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A novel principle for an ion mirror design in time-of-flight mass spectrometry
Wurz, P.; Altwegg, K.; Balsiger, H. +7 more
A novel design for a gridless two-stage ion mirror, or reflectron, for time-of-flight mass spectrometry (TOFMS) will be presented. The development of this novel design was driven by the stringent engineering requirements for the ion mirror's utilization by the reflectron time-of-flight (RTOF) sensor in the Rosetta orbiter spectrometer for ion and …
INTEGRAL and RXTE Observations of Centaurus A
Rothschild, Richard E.; Staubert, Rüdiger; Wilms, Jörn +6 more
INTEGRAL and RXTE performed three simultaneous observations of the nearby radio galaxy Centaurus A in 2003 March, 2004 January, and 2004 February with the goals of investigating the geometry and emission processes via the spectral/temporal variability of the X-ray/low-energy gamma-ray flux, and intercalibration of the INTEGRAL instruments with res…
The ISO 170 µm luminosity function of galaxies
Dole, H.; Lagache, G.; Puget, J. -L. +3 more
We constructed a local luminosity function (LF) of galaxies using a flux-limited sample (S170 ≥ 0.195~Jy) of 55 galaxies at z < 0.3 taken from the <sl>ISO</sl> FIRBACK survey at 170 µm. The overall shape of the 170-µm LF is found to be different from that of the total 60-µm LF (Takeuchi et al. 2003): the…
Stratification in the broad line region of AGN: The two-component model
Bon, E.; Popović, L. Č.; Ilić, D. +1 more
Here we present our investigation of the kinematic structure of the broad emission line region (BLR) in a sample of 14 single-peaked Active Galactic Nuclei (AGN), which have been previously observed in the X-ray (Fe Kα line) and where, according to the X-ray emission, a disk geometry is expected. To explain the BLR complex structure we apply a two…
Plasma intrusion above Mars crustal fields—Mars Express ASPERA-3 observations
Coates, A. J.; Kallio, E.; Fedorov, A. +42 more
Using data of the ASPERA-3 instrument on board the European Mars Express spacecraft we investigate the effect of the martian crustal fields on electrons intruding from the magnetosheath. For the crustal field strength we use published data obtained by the Mars Global Surveyor MAG/ER instrument for a fixed altitude of 400 km. We use statistics on 1…
Capella Corona Revisited: A Combined View from XMM-Newton RGS and Chandra HETGS and LETGS
Sako, M.; Kahn, S. M.; Gupta, R. +2 more
We present a combined analysis of the X-ray emission of the Capella corona obtained with XMM-Newton RGS and Chandra HETGS and LETGS. An improved atomic line database and a new differential emission measure (DEM) deconvolution method are developed for this purpose. Our new atomic database is based on the Astrophysical Plasma Emission Database and i…
Long-lived Solar Neutron Emission in Comparison with Electron-produced Radiation in the 2005 September 7 Solar Flare
Tanaka, Y. T.; Yoshikawa, I.; Mukai, T. +23 more
Strong signals of neutral emissions were detected in association with a solar flare that occurred on 2005 September 7. They were produced by both relativistic ions and electrons. In particular, relativistic neutrons were observed with the solar neutron telescopes (SNTs) located at Mount Chacaltaya in Bolivia and Mount Sierra Negra in Mexico and wi…
Winds on Titan from ground-based tracking of the Huygens probe
Plettemeier, D.; Bird, M. K.; Asmar, S. W. +14 more
Large radio telescopes on Earth tracked the radio signal transmitted by the Huygens probe during its mission at Titan. Frequency measurements were conducted as a part of the Huygens Doppler Wind Experiment (DWE) in order to derive the velocity of the probe in the direction to Earth. The DWE instrumentation on board Huygens consisted of an ultrasta…
Cassini thermal observations of Saturn's main rings: Implications for particle rotation and vertical mixing
Altobelli, Nicolas; Michael Flasar, F.; Cuzzi, Jeffrey N. +9 more
In late 2004 and 2005 the Cassini composite infrared spectrometer (CIRS) obtained spatially resolved thermal infrared radial scans of Saturn's main rings (A, B and C, and Cassini Division) that show ring temperatures decreasing with increasing solar phase angle, α, on both the lit and unlit faces of the ring plane. These temperature differences su…
A Quantitative Study on Magnetic Configuration for Active Regions
Guo, Juan; Zhang, Hongqi; Chumak, Oleg V. +1 more
As compared with the Mount Wilson Magnetic Classification (MWMC), effective distance (dE) is a useful parameter because it gives a quantitative measure of magnetic configuration in active regions. We have analyzed magnetograms of 24 active regions of different types with MWMC. We have studied the evolution of magnetic fields of five act…