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de Laat, Willem (author)The need to receive and process higher data rates in computer clusters is an ever-increasing trend. This also applies to radio-astronomic systems, which have become more distributed over the past decades, increasing data traffic between antennas and processing facilities. At the antenna, Field Programmable Gate Arrays (FPGAs) digitise the radio...master thesis 2022
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Gort, Timo (author)<i>Context.</i> In the near-future, exoplanets can be observed directly through telescopes. Although the resolution of the planet's image will only be one pixel at first, the intensity of this pixel will change over time because of the orbit around its host star and its diurnal rotation. This intensity as a function of time is called the light...bachelor thesis 2022
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Marting, Louis (author)Terahertz astronomy has been exceptionally unexplored until the last decades due to a technological gap, but exactly at these wavelengths the most distant galaxies appear very bright. Efficient instruments that are capable of spectrometry are essential in understanding the physics of these distant objects. Within the framework of this thesis, an...master thesis 2022
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Ligthart, Liam (author)More insight has been gathered on the performance of the SPLITTER (Stationary spectrum Plus Low-rank Iterative TransmiTtance EstimatoR) algorithm as developed by Brackenhoff for denoising data gathered from observations of high-redshift galaxies. By using matrix decomposition to split the gathered data into a low-rank atmosphere matrix and a...bachelor thesis 2022
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Pascual Laguna, A. (author)The mysteries of the early Universe are largely enshrouded in dust, product of the violent process of star formation. Due to the vast distances of our Universe, infrared light emitted by the heated dust back in those early stages can still be observed today, which has been observed to contribute to about half of the total cosmic background...doctoral thesis 2022
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Huijten, Esmee (author), Roelvink, Yannick (author), Brackenhoff, Stefanie A. (author), Zaalberg, S.L. (author), Doing, Anne Kee (author), Baselmans, J.J.A. (author), Karatsu, K. (author), Pascual Laguna, A. (author), van Hoven, M.B. (author), Endo, A. (author)The next technological breakthrough in millimeter–submillimeter astronomy is three-dimensional imaging spectrometry with wide instantaneous spectral bandwidths and wide fields of view. The total optimization of the focal-plane instrument, the telescope, the observing strategy, and the signal-processing software must enable efficient removal...journal article 2022
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Walker, C (author), Kusela, C. (author), Young, A (author), Verts, W. (author), Gao, J.R. (author), Hu, Qing (author), Silva, J. R.G. (author), Mirzaei, B. (author), Laauwen, Wouter (author)Gal/Xgal U/LDB Spectroscopic/ Stratospheric THz Observatory (GUSTO) is a NASA Explorers Mission of Opportunity that will make large scale maps of the Milky Way and Large Magellanic Cloud in three important interstellar lines: [CII], [OI], and [NII] at 158, 63, and 205 μm, respectively. During its ~75 day stratospheric (~36 km) flight, GUSTO’s 0...conference paper 2022
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Endo, A. (author), Pascual Laguna, Alejandro (author), Hähnle, S.A. (author), Karatsu, K. (author), Thoen, David (author), Murugesan, Vignesh (author), Baselmans, J.J.A. (author)Superconducting resonators and transmission lines are fundamental building blocks of integrated circuits for millimeter-submillimeter astronomy. Accurate simulation of radiation loss from the circuit is crucial for the design of these circuits because radiation loss increases with frequency, and can thereby deteriorate the system performance....journal article 2022
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Baselmans, J.J.A. (author), Karatsu, K. (author), Llombart, Nuria (author), Rybak, M. (author), Bueno Lopez, J. (author), Buijtendorp, B.T. (author), Dabironezare, Shahab Oddin (author), Hähnle, S.A. (author), Pascual Laguna, A. (author), Thoen, David (author), Yates, S.J.C. (author), Endo, A. (author)Integrated superconducting spectrometer (ISS) technology will enable ultra-wideband, integral-field spectroscopy for (sub)millimeter-wave astronomy, in particular, for uncovering the dust-obscured cosmic star formation and galaxy evolution over cosmic time. Here, we present the development of DESHIMA 2.0, an ISS for ultra-wideband...journal article 2022
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Abel, Felix (author), Sundaramoorthy, P.P. (author), Rajan, R.T. (author)Recently, an increase in distributed space systems and a rise in number of nodes in such systems is observed in numerous space applications, for example space-based interferometry. Such applications pose stringent demands on time synchronization which can be challenging to achieve for satellite networks that lack an absolute time reference...conference paper 2022
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Gurvits, L. (author), Falcke, Heino (author), Frey, Sándor (author), Fromm, Christian M. (author), García-Miró, Cristina (author), Janssen, Michael (author), Masania, K. (author), Rajan, R.T. (author), Visser, P.N.A.M. (author)Ultra-high angular resolution in astronomy has always been an important vehicle for making fundamental discoveries. Recent results in direct imaging of the vicinity of the supermassive black hole in the nucleus of the radio galaxy M87 by the millimeter VLBI system Event Horizon Telescope and various pioneering results of the Space VLBI...journal article 2022
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Vaccaro, Davide (author), Akamatsu, Hiroki (author), Bruijn, Marcel (author), Gottardi, Luciano (author), Den Hartog, Roland (author), Van Der Kuur, Jan (author), Ridder, Marcel (author), De Wit, Martin (author), Gao, J.R. (author)We have measured and characterized the thermal crosstalk in two different arrays of transition-edge sensor (TES) X-ray microcalorimeters with frequency-domain multiplexing (FDM) readout. The TES arrays are fabricated at SRON and are a 8 × 8 and a 32 × 32 'kilo-pixel' uniform array. The amount of crosstalk is evaluated as the ratio between the...journal article 2022
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Rybak, M. (author), Bakx, T. (author), Baselmans, J.J.A. (author), Karatsu, K. (author), Kohno, K. (author), Takekoshi, T. (author), Taniguchi, A. (author), van der werf, P. (author), Endo, A. (author)We present a feasibility study for the high-redshift galaxy part of the Science Verification Campaign with the 220–440 GHz deshima 2.0 integrated superconducting spectrometer on the ASTE telescope. The first version of the deshima 2.0 chip has been recently manufactured and tested in the lab. Based on these realistic performance measurements,...journal article 2022
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Meinke, Klaas (author)By the late 2020s or early 2030s, the next generation of telescopes will be able to directly observe the reflected starlight of Earth-like exoplanets. Because of the huge distance to other stars, such exoplanets will appear as single unresolved pixels. A single pixel can, however, provide information about what the planet looks like because its...master thesis 2021
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Brackenhoff, Stefanie (author)We propose the Stationary spectrum Plus Low-rank Iterative TransmiTtance EstimatoR (SPLITTER) for removing wideband atmospheric noise from observations of high-redshift galaxies. This algorithm has specifically been developed for the DEep Spectroscopic HIgh-redshift MApper (DESHIMA) 2.0, a spectrometer that is designed to observe the waveband...master thesis 2021
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Gurvits, L. (author), Paragi, Zsolt (author), Casasola, Viviana (author), Conway, John (author), Davelaar, Jordy (author), Falcke, Heino (author), Fender, Rob (author), Frey, Sándor (author), Fromm, Christian M. (author)This paper presents the ESA Voyage 2050 White Paper for a concept of TeraHertz Exploration and Zooming-in for Astrophysics (THEZA). It addresses the science case and some implementation issues of a space-borne radio interferometric system for ultra-sharp imaging of celestial radio sources at the level of angular resolution down to (sub-)...journal article 2021
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Nevinskaia, A.S. (author), Bentum, Mark J. (author), Engelen, S. (author), Monna, Bert (author), Naeije, M.C. (author)Observing the universe in the Ultra-Long Wavelength (ULW) regime has been called the ‘last frontier in astronomy’—real imaging capabilities here are yet to be achieved. Obtaining an image of the sky in this frequency band can be done by employing a swarm of satellites that together act as an interferometer and collect the required imaging...journal article 2021
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Pascual Laguna, A. (author), Karatsu, K. (author), Thoen, David (author), Murugesan, Vignesh (author), Buijtendorp, B.T. (author), Endo, A. (author), Baselmans, J.J.A. (author)A superconducting microstrip half-wavelength resonator is proposed as a suitable band-pass filter for broadband moderate spectral resolution spectroscopy for terahertz (THz) astronomy. The proposed filter geometry has a free spectral range of an octave of bandwidth without introducing spurious resonances, reaches a high coupling efficiency in...journal article 2021
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Gurvits, L. (author), Beswick, Robert (author), Hoare, Melvin (author), Njeri, Ann (author), Blanchard, Jay (author), Sharpe, Carla (author), Tiplady, Adrian (author), De Witt, Aletha (author)Very Long Baseline Interferometry (VLBI) offers unrivalled resolution in studies of celestial radio sources. The subjects of interest of the current IAU Symposium, the Active Galactic Nuclei (AGN) of all types, constitute the major observing sample of modern VLBI networks. At present, the largest in the world in terms of the number of...journal article 2021
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Gurvits, L. (author), Paragi, Zsolt (author), Amils, Ricardo I. (author), van Bemmel, Ilse (author), Casasola, Viviana (author), Conway, John (author), Masania, K. (author), Rajan, R.T. (author), Visser, P.N.A.M. (author)Ultra-high angular resolution in astronomy has always been an important vehicle for making fundamental discoveries. Recent results in direct imaging of the vicinity of the super-massive black hole in the nucleus of the radio galaxy M87 by the millimeter VLBI system Event Horizon Telescope (EHT) and various pioneering results of the Space VLBI...conference paper 2021