The Calibration of the EUVE Spectrometers. I. Wavelength Calibration and Resolution

Details The Calibration of the EUVE Spectrometers. I. Wavelength Calibration and Resolution The Calibration of the EUVE Spectrometers. I. Wavelength Calibration and Resolution

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apjs..107..451a&link_type=abstract

Astrophysical Journal Supplement v.107, p.451

Astronomy and Astrophysics

Astronomy

28

Instrumentation: Spectrographs, Methods: Data Analysis, Ultraviolet: General

Scientific paper

We describe the wavelength calibration of the Extreme Ultraviolet Explorer (EUVE) spectrometers and measurements of the spectrometers' resolution. The three spectrometers operate in the wavelength range from 70 to 760 Å with a resolving power of ˜300. We present the equations required to map each detected photon to a wavelength and imaging angle. The equations depend on the position of the source on the sky, the orientation of the spacecraft when the photon arrives, and the position on the EUVE detectors where the photon arrives. These equations were determined using a ray-traced model of the EUVE spectrometers along with measurements of emission lines and continua obtained both in prelaunch laboratory calibration and from observations of stellar sources while in orbit.
We describe the procedures used to apply the equations in this paper to actual spectrometer data. We also discuss the implications of the results of this calibration for the analysis of the spectral images and suggest aperture sizes for spectral extraction.
With this calibration, we can remap detected photons with rms errors of 0.22 resolution elements (0.11 Å) in the short wavelength (SW) spectrometer, 0.13 elements (0.13 Å) in the medium wavelength (MW) spectrometer, and 0.13 elements (0.25 Å) in the long wavelength (LW) spectrometer. The imaging angles for any one observation have rms errors of 4".8 (1.1 pixel) in the SW spectrometer, 3".3 (0.7 pixel) in the MW spectrometer, and 2".9 (0.6 pixel) in the LW spectrometer.

Affiliated with

Also associated with

No associations

Rating

The Calibration of the EUVE Spectrometers. I. Wavelength Calibration and Resolution does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Calibration of the EUVE Spectrometers. I. Wavelength Calibration and Resolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Calibration of the EUVE Spectrometers. I. Wavelength Calibration and Resolution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1146598