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Title: THE ABSOLUTE CALIBRATION OF THE EUV IMAGING SPECTROMETER ON HINODE

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.
Authors:
 [1] ;  [2] ;  [3]
  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)
Publication Date:
OSTI Identifier:
22340200
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal, Supplement Series; Journal Volume: 213; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ATOMIC PHYSICS; CALIBRATION; EMISSION; EXTREME ULTRAVIOLET RADIATION; RADIANT FLUX DENSITY; SENSITIVITY; SPECTROMETERS; TIME DEPENDENCE; WAVELENGTHS