Nicholas E. Thomas

Polished titanium substrates for x-ray mirrors

Russell Roberts, M. Galeazzi, K. D. Küntz, Rousseau Nutter et autres

The fabrication of x-ray mirrors requires achieving ultra-flat, low surface roughness substrates for high x-ray reflectivity. The fabrication pipeline presented here involves commercial sheets of Ti-6Al-4V (Ti64) that are initially flattened through restrained stress relief annealing. These sheets are then polished using …

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IXPE observation of the low-synchrotron peaked blazar S4 0954+65 during an optical-X-ray flare

Pouya M. Kouch, Ioannis Liodakis, Francesco Fenu, H. C. Zhang et autres

The X-ray polarization observations, made possible with the Imaging X-ray Polarimetry Explorer (IXPE), offer new ways of probing high-energy emission processes in astrophysical jets from blazars. Here, we report the first X-ray polarization observation of the blazar S4 0954+65 in a high …

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Evidence for a shock-compressed magnetic field in the northwestern rim of Vela Jr. from X-ray polarimetry

Д. А. Прохоров, Yi-Jung Yang, Riccardo Ferrazzoli, Jacco Vink et autres

Synchrotron X-ray emission has been detected from nearly a dozen young supernova remnants (SNRs). X-rays of synchrotron origin exhibit linear polarization in a regular, non-randomly oriented magnetic field. The significant polarized X-ray emission from four such SNRs has already been reported on …

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SuperHERO (Super-High Energy Replicated Optics) balloon mission concept

Nicholas E. Thomas

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Analysis of Crab X-ray Polarization using Deeper IXPE Observations

Josephine Wong, Tsunefumi Mizuno, N. Bucciantini, Roger W. Romani et autres

We present Crab X-ray polarization measurements using IXPE data with a total exposure of 300ks, three times more than the initial 2022 discovery paper. Polarization is detected in three times more pulsar phase bins, revealing an S-shaped $+40^\circ$ polarization angle sweep in …

Cygnus X-3 revealed as a Galactic ultraluminous X-ray source by IXPE

Alexandra Veledina, Fabio Muleri, Juri Poutanen, Jakub Podgorný et autres

fi, se, it, fr, cz, de, us, gb, pl, ru, es, in, jp, ca, hk (code pays fourni par la source)

Complex rotational dynamics of the neutron star in Hercules X-1 revealed by X-ray polarization

Jeremy Heyl, Victor Doroshenko, Denis González–Caniulef, Ilaria Caiazzo et autres

ca, de, fr, us, fi, gb, it, ch, es, cz, jp, ru, hk, nl (code pays fourni par la source)

Discovery of a Shock-compressed Magnetic Field in the Northwestern Rim of the Young Supernova Remnant RX J1713.7–3946 with X-Ray Polarimetry

Riccardo Ferrazzoli, Dmitry Prokhorov, N. Bucciantini, Patrick Slane et autres

Abstract Supernova remnants (SNRs) provide insights into cosmic-ray acceleration and magnetic field dynamics at shock fronts. Recent X-ray polarimetric measurements by the Imaging X-ray Polarimetry Explorer (IXPE) have revealed radial magnetic fields near particle acceleration sites in young SNRs, including Cassiopeia A, …

it, tw, nl, us, cn, hk, de, ca, fr, jp, es, cz, ru, fi, gb (code pays fourni par la source)

Pulsar-wind-nebula-powered Galactic center X-ray filament G0.13–0.11

E. Churazov, Ildar Khabibullin, Thibault Barnouin, N. Bucciantini et autres

We report the discovery of X-ray polarization from the X-ray-bright filament G0.13−0.11 in the Galactic center (GC) region. This filament features a bright, hard X-ray source that is most plausibly a pulsar wind nebula (PWN) and an extended and structured diffuse component. …

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First detection of polarization in X-rays for PSR B0540-69 and its nebula

Fei Xie, Josephine Wong, Fabio La Monaca, Roger W. Romani et autres

We report on X-ray polarization measurements of the extra-galactic Crab-like PSR B0540-69 and its Pulsar Wind Nebula (PWN) in the Large Magellanic Cloud (LMC), using a ~850 ks Imaging X-ray Polarimetry Explorer (IXPE) exposure. The PWN is unresolved by IXPE. No statistically …

X-Ray Polarimetry of the Dipping Accreting Neutron Star 4U 1624-49

M. Lynne Saade, P. Kaaret, Juri Poutanen, S. Bianchi et autres

We present the first X-ray polarimetric study of the dipping accreting neutron star 4U 1624$-$49 with the Imaging X-ray Polarimetry Explorer (IXPE). We report a detection of polarization in the non-dip time intervals with a confidence level of 99.99%. We find an …

Pulsar-wind-nebula-powered Galactic center X-ray filament G0.13-0.11: Proof of the synchrotron nature by IXPE

E. Churazov, Ildar Khabibullin, Thibault Barnouin, N. Bucciantini et autres

We report the discovery of X-ray polarization from the X-ray-bright filament. G0.13-0.11 in the Galactic center (GC) region. This filament features a bright, hard X-ray source that is most plausibly a pulsar wind nebula (PWN) and an extended and structured diffuse component. …

ru, de, fr, it, us, cz, cn, es, jp, ca, gb, hk (code pays fourni par la source)