Search for X-ray pulsation from rotation-powered pulsars with ASCA
Abstract
We observed 8 pulsars with high spin down flux and searched for pulsation in the X-ray band (0.6-10 keV) with ASCA. We detected X-ray emission from all pulsars, including new detection in the 2-10 keV band for 3 pulsars. We also found pulsed emission from 3 pulsars including the first detection of millisecond pulsar PSR B1821-24 [1]. The pulse of PSR B1821-24 has sharp double peaks similar to that of the Crab pulsar and power-law spectrum which strongly suggest the magnetospheric origin. We found an empirical relation between the pulsed luminosity LX(pulse) and the rotation energy loss Ėrot in the X-ray band among all X-ray pulsars observed with ASCA. The pulsed luminosity is consistent with the relation LX(pulse)~Ėrot3/2, while those for the pulsed emission in γ-ray band Lγ(pulse) is Lγ(pulse)~Ėrot1/2. It should be noted that the empirical relation in the X-ray band holds also for the millisecond pulsar PSR B1821-24, which suggests same pulse emission mechanism works for millisecond pulsars.
- Publication:
-
Proceedings of the Fourth Compton Symposium
- Pub Date:
- May 1997
- DOI:
- 10.1063/1.54137
- Bibcode:
- 1997AIPC..410..628S
- Keywords:
-
- 97.60.Gb;
- 95.85.Nv;
- 97.10.Ri;
- 98.70.Rz;
- Pulsars;
- X-ray;
- Luminosities;
- magnitudes;
- effective temperatures colors and spectral classification;
- gamma-ray sources;
- gamma-ray bursts