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Spectrometer Wavelength Calibration XHSPOT Proposal: PVSpecWave H. Feuchtgruber

Spectrometer Wavelength Calibration XHSPOT Proposal: PVSpecWave H. Feuchtgruber. Description of the Calibration Problem. 47” x 47”. Blue array: 400 pixels Red array: 400 pixels 2 different blue filters 3 grating orders - Grating range: 32000-1064000 positions

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Spectrometer Wavelength Calibration XHSPOT Proposal: PVSpecWave H. Feuchtgruber

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  1. Spectrometer Wavelength CalibrationXHSPOT Proposal: PVSpecWaveH. Feuchtgruber PVSpecWave

  2. Description of the Calibration Problem 47” x 47” • Blue array: 400 pixels • Red array: 400 pixels • 2 different blue filters • 3 grating orders • - Grating range: • 32000-1064000 positions • Spectral resolution elements: • ~3650 (x sampling x time) 2x 1st order 2nd order 3rd order PVSpecWave

  3. PCD Requirements • PCD sec. 4.2.1: • Required accuracy: “Peak position to within 10-20% of a spectral resolution element” PVSpecWave

  4. XHSPOT Proposal: PVSpecWave (1) PVSpecWave

  5. XHSPOT Proposal: PVSpecWave (2) …. more to be filled in according to actual target visibilities ! PVSpecWave

  6. Wavelength Calibration Targets (1) • Suitable target list containing strong molecular lines: - PICC-ME-TN-013, ”Use of late type stars for PACS wavelength calibration”, (D. Lutz) • “Photometric and Spectroscopic Calibration of Herschel Instruments with Planets and Satellites”, (Th. Encrenaz, R. Moreno, A. Coustenis) • Uranus(H2O), Neptune(H2O, CO), Saturn(H2O, NH3, PH3) • Jupiter (H2O, NH3, PH3 ; fills entire 5x5 field of view !) • Justtanont et al., A&A, 360, 1117-1125 (2000), “ISO-LWS observations of rotational CO lines from C-rich objects” PVSpecWave

  7. Wavelength Calibration Targets (2) • Suitable target list containing strong atomic fine-structure lines: • 19 selected Planetary Nebulae: IC418, IC2501, NGC5315, He2-131, NGC6210, NGC6543, NGC 6572, SwSt1, BD +30 3639, NGC6826, IC4997, NGC7027, NGC7662, NGC40, NGC3242, NGC3918, NGC5882, NGC6302, NGC6905 - Atomic fine-structure lines within the PACS wavelength range: [OIII]=51.8145µm; [NIII]=57.317µm; [OI]=63.184µm; [OIII]=88.356µm; [NII]=121.898µm; [OI]=145.525µm; [CII]=157.741µm; [NII]=205.178µm; - References: 1) ISO 95-015, Planetary nebulae to be used as ISO-SWS Astronomical Calibration Sources, H.W.W. Spoon, K.A. van der Hucht, D. Lutz 2) An Infrared Spectral Line List of Astrophysical Interest (2.4-200µm) and its use in the SWS and LWS ISO Central Program 3) www.mpe.mpg.de/ir/ISO/linelists/FSlines.html 4) Liu et al., MNRAS, 323, 343, (2001), “ISO LWS observations of planetary nebula fine-structure lines” [provides also observed line fluxes] PVSpecWave

  8. PVSpecWave: The spatial situation Diameter of Jupiter Mid-Jun-09 as seen from L2 43.9” White crosses indicate location of all PACS spectrometer spatial pixels PVSpecWave

  9. PVSpecWave: Spatial Information about Targets • Fluxes of moons and faint ring are being neglected • Roll-angle will be important for assigning rotational velocity shifts • separately for each spatial pixel (max. Δλ ~11km/s) • Check that no other bright targets come close to Jupiter at actual • observation date/time. • Require Herschel velocity towards target and doppler shifts PVSpecWave

  10. Status of Analysis and Uplink Preparation • For the overall calibration strategy and formalism see presentation at the Herschel Calibration Workshop#2 • Uplink (1st version) is defined in X-HSPOT proposal PVSpecWave • No relevant SOVT data available for analysis • Analysis code (or CAP) is unchanged from FM ILT • - Operating system: MS WinXP • - Use HIPE to generate L0 products • - Use IDL code to derive new • calibration parameters • - Output = ASCII files of polynomial • coefficients for inclusion into pipeline • Updated input model spectra for • all giant planets are available now covering the entire PACS wavelength range and convolved to the PACS spectral resolution, inclusion of HD • lines in progress Semi-Automatic calibration procedure PVSpecWave

  11. Calculated fluxes for 1 spatial pixel PVSpecWave

  12. Calibration Targets for Molecular Lines Start PV Start Routine Ops Target visibilities (HSPOT) PVSpecWave

  13. Calibration on bright PNs Start Routine Ops Start PV Target visibilities (HSPOT) Monitoring for roll angle/time dependencies etc. selected out of Ref. (1) PVSpecWave

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