Volume 423, Number 3, September I 2004
|Page(s)||1045 - 1050|
|Section||Stellar structure and evolution|
|Published online||12 August 2004|
Spectral and timing properties of the X-ray emission from the millisecond pulsar PSR B1821-24
Istituto di Astrofisica Spaziale e Fisica Cosmica, INAF-CNR, Sezione di Palermo, via Ugo La Malfa 153, 90146 Palermo, Italy e-mail: email@example.com
2 Dipartimento di Fisica, Universitá La Sapienza, Piazzale A. Moro 2, 00185 Roma, Italy
3 Istituto di Astrofisica Spaziale e Fisica Cosmica, INAF-CNR, Sezione di Roma, via Fosso del Cavaliere, 00113 Roma, Italy
4 Max-Planck-Institut für Extraterrestrische Physik, 85740 Garching-bei-München, Germany
Accepted: 27 April 2004
We report results on the timing and spectral analysis of observations of the millisecond pulsar PSR B1821-24 with RXTE, BeppoSAX and Chandra. The X-ray light curve is characterized by two narrow peaks at a phase distance of . The average pulsed emission, over the range 1.6–20 keV, is well represented by a single power law with a photon index and unabsorbed (2–10 keV) pulsed X-ray flux of erg cm-2 s-1. We searched for a possible bunching of X-ray photons to verify if the X ray emission has a time structure similar to that of giant pulses and found a negative result.
Key words: stars: neutron / stars: pulsars: general / stars: pulsars: individual: PSR B1821-24 / X-rays: stars
© ESO, 2004
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