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Anthony Marston & Elena Puga, Herschel Instrument and Calibration Scientist Team, HSC, ESAC.
Herschel Calibration Workshop: Cross-Calibration Goals
Cross Cal Introduction
Planck cross-calibration
Intra Instrument Calibration Consistency
Photometer Spectrometer
Between modes of operation
Model Checks
StarsPlanetsAsteroids
Observation feedback for these models
Calibration legacy for other Observatories
Cross Instrument Calibration Consistency
Cross Observatory Calibration Consistency
* 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)
Spectral Overlaps
Diagnostic lines in routine cross-calibration programmes
PACS
HIFI
SPIRE
HIFI – PACS: 1360-1900 GHz. Red leakage 1360-1550 GHz PACS – SPIRE: 1360-1550 GHzSPIRE – HIFI: 1400-1550 GHz & 490-1250 GHz
CII CO 13-12CO 10-9 CO 8-7 CO 6-5CO 16-15
HIFI – PACS: 157-220 m. Red leakage 190-220 m PACS – SPIRE: 193-220 mSPIRE – HIFI: 193-213 m & 240-616 m
Cross Comparisons: Use Cases
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
Spectral line fluxes Continuum fluxesHIFI observations with fast chop and continuum timing options enabled
...see presentations by Peter Imhof and Ivan Valtchanov
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
Spectral line fluxes Continuum fluxesHIFI observations with fast chop and continuum timing options enabled
...see presentation by Elena Puga
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
Spectral line fluxes Continuum fluxesHIFI observations with fast chop and continuum timing options enabled
...see presentation by Pierre Royer and Elena Puga. Narrow overlap limits the exercise.
Name Alternative names RA (J2000) Dec (J2000) vLSR
(km/s) f160
(Jy)
AFGL 2688 V1610 Cyg, Egg nebula 21:02:18.78 +36:41:41.20 -34 488
CRL618 V353 Aur, Westbrook nebula
04:42:53.64 +36:06:53.40 -22 196
NGC7027 HD201272 21:07:01.59 +42:14:10.20 +25 90
NGC6302 HD 155520, Bug nebula 17:13:44.21 -37:06:15.90 -40 400
New list of common Calibration Monitoring Sources after Cross-calibration Proposal (Sep 2011):
Name Alternative names RA (J2000) Dec (J2000) vLSR
(km/s) f160
(Jy)
IRC+10216 CW Leo, Peanut nebula 09:47:57.38 +13:16:43.70 +26 610
VY CMa HIP 35793, AFGL 1111 07:22:58.33 -25:46:03.20 +21 137
R Dor HIP 21479 04:36:45.59 -62:04:37.80 +7 32.7
IK Tau IRC+10050, NML Tau 03:53:28.89 +11:24:21.88 +34 27.6
Ceti Mra 02:19:20.79 -02:58:39.50 +46 35.2
EP Aqr HD 207076, AFGL 2806 21:46:31.85 -02:12:45.90 -34 4.14
Additional sources belonging to the HIFI Calibration source monitoring programme (most expensive in time)
Cross Calibration Source Sample
HCalSG29 E.Puga 8
PACS
Range Spec 156--219
Line Spec CO 16-15 162.8
Line Spec CII 157.74HIFI
CO 6-5 433.56
CO 8-7 325.2
CO 10-9 260.24
CO 13-12 200.27
CO 16-15 162.8
CII 157.74
SPIRE
HR or CR Spec
197.0—313.0
303.0—672.0
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
Cross Calibration Plan: Observation strategy
Position/pointing.Extended source corrections?
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?
