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

2. Cross Cal Introduction Planck cross-calibration Intra Instrument Calibration Consistency Photometer Spectrometer Between modes of operation Model Checks Stars Planets Asteroids 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)

3. 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 GHz SPIRE – HIFI: 1400-1550 GHz & 490-1250 GHz CII CO 13-12 CO 10-9CO 8-7 CO 6-5 CO 16-15 HIFI – PACS: 157-220  m. Red leakage 190-220  m PACS – SPIRE: 193-220  m SPIRE – HIFI: 193-213  m & 240-616  m

4. 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 fluxes HIFI observations with fast chop and continuum timing options enabled...see presentations by Peter Imhof and Ivan Valtchanov

5. 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 fluxes HIFI observations with fast chop and continuum timing options enabled...see presentation by Elena Puga

6. 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 fluxes HIFI observations with fast chop and continuum timing options enabled...see presentation by Pierre Royer and Elena Puga. Narrow overlap limits the exercise.

7. NameAlternative namesRA (J2000)Dec (J2000)v LSR (km/s)f 160 (Jy) AFGL 2688V1610 Cyg, Egg nebula21:02:18.78+36:41:41.20-34488 CRL618V353 Aur, Westbrook nebula 04:42:53.64+36:06:53.40-22196 NGC7027HD20127221:07:01.59+42:14:10.20+2590 NGC6302HD 155520, Bug nebula17:13:44.21-37:06:15.90-40400 New list of common Calibration Monitoring Sources after Cross-calibration Proposal (Sep 2011): NameAlternative namesRA (J2000)Dec (J2000)v LSR (km/s)f 160 (Jy) IRC+10216CW Leo, Peanut nebula09:47:57.38+13:16:43.70+26610 VY CMaHIP 35793, AFGL 111107:22:58.33-25:46:03.20+21137 R DorHIP 2147904:36:45.59-62:04:37.80+732.7 IK TauIRC+10050, NML Tau03:53:28.89+11:24:21.88+3427.6  Ceti Mra02:19:20.79-02:58:39.50+4635.2 EP AqrHD 207076, AFGL 280621:46:31.85-02:12:45.90-344.14 Additional sources belonging to the HIFI Calibration source monitoring programme (most expensive in time) Cross Calibration Source Sample

8. HCalSG29 E.Puga 8 PACS Range Spec156--219 Line SpecCO 16-15162.8 Line SpecCII157.74 HIFI CO 6-5433.56 CO 8-7325.2 CO 10-9260.24 CO 13-12200.27 CO 16-15162.8 CII157.74 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?

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?