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astro-ph2006★ 86 cited
On the Putative Detection of z>0 X-ray Absorption Features in the Spectrum of Markarian 421
Andrew P. Rasmussen, Steven M. Kahn, Frits Paerels +3
In a series of papers, Nicastro et al. have reported the detection of z>0 OVII absorption features in the spectrum of Mrk421 obtained with the Chandra Low Energy Transmission Grati…
astro-ph2004
The continued spectral evolution of the neutron star RX J0720.4-3125
Jacco Vink, Cor de Vries, Mariano Mendez +1
We observed the isolated neutron star RX J720.4-3125 with Chandra's Low Energy Transmission Grating Spectrometer, following the XMM-Newton discovery of long term spectral evolution…