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CALIBRATION AND THE CRAB NEBULA
A SEARCH FOR SOFT STELLAR XRAY SOURCES
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aspect solution Binary Stars binary systems bremsstrahlung buffer amplifiers Bunner calibrate charge amplifier CM CM collimator column density coronae counting rate Crab Nebula density lower limits detected detector diffuse background diffuse x-ray background energy diffuse x-ray field of view flare stars gain galactic latitudes giant stars Gleise Gorenstein and Tucker high energy hydrogen I I I I I I I I I I I I I I I I I I I I I interstellar gas interstellar medium l0 pc low energy diffuse main sequence stars number density optical depth orbit photons proportional counters pulse height rv rv rv S-l50 experiment scale height scanned soft x-ray background soft x-ray emission soft x-ray sources space density spectral type spectrum SS Cygni star sensors Strittmatter subgiant UJ UJ veto counters x-ray flux