Herschel Spectroscopy Crosscalibration

Transcription

1 Herschel Spectroscopy Crosscalibration Herschel Science Centre E.Puga D. Teyssier A. Marston 1

2 Spectral Wavelength Overlap SPIRE leak ~ microns 2

3 Routine Calibration Programmes Post-AGB AFGL 2688 Common calibration sources HSC-DOC CRL 618 AFGL 4106 NGC PN SPIRE Sources Observations Planets, Asteroids Point Sources Planets, Moons and Asteroids SED Scan + Key wavelengths Extended Ep Aqr Extended Orion bar (HD 37041) NGC 6543 (PN) Line Spec + Full Range VY CMa Observations Small DBS Raster R Dor IRC (CW Leo) Other Stars α Boo o-ceti α Cet NGC6302 α Tau Key wavelengths β Peg G34.3 γ Dra NGC 7023 HD Orion KL AA Tau Small OTF Map S140 VY CMa R Dor Extended Sources Line Spec W49N IRC (CW Leo) OtherHCalSG29 Targets E.Puga 3 Arp 220 Mnk 231 Line Spec

4 Common Calibration Monitoring Sources Observation strategy Point Sources SPIRE SPIRE Range Spec A Range Spec B HR Spec Extended Sources CO CO CO CO CO SPIRE SPIRE Range Spec A CO Range Spec B HCalSG29 Full SED E.Puga CO CO CO CII HR Spec

5 Common Calibration Monitoring Sources AFGL 2688 CRL 618 AFGL 4106 NGC 7027 /SPIRE programmes comprise these four sources SPIRE observes them on a regular basis, observed them between Cycles does not contemplate AFGL Are its lines bright enough for sensitivity? Line intensity estimates from /SPIRE observations? AFGL 2688 has not unique coordinates 7.5 CV CAL SPIRE CAL CAL 21:02: :41: :02: :41: :02: :41:37.80 MESS SPIRE MESS STARS 21:02: :41: :02: :41: :02: :41:41.2 Note: not yet scheduled 5

6 Common Calibration Monitoring Sources - AFGL 2688 CRL 618 AFGL 4106 NGC 7027 Non-standard SED mode!!!! 6

7 Calibration and Science Targets Very few sources observed in Spectral Scan have counterpart. HCalSG29 E.Puga /SPIRE match study TBD but conclusion expected to be similar 7

8 Cross-calibration Work: 1) Comparison of isolated lines in all three instruments and work on the integrated flux (W m-2) domain. P.Imhof and Michael Olberg (FTS and SDAG report) vs SPIRE integrated line fluxes in AGBs 8

9 (H-V) integrated flux CO microns (W m-2) SPIRE (M. Barlow) (P. Royer) SPIRE / AFGL E e-16(1.9e-16) (STDDEV 4 measures) 4.7 AFGL E e-17(1.9e-17) ( ) 1.8 AFGL E e-17(1.7e-17) ( ) 2.2 CRL E e-15(5.5e-17) ( ) 3.1 Alpha Ori 1.60E e-17(1.3e-17) ( ) 2.1 CIT6 6.80E e-16(2.0e-17) ( ) 2.4 IK Tau 1.90E-016 Blended. Req mult. line fitting o Ceti 3.30E e-16(3.5e-17) ( ) VY CMa 1.33E-015 Blended. Req mult. line fitting NGC E e-16(3.5e-17) ( , ) 3 2.5E-15(5E-16) ( ) 4.2E-16(1.4E-16)( ) / E-15(3.0e-16)( ) (this work) 1.7E-15(2.4E-16) ( )

10 Cross-calibration Work: 2) Take full range spectroscopy in all three instruments, considering all possible Spectral scans for. Example: IRC SPIRE 750 µm 150 µm +SPIRE by I. 400 µm µm

11 Spectral Scan Sources in HSA Calibration Observations Science Observations IK Tau IRC NGC 7538-IRS1 IRAS AB LDN 1157-B1 NGC 6334I Orion KLCO Orion KLCO OMC-2FIR Orion Bar Orion-S SgrB2(M) SgrB2(N) W51-e1/e2 11

12 Warnings Common Monitoring sources: -: No common line outside leak region. Coordination on source coordinates is very important. ICC lists? Line variation in some AGBs will make multiepoch comparisons very cumbersome. 12

13 Cross-calibration in Sync Set up a TWIKI page Compile existing efforts both from ICCs and users Publish results on Spectroscopy Cross Calibration 13

14 Conclusions Common Monitoring Sources (CMS): observations of AFL 4106 for completion CMS: revisiting? CO µm preliminary comparison shows fair agreement with SPIRE. Expansion of spectral range to include the CO µm and/or [CII] 158 µm on CMS Strong suggestion for and SPIRE observations of already observed sources in Spectral Scan (e.g. IK Tau) 14