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178 papers
Evidence for Atomic Absorption Features in the High Resolution X-ray Spectrum of the Neutron Star in Puppis A
John Groger, Frits Paerels, Slavko Bogdanov +5
We present evidence for atomic absorption lines in the high-resolution 4-30 A X-ray spectrum of the neutron star RX J0822-4300 in the supernova remnant Puppis A. Comparison with mo…
Noisy Timing Behavior is a Feature of Central Compact Object Pulsars
K. I. Perez, E. V. Gotthelf, J. P. Halpern
We present a timing study of the three known central compact object (CCO) pulsars, isolated cooling neutron stars in supernova remnants, using Chandra, XMM-Newton and NICER observa…
The Proper Motion of the High Galactic Latitude Pulsar Calvera
Michela Rigoselli, Sandro Mereghetti, Jules P. Halpern +2
Calvera (1RXS J141256.0+792204) is a pulsar of characteristic age 285 kyr at a high Galactic latitude of b=+37°, detected only in soft thermal X-rays. We measure a new and precise…
High-Resolution X-Ray Spectroscopy of Interstellar Iron Toward Cygnus X-1 and GX 339-4
Lia Corrales, Eric V. Gotthelf, Efrain Gatuzz +7
We present a high-resolution spectral study of Fe L-shell extinction by the diffuse interstellar medium (ISM) in the direction of the X-ray binaries Cygnus X-1 and GX 339-4, using…
The High Energy X-ray Probe (HEX-P): Magnetars and Other Isolated Neutron Stars
J. A. J. Alford, G. A. Younes, Z. Wadiasingh +23
The hard X-ray emission from magnetars and other isolated neutron stars remains under-explored. An instrument with higher sensitivity to hard X-rays is critical to understanding th…
Broadband X-ray Spectroscopy of the Pulsar Wind Nebula in HESS J1640-465
Moaz Abdelmaguid, Joseph D Gelfand, Eric Gotthelf +1
We present updated measurements of the X-ray properties of the pulsar wind nebula associated with the TeV -ray source HESS J1640-465 derived from Chandra & NuSTAR data. We repor…