1. HIFI Hands-on Exercises
A.P.Marston
ESAC
27 June 2013

2. Hands-on Exercises Data inspection (see Quickstart chapter 5)
Know the data: frequency, size, quality, etc
Spectrum explorer / cube explorer (e.g. see DAG/HowTos chapter 6)
Scale conversions in spectrum explorer (also see HIFI DRG Chapter 16)
Output plots
Spectrum and Cube Toolboxes (see DAG/HowTos Chapter 6.7)
Baseline removal (see HIFI DRG chapter 11.3)
Re-pipelining HIFI data (see HIFI DRG chapter 5)
Regridding of maps (see HIFI DRG chapter 13)
Combining H and V polarizations (polarPair, also see HIFI DRG Chapter for cubes/maps)
Line fitting/integration (chapter 7 Herschel DAG)
Line intensity maps (chapter 6.7 Herschel DAG – cube analysis)
Data flagging and Deconvolution (see HIFI DRG chapter 9)
Reprocessing spectral scans and deconvolution of spectral scans (see HIFI DRG chapter 12)
Handling issues:
Fringe removal (fitHifiFringe). Chapter 10 of HIFI DRG.
HEB standing wave reduction
Data export: including  CLASS (hiClass). Chapter 20 of HIFI DRG
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3. Getting Data obs = getObservation(1342190786,useHsa=True)
Then import the tar file you retrieve
obs = getObservation( ,useHsa=True)
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4. Observation Context
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5. SpectrumExplorer/Cube viewer
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6. Baseline Removal: fitBaseline
Baseline removal can be done in several ways (see tutorial 2).
Spectrum Fitter GUI
Cube analysis (for maps)
Can also interactively work with fitBaseline
Can work with an observation, a HTP or a spectrum dataset (make it small for now)
Allows interactive baseline removal
Can also be included (with or without interaction) in any repipelining
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7. Running a pipeline and updating data.
Take your product and look at the history to see what calibration and SPG version was used.
Repipeline with the most up to date calibration information.
Try also including an optional task or two in the pipeline to produce your “perfect” product.
Save your data – various ways, also try reading in data (e.g. FITS image)
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8. Try extending pipeline for e. g. mapping task, e. g
Try extending pipeline for e.g. mapping task, e.g. obsid = (small [CII] map of Orion Bar)
Add in doGridding with different pixel size
Other possible functions – see documentation.
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9. Combine polarizations for point source/map and analysis
Try methods described in tutorials for adding H and V – e.g. polarPair
Work with the products and get line integration/spectral fits etc.
Get fitted parameters
Create position-velocity map
Etc…
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10. Get a spectral scan and use the flagTool
Run the flagtool to see issues automatically noted in a spectral scan.
Check out the data with issues. Some issues overlooked?
Adjust the flagging (even if only to see what happens…..
See HIFI DRG chapter 8 for the consequences of setting flags.
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11. Run deconvolution task to create a new spectral scan of a single sideband (ssb)
DoDeconvolution task selection.
Put in your observation and indicate which backend to get a deconvolution from.
Can make some choices about what to ignore and what not to ignore in the flagged data.
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