDs should be processed all together in a single run.
    • The Unimap interactive scripts (scanmap_Unimap_memory and scanmap_Unimap_memory_optimized) are updated in HIPE14.2 in order to be compatible with any Unimap release (up to 6.5.3).
    • The script photextended_pipeline_L3 is now available in the Pipelines menu. This can be used to generate mosaics of Unimap and Jscanam Level2.5 maps.
  • Unimap : In SPG14.0.1, Unimap 6.2.0 is spawned to create Level 2.5 products, while in SPG14.2 Level 2.5 products are generated by using Unimap 6.4.4. The main differences between the two Unimap releases are the introduction of the pixel noise compensation and the generation of the proper error maps in Unimap 6.4.4 (See the Photometer Data Reduction Guide and the offical Unimap webpages (http://infocom.uniroma1.it/unimap/) for details). For SPG14.2.1, the values of some Unimap parameters were modified for a small set of observations, because of a bug in the 6.4.4 Unimap release (see PACS Photometer section at the Data Products Known Issues wikipage)

Spectroscopy

  • Interactive pipeline scripts in 14.0, 14.2
    • The pipeline menu has been reworded, so that the names reflect better what the individual scripts do. The first script offered in each menu is also the preferred one, and that on which the SPG scripts are based.
    • A new pipeline script has been written to create drizzled cubes, based on (and only slightly different to) the 'Telescope normalisation' pipeline script for chopNod line scans. With this script it is now possible to create drizzle cubes using this preferred pipeline method (in Track 13 it was not possible).
    • There have been small, but potentially significant changes to some of the tasks in the 'Pointing offset correction' scripts (chopNod) and the '...with transients" scripts (unchopped). These are, respectively, to the tasks specDetermineChiSquare and specLongTermTransient. The improvements are "under the hood" so there is no change in the user scripts themselves.
    • The range scan flatfielding task now performs a cubic spline fitting to the continuum of the spectra. This produces the same results as previously with the polynomial fit for shorter ranges, but improved results for longer ranges (especially SEDs) and is more robust against curvature changes in the spectra.
  • SPG scripts in 14.0. 14.2
    • The range scan observations are now flatfielded: using the cubic spline fitting method for ranges longer than 5 microns, and using the line scan flatfielding for the shorter ranges. The decision as to which flatfielding method to use is based on the wavelength range of the prime camera, and the parallel camera data use the same task as the prime camera uses (regardless of its own wavelength range).
    • We exclude the spectral regions affected by leakage as the calibration is incorrect for those ranges. In 14.0 this applied to range scans only, but in 14.2 no observation will have data below 55 microns or above 190 microns.

Calibration

Photometry

Spectroscopy

  • Extended source correction. The extended-source calibrated rebinned cubes (level2) are subjected to a correction that accounts for the non-uniform illumination of the PACS IFU field-of-view. It stems from the fact that the 9.4"x9.4" spaxel edges are less responsive than their centres, translating into a spaxel active area of approximately 8"x8" where the response is flat. This effect is more severe at shorter wavelengths, and affects (very) extended emission, as well as off-centred point sources and any source that has a size between a point and a very extended. All Level 2/2.5 cubes for these types of sources will be affected, whether pointed or mapping.
    Hence, for centred point source extracted with the task extractCentralSpectrum, no change to the spectra are expected in this version of HIPE because of this effect. For very extended sources, we have developed a new Extended Source Correction calibration file (ExtendedSourceLoss, applied in the pipeline tasks specRespCal and specRespCalToTelescope), and this incorporates the necessary correction as part of the spatial flatfielding for the PACS spectrometer. For these sources, the fluxes of the spectra will differ to what was obtained in previous versions of HIPE. For intermediate sources, a more complex analysis is necessary to estimate the flux loss, and a task to do this will be provided in HIPE 15.
    The fluxes of the spaxels of all cubes will be changed by ~+30% in the blue to ~-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
    p=PlotXY(w, 1./f)
    After such a correction, a source of flat surface brightness within the field of view of a single pointing will be well calibrated at the level of the rebinned cubes (i.e. level2). The flux loss between the detectors was already accounted for in the point-source calibration correction in the correspondent calibration file, therefore, point-source calibrated spectra of centred point sources are not affected. For this reason, in HIPE 14, the extractCentralSpectrum task checks and removes the extendedSourceLoss correction from the level2 cubes, in case it has been applied, before extracting the final point source corrected spectrum. 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: this task can be found in the "Point source loss correction (any spaxel)" script in the Scripts->PACS useful menu.
  • 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.
    • all the 25 beams were divided by the peak value of the central spaxel beam;
    • then, they are multiplied to match the Point Source Correction calibration file (pointSourceLoss FM_4).
  • 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.
  • A new RSRF for band R1, which includes the correct response correction for the red leak region (>190 micron) is used in HIPE/SPG 14.2. The red region is not actually calibrated in the SPG products, since a different pipeline to that run by the SPG is necessary, but these spectral ranges can be reduced interactively using appropriate the HIPE pipeline scripts and the advice in the PACS Data Reduction Guide.
  • New spatial calibration in 14.2. The footprint of the IFU of PACS (the spaxel sizes and distributions) has been recalibrated.
    • The main change is that the spaxel sizes are set at 9.4" in two of the the tasks that create mosaic cubes (specInterpolate, specProject), rather than being calculated uniquely for each observation: the sizes now are slightly larger that before. Drizzle already assumed a fixed spaxel size of 9.4". The spaxel themselves have not changed, only the way they are treated in these two mosaic tasks.
    • The layout of the spaxels has changed slightly, and this affects the spectra in all mosaic cubes (specInterpolate, specProject, and drizzle).
    • There is no difference in the spectral fluxes due to this new spatial calibration in the rebinned cubes. For the mosaic cubes you will notice a difference to the flux distribution. The degree of this effect will be reported on when the SPG processing for 14.2 has been completed. It depends on the mapping pattern, the source brightness, and the source morphology.

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).
  • PacsCubes and PacsRebinnedCubes created by the pipeline will now display in HIPE cube viewers with a flip over the diagonal, as compared to previously (X: to the right, Y: upwards). This change allows the visualisation of PACS cubes into the PACS footprint orientation (note the axes display with X: downwards, Y: to the left). The displayed indices correspond to the PACS spaxel indices (see more in Sect. 6.3 of the DAG). The standard HIPE cube visualisation can be recovered in two steps, using the flip menu in the cube display control bar: no flip + vertical flip. When exporting the cube data outside HIPE, note that the data will still be organised according to standard cube indices.The new orientation makes it easier to compare the cubes in cube viewers (the Standard Cube Viewer or the Spectrum Explorer) to the display of the PacsSpectralFootprint viewer.
  • Two new Useful scripts: to create mosaic cubes with any spaxel size (prime use-case: wanting to give drizzled cubes the same spaxel size for all wavelengths for a single observation) starting from the Level 2 products; to mosaic together unrelated observations that overlap spatially and spectrally, starting from Level 1 products

Product changes

  • Many improvements to the descriptions and/or units of the header meta keywords.
  • All keywords have now a corresponding 8 character FITS keyword, so that the headers are easier to read with other software.
  • Note that in some cases the level2.5 and level3 products have been produced with a higher version of 14 than the level0 to level2 processing.

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 Na´ve map.

Spectroscopy

  • The following spectroscopy obsids will receive a final SPG processing in 14.2.2: 1342247513, 1342246558,1342225987, 1342225145, 1342225789, 1342247790
  • Unchopped range scan observations in 14.2
    • For unchopped range scan observations, the on-source and off-source are separate obsids and each is reduced to Level2. Then the off-source data are subtracted from the on-source data and the "background subtracted" products added to Level 2.5. This has been the case for a long time. The difference now is that these products have a slightly different name: "BS" is appended to the product names as viewed in HIPE and to the FITS file names on disc.
  • Level 2/2.5 extracted spectral tables in 14.0, 14.2
    • A new product is provided at Level 2 for all (line, range, chopNod, unchopped) pointed observations, and also at Level 2.5 for the subset of unchopped, rangeScan observations. This table, HPSSPEC[BS][R|B], contains the extracted spectrum of the central spaxel, and the point source calibrated spectra "c1" and "c129" from the pipeline task extractCentralSpectrum. Since the point-source calibrated spectra are taken from the centre of the cube, it is necessary that the source is located within spaxel 2,2 (the central one). However, we make no determination that the target of the observation actually is a point source - that is up to the end-user to establish. These tables are also provided as SBPs.
    • Added in 14.2.0: the output spectrum "c9" from extractCentralSpectrum is also provided.
  • Level 3 extracted spectra table in 14.0, 14.2
    • The new spectrum tables from Level 2 for the pointed, chopNod, full SED observations, are concatenated into a single table which is placed in Level 3. This table, HPSSPEC, contains the extracted spectra for all the observations that were taken to cover the full spectral range (the full SED) of PACS for that target (this will be usually two, sometimes three, separate observations). Moreover, the red and blue camera, and all slices, are included this single table. This table is also provided as a standalone browse product.
    • The list of obisds that are combined into a Level 3 can be found on the data products overview page (http://www.cosmos.esa.int/web/herschel/data-products-overview).
    • Added in 14.2.1: due to an oversight in 14.2.0, the Level 3 was only added to the first observation (the first obsid) in each set of (2 or 3) obsids in the list linked above. In SPG 14.2.1 we reprocessed the Level 3 only to correct this oversight. Now, every obsid in the list will have its appropriate Level 3.
  • Interpolated cubes in 14.0 and 14.2
    • These cubes now have a spaxel size of 3" rather than 4.7".
    • They are no longer provided for oversampled mapping observations.
    • In 14.2 they have an error dataset. This is not a full error, which would be the combination of the interpolation of the original errors and the error in the interpolation process. We have provided the first only, that is the stddev array of the input cubes are interpolated to create an error array in the output cubes.
    • The way the task specInterpolate handles NaNs as it creates these cubes has changed. This will primarily affect cubes with saturated data. Saturated data are masked out and replaced with NaNs when rebinned cubes are created. The interpolated cubes are then created from these rebinned cubes. The interpolation algorithm filters out NaNs rather than interpolating over them, and as a consequence the affected and the immediately surrounding spaxels will also be set to NaN for that wavelength point. This is a more correct way to handle NaNs, especially those due to saturation.
  • Standalone browse products (SBPs) in 14.0 and 14.2
    • We now provide the new extracted spectra tables, HPSSPEC[BS][R|B] and HPSSPEC (see above)
    • The background subtracted unchopped range ("BS") products have been added: so for unchopped range scans where the observer requested an off-source, the SBPs for the on-source obsids will include Level2 cubes and tables and the background subtracted ones ("BS")
  • Wavelength cutoff: no observation processed by SPG 14.2 has data blue of 55 microns or red of 190 microns.
  • Drizzle cubes: in SPG 13 the drizzle cube fluxes were incorrect. In SPG 14 they are correct.

Documentation

  • The PACS Products Explained includes information about the organisation and contents of the FITS files from a tarball download from the HSA. It also has a short section summarising which products to use for general science cases.

SPIRE

Calibration Products

  • Spectrometer
    • A new calibration product SCalSpecLrCorr has been added, containing correction curves for point-source calibrated LR data.
    • A new calibration product SCalSpecExtCorr has been added, containing polynomial coefficients that are used to generate correction curves for extended source calibrated data.
    • A new calibration product SCalSpecOpdCorr has been added, it is currently neither used in the pipelines nor in user scripts.
    • Updated calibration product SCalSpecBrightGain with the correct gains for the bright source mode
  • Photometer

Calibration Framework

Preprocessing

Engineering Conversion

Common Pipeline

  • Note that in some cases the level2.5 and level3 products have been produced with a higher version of 14 than the level0 to level2 processing.

Photometer Pipeline

  • The User Pipelines have been updated with an option to create not just the point source maps but also the absolute calibtated maps in MJy/sr by setting the makeExtendMaps option
  • Access to the Planck maps in both the User pipelines and Useful Scripts is now handled automatically (see the zero point correction script for details on initial set up)
  • The serendipity data (when the telescope slews to a target) is now included all the way to Level 1 in the Observation. Note that the serendipity data is the final building block and is NOT destriped.
  • The SPIRE Level 2.5 data products have been extended to include, not only parallel pairs, but also sets of 2,3,4+ observations that would benefit from merging at the Level 2.5 stage. See the SPIRE Data Reduction Guide for a list of these observations.
  • In HIPE 14.2.1: the image and error extensions of the SPIRE level-3 maps, produced with the mosaic() task, are properly calculated.

Spectrometer Pipeline

  • A new task has been added to the point source pipeline that applies a correction to remove significant artefacts from SLW spectra of LR observations (and the LR part of H+LR observations)
  • A new task has been added to all pipelines that applies the extended calibration correction in order to incorporate the far field feedhorn efficiency for extended source. As a consequence we get better agreement between FTS and Phototmeter for fully extended sources.
  • The browse product image for intermediate and fully sampled mapping observations, and sparse raster observations, has been updated to provide more information.

Interactive Analysis and Tools

  • There is a new useful script, Spectrometer Pointing Offset Corrector, for estimating and correcting pointing offset in sparse point observations. The scripts assesses the difference between the SLW and SSW spectra of the centre detectors, over the overlapping frequency range, uses this to estimate any pointing offset and corrects the data using SECT.
  • The Spectrometer Background Subtraction useful script will now automatically omit outlying off-axis detectors from the average used to subtract the background. The smoothed off-axis spectra used for the average, any off-axis spectra that were omitted and the mean sum are plotted at the end of the script. If interactive selection is turned off, these plots make it possible to check the outliers selected by the script, and if necessary, repeat the process so that outliers can be selected by eye.

Documentation


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-- AlvarGarcia - 24 Nov 2014

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