Lines, Ray
On the origin of cyclotron lines in the spectra of X-ray pulsars
... Abstract. Cyclotron resonance scattering features are observed in the spectra of some X-ray pulsars and show significant changes in the line energy with the pulsar luminosity. In a case of bright sources, the line ...
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CIELO-RGS : a catalogue of soft X-ray ionized emission lines
... emission lines detected by the RGS instrument (den Herder et ...emission lines with a technique fully independent of the spectral modeling, and therefore in principle of the intrinsic physical and ...
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Investigating the nature of absorption lines in the Chandra X ray spectra of the neutron star binary 4U 1820−30
... detected lines are: Ne IX ...absorption lines are detected in both observations, however, some were not detected in the previous Chandra observations, likely due to the lower sensitivity of those shorter ...
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The X-ray spectrum of the Seyfert I galaxy Markarian 766: Dusty warm absorber or relativistic emission lines?
... emission lines of O VIII , N VII and C VI is a better fit to ...absorption lines in the spectrum is inconsistent with the magnitude of the iron edge required to produce the continuum break at 17-18˚ A in ...
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Calibration of thickness dependent k factors for germanium X ray lines to improve energy dispersive X ray spectroscopy of SiGe layers in analytical transmission electron microscopy
... Figure 3 shows plots of the thickness dependent k-factors from equation (5) as a function of the Ge K/L ratio, i.e. of k* GeK,L , along with exponential and also parabolic fits, for both Ge K-line (a) and L- line (b) ...
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Historical Note: B B Ray and Controversy over the Spectral Raman lines
... In Annalen der Physik Sommerfeld hoped to have explained, theoretically and experimentally, the remarkable results of B B Ray (Sommerfeld, 1937, pp. 715–720). Not only Sommerfeld, but also his student Fritz ...
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Atomic data for the astrophysics : Fe XII soft X-ray lines.
... The soft X-ray (50–170 Å) spectrum of the quiet and active Sun is rich in n = 4 → n = 3 transitions from highly ionised iron ions, from Fe vii to Fe xvi (see, e.g. Fawcett et al. 1968; Manson 1972; Behring et al. ...
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Atomic data for astrophysics : Fe X soft x-ray lines
... The Solar Dynamic Observatory (SDO) Extreme ultravi- olet Variability Experiment (EVE) (Woods et al. 2010) has also been providing soft X-ray spectra. The SDO Atmospheric Imaging Assembly (AIA, see Lemen et al. ...
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New pathways for improved quantification of energy-dispersive X-ray spectra of semiconductors with multiple X-ray lines from thin foils investigated in transmission electron microscopy
... a specimen foil can be determined from comparative measurements at different tilts, then absorption corrections for X-rays can be improved and a higher reliability of any compositional estimate may be obtained. In the ...
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Atomic data for the x-ray lines of Fe viii and Fe ix
... The 50–170 Å spectral region is dominated by a forest of transi- tions, many of which are from n = 4, 5, 6 and 7 states of highly ionised iron ions, and for which little atomic data are available (see Fawcett et al. ...
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A coordinated optical and X ray spectroscopic campaign on HD 179949 : searching for planet induced chromospheric and coronal activity
... major axis a < 0 . 1 AU). These planets are dubbed Hot Jupiters (HJs). Star-Planet tidal and/or magnetospheric Interaction (SPI) in these systems were claimed to be the possible cause of stel- lar activity ...
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Echo tomography of Sco X 1 using Bowen fluorescence lines
... Exploiting emission-line reprocessing rather than broad-band photometry has two potential benefits: a) it amplifies the response of the donor’s contribution by suppressing most of the background continuum light (which is ...
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Quantitative Evaluation of Calcium Phosphate on Surface of Titanium by X ray Fluorescence Analysis
... Ti-K lines emitted from the substrates was sufficiently strong with a little fluctuation; accordingly, the method based on the X-ray intensity of the Ti-K was expected to give a more appropriate evaluation of ...
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M31N 2008 12a the remarkable recurrent nova in M31:Pan Chromatic observations of the 2015 eruption
... Figure 8 . Panel a: The short-term X-ray light curve of M31N 2008-12a based on the individual XRT snapshots. Data points with error bars show the XRT count rates and corresponding errors for the 2015 (black), 2014 ...
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The use of self-induced X-ray fluorescence in gamma-ray spectroscopy of uranium ore samples
... disequilibrium of the decay chain. Moreover, the sample mineralogy has little impact on attenuation of this radiation with a relatively high energy. However, its emission intensity is very small (0.847%) and its ...
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Electron Proton Pairing at High Temperatures, Solar Flares, and the FIP Effect
... distinct lines from the Solar flare data have been used up in the above as evidence for our generalized Balmer ...of lines over a wide range in the X-ray re- ...these lines follow from the ...
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The nature of the X ray transient MAXI J0556−332
... emission lines in the average FORS spectrum shown in ...emission lines for LMXBs (i.e. Hβ, He II λ4686, Bowen and all He I lines) are all ...emission lines which are not commonly observed in ...
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Probing neutrino physics at LHC through R-parity breaking supersymmetry
... γ-ray lines produced by gravitino decays of mass above a few GeV would be confronted with the Fermi-LAT satellite observations, leading to an upper bound on the gravitino DM ...
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Atomic data for astrophysics : Ni XII
... We present new large-scale R-matrix (up to n = 4) scattering calculations for the electron collisional excitation of Cl-like Ni xii . We used the intermediate-coupling frame transformation method. We compare predicted ...
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Automatic unhulled rice grain crack detection by X-ray imaging
... more lines in the xy plane, as shown in figure ...the lines that represent a single crack must be ...the lines are ...these lines are grouped into a single ...addition, lines with q ...
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