THE ABSOLUTE CALIBRATION OF THE EUV IMAGING SPECTROMETER ON HINODE

Journal Article · Tue Jul 01 04:00:00 EDT 2014 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/213/1/11· OSTI ID:22340200

Warren, Harry P. ^[1]; Ugarte-Urra, Ignacio ^[2]; Landi, Enrico ^[3]

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1. Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States)
2. College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States)
3. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109 (United States)

We investigate the absolute calibration of the EUV Imaging Spectrometer (EIS) on Hinode by comparing EIS full-disk mosaics with irradiance observations from the EUV Variability Experiment on the Solar Dynamics Observatory. We also use extended observations of the quiet corona above the limb combined with a simple differential emission measure model to establish new effective area curves that incorporate information from the most recent atomic physics calculations. We find that changes to the EIS instrument sensitivity are a complex function of both time and wavelength. We find that the sensitivity is decaying exponentially with time and that the decay constants vary with wavelength. The EIS short wavelength channel shows significantly longer decay times than the long wavelength channel.

• OSTI ID: 22340200
• Journal Information: Astrophysical Journal, Supplement Series, Journal Name: Astrophysical Journal, Supplement Series Journal Issue: 1 Vol. 213; ISSN 0067-0049; ISSN APJSA2
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ATOMIC PHYSICS
CALIBRATION
EMISSION
EXTREME ULTRAVIOLET RADIATION
RADIANT FLUX DENSITY
SENSITIVITY
SPECTROMETERS
TIME DEPENDENCE
WAVELENGTHS