Issue |
A&A
Volume 423, Number 3, September I 2004
|
|
---|---|---|
Page(s) | 1045 - 1050 | |
Section | Stellar structure and evolution | |
DOI | https://doi.org/10.1051/0004-6361:20047192 | |
Published online | 12 August 2004 |
Spectral and timing properties of the X-ray emission from the millisecond pulsar PSR B1821-24
1
Istituto di Astrofisica Spaziale e Fisica Cosmica, INAF-CNR, Sezione di Palermo, via Ugo La Malfa 153, 90146 Palermo, Italy e-mail: mineo@pa.iasf.cnr.it
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
Received:
4
February
2004
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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