1. → Herschel data for absolute beginners Herschel Science Centre (ESAC)

2. 2 This presentation contains a simple cookbook to search, retrieve, analyse and reprocess Herschel data from the Herschel Science Archive. Step 1: Register to be able to retrieve data from the Herschel Science Archive Step 2: Search for your data Step 3: Retrieve your data Step 4: Look at your data Step 5: Decide whether you need to reprocess or not (Step 5b: Reprocess your data) Step 6: Analyse your data. CONTENTS

3. 3 Step 1: Register to be able to retrieve data from the Herschel Science Archive http://herschel.esac.esa.int/registration.shtml Step 2: Search for your data At the postcard gallery (web-based): http://archives.esac.esa.int/hsa/aio/doc/postcardGallery.html With the Herschel Science Archive User Interface (java): http://herschel.esac.esa.int/Science_Archive.shtml You can search by object name (SIMBAD/NED resolved), by coordinates, by programme, by observer or by date. STEPS 1 & 2: REGISTRATION AND SEARCH

4. 4 Step 4: Look at your data Summary of basic instrumental characteristics STEP 4: LOOK AT YOUR DATA The Herschel Instruments: ImagingSpectroscopy PACS – Photodetector Array Camera and Spectrometer 70 & 160 μm or 100 & 160 μm 50 – 210 μm R ~ 1000 - 5000 SPIRE – Spectral and Photometric Imaging Receiver 250, 350 and 500 μm 194 – 671 μm R ~ 20 - 1000 HIFI – Heterodyne Instrument for the Far Infrared -157 – 625 μm R = 10 6 - 10 7

5. 5 Step 4: Look at the data The level2 data are fully calibrated images, spectra and cubes. The Level 2.5 data combines level2 maps of the same region. STEP 4: LOOK AT YOUR PACS & SPIRE IMAGES PACS Photo: 70 & 160 or 100 & 160 micron Jy/pixel SPIRE Photo: 250, 350 & 500 microns Jy/beam or MJy/sr M31 Andromeda

6. 6 STEP 4: LOOK AT YOUR PACS SPECTRA PACS Spec pointed: spectral cubes (5x5 spaxels) Jy vs micron PACS Spec mapping: spectral cubes (small spaxels) Jy vs micron

7. 7 STEP 4: LOOK AT YOUR SPIRE SPECTRA SPIRE spec pointed: full coverage Jy vs GHz SPIRE spec mapping: spectral cubes Jy vs GHz

8. 8 STEP 4: LOOK AT YOUR HIFI SPECTRA HIFI pointed: very high spectral resolution Double side-band (USB & LSB), K vs GHz HIFI mapping: spectral cubes (level2.5) Double side-band (USB & LSB), K vs GHz HIFI spectral scans: single spectra (level2.5) Single side-band (USB & LSB), K vs GHz

9. 9 Step 5: Decide whether you need to reprocess or not This is a science-dependent question, in general all PACS data and most spectroscopy needs reprocessing for science. More details: Data Products Known Issues: http://herschel.esac.esa.int/twiki/bin/view/Public/DpKnownIssues?template=viewprint (Step 5b: Reprocess your data in HIPE) Not for this demo STEPs 5: REPROCESS YOUR DATA (IF NEEDED)

10. 10 The Herschel Images Filterλ μm FWHM arcsec “Pixel” size arcsec Flux Units Point-source Sensitivity mini- scan 5σ /1 h mJy FITS Filename Refs. PACS–70705.2 x 5.8 (slow scan) – 5.8 x 9.0 (fast scan) – 5.8 x 12.1 (fast scan, ||) 3.2Jy/pixel4.7 (slow scan)Level 2/2.5: hppppb 11, 2, 32 3 PACS-1001006.6 x 6.8 (slow scan) – 6.9 x 9.7 (fast scan) – 6.9 x 12.7 (fast scan, ||) 3.2Jy/pixel5.5 (slow scan)Level 2/2.5: hppppb 11, 2, 32 3 PACS-16016010.4 x 12.02 (slow scan) - 11.3 x 13.3 (fast scan) – 11.6 x 15.7 (fast scan, ||) 6.4Jy/pixel10.5 (slow scan)Level 2/2.5: hppppr 11, 2, 32 3 SPIRE-25025018.26Jy/beam & MJy/sr 7.3 (slow scan ||) – 12.6 (fast scan ||) Level 2/2.5: Hspirepsw 4 SPIRE-35035024.910Jy/beam & MJy/sr 6.0 (slow scan ||) – 10.5 (fast scan ||) Level 2/2.5: hspirepmw 4 SPIRE-50050036.314Jy/beam & Mjy/sr 8.7 (slow scan ||) – 15.0 (fast scan ||) Level 2/2.5: Hspireplw 4 HERSCHEL IMAGING REFERENCE

11. 11 The Herschel Spectra: Instrument Mode Wavelengths micron/GHz Wave Freq. Units Flux Unit Line flux Sensitivity 5σ /1 h W/m 2 FITS Filenames Level 2 mostly Refs. PACS lineB2A/R1:103-220 μm B3A/R1: 51-73 μm B2B/R1: 71-105 μm μmJy B2A: 1.7 x 10 -6 - 8.010 -8 hps3dpX[B/R] (spec. cubes) Rebinned: 5 x 5 x N. (freq.) Projected: 24 x 23 x N. (freq.) 1 PACS rangeB2A/R1:103-220 μm B3A/R1: 51-73 μm B2B/R1: 71-105 μm μmJyB2A: > 1.7 x 10 -6 - 8.010 -8 hps3dpXs[B/R] (spec. cubes) Rebinned: 5 x 5 x N. (freq.) Projected: 24 x 23 x N. (freq.) 1 SPIRE FTS pointed SSW: 194 – 313 μm SLW: 303 – 671 μm GHzJy1.5 – 2.1 x 10 -7 hspireanapod (binary table, two tables, SSW and SLW) 4 SPIRE FTS mapping SSW: 194 – 313 μm SLW: 303 – 671 μm GHzJy1.5 – 2.1 x 10 -7 hspireanapodSxW (cubes) SSW: 10 x 10 x 1951 (freq.) SLW: 5 x 5 x 1810 (freq.) 4 HIFI pointedbands 1-5: 488-114 GHz Bands 6-7: 1430-1900 GHz GHzK<6 % (bands 1,2,3,4) < 10% (band 5) < 30% (bands 6,7) hhifi[hrs/wbs][h/v] (binary tables) 5 HIFI spectral scan bands 1-5: 488-114 GHz Bands6-7:1430-1900GHz GHzK<6 % (bands 1,2,3,4) < 10% (band 5) < 30% (bands 6,7) Level 2.5: mydecon/hhifiX[h/v] WBS: 2 x 34649 (freq.) 5 HIFI mapping bands 1-5: 488-114 GHz Bands6-7:1430-1900GHz GHzK<6 % (bands 1,2,3,4) < 10% (band 5) < 30% (bands 6,7) Level 2.5: hhifiX[h/v] [lsb/usb] HRS: 5 x 29 x 3826 (cubes) WBS: 5 x 29 x 1128 (cubes) 5 HERSCHEL SPECTRA REFERENCE

12. 12 HERSCHEL REFERENCE LINKS Herschel Science Centre webpage http://herschel.esac.esa.int Herschel Observing log http://herschel.esac.esa.int/logrepgen/observationlist.do Herschel Publications tool http://herschel.esac.esa.int/hpt/publicationlist.do Herschel Science Archive http://herschel.esac.esa.int/Science_Archive.shtml Herschel Interactive Processing Environment (HIPE) http://herschel.esac.esa.int/hipe/ Herschel data reduction youtube video tutorials http://www.youtube.com/user/hipeacademy Any questions? Let us know.. http://herschel.esac.esa.int/esupport/

13. 13 Thank you Any questions?

14. 14 Step 1: Search “Fomalhaut” in SIMBAD Step 2: Search for it at the Herschel Postcard Gallery Step 3: Look at the images with ds9 or Aladin Step 4: With ds9 or Aladin retrieve near-IR images from the 2MASS Survey and compare with the Herschel ones. Step 5: With ds9 or Aladin blink all images from near-IR to 500 microns. Step 6: With ds9 make a RGB color composite with the images. Step 7: Calculate apparent sizes of the source in arcsec and in AUs at the different Herschel wavelengths Step 8: compare result with Acke et al. (2012) http://esoads.eso.org/abs/2012A%26A...540A.125A HERSCHEL IMAGE ANALYSIS TUTORIAL

15. 15 From parallax to parsec: Distance(parsec) = 1./AngularSize(arcsec) From angular size to physical size Distance (AU) = Distance (parcsec) * AngularSize (arcsec) HERSCHEL IMAGE ANALYSIS TUTORIAL

16. 16 Feedback forum: http://mmi-forum.wikispaces.com/home ABOUT THE MULTIMISSION INTERFACE