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Vertical Current Density Structure of Saturn's Equatorial Current Sheet
Ray, L. C.; Case, N. A.; Arridge, C. S. +1 more
Routine spacecraft encounters with the Saturn current sheet due to the passage of aperiodic waves provide the opportunity to analyze the current sheet structure. The current density is expected to peak where the field strength reaches a minimum if approximated as a Harris current sheet. However, in Earth's magnetotail this is not always the case a…
Decomposing the host galaxy from high-z QSOs using principal component analysis
Wang, Yi-Ping; He, Wei
High resolution deep imaging from space and adaptive optics techniques with large ground-based facilities have enabled studies examining faint host galaxies of high redshift quasi-stellar objects (QSOs). However, the related image processing techniques, especially for a precise point-spread function (PSF) reconstruction and characterization of the…
Publisher Correction: No detection of methane on Mars from early ExoMars Trace Gas Orbiter observations
Montmessin, Franck; Belyaev, Denis A.; Fedorova, Anna A. +42 more
The surname of author Cathy Quantin-Nataf was misspelled `Quantin-Nata', authors Ehouarn Millour and Roland Young were missing from the ACS and NOMAD Science Teams list, and minor changes have been made to the author and affiliation lists; see accompanying Amendment. These errors have been corrected online.
Lifetime of channel electron multiplier detectors dedicated to plasma instruments for Solar Orbiter and JUICE space missions
André, N.; Fedorov, A.; Grigoriev, A. +2 more
Both Solar Orbiter and Jupiter Icy moon Explorer (JUICE) are long-life ESA missions, which should work in extremely difficult space environment. A very high thermal load up to 13 Solar constants will affect Solar Orbiter, and JUICE will experience a high penetration radiation influence in the Jupiter magnetosphere. The plasma packages of these mis…
Quiet-Sun EUV He II (30.4 nm) Spatial Power Ratios and Network Dissipation Trend for 2010 - 2018
Didkovsky, Leonid
We explore a significant change of the trend of the transition region network scale variation that occurred around of 2016 when a series of spotless days in 2018, with similar radiative characteristics, were added to previously analyzed days in 2017. We find that a mean per six-year spatial power ratio for 2016 vs. 2010 shows a 29% yearly increase…
X-Ray Warm Absorber Variability of the Seyfert Galaxy Arakelian 564
Nouh, M. I.; Korany, B.
We studied the variability of warm absorber clouds of ionized gas within AGN for the Seyfert 1 galaxy Arakelian 564. The X-ray spectra for four XMM-Newton observations of this object are analyzed using the EPIC and the RGS instruments. These four observations covered 11 years. The ionization parameter ξ of the absorbing matter changed between obse…
A steep bandpass interference filter with FWHM 11nm centered at 1254nm for studying Lyman Alpha signatures of highly redshifted galaxies
Herrero, A.; Marín-Franch, A.; Guzmán, R. +9 more
The presented new 1% narrowband filter centered at 1254nm with a FWHM of 11nm required and achieved excellent maximum transmission and deep out of band blocking. Magnetron sputtering was used for the filter coating process. The filter was used in the fully cryogenic near-infrared camera CIRCE of the Gran Telescopio Canarias (GTC) Telescope. The go…
Variability analysis of δ Scuti candidate stars
Tautvaišienė, G.; Drazdauskas, A.; Mikolaitis, Š. +5 more
The Hipparcos catalogue contains stars suspected to be δ Scuti variables for which extensive groundbased observations and characterisation of variability are desired. We obtained 24 215 CCD images with the 35/51 cm Maksutov-type robotic telescope at the Molėtai Astronomical Observatory (MAO, Lithuania) of thirteen δ Scuti candidates selected from …
Corrigendum to "Decadal Timescale Variability of the Enceladus Plumes Inferred from Cassini Images" [ICARUS, 282 (15 Jan 2017) pages 260-275]
Ingersoll, Andrew P.; Ewald, Shawn P.
Tables S2 and S3 are now included in the Supplementary Online Material for this article.
Stray light calibration for the Solar Orbiter/Metis solar coronagraph
Romoli, M.; Andretta, V.; Uslenghi, M. +20 more
The Solar Orbiter/Metis visible and UV solar coronagraph redefines the concept of external occultation in solar coronagraphy. Classical externally occulted coronagraphs are characterized by an occulter in front of the telescope entrance aperture. Solar Orbiter will approach the Sun down to 0.28 AU: in order to reduce the thermal load, the Metis de…