Experimental Astronomy

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Energy sensitivity of the GRAPES-3 EAS array for primary cosmic ray protons
Experimental Astronomy - Tập 50 - Trang 185-198 - 2020
B. Hariharan, S. Ahmad, M. Chakraborty, A. Chandra, S. R. Dugad, S. K. Gupta, Y. Hayashi, H. Kojima, S. S. R. Inbanathan, P. Jagadeesan, A. Jain, P. Jain, V. B. Jhansi, S. Kawakami, P. K. Mohanty, S. D. Morris, P. K. Nayak, A. Oshima, D. Pattanaik, P. S. Rakshe, K. Ramesh, B. S. Rao, L. V. Reddy, S. Shibata, F. Varsi, M. Zuberi
Low energy ground-based cosmic ray air shower experiments generally have energy threshold in the range of a few tens to a few hundreds of TeV. The shower observables are measured indirectly with an array of detectors. The atmospheric absorption of low energy secondaries limits their detection frequencies at the Earth’s surface. However, due to selection effects, a tiny fraction of low energy showe...... hiện toàn bộ
Near-infrared sky background fluctuations at mid- and low latitudes
Experimental Astronomy - Tập 22 - Trang 87-107 - 2008
G. Moreels, J. Clairemidi, M. Faivre, D. Pautet, F. Rubio da Costa, P. Rousselot, J.W. Meriwether, G.A. Lehmacher, E. Vidal, J.L. Chau, G. Monnet
The emission of the upper atmosphere introduces an additional variable component into observations of astronomical objects in the NIR 700–3,000 nm range. The subtraction of this component is not easy because it varies during the night by as much as 100% and it is not homogeneous over the sky. A program aimed at measuring and understanding the main characteristics of the atmospheric NIR emission wa...... hiện toàn bộ
An investigation of the Eigenvalue Calibration Method (ECM) using GASP for non-imaging and imaging detectors
Experimental Astronomy - - 2015
Gillian Kyne, David Lara, Gregg Hallinan, Michael Redfern, Andrew Shearer
Polarised light from astronomical targets can yield a wealth of information about their source radiation mechanisms, and about the geometry of the scattered light regions. Optical observations, of both the linear and circular polarisation components, have been impeded due to non-optimised instrumentation. The need for suitable observing conditions and the availability of luminous targets are also ...... hiện toàn bộ
Principal component analysis to correct data systematics. Case study: K2 light curves
Experimental Astronomy - Tập 49 - Trang 97-114 - 2020
A. Petralia, G. Micela
Instrumental data are affected by systematic effects that dominate the errors and can be relevant when searching for small signals. This is the case of the K2 mission, a follow up of the Kepler mission, that, after a failure on two reaction wheels, has lost its stability properties rising strongly the systematics in the light curves and reducing its photometric precision. In this work, we have dev...... hiện toàn bộ
Cryogenic Tests of Volume-Phase Holographic Gratings: I. Results at 200 K
Experimental Astronomy - Tập 15 - Trang 1-12 - 2014
N. Tamura, G. J. Murray, P. Luke, C. Blackburn, D. J. Robertson, N. A. Dipper, R. M. Sharples, J. R. Allington-Smith
We present results from cryogenic tests of a Volume-Phase Holographic(VPH) grating at 200 K measured at near-infrared wavelengths. The aims of these tests were to see whether the diffraction efficiency and angular dispersion of a VPH grating are significantly different at a low temperature from those at a room temperature, and to see how many cooling and heating cycles the grating can withstand. W...... hiện toàn bộ
Multi-messenger astrophysics with THESEUS in the 2030s
Experimental Astronomy - Tập 52 - Trang 245-275 - 2021
Riccardo Ciolfi, Giulia Stratta, Marica Branchesi, Bruce Gendre, Stefan Grimm, Jan Harms, Gavin Paul Lamb, Antonio Martin-Carrillo, Ayden McCann, Gor Oganesyan, Eliana Palazzi, Samuele Ronchini, Andrea Rossi, Om Sharan Salafia, Lana Salmon, Stefano Ascenzi, Antonio Capone, Silvia Celli, Simone Dall’Osso, Irene Di Palma, Michela Fasano, Paolo Fermani, Dafne Guetta, Lorraine Hanlon, Eric Howell, Stephane Paltani, Luciano Rezzolla, Serena Vinciguerra, Angela Zegarelli, Lorenzo Amati, Andrew Blain, Enrico Bozzo, Sylvain Chaty, Paolo D’Avanzo, fnmMassimiliano De Pasquale, Hüsne Dereli-Bégué, Giancarlo Ghirlanda, Andreja Gomboc, Diego Götz, Istvan Horvath, Rene Hudec, Luca Izzo, Emeric Le Floch, Liang Li, Francesco Longo, S. Komossa, Albert K. H. Kong, Sandro Mereghetti, Roberto Mignani, Antonios Nathanail, Paul T. O’Brien, Julian P. Osborne, Asaf Pe’er, Silvia Piranomonte, Piero Rosati, Sandra Savaglio, Fabian Schüssler, Olga Sergijenko, Lijing Shao, Nial Tanvir, Sara Turriziani, Yuji Urata, Maurice van Putten, Susanna Vergani, Silvia Zane, Bing Zhang
Multi-messenger astrophysics is becoming a major avenue to explore the Universe, with the potential to span a vast range of redshifts. The growing synergies between different probes is opening new frontiers, which promise profound insights into several aspects of fundamental physics and cosmology. In this context, THESEUS will play a central role during the 2030s in detecting and localizing the el...... hiện toàn bộ
TandEM: Titan and Enceladus mission
Experimental Astronomy - Tập 23 - Trang 893-946 - 2008
A. Coustenis, S. K. Atreya, T. Balint, R. H. Brown, M. K. Dougherty, F. Ferri, M. Fulchignoni, D. Gautier, R. A. Gowen, C. A. Griffith, L. I. Gurvits, R. Jaumann, Y. Langevin, M. R. Leese, J. I. Lunine, C. P. McKay, X. Moussas, I. Müller-Wodarg, F. Neubauer, T. C. Owen, F. Raulin, E. C. Sittler, F. Sohl, C. Sotin, G. Tobie, T. Tokano, E. P. Turtle, J.-E. Wahlund, J. H. Waite, K. H. Baines, J. Blamont, A. J. Coates, I. Dandouras, T. Krimigis, E. Lellouch, R. D. Lorenz, A. Morse, C. C. Porco, M. Hirtzig, J. Saur, T. Spilker, J. C. Zarnecki, E. Choi, N. Achilleos, R. Amils, P. Annan, D. H. Atkinson, Y. Bénilan, C. Bertucci, B. Bézard, G. L. Bjoraker, M. Blanc, L. Boireau, J. Bouman, M. Cabane, M. T. Capria, E. Chassefière, P. Coll, M. Combes, J. F. Cooper, A. Coradini, F. Crary, T. Cravens, I. A. Daglis, E. de Angelis, C. de Bergh, I. de Pater, C. Dunford, G. Durry, O. Dutuit, D. Fairbrother, F. M. Flasar, A. D. Fortes, R. Frampton, M. Fujimoto, M. Galand, O. Grasset, M. Grott, T. Haltigin, A. Herique, F. Hersant, H. Hussmann, W. Ip, R. Johnson, E. Kallio, S. Kempf, M. Knapmeyer, W. Kofman, R. Koop, T. Kostiuk, N. Krupp, M. Küppers, H. Lammer, L.-M. Lara, P. Lavvas, S. Le Mouélic, S. Lebonnois, S. Ledvina, J. Li, T. A. Livengood, R. M. Lopes, J.-J. Lopez-Moreno, D. Luz, P. R. Mahaffy, U. Mall, J. Martinez-Frias, B. Marty, T. McCord, C. Menor Salvan, A. Milillo, D. G. Mitchell, R. Modolo, O. Mousis, M. Nakamura, C. D. Neish, C. A. Nixon, D. Nna Mvondo, G. Orton, M. Paetzold, J. Pitman, S. Pogrebenko, W. Pollard, O. Prieto-Ballesteros, P. Rannou, K. Reh, L. Richter, F. T. Robb, R. Rodrigo, S. Rodriguez, P. Romani, M. Ruiz Bermejo, E. T. Sarris, P. Schenk, B. Schmitt, N. Schmitz, D. Schulze-Makuch, K. Schwingenschuh, A. Selig, B. Sicardy, L. Soderblom, L. J. Spilker, D. Stam, A. Steele, K. Stephan, D. F. Strobel, K. Szego, C. Szopa, R. Thissen, M. G. Tomasko, D. Toublanc, H. Vali, I. Vardavas, V. Vuitton, R. A. West, R. Yelle, E. F. Young
TandEM was proposed as an L-class (large) mission in response to ESA’s Cosmic Vision 2015–2025 Call, and accepted for further studies, with the goal of exploring Titan and Enceladus. The mission concept is to perform in situ investigations of two worlds tied together by location and properties, whose remarkable natures have been partly revealed by the ongoing Cassini–Huygens mission. These bodies ...... hiện toàn bộ
Proton irradiation of plastic scintillator bars for POLAR-2
Experimental Astronomy - Tập 56 - Trang 355-370 - 2023
Slawomir Mianowski, Nicolas De Angelis, Kamil Brylew, Johannes Hulsman, Tomasz Kowalski, Sebastian Kusyk, Zuzanna Mianowska, Jerzy Mietelski, Dominik Rybka, Jan Swakon, Damian Wrobel
POLAR-2, a plastic scintillator based Compton polarimeter, is currently under development and planned for a launch to the China Space Station in 2025. It is intended to shed a new light on our understanding of Gamma-Ray Bursts by performing high precision polarization measurements of their prompt emission. The instrument will be orbiting at an average altitude of 383 km with an inclination of 42° ...... hiện toàn bộ
Tracing and using data lineage for pipeline processing in Astro-WISE
Experimental Astronomy - Tập 35 - Trang 131-155 - 2011
Johnson Mwebaze, Danny Boxhoorn, Edwin A. Valentijn
Most workflow systems that support data provenance primarily focus on tracing lineage of data. Data provenance by data lineage provides the derivation history of data including information about services and input data that contributed to the creation of a data product. We show that tracing lineage by means of full backward chaining not only enables users to share, discover and reuse the data, but...... hiện toàn bộ
JP3D compression of solar data-cubes: Photospheric imaging and spectropolarimetry
Experimental Astronomy - - 2016
Dario Del Moro, Luca Giovannelli, Ermanno Pietropaolo, Francesco Berrilli
Hyperspectral imaging is an ubiquitous technique in solar physics observations and the recent advances in solar instrumentation enabled us to acquire and record data at an unprecedented rate. The huge amount of data which will be archived in the upcoming solar observatories press us to compress the data in order to reduce the storage space and transfer times. The correlation present over all dimen...... hiện toàn bộ
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