Absolute physical calibration in the infrared

George H. Rieke, M. Blaylock, L. Decin, C. Engelbracht, P. Ogle, E. Avrett, J. Carpenter, R. M. Cutri, L. Armus, K. Gordon, R. O. Gray, J. Hinz, K. Su, Christopher N A Willmer

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

We determine an absolute calibration for the Multiband Imaging Photometer for Spitzer 24 μm band and recommend adjustments to the published calibrations for Two Micron All Sky Survey (2MASS), Infrared Array Camera (IRAC), and IRAS photometry to put them on the same scale. We show that consistent results are obtained by basing the calibration on either an average A0V star spectral energy distribution (SED), or by using the absolutely calibrated SED of the Sun in comparison with solar-type stellar photometry (the solar analog method). After the rejection of a small number of stars with anomalous SEDs (or bad measurements), upper limits of 1.5% root mean square (rms) are placed on the intrinsic infrared (IR) SED variations in both A-dwarf and solar-type stars. These types of stars are therefore suitable as general-purpose standard stars in the IR. We provide absolutely calibrated SEDs for a standard zero magnitude A star and for the Sun to allow extending this work to any other IR photometric system. They allow the recommended calibration to be applied from 1 to 25 μm with an accuracy of 2%, and with even higher accuracy at specific wavelengths such as 2.2, 10.6, and 24 μm, near which there are direct measurements. However, we confirm earlier indications that Vega does not behave as a typical A0V star between the visible and the IR, making it problematic as the defining star for photometric systems. The integration of measurements of the Sun with those of solar-type stars also provides an accurate estimate of the solar SED from 1 through 30 μm, which we show agrees with theoretical models.

Original languageEnglish (US)
Pages (from-to)2245-2263
Number of pages19
JournalAstronomical Journal
Volume135
Issue number6
DOIs
StatePublished - Jun 1 2008

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calibration
stars
spectral energy distribution
energy
sun
photometer
photometry
wavelength
A stars
distribution
Infrared Astronomy Satellite
rejection
photometers
indication
adjusting
cameras
analogs
estimates
wavelengths
comparison

Keywords

  • Stars: fundamental parameters
  • Sun: infrared
  • Techniques: photometric

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Rieke, G. H., Blaylock, M., Decin, L., Engelbracht, C., Ogle, P., Avrett, E., ... Willmer, C. N. A. (2008). Absolute physical calibration in the infrared. Astronomical Journal, 135(6), 2245-2263. https://doi.org/10.1088/0004-6256/135/6/2245

Absolute physical calibration in the infrared. / Rieke, George H.; Blaylock, M.; Decin, L.; Engelbracht, C.; Ogle, P.; Avrett, E.; Carpenter, J.; Cutri, R. M.; Armus, L.; Gordon, K.; Gray, R. O.; Hinz, J.; Su, K.; Willmer, Christopher N A.

In: Astronomical Journal, Vol. 135, No. 6, 01.06.2008, p. 2245-2263.

Research output: Contribution to journalArticle

Rieke, GH, Blaylock, M, Decin, L, Engelbracht, C, Ogle, P, Avrett, E, Carpenter, J, Cutri, RM, Armus, L, Gordon, K, Gray, RO, Hinz, J, Su, K & Willmer, CNA 2008, 'Absolute physical calibration in the infrared', Astronomical Journal, vol. 135, no. 6, pp. 2245-2263. https://doi.org/10.1088/0004-6256/135/6/2245
Rieke GH, Blaylock M, Decin L, Engelbracht C, Ogle P, Avrett E et al. Absolute physical calibration in the infrared. Astronomical Journal. 2008 Jun 1;135(6):2245-2263. https://doi.org/10.1088/0004-6256/135/6/2245
Rieke, George H. ; Blaylock, M. ; Decin, L. ; Engelbracht, C. ; Ogle, P. ; Avrett, E. ; Carpenter, J. ; Cutri, R. M. ; Armus, L. ; Gordon, K. ; Gray, R. O. ; Hinz, J. ; Su, K. ; Willmer, Christopher N A. / Absolute physical calibration in the infrared. In: Astronomical Journal. 2008 ; Vol. 135, No. 6. pp. 2245-2263.
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