Transient structure in the high-energy X-ray light curve of NP 0532
Abstract
ON 1974 June 21 we observed the Crab Nebula with a balloon-borne X-ray telescope (20-150 keV) with a sensitive area of ~700 cm2. The observations took place between UT 54112 S and 78520 S. At times during this period a transitory third peak was observed in the light curve of NP0532, which we have reported earlier10. The peak comprised 2.0+/-0.5% of the total emission from the Crab, and was detectable for ~5 min on two occasions (~40 min apart). We also report pulsed fractions in the primary and secondary peaks, and in the interpulse region.
- Publication:
-
Nature
- Pub Date:
- March 1977
- DOI:
- 10.1038/266431a0
- Bibcode:
- 1977Natur.266..431R
- Keywords:
-
- Crab Nebula;
- Light Curve;
- Pulsars;
- Transient Response;
- X Ray Astronomy;
- Balloon Sounding;
- Emission Spectra;
- Pulsed Radiation;
- Spectral Energy Distribution;
- Statistical Analysis;
- X Ray Spectra;
- X Ray Telescopes;
- Astrophysics