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Characteristics of GPS sources in the Planck survey
Volvach, A. E.; Kardashev, N. S.; Larionov, M. G. +1 more
Two series of 22.2 and 36.8-GHz observations of 43 GHz-Peaked Spectrum (GPS) radio sources from the Planck survey have been carried out using the 22-m radio telescope of the Crimean Astrophysical Observatory in 2014-2015, with the aim of studying the variability of these sources. The interval between the two series of observations was about nine m…
Long-term variability of active galactic nuclei from the "Planck" catalog
Volvach, A. E.; Kardashev, N. S.; Larionov, M. G. +1 more
A complete sample of 104 bright active galactic nuclei (AGNs) from the "Planck" catalog (early results) were observed at 36.8 GHz with the 22-m radio telescope of the Crimean Astrophysical Observatory (CrAO).Variability indices of the sources at this frequency were determined based on data from theWMAP space observatory, theMetsa¨ hovi RadioObserv…
The Footprint Database and Web Services of the Herschel Space Observatory
Valtchanov, Ivan; Budavári, Tamás; Verdugo, Eva +5 more
Data from the Herschel Space Observatory is freely available to the public but no uniformly processed catalogue of the observations has been published so far. To date, the Herschel Science Archive does not contain the exact sky coverage (footprint) of individual observations and supports search for measurements based on bounding circles only. Draw…
Comment on the paper "Mars Express radio occultation data: A novel analysis approach" by Grandin et al. (2014)
Pätzold, M.; Bird, M. K.; Häusler, B. +3 more
In their recent paper, Grandin et al. (2014) claim to have developed a novel approach, principally a ray tracing method, to analyze radio sounding data from occulted spacecraft signals by planetary atmospheres without the usual assumptions of the radio occultation inversion method of a stratified, layered, symmetric atmosphere. They apply their "n…
A comparison of anisotropic statistical properties of CMB maps based on the WMAP and planck space mission data
Verkhodanov, O. V.; Naiden, Ya. V.
We compare the anisotropic properties of the cosmic microwave background (CMB) maps constructed based on the data of NASA's WMAP (9th year of observations) and ESA's Planck (2015 release) space missions. In our analysis, we use two two-dimensional estimators of the scatter of the signal on a sphere, which amount to algorithms of mapping the ratio …
Foreshock ions observed behind the Martian bow shock
Coates, A. J.; Lundin, R.; Yamauchi, M. +4 more
The Mars Express Analyzer of Space Plasmas and Energetic Atoms experiment contains ion and electron instruments for conducting plasma measurements. On January 23, 2012, during in-bound travel of Mars Express in the southern hemisphere of Mars from its dawn side toward periapsis at dusk, the plasma instruments measured foreshock-like ion beams exte…
Coronal O VI emission observed with UVCS/SOHO during solar flares: Comparison with soft X-ray observations
Raymond, J. C.; Giordano, S.; Mancuso, S.
In this work, we derive the O VI 1032 Å luminosity profiles of 58 flares, during their impulsive phase, based on off-limb measurements by the Ultraviolet Coronagraph Spectrometer (UVCS) aboard the SOlar and Heliospheric Observatory (SOHO). The O VI luminosities from the transition region plasma (here defined as the region with temperatures 5.0 ≤ l…
2D photochemical model for forbidden oxygen line emission for comet 1P/Halley
Gunell, H.; Rubin, M.; De Keyser, J. +8 more
We present here a 2D model of photochemistry for computing the production and loss mechanisms of the O(1S) and O(1D) states, which are responsible for the emission lines at 577.7, 630, and 636.4 nm, in case of the comet 1P/Halley. The presence of O2 within cometary atmospheres, measured by the in situ Rosetta and G…
Dynamical structure of the multiple stellar system HD164492
González, J. F.; Veramendi, M. E.
HD 164492 is a Trapezium-like stellar system with one O-type and several early B-type components immersed in an active star forming region (M20). The relevance of this system has increased after the recent discovery that one of its visual components, HD 164492C, is a spectroscopic triple with a remarkable magnetic field. As a complement of those s…
Kinematic properties of the dual AGN system J0038+4128 based on long-slit spectroscopy
Huang, Yang; Liu, Xiao-Wei; Bai, Jin-Ming +2 more
The study of kiloparsec-scale dual active galactic nuclei (AGN) provides important clues for understanding the co-evolution between host galaxies and their central supermassive black holes undergoing a merging process. We present long-slit spectroscopy of J0038+4128, a kiloparsec-scale dual AGN candidate, discovered recently by Huang et al., using…