The Diffuse X-ray Spectrometer shuttle package

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The Diffuse X-ray Spectrometer shuttle package

The Diffuse X-Ray Spectrometer (DXS) experiment was built by the University of Wisconsin-Madison and flown as an attached payload in the January 1993 flight of Space Shuttle Endeavor (STS-54). The DXS’s main scientific goal was to obtain spectra of the diffuse soft X-ray background.

Mission Characteristics

Lifetime	13–19 Jan 1993
Special Features	Measured all portions of the spectrum simultaneously, eliminating the problem in conventional Bragg spectrometers of false features being introduced by a time-varying background.

Lifetime

13–19 Jan 1993

Special Features

Measured all portions of the spectrum simultaneously, eliminating the problem in conventional Bragg spectrometers of false features being introduced by a time-varying background.

Payload

Instrument	Characteristic	Details
Bragg crystal spectrometer	Energy Range	0.15–0.28 keV
	Wavelength	43–84 Å
	Field of View	15° (FWHM)
	Spectral Resolution	2.7 Å
	2 large area spectrometers each backed onto a position-sensitive proportional counter. The detectors were mounted on opposite sides of the shuttle cargo bay. During the 80 orbit nights, the detectors repeatedly scanned the same arc on the sky — within 10° of the galactic plane from longitudes 150–300°.

Energy Range

0.15–0.28 keV

Wavelength

43–84 Å

Field of View

15° (FWHM)

Spectral Resolution

2.7 Å

2 large area spectrometers each backed onto a position-sensitive proportional counter. The detectors were mounted on opposite sides of the shuttle cargo bay. During the 80 orbit nights, the detectors repeatedly scanned the same arc on the sky — within 10° of the galactic plane from longitudes 150–300°.

Science Highlights

First-ever high resolution spectra of the diffuse soft X-ray background in the energy band from 0.15–0.28 keV (43–84 Å).

NASA | GSFC | Sciences and Exploration

HEASARC

High Energy Astrophysics Science Archive Research Center

The Diffuse X-ray Spectrometer shuttle package

Mission Characteristics

Payload

Bragg crystal spectrometer

Science Highlights

Archive

Active Missions

Past Missions

The Diffuse X-ray Spectrometer shuttle package

Mission Characteristics

Payload

Bragg crystal spectrometer

Science Highlights

Archive