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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 19 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1973

Stellar X-ray polarimetry on OSO-1

The importance of stellar X-ray polarimetry is reviewed. A graphite crystal polarimeter sensitive near 2.6 and 5.2 keV which was designed for the OSO-1 satellite is described. The instrument's predicted performance for many stellar X-ray sources is presented, and the fundamental questions that can be resolved with the OSO-1 polarimeter are considered. The sensitivity of the instrument is such that, during an observation time of 24 hours, the polarization of the Crab nebula can be measured with an accuracy of 0.6 percent.

Landecker, P. B.↗
NASA NTRS1973

The radiation monitor cosmic X-ray experiment OSO-1

A comprehensive technical description is presented of the Radiation Monitor which is part of the GSFC cosmic X-ray experiment to be flown on the OSO-1 satellite. The theory of operation, fabrication and assembly, and cone angle determination are reported.

Randall, R. F.↗
NASA NTRS1973

Goddard cosmic X-ray experiment for OSO-1

The primary objective of this experiment is to utilize proportional counters of multi-anode multi-layer construction to obtain the spectra of X-ray sources and the diffuse background over the 2 to 60 keV band. Possible broad emission lines, absorption, and spectral breaks in both discrete sources and the diffuse background will be investigated. A schematic representation of this experiment as configured for the OSO-1 wheel and characteristic parameters are summarized.

Boldt, E. A.↗
NASA NTRS1963

SCIENTIFIC RESULTS OF OSO-1

Design characteristics, instrumentation and experimental results of the orbiting solar observatory i

SPACECRAFT DESIGN↗
NASA NTRS1973

Stellar Bragg crystal X-ray spectrometry on OSO-1

A high sensitivity crystal X-ray spectrometer for use on the Orbiting Solar Observatory (mission 1) satellite is described. This instrument will be used to obtain both solar and stellar spectra in the energy range 2 to 8 keV. In the stellar mode, the shape of the continua, the strength of lines, and the strength of recombination and absorption edge were determined. If lines or edges are detected, such data will provide direct evidence regarding the physical conditions in the emitting and absorbing regions. If only upper bounds are established, the data can be used to constrain theoretical models. In any case, precise continuum shapes will be established for a number of the brighter X-ray sources. Numerical estimates of the sensitivity of the instrument for these various purposes are given.

Landecker, P. B.↗
NASA NTRS1975

OSO-1 final program report

The performance of the OSO-I control subsystem is described. On orbit telemetry data was compared with the system specifications and the results were tabulated. Wherever possible, the GMT time of the occurrence of the data used to describe the performance is given for cross reference purposes. Extensive comments are also included to assist in the interpretation of the data.

Source record↗
NASA NTRS1972

Design of a celestial Thomson-scattering X-ray polarimeter.

A general discussion of the scientific importance and status of stellar X-ray polarimetry is presented. A stellar X-ray polarimeter designed to fit into the bottom half of the NASA OSO-1 wheel compartment or other similar spacecraft is described. In this design, the linear polarization is obtained as a function of energy. The sensitivity of the polarimeter in the 4-24 keV energy range was optimized with the aid of a Monte Carlo simulation computer program and is given for several important celestial X-ray sources. Estimates of sensitivity thresholds for a much larger polarimeter, suitable for flight in the NASA High-Energy Astronomy Observatory (HEAO), are also given. The minimum detectable polarization for several X-ray sources is given.

Landecker, P. B.↗