Results 121 to 130 of about 2,078,750 (288)

Simultaneous X-Ray and Optical Polarization Observations of the Blazar Mrk 421

open access: yesThe Astrophysical Journal
We present near-simultaneous X-ray and optical polarization measurements in the high synchrotron peaked (HSP) blazar Mrk 421. The X-ray polarimetric observations were carried out using Imaging X-ray Polarimetry Explorer (IXPE) on 2023 December 6.
Athira M. Bharathan   +9 more
doaj   +1 more source

XIAO: a soft x-ray telescope for the SVOM mission [PDF]

open access: green, 2008
S. Mereghetti   +25 more
openalex   +1 more source

2FHL J1745.1–3035: A Newly Discovered, Powerful Pulsar Wind Nebula Candidate

open access: yesThe Astrophysical Journal
We present a multi-epoch, multi-observatory X-ray analysis for 2FHL J1745.1–3035, a newly discovered very high-energy Galactic source detected by the Fermi Large Area Telescope (LAT) located in close proximity to the Galactic Center ( l = 358.°5319; b = −
S. Marchesi   +10 more
doaj   +1 more source

Broad band X-ray telescope (BBXRT) [PDF]

open access: yes
An approach along with corroborating measurements for significantly enhancing the potential of Si(Li) spectrophotometry in X-ray astronomy is presented.
Serlemitsos, P. J.
core   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

open access: yesExperimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

Dual flatness filter design for single energy photon beam of medical linear accelerator – Rationale and efficacy

open access: yesJournal of Applied Clinical Medical Physics, Volume 26, Issue 12, December 2025.
Abstract Background Linear accelerators used for cancer treatments, in general, have one flattening filter (FF) for each x‐ray energy. In a newly developed 6 MV low energy linac model, beam optimization at higher dose rates is achieved by two FFs. Purpose To achieve optimization in higher dose rates for smaller fields with FF, one small flattening ...
Ramamoorthy Ravichandran   +4 more
wiley   +1 more source

Electrochemical ⍺‐C─H Functionalization of Nitramines for Accessing Bifunctional Energetic Heterocycles

open access: yesAngewandte Chemie, Volume 137, Issue 47, November 17, 2025.
An electrochemical α‐C─H functionalization of nitramines enables the synthesis of molecules containing bifunctional energetic heterocycles with promising properties. A telescoped, HNO3‐free sequence involving nitration and azolation steps offers a safer, modular, and scalable platform for the synthesis of energetic compounds.
Wan‐Chen Cindy Lee   +4 more
wiley   +2 more sources

X-Ray Polarization Study of the Neutron Star Low-mass X-Ray Binary GX 349+2

open access: yesThe Astrophysical Journal
We report the first X-ray polarimetric results of the neutron star (NS) low-mass X-ray binary Z-source GX 349+2 using the Imaging X-ray Polarimetry Explorer (IXPE). We discovered that the X-ray source was polarized at a polarization degree of PD = 1.1% ± 
Unnati Kashyap   +5 more
doaj   +1 more source

Phase-dependent X-ray observations of the beta Lyrae system: No eclipse in the soft band

open access: yes, 2007
We report on observations of the eclipsing and interacting binary beta Lyrae from the Suzaku X-ray telescope. This system involves an early B star embedded in an optically and geometrically thick disk that is siphoning atmospheric gases from a less ...
Hamann, W. -R.   +4 more
core   +1 more source

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