PACS CoP & PV Review 21/22 Jan 2009 PVSpecWave1 Spectrometer Wavelength Calibration XHSPOT Proposal: PVSpecWave H. Feuchtgruber

PACS CoP & PV Review 21/22 Jan 2009

PVSpecWave 1

Spectrometer Wavelength CalibrationXHSPOT Proposal: PVSpecWave

H. Feuchtgruber


PVSpecWave 2

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)

Description of the Calibration Problem

1st order

3rd order

2nd order

2x


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)

CUS AOR Name Observation NameDuration

[Sec]

PacsCal_WaveCalChopGen PVSpecWave_421C_nStdRS_chopnodorderB_WHya_0001 15603

PacsCal_WaveCalChopGen PVSpecWave_421C_nStdRS_chopnodorderA_Neptune_0001 15613

PacsCal_WaveCalChopGen PVSpecWave_421C_nStdRS_chopnodorderA_WHya_0001 15603

PacsCal_WaveCalChopGen PVSpecWave_421C_nStdRS_chopnodorderB_Neptune_0001 15613

PacsCal_WaveCalNoChopGen PVSpecWave_421D_nStdLS_nochoporderRed_NGC6302_0001 533




PacsCal_WaveCalNoChopGen PVSpecWave_421B_nStdRS_nochoporderA_Jupiter_0001 7834

PacsCal_WaveCalNoChopGen PVSpecWave_421B_nStdRS_nochoporderB_Jupiter_0001 7834

PacsCal_WaveCalNoChopGen PVSpecWave_421D_nStdLS_nochoporderA_NGC6302_0001 529

PacsCal_WaveCalNoChopGen PVSpecWave_421D_nStdLS_nochoporderA_NGC6302_0002 530

PacsCal_WaveCalNoChopGen PVSpecWave_421D_nStdLS_nochoporderB_NGC6302_0001 529

PacsCal_WaveCalNoChopGen PVSpecWave_421A_nStdRS_nochoporderA_Jupiter_0001 704

PacsCal_WaveCalNoChopGen PVSpecWave_421A_nStdRS_nochoporderA_Jupiter_0002 704

PacsCal_WaveCalNoChopGen PVSpecWave_421A_nStdRS_nochoporderB_Jupiter_0001 1015




PVSpecWave 5

XHSPOT Proposal: PVSpecWave (2)

CUS AOR Name Observation NameDuration

[Sec]

PacsEng_PacsSpecSlewCalGen PVSpecWave_421B_nStdRS_SlewCalA_Dummy_0001 92



PacsEng_PacsSpecSlewCalGen PVSpecWave_421B_nStdRS_SlewCalB_Dummy_0001 92



PacsCal_WaveCalNodRasterGen PVSpecWave_425A_nStdRS_choprasterorderB_IC2501_0001 14733

PacsCal_WaveCalNodRasterGen PVSpecWave_425A_nStdRS_choprasterorderA_IC2501_0001 14734

PacsCal_WaveCalNodRasterGen PVSpecWave_425A_nStdRS_choprasterorderA_IC2501_0002 14733

PacsEng_Spec_CRE_setup_uGen PVSpecWave_421B_nStdCRE_setup_Dummy_0001 9





…. 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. Lutz2) An Infrared Spectral Line List of Astrophysical Interest (2.4-200µm) and its use in the SWS and LWS ISO Central Program3) www.mpe.mpg.de/ir/ISO/linelists/FSlines.html4) 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

43

.9”

Diameter of JupiterMid-Jun-09 as seen

from L2

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

• 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

• 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

Semi-Automatic calibration procedure


PVSpecWave 11

Calculated fluxes for 1 spatial pixel


PVSpecWave 12

Calibration Targets for Molecular LinesStart PV

Start Routine Ops

Targ

et

vis

ibili

ties

(HSPO

T)


PVSpecWave 13

Targ

et

vis

ibili

ties

(HSPO

T)

Calibration on bright PNsStart PV

Start Routine Ops

selected out of Ref. (1)

Monitoring for roll angle/time dependencies etc.

Documents

PACS CoP & PV Review 21/22 Jan 2009 PVSpecWave1 Spectrometer Wavelength Calibration XHSPOT Proposal: PVSpecWave H. Feuchtgruber