Cross-Calibration Between All Three Instruments

Lin Yan, Jason Surace

(Spitzer Science Center)

IntentCheck flux calibration consistency between IRAC 8µm and IRS-SL, MIPS 24um and IRS-LL. Sample Stars: 7 (K, A) Red extragalactic objects: 4 Asteroids: 3Point sources only, mix of blue and red objects.All data processed through S11 or S12. Spectra from Yan, IRAC and MIPS points from Surace, Yan, and Rho.

Stars: HD172728

Stars: HD173511

Stars: HD166780

Stars: HR6348

Stars: HD170693

Stars: HR4138

Stars: HD58142

Mrk279

IRAS 05189-2524

Arp220

Mrk231

Magenta: ISO SWS

Cyan: IRAC 8, MIPS24, IRAS 25

Blue: ISO LWS

Red: MIPS SED

Asteroids: Isara

Asteroids: Geometria

Asteroids: Amalia

Conclusions and Future Plans

• Based on the data for 7 stars + 4 AGN, we found all MIPS 24um fluxes are consistent with the IRS spectra within 10%.

• Comparing IRAC 8um and IRS short low spectra, we found that the consistency is within 10%. This is based on 8 sources which have both IRAC and IRS data. More is needed.

• For red AGNs, consistency is extremely good.