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Herschel Calibration Workshop: Cross-Calibration Goals

Herschel Calibration Workshop: Cross-Calibration Goals. Anthony Marston & Elena Puga, Herschel Instrument and Calibration Scientist Team, HSC, ESAC. Intra Instrument Calibration Consistency. Planck cross-calibration. Photometer. Spectrometer. Between modes of operation.

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Herschel Calibration Workshop: Cross-Calibration Goals

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  1. Herschel Calibration Workshop: Cross-Calibration Goals Anthony Marston & Elena Puga, Herschel Instrument and Calibration Scientist Team, HSC, ESAC.

  2. Intra Instrument Calibration Consistency Planck cross-calibration Photometer Spectrometer Between modes of operation Cross Instrument Calibration Consistency Cross Observatory Calibration Consistency Model Checks • Stars • Planets • Asteroids Observation feedback for these models Calibration legacy for other Observatories Cross Cal Introduction * Herschel Cross Calibration Plan and Use Cases, v0.1 25/08/2010 (HERSCHEL-HSC-DOC-1720) * Herschel Cross-calibration report, drat v1.0 (HERSCHEL-HSC-REP-1935)

  3. PACS HIFI SPIRE CO 16-15 CO 6-5 CO 10-9 CO 8-7 CO 13-12 CII Spectral Overlaps HIFI – PACS: 1360-1900 GHz. Red leakage 1360-1550 GHz PACS – SPIRE: 1360-1550 GHz SPIRE – HIFI: 1400-1550 GHz & 490-1250 GHz HIFI – PACS: 157-220 mm. Red leakage 190-220 mm PACS – SPIRE: 193-220 mm SPIRE – HIFI: 193-213 mm & 240-616 mm Diagnostic lines in routine cross-calibration programmes

  4. Spectral line fluxes Continuum fluxes Cross Comparisons: Use Cases HIFI observations with fast chop and continuum timing options enabled • Single line measurements of point sources (or sources of known small size) • Line spectroscopy + single pointing • Single line measurements of extended sources • Line spectroscopy + Mapping • Broad range measurement of point sources • Broader range + single pointing ...see presentations by Peter Imhof and Ivan Valtchanov

  5. Spectral line fluxes Continuum fluxes HIFI observations with fast chop and continuum timing options enabled • Single line measurements of point sources (or sources of known small size) • Line spectroscopy + single pointing • Single line measurements of extended sources • Line spectroscopy + Mapping • Broad range measurement of point sources • Broader range + single pointing ...see presentation by Elena Puga

  6. Spectral line fluxes Continuum fluxes HIFI observations with fast chop and continuum timing options enabled • Single line measurements of point sources (or sources of known small size) • Line spectroscopy + single pointing • Single line measurements of extended sources • Line spectroscopy + Mapping • Broad range measurement of point sources • Broader range + single pointing ...see presentation by Pierre Royer and Elena Puga. Narrow overlap limits the exercise.

  7. Cross Calibration Source Sample New list of common Calibration Monitoring Sources after Cross-calibration Proposal (Sep 2011): Additional sources belonging to the HIFI Calibration source monitoring programme (most expensive in time)

  8. Cross Calibration Plan: Observation strategy • Materialized in a Spectrometer Cross-calibration Proposal: Total of 32.7 hours of observing time for cross-calibration purposes • Regular coordinated monitoring of CCMs • Completion of inter-instrument comparison of additional sources Position/pointing. Extended source corrections? HCalSG29 E.Puga 8

  9. Goals • Consistency • Feedback to models and better calibration through them • Determination of clear problem areas in standard processing • Specific: • PACS-S red leak using SPIRE/HIFI spectra • HIFI continuum – which modes really do give accurate continua?

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