Results 31 to 40 of about 574,603 (197)

Absorption of high-energy gamma rays in Cygnus X-3 [PDF]

, 2011
The microquasar Cygnus X-3 was detected at high energies by the gamma-ray space telescopes AGILE and Fermi. The gamma-ray emission is transient, modulated with the orbital period and seems related to major radio flares, i.e. to the relativistic jet.
A. A. Zdziarski, A. Szostek, Abdo, Aharonian, Akharonian, Aleksić, Apparao, B. Cerutti, Band, Becker, Bednarek, Bednarek, Belmont, Bosch-Ramon, Carramiñana, Cawley, Cerutti, Crowther, Dickey, Dubus, Esin, Ford, G. Dubus, G. Henri, Gierliński, Gould, Gould, Gould, Guilbert, Hermsen, Hillas, Hjalmarsdotter, Hjalmarsdotter, J. Malzac, Ling, Martí, Mioduszewski, Morrison, Moskalenko, Paczyński, Paczyński, Papaloizou, Predehl, Pringle, Protheroe, R. Belmont, Romero, Shakura, Sitarek, Sitarek, Skinner, Szostek, Szostek, Tavani, van Kerkwijk, Vestrand, Vilhu, Wu, Yakovlev, Zhang   +59 more
core   +4 more sources

Observation of Histone H2AX Phosphorylation by Radiation-Induced Bystander Response Using Titanium Characteristic X-ray Microbeam

Biology, 2023
Radiation-induced bystander response (RIBR) is a response induced in non-irradiated cells that receive bystander signals from directly irradiated cells. X-ray microbeams are useful tools for elucidating the mechanisms underlying RIBR. However, previous X-
Masanori Tomita, Masaya Torigata, Tadayuki Ohchi, Atsushi Ito   +3 more
doaj   +1 more source

Photonic band gap and x-ray optics in warm dense matter

, 2010
Photonic band gaps for the soft x-rays, formed in the periodic structures of solids or dense plasmas, are theoretically investigated. Optical manipulation mechanisms for the soft x-rays, which are based on these band gaps, are computationally ...
Joannopoulos J. D., Lindl J. D., S. Ku, S. Son, Sung Joon Moon   +4 more
core   +1 more source

Enhancing the Outcome of Crystallographic Fragment Screening by Choosing the Optimal Protein Crystal Form

Small Science
Improving health and quality of life in our society is a key focus of drug development. Methods for drug discovery are being optimized in multiple ways to reduce costs and timelines.
Tatjana Barthel, Jan Wollenhaupt, Laila S. Benz, Patrick Reinke, Linlin Zhang, Melanie Oelker, Frank Lennartz, Helena Taberman, Uwe Mueller, Alke Meents, Rolf Hilgenfeld, Manfred S. Weiss   +11 more
doaj   +1 more source

Extended range X-ray telescope [PDF]

, 1981
An X-ray telescope system is described which is comprised of a tubular mount having a collecting region remote from the one axial end. A soft X-ray/XUV subsystem associated with the collecting region directs only relatively soft, near on-axis X-rays/XUV ...
Hoover, R. B.
core   +1 more source

New constraints on the continuum-emission mechanism of AGN: Intensive monitoring of NGC 7469 in the X-ray and ultraviolet [PDF]

, 1998
We have undertaken near-continuous monitoring of the Seyfert 1 galaxy NGC 7469 in the X-ray with RXTE over a ~30d baseline. The source shows strong variability with a root-mean-square (rms) amplitude of ~16 per cent, and peak-to-peak variations of a ...
Abramowicz M. A., B. M. Peterson, Brandt W. N., Courvoisier T. J.-L., Done C., Fabian A. C., George I. M., Ghisellini G., Gondek D., Green A. R., Guilbert P. W., Guilbert P. W., I. M. George, J. Clavel, K. Nandra, M. A. Malkan, Marshall N., Matt G., Molendi S., Nandra K., Papadakis I., R. A. Edelson, R. F. Mushotzky, Santos-Lleo M., Shakura N. I., Sunyaev R. A., T. J. Turner, Zdziarski A. A.   +27 more
core   +3 more sources

The very faint X-ray transient Swift J174610–290018 at the Galactic center

Astronomy & Astrophysics
Context. Very faint X-ray transients (VFXTs) are a class of X-ray binary systems that exhibit occasional outbursts with peak X-ray luminosities (LX ≲ 1036 erg s−1) much lower than those of typical X-ray transients.
Stel Giovanni, Ponti Gabriele, Degenaar Nathalie, Sidoli Lara, Mereghetti Sandro, Mori Kaya, Bao Tong, Illiano Giulia, Mondal Samaresh, Reynolds Mark, Jin Chichuan, Lian Tianying, Mandel Shifra, Scaringi Simone, Zhang Shuo, Sanger-Johnson Grace, Wijnands Rudy, Miller Jon M., Kennea Jamie, Zhu Zhenlin   +19 more
doaj   +1 more source

Looking Back: Unneeded X-rays [PDF]

, 2000
From the discovery of x-rays in 1896 to the present, Dr.
Mazur, Allan
core   +1 more source

Two-chicane compressed harmonic generation of soft x rays

Physical Review Special Topics. Accelerators and Beams, 2011
Seeding an electron bunch prior to compression simultaneously shifts the laser modulation to shorter wavelengths while decreasing the required modulation amplitude. The final x-ray wavelength is then tunable by controlling the compression factor with the
Daniel Ratner, Alex Chao, Zhirong Huang
doaj   +1 more source

Effects of Low-Dose X-Ray on Cell Growth, Membrane Permeability, DNA Damage and Gene Transfer Efficiency

Dose-Response, 2020
Background: We aimed to reveal if low dose X-rays would induce harmful or beneficial effect or dual response on biological cells and whether there are conditions the radiation can enhance gene transfer efficiency and promote cell growth but without ...
Zhuo Wang, Ming-Yue Lv, Yao-Xiong Huang
doaj   +1 more source