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The Puzzles of RX J1856.5-3754: Neutron Star or Quark Star?
J. E. Truemper, V. Burwitz, F. Haberl +1
We discuss recent Chandra and XMM-Newton observations of the bright isolated neutron star RX J1856.5-3754 and suggest that the absence of any line features is due to effects of a h…
A phase-dependent absorption line in the spectrum of the X-ray pulsar RX J0720.4-3125
F. Haberl, V. E. Zavlin, J. Truemper +1
The XMM-Newton spectra of the isolated neutron star RX J0720.4-3125 show deviations from a Planckian energy distribution below 400 eV, similar to the spectra of RBS1223, another lo…
The thermal radiation of the isolated neutron star RX J1856.5-3754 observed with Chandra and XMM-Newton
V. Burwitz, F. Haberl, R. Neuhaeuser +3
We present results of the analysis of data collected in 57-ks XMM-Newton and 505-ks Chandra observations of the nearby ~= 120 pc isolated neutron star RX J1856.5-3754. We confirm m…
New Limits on Gravitational Radiation using Pulsars
A. N. Lommen
We calculate a new gravitational wave background limit using timing residuals from PSRs J1713+0747, B1855+09, and B1937+21. The new limit is based on 17 years of continuous data pi…
ROSAT observations of PSR 2334+61 in the supernova remnant G114.3+0.3
W. Becker, K. T. S. Barzier, J. Trümper
We report on the observation of PSR 2334+61 in the soft X-ray domain with ROSAT. Assuming a power-law spectrum with photon-index we derive an X-ray flux…