Results 21 to 30 of about 1,428 (186)

GRBs and Lobster Eye X-Ray Telescopes [PDF]

EAS Publications Series, 2013
A large majority of GRBs exhibit X-ray emission. In addition, a dedicated separate group of GRB, the XRFs, exists which emission dominates in the X-ray spectral range. And the third group of GRB related objects (yet hypothetical) are the group of off-axis observed GRBs (orphan afterglows).
R. Hudec, L. Pina, V. Marsikova, A. Inneman   +3 more
openaire   +1 more source

Offline assembly of the lobster-eye x-ray telescope based on optical reference transfer [PDF]

AIP Advances
To address the difficulty of focal alignment and optical axis calibration of lobster-eye x-ray telescopes in the absence of an x-ray vacuum environment, an offline visible-light alignment method based on optical reference transfer under atmospheric ...
Yifan Chen, Zhengda Li, Chengbin Wang, Chen Zhang, Zhixing Ling, Xiaohao Ma, Yixiao Han, Yanfeng Dai, Huaqing Cheng, Yujun Tang, Yulong Xue, Zhiwei Cheng, Wei Fu, Xiaojin Sun   +13 more
doaj   +1 more source

Unbiased CLEAN for STIX in Solar Orbiter

The Astrophysical Journal Supplement Series, 2023
CLEAN is an iterative deconvolution method for radio and hard-X-ray solar imaging. In a specific step of its pipeline, CLEAN requires the convolution between an idealized version of the instrumental point-spread function (PSF), and a map collecting point
Emma Perracchione, Fabiana Camattari, Anna Volpara, Paolo Massa, Anna Maria Massone, Michele Piana   +5 more
doaj   +1 more source

Analytic descriptions of parabolic X-ray mirrors

Journal of Synchrotron Radiation, 2022
On X-ray beamlines and telescopes, glancing-incidence mirrors with parabolic profiles are used to collimate, focus, and collect light. Here, analytic descriptions for paraboloidal, plane-parabolic, and parabolic cylindrical mirrors in several congruent ...
Kenneth A. Goldberg
doaj   +1 more source

The swift x-ray telescope: status and performance [PDF]

SPIE Proceedings, 2007
9 pages, 14 ...
Burrows, D. N., Kennea, J. A., Morris, D. C., Pagani, C., Racusin, J., Abbey, A. F., Beardmore, A., Evans, P. A., Goad, M., Godet, O., Osborne, J. P., Page, K. L., Starling, R. L. C., Tyler, L. G., Willingale, R., Campana, S., Chincarini, G., Moretti, A., Romano, P., Tagliaferri, G., Capalbi, M., Giommi, P., Perri, M., Tamburelli, F., Cusumano, G., Hill, J. E.   +25 more
openaire   +3 more sources

Small Spacecraft Payload Study for X-ray Astrophysics including GRB Science

Universe, 2022
This paper presents microsatellite spacecraft payload study for prompt observation of transient astrophysical objects in X-ray energy range. By combining telescope concepts and miniaturized detectors, the small spacecraft will be able to probe the X-ray ...
Vladimír Dániel, Veronika Maršíková, Rene Hudec, Ladislav Pína, Adolf Inneman, Karel Pelc   +5 more
doaj   +1 more source

Arcus x-ray telescope performance and alignment

UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII, 2023
submitted to SPIE UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII (2023)
Günther, Hans Moritz, Cheimets, Peter, Miller, Eric D., DeRoo, Casey, Smith, Randall K., Ptak, Andrew, Heilmann, Ralf K.   +6 more
openaire   +2 more sources

High Upper Critical Field and Type II Superconductivity in Epitaxial Cubic W2N Thin Films

Advanced Science, EarlyView.
Superconducting thin films of stoichiometric W2N demonstrate a high upper critical field (Hc2) of ∼ 8.5 T, uncommon among binary transition metal nitrides. This robust superconducting response under high magnetic fields highlights the technological relevance of W2N for superconducting applications, e.g., integrated quantum and cryogenic electronics ...
Aditya Singh, Arnaud le Febvrier, Sanath Kumar Honnali, Abhisek Mishra, Grzegorz Greczynski, Subhankar Bedanta, Per Eklund, Ajay Soni   +7 more
wiley   +1 more source

A Comprehensive Comparison of Spin-up and Spin-down Episodes of 4U 1538-522 Observed with NuSTAR

The Astrophysical Journal
4U 1538-522 is a persistent high-mass X-ray binary that exhibits secular spin evolution. In 2019, it underwent a torque reversal from spinning up to spinning down.
Yongfeng Hu, Long Ji, Cong Yu, Lili Yang
doaj   +1 more source

X-ray Data Analysis to Search for Magnetar Candidates in the Galactic Plane

Journal of Astronomy and Space Sciences, 2018
We report on our Galactic plane searches for magnetars in the archival Chandra X-ray Observatory (CXO) data. We summarize the properties of known magnetars and use them to establish a procedure for magnetar searches.
Woochan Park, Hongjun An
doaj   +1 more source