Si XIII and Si XIV line emission search with the ANS crystal spectrometer.
Abstract
The final results of the search for Si XIII and Si XIV line emission, using the ANS Bragg crystal spectrometer, are presented. No positive line detection was achieved in any of the measurements made on several types of cosmic object; i.e., a transient X-ray source, close binary systems, supernova remnants, GX sources, and clusters of galaxies. Three-sigma upper limits for discrete line emission from these objects are reported and compared with line strengths inferred from other proportional-counter and Bragg spectrometer data. The present upper limit of 1.0 eV for the equivalent width of a narrow Si XIV line emission from the X-ray nova A0620-00 is an order of magnitude lower than previous limits set by other experiments.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1978
- DOI:
- 10.1086/156632
- Bibcode:
- 1978ApJ...226..486P
- Keywords:
-
- Astronomical Spectroscopy;
- Emission Spectra;
- Silicon;
- X Ray Sources;
- Astronomical Catalogs;
- Calibrating;
- Crab Nebula;
- Line Spectra;
- Spectrometers;
- X Ray Stars;
- Astronomy;
- Emission Lines:X-Ray Sources;
- Spectrometers:X Rays;
- X-Ray Sources:X-Ray Spectra