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A GPU-based phase tracking method for planetary radio science applications
Yan, Jianguo; Barriot, Jean-Pierre; Wang, Guangli +3 more
This paper introduces a phase tracking method with a computational algorithm for planetary radio science implemented on NVIDIA GPUs. In contrast to the phase-locked loop phase counting method used in traditional Doppler data processing, this method fits the tracking data with optimal parameters into the shape expressed by Taylor expansion. The dif…
Astrometric observations of visual binaries using 26‑inch refractor at Pulkovo Observatory during 2014–2019
Izmailov, Igor; Rublevsky, Aleksey; Apetyan, Arina
We present 18,365 astrometric observations of 290 visual binaries obtained with the 26‑inch refractor of Pulkovo Observatory during 2014–2019. The separation between components is from 1″.3 to 37″ with a median value of 4″.8. For a single observation, the mean separation error is 0″.013, and the mean position angle error is 0∘.44/ρ, where ρ is an …
Open Cluster IC 1369 and Its Vicinity: Multicolor Photometry and Gaia DR2 Astrometry
Straižys, V.; Raudeliūnas, S.; Maskoliūnas, M. +9 more
The open cluster IC 1369, located in Cygnus close to the galactic equator at the 89°6 longitude, and its vicinity are investigated by applying two-dimensional photometric classification of stars down to V = 19 mag measured in the Vilnius seven-color photometric system. Employing the Gaia DR2 coordinates, parallaxes, and proper motions, 143 cluster…
Characteristics of SEPs during solar cycles 21–24
Kumar, Raj; Pande, Bimal; Pande, Seema +1 more
The study of the solar energetic particle events (SEPs) and their association with solar flares and other activities are very crucial to understand the space weather. Keeping this in view, here we present the study of SEPs (intensity
Detection of gamma-ray transients with wild binary segmentation
Antier, S.; Barynova, K.; Fryzlewicz, P. +2 more
In the context of time domain astronomy, we present an offline detection search of gamma-ray transients using a wild binary segmentation analysis called F-WBSB targeting both short and long gamma-ray bursts (GRBs) and covering the soft and hard gamma-ray bands. We use NASA Fermi/GBM archival data as a training and testing data set. This paper desc…
Spectroscopic orbit determination of the long periodic binary system θ Cep
Mugrauer, Markus; Lux, Oliver; Bischoff, Richard +4 more
In 2015, a radial velocity monitoring campaign was started in order to redetermine and/or constrain the orbital solutions of spectroscopic binary systems. The observations were carried out at the University Observatory Jena with the Échelle spectrograph FLECHAS. The results from the main part of our target sample are already published. For the fin…
SOFIA/FORCAST Observations of R Aqr: Monitoring the Dust Emission
Gorti, Uma; Wagner, R. Mark; Sankrit, Ravi +2 more
We present mid-infrared spectra of the symbiotic Mira, R Aqr obtained with the Faint Object infraRed CAmera instrument on the Stratospheric Observatory for Infrared Astronomy in 2016 and 2017. These data, supplemented with Infrared Space Observatory observations from 20 yr earlier, allow us to study the variation of the silicate dust emission over…
Deep Learning for 3d Reconstruction of the Martian Surface Using Monocular Images: a First Glance
Chen, Z.; Wu, B.; Liu, W. C.
The paper presents our efforts on CNN-based 3D reconstruction of the Martian surface using monocular images. The Viking colorized global mosaic and Mar Express HRSC blended DEM are used as training data. An encoder-decoder network system is employed in the framework. The encoder section extracts features from the images, which includes convolution…
Theoretical studies of comets in the 55 Cancri system
Cuntz, Manfred; Dvorak, Rudolf; Loibnegger, Birgit
We present orbital integrations for various Jupiter family comets (JFCs) in the 55 Cancri system. This star is known to possess (at least) five planets with masses ranging from super-Earth to Jupiter-type. Furthermore, according to observational constraints, there is a space without planets between ∼0.8 and ∼5.7 au, offering the principal possibil…
The most evolved sources in the Hi-GAL survey
Elia, D.
Far-infrared and submillimetre surveys as the Herschel Galactic Plane Infrared Survey (Hi-GAL) represent an irreplaceable knowledge base about early phases of star formation, permitting statistical analysis based on thousands of Galaxy-wide distributed sources. Those with a regular spectral energy distribution in the Herschel wavelength range 70-5…