The Distances of SNRs Kes 69 and G21.5-0.9 from HI and 13CO Spectra (2008)
We obtain new HI and $^{13}$CO images around Supernova Remnants (SNR) Kes 69 and G21.5-0.9. By comparing HI spectra with $^{13}$CO emission spectra, we significantly revise the kinematic distance for...
Constraints on the Properties of the Neutron Star XTE J1814-338 from Pulse Shape Models (2008)
Leahy, Denis A., Morsink, Sharon M., Chung, Yi-Ying, Chou, Yi
The accretion-powered (non-X-ray burst) pulsations of XTE J1814-338 are modeled to determine neutron star parameters and their uncertainties. The model is a rotating circular hot spot and includes:...
The Distance of the SNR Kes 75 and PWN PSR J1846-0258 System (2007)
The supernova remnant (SNR) Kes 75/PSR J1846-0258 association can be regarded as certain due to the accurate location of young PSR J1846-0258 at the center of Kes 75 and the detected bright...
We revise the distance estimate to the supernova remnant (SNR) G109.1-1.0 (CTB 109) and its associated anomalous X-ray pulsar (AXP) 1E 2259+586 by re-analyzing both 408 and 1420 MHz continuum images,...
The Distance and Age of the SNR Kes 73 and AXP 1E 1841-045 (2007)
We provide a new distance estimate to the supernova remnant (SNR) Kes 73 and its associated anomalous X-ray pulsar (AXP) 1E 1841-045. 21 cm HI images and HI absorption/ emission spectra from new VLA...
The Distances of SNR W41 and overlapping HII regions (2007)
New HI images from the VLA Galactic Plane Survey show prominent absorption features associated with the supernovae remnant G23.3-0.3 (SNR W41). We highlight the HI absorption spectra and the...
Limits on Mass and Radius for the ms-Period X-ray Pulsar SAX J1808.4-3658 (2007)
Leahy, Denis A., Morsink, Sharon M., Cadeau, Coire
SAX J1808.4-3658 has a 2.5 millisecond neutron star rotation period and exhibits X-ray pulsations due to its rotating hot spot. Here we present an analysis of the pulse shapes of SAX J1808 during its...
The Oblate Schwarzschild Approximation for Light Curves of Rapidly Rotating Neutron Stars (2007)
Morsink, Sharon M., Leahy, Denis A., Cadeau, Coire, Braga, John
We present a simple method for including the oblateness of a rapidly rotating neutron star when fitting X-ray light curves. In previous work we showed that the oblateness induced by rotation at...