Zobrazeno 1 - 10
of 7 547
pro vyhledávání: '"Smirnov, A M"'
Autor:
Perkins, Simon J., Kenyon, Jonathan S., Andati, Lexy A. L., Bester, Hertzog L., Smirnov, Oleg M., Hugo, Benjamin V.
New radio interferometers such as MeerKAT, SKA, ngVLA, and DSA-2000 drive advancements in software for two key reasons. First, handling the vast data from these instruments requires subdivision and multi-node processing. Second, their improved sensit
Externí odkaz:
http://arxiv.org/abs/2412.12052
Autor:
Smirnov, Oleg M., Makhathini, Sphesihle, Kenyon, Jonathan S., Bester, Hertzog L., Perkins, Simon J., Ramaila, Athanaseus J. T., Hugo, Benjamin V.
Stimela2 is a new-generation framework for developing data reduction workflows. It is designed for radio astronomy data but can be adapted for other data processing applications. Stimela2 aims at the middle ground between ease of development, human r
Externí odkaz:
http://arxiv.org/abs/2412.10080
Autor:
Kenyon, Jonathan S., Perkins, Simon J., Bester, Hertzog L., Smirnov, Oleg M., Russeeawon, Cyndie, Hugo, Benjamin V.
Calibration of radio interferometer data ought to be a solved problem; it has been an integral part of data reduction for some time. However, as larger, more sensitive radio interferometers are conceived and built, the calibration problem grows in bo
Externí odkaz:
http://arxiv.org/abs/2412.10072
Autor:
Bester, Hertzog L., Kenyon, Jonathan S., Repetti, Audrey, Perkins, Simon J., Smirnov, Oleg M., Blecher, Tariq, Mhiri, Yassine, Roth, Jakob, Heywood, Ian, Wiaux, Yves, Hugo, Benjamin V.
The popularity of the CLEAN algorithm in radio interferometric imaging stems from its maturity, speed, and robustness. While many alternatives have been proposed in the literature, none have achieved mainstream adoption by astronomers working with da
Externí odkaz:
http://arxiv.org/abs/2412.10073
CIZA J2242.8+5301, or the Sausage cluster, is well studied over a range of frequencies. Since its first discovery, a lot of interesting features and unique characteristics have been uncovered. In this work, we report some more new morphological featu
Externí odkaz:
http://arxiv.org/abs/2409.07504
Autor:
Roth, Jakob, Frank, Philipp, Bester, Hertzog L., Smirnov, Oleg M., Westermann, Rüdiger, Enßlin, Torsten A.
Publikováno v:
A&A 690, A387 (2024)
Context: Interferometric imaging is algorithmically and computationally challenging as there is no unique inversion from the measurement data back to the sky maps, and the datasets can be very large. Many imaging methods already exist, but most of th
Externí odkaz:
http://arxiv.org/abs/2406.09144
Autor:
Andati, Lexy A. L., Baidoo, Lerato M., Ramaila, Athanaseus J. T., Smirnov, Oleg M., Makhathini, Sphesihle, Perley, Richard A.
We present the results of a polarimetric study from our new high-sensitivity L-band (0.8--1.7 GHz) observation of Pictor A with the MeerKAT radio telescope. We confirm the presence of the radio jet extending from the nucleus to the western hotspot of
Externí odkaz:
http://arxiv.org/abs/2402.17647
Autor:
Deane, Roger P., Radcliffe, Jack F., Njeri, Ann, Akoto-Danso, Alexander, Bernardi, Gianni, Smirnov, Oleg M., Beswick, Rob, Garrett, Michael A., Jarvis, Matt J., Whittam, Imogen H., Bourke, Stephen, Paragi, Zsolt
The past decade has seen significant advances in wide-field cm-wave very long baseline interferometry (VLBI), which is timely given the wide-area, synoptic survey-driven strategy of major facilities across the electromagnetic spectrum. While wide-fie
Externí odkaz:
http://arxiv.org/abs/2401.12298
Autor:
Smirnov, O. M., Stappers, B. W., Tasse, C., Bester, H. L., Bignall, H., Walker, M. A., Caleb, M., Rajwade, K. M., Buchner, S., Woudt, P., Ivchenko, M., Roth, L., Noordam, J. E., Camilo, F.
We report on a radiopolarimetric observation of the Saturn-Jupiter Great Conjunction of 2020 using the MeerKAT L-band system, initially carried out for science verification purposes, which yielded a serendipitous discovery of a pulsar. The radiation
Externí odkaz:
http://arxiv.org/abs/2312.12165
Astronomers performing polarimetric analysis on astronomical images often have to manually identify locations on their objects of interest, such as galaxies, which exhibit the influence of magnetic forces due to interaction with their environments or
Externí odkaz:
http://arxiv.org/abs/2312.07645