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Schnopper, H. W.

Publications and source records attributed to Schnopper, H. W..

At least 55 records · Page 3
All sourcesNASA NTRSDOE OSTI
NASA NTRS1973

Observations of Taurus X-1 by the 1-60 keV X-ray detector on the OSO-7.

The seventh Orbiting Solar Observatory, OSO-7, carries an X-ray detector for measuring the positions, spectra, and time variations of X-ray sources in the energy range from 1 to 60 keV. The instrument has operated successfully since the launch on 1971 September 29. The purpose of this paper is to describe the instrument and to report a measurement of the spectrum of Tau X-1 based on data covering the widest energy range that has so far been observed in a single experiment.

Clark, G. W.↗
NASA NTRS1973

Extended X-ray and radio observations of Scorpius X-1.

A 23-day observation reveals temporal variations at energies of 3-10 keV similar to those found in previous optical data. However, there is no evidence of more than one preferred intensity level or of an intensity threshold for flares. We rule out X-ray periodicities containing more than 5 per cent of the mean quiescent-period intensity with periods of from 6 minutes to 4 hours. The X-ray intensity is strongly correlated with hardness but is not correlated with radio data collected over eight days.

Canizares, C. R.↗
NASA NTRS1969

Polarimeter for celestial X rays.

Polarimeter using 45 degree Bragg angle reflection applied to rocket payload design for determining polarization of celestial sources X rays

Kalata, K.↗
NASA NTRS1969

Dual purpose optical instrument capable of simultaneously acting as spectrometer and diffractometer

A dual purpose optical instrument is described capable of simultaneously acting as a spectrometer and diffractometer to respectively perform elemental and structural analysis of an unknown sample. The diffractometer portion of the instrument employs a modified form of Seeman-Bohlin focusing which involves providing a line source of X-rays, a sample, and a detector, all on the same focal circle. The spectrometer portion of the instrument employs a fixedly mounted X-ray energy detector mounted outside of the plane of the focal circle.

Dasgupta, K.↗