Zobrazeno 1 - 10
of 930
pro vyhledávání: '"Fink, H. A."'
Publikováno v:
In Carbohydrate Polymer Technologies and Applications 25 December 2021 2
Publikováno v:
In Carbohydrate Polymers 1 January 2021 251
Measurements of the microwave surface impedance $Z_s(T)=R_s(T)+iX_s(T)$ and of the complex conductivity $\sigma_s(T)$ of high-quality, high-$T_c$ single crystals of YBCO, BSCCO, TBCCO, and TBCO are analyzed. Experimental data of $Z_s(T)$ and $\sigma_
Externí odkaz:
http://arxiv.org/abs/cond-mat/9911211
We present results of an infrared-to-X-ray study of 76 bright soft X-ray selected Seyfert galaxies discovered in the ROSAT All-Sky Survey. These objects are characterized by steep X-ray spectra in the 0.2-2.0 keV bandpass with power law energy spectr
Externí odkaz:
http://arxiv.org/abs/astro-ph/9710298
We report evidence for persistent giant and rapid X-ray variability in the radio-quiet, ultrasoft, strong Fe II, narrow-line Seyfert 1 galaxy IRAS 13224-3809. Within a 30 day ROSAT High Resolution Imager (HRI) monitoring observation at least five gia
Externí odkaz:
http://arxiv.org/abs/astro-ph/9703114
Publikováno v:
Astron.Astrophys.315:77-85,1996
Blazars with redshifts z<0.1 are likely candidates for detection at energies in the range 300 GeV - 50 TeV with Cerenkov telescopes and scintillator arrays. We present gamma-ray flux predictions for a sample of 15 nearby flat-spectrum radio sources f
Externí odkaz:
http://arxiv.org/abs/astro-ph/9605107
We report some remarkable and unexpected results of optical/UV/X-ray follow-up observations of bright soft X-ray selected AGN from the ROSAT All-Sky-Survey. The majority of these AGN are rather anonymous Seyfert galaxies, mostly of the narrow-line Se
Externí odkaz:
http://arxiv.org/abs/astro-ph/9512045
We have identified the ROSAT source RX J0039.2-5117 with the previously almost unknown `narrow line' Seyfert 1 galaxy WPVS007 (z=0.028). The X-ray source displays quite unusual properties for an AGN. It was bright and ultrasoft in the ROSAT All-Sky S
Externí odkaz:
http://arxiv.org/abs/astro-ph/9506087
Publikováno v:
Astron.Astrophys. 305 (1996) 53
We report on AGN with extremely soft X-ray spectra observed with ROSAT. From their optical emission lines these objects are classified as narrow-line Seyfert 1 galaxies (NLS1), almost all with extremely large Fe II/H-beta ratios and relatively narrow
Externí odkaz:
http://arxiv.org/abs/astro-ph/9504093
Zwicky 159.034, one of the Seyfert galaxies identified with EUV sources detected during the ROSAT Wide Field Camera (WFC) all-sky survey, has unusual properties. The ROSAT Position Sensitive Proportional Counter (PSPC) 0.1--2.5 keV X-ray spectrum, ob
Externí odkaz:
http://arxiv.org/abs/astro-ph/9501108