Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-04-02
Astronomy and Astrophysics, Volume 467, Issue 2, May IV 2007, pp.L45-L48
Astronomy and Astrophysics
Astrophysics
Revised version (minor changes in text and figures). Accepted for publication on Astronomy and Astrophysics Letters on 10/04/2
Scientific paper
10.1051/0004-6361:20077480
We present the first X-ray detection of the very young pulsar PSR J1357-6429 (characteristic age of 7.3 kyr) using data from the XMM-Newton and Chandra satellites. We find that the spectrum is well described by a power-law plus blackbody model, with photon index Gamma=1.4 and blackbody temperature kT=160 eV. For the estimated distance of 2.5 kpc, this corresponds to a 2-10 keV luminosity of about 1.2E+32 erg/s, thus the fraction of the spin-down energy channeled by PSR J1357-6429 into X-ray emission is one of the lowest observed. The Chandra data confirm the positional coincidence with the radio pulsar and allow to set an upper limit of 3E+31 erg/s on the 2-10 keV luminosity of a compact pulsar wind nebula. We do not detect any pulsed emission from the source and determine an upper limit of 30% for the modulation amplitude of the X-ray emission at the radio frequency of the pulsar.
de Luca Andrea
Esposito Paolo
Mattana Fabio
Tiengo Andrea
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