X-Ray Spectra from Three Cosmic Sources

X-Ray Spectra from Three Cosmic Sources

Three cosmic x-ray sources have been observed from a water-launched rocket carrying two x-ray detectors to an altitude of 200 kilometers. The x-ray spectra, measured in the photon energy range between 1 and 40 kiloelectron volts, are all different. The sources in order of hardness of spectra are Cyg...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1966-06, Vol.152 (3728), p.1499-1504
Hauptverfasser: Grader, R. J., Hill, R. W., Seward, F. D., Toor, A.
Format: Artikel
Sprache:eng
Schlagworte:
Astrophysics and Cosmology
Azimuth
Collimation
Nebulae
Photons
PHYSICS
Proportional counters
Scintillation counters
Spectral resolution
Stretchers
Vehicular flight
X ray spectrum
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Zusammenfassung:Three cosmic x-ray sources have been observed from a water-launched rocket carrying two x-ray detectors to an altitude of 200 kilometers. The x-ray spectra, measured in the photon energy range between 1 and 40 kiloelectron volts, are all different. The sources in order of hardness of spectra are Cyg XR-1, Tau XR-1, and Sco XR-1. The intensity of Sco XR-1 decreased at low photon energies. The differences in spectra might be interpreted as evidence of different source mechanisms.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.152.3728.1499