Search Publications
Missions
Journals
Publication Years
Exploring the region encompassing γ Cygni SNR and MAGIC J2019+408 with the GMRT at 325 and 610 MHz
Paredes, J. M.; Strzys, M.; Ishwara-Chandra, C. H. +2 more
Context. γ Cygni is a young supernova remnant located in the Cygnus region. MAGIC (Major Atmospheric Gamma Imaging Cherenkov) telescopes detected TeV emission (MAGIC J2019+408) to the north-west of this remnant, ~5' from its border.
Aims: We want to identify the radio sources within the region encompassing γ Cygni and MAGIC J2019+408 to shed …
Comparing the Sun Watcher Using Active Pixel System Detector and Image Processing Instrument to the Atmosphere Imaging Assembly Instrument Through Measurements of Polar Coronal Holes
West, Matthew J.; Pesnell, W. Dean; Kirk, Michael S. F. +2 more
The PRoject for OnBoard Autonomy 2/Sun Watcher using Active pixel system detector and image Processing (PROBA2/SWAP) instrument images the full-disk extreme ultraviolet (EUV) Sun using a complementary metal-oxide semiconductor active-pixel sensor (CMOS-APS) detector with a filter centered on a 174 Å passband at a cadence of one to two minutes. In …
Detection of Equatorial Plasma Velocity Modulations Associated With Planetary Period Oscillations in Saturn's Magnetosphere
Wilson, R. J.; Cowley, S. W. H.; Provan, G. +1 more
We analyze a database of 8920 measurements of thermal ion vector velocities obtained by the Cassini CAPS/IMS instrument in the near-equatorial (±10° latitude) region of Saturn's magnetosphere in the radial range of 5.5-21.5 Saturn radii (RS) for the presence of modulations due to planetary period oscillations (PPOs). The data span 2004-…
Automatic detection of accretion bursts in young stellar objects: A new algorithm for long-term sky surveys
Altavilla, G.; Nucita, A.; Lorenzetti, D. +4 more
Young stellar objects in their pre-main sequence phase are characterized by irregular changes in brightness, generally attributed to an increase of the mass accretion rate due to various kind of instabilities occurring in the circumstellar disk. In the era of large surveys aimed to monitor the sky, we present a pipeline to detect irregular bursts,…
Approximation of discontinuous inverse operators with neural networks
Massa, Paolo; Benvenuto, Federico; Garbarino, Sara
In this work we deal with parametric inverse problems, which consist in recovering a finite number of parameters describing the structure of an unknown object, from indirect measurements. State-of-the-art methods for approximating a regularizing inverse operator by using a dataset of input-output pairs of the forward model rely on deep learning te…
Recent volcanism and tectonism in the pre-Nectarian basins Grimaldi and Crüger-Sirsalis: Shreds of evidence from LRO, Chandrayaan-1, and Kaguya
Bhatt, Megha; Bhardwaj, Anil; Srivastava, Neeraj
Datasets from remote sensing missions such as Kaguya, LRO, GRAIL, and Chandrayaan-1 have substantially improved our understanding of the geology of the Moon by revealing new details about impact cratering, volcanism, and tectonism. Most of the late-stage (< 2.8 Ga) volcanic activities on the Moon occurred in the Procellarum KREEP Terrain (PKT).…
Observations of Modulation of Ion Flux in the Coma of Comet 67P/Churyumov-Gerasimenko
Altwegg, K.; Nilsson, H.; Goldstein, R. +4 more
On 6-8 June 2015, the Ion and Electron Sensor on board Rosetta observed keV-range water-group pickup ions arriving from the solar direction. Based on magnetic field intensification and variations, the appearance of the ions was likely to have been caused by a coronal mass ejection. During the 3-day period when Rosetta was 200 km from the comet, pe…
An Attempt to Identify Classical Cepheid Candidates in the LAMOST Spectroscopic Survey
Zhao, G.; Kovaleva, D.; Samus, N. N.
We describe our attempt to find new candidate classical Cepheids and other pulsating variable stars in the LAMOST spectroscopic survey using GAIA EDR3 data and existing photometric archives. Several stars deserve dedicated photometric observations.
Supermassive Black Hole Winds in X-rays
Bianchi, S.; Cappi, M.; Ponti, G. +22 more
SUBWAYS (Supermassive Black HoleWinds in X-rays) is an international program designed to provide a unique observational framework to test the validity of physical models for Active Galactic Nuclei (AGN) outflows. Its ultimate goal is to understand the AGN impact onto their host galaxies.Within this framework, we have been awarded a Large Program o…
X-ray galaxies selected from HyperLEDA database
Pulatova, N.; Tugay, A.; Zadorozhna, L. +4 more
We cross-matched the 4XMM-DR10 catalog with the HyperLEDA database and obtained a new sample of galaxies that contain X-ray sources. Excluding duplicate observations and false matches, we present a total of 7759 galaxies with X-ray sources. In the current work, we present general properties of the sample: namely the distribution in equatorial coor…