Physics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop..811c&link_type=abstract
ATNF proposal P509, Semester: April, 2007
Physics
Galactic, Parkes
Scientific paper
We have been timing the very young pulsar PSR J1833-1034, recently discovered near the center of the supernova remnant (SNR) G21.5-0.9 (Camilo et al. 2006). With 16 months of timing data in hand we have confirmed that the pulsar is coincident, to sub-arcsec precision, with the centrally-peaked X-ray source visible in Chandra data near the center of G21.5-0.9 and have therefore confirmed this pulsar-SNR association beyond any doubt. More unexpectedly, we have been able to measure this pulsar's braking index, n = 2.18, only the 6th such phase-coherent measurement done in over 1700 pulsars known. We now have a chance to measure the "second braking index" and place further constraints on the spin-down law obeyed by this pulsar. This has been done to date for only 2 pulsars. Finally, we wish to continue timing this pulsar because it will be one of the prime candidates for gamma-ray detection with the GLAST satellite to be launched in 2007, and in order to do so we must maintain its timing solution. For these reasons we request 24 hr for timing PSR J1833-1034 during the present semester.
Camilo Fernando
Gaensler Bryan
Lorimer Duncan Ross
Manchester Dick
Ransom Scott
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