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Статті в журналах з теми "Instrumentation, Techniques, and Astronomical Observations"
Sawant, Sailee M., and Daniel Batcheldor. "Charge-injection Device Imaging of Sirius with Contrast Ratios Greater than 1:26 Million." Publications of the Astronomical Society of the Pacific 134, no. 1033 (March 1, 2022): 034503. http://dx.doi.org/10.1088/1538-3873/ac54c2.
Повний текст джерелаDe la Luz, Victor, J. Americo Gonzalez-Esparza, Maria A. Sergeeva, Pedro Corona-Romero, L. Xavier González, Julio C. Mejia-Ambriz, Jose F. Valdés-Galicia, et al. "First joint observations of space weather events over Mexico." Annales Geophysicae 36, no. 5 (October 11, 2018): 1347–60. http://dx.doi.org/10.5194/angeo-36-1347-2018.
Повний текст джерелаLi, T. P. "Imaging in Hard X-ray Astronomy." Symposium - International Astronomical Union 214 (2003): 70–83. http://dx.doi.org/10.1017/s0074180900194173.
Повний текст джерелаModiri, Sadegh, Robert Heinkelmann, Santiago Belda, Zinovy Malkin, Mostafa Hoseini, Monika Korte, José M. Ferrándiz, and Harald Schuh. "Towards Understanding the Interconnection between Celestial Pole Motion and Earth’s Magnetic Field Using Space Geodetic Techniques." Sensors 21, no. 22 (November 13, 2021): 7555. http://dx.doi.org/10.3390/s21227555.
Повний текст джерелаDrew, Patrick M., and Caitlin M. Casey. "No Redshift Evolution of Galaxies’ Dust Temperatures Seen from 0 < z < 2." Astrophysical Journal 930, no. 2 (May 1, 2022): 142. http://dx.doi.org/10.3847/1538-4357/ac6270.
Повний текст джерелаYoshizawa, M. "New Astrometric Instrumentation in Japan." Symposium - International Astronomical Union 166 (1995): 31–34. http://dx.doi.org/10.1017/s0074180900227794.
Повний текст джерелаDavydov, V. Yu. "Compensation of refraction in astronomical interference observations." Measurement Techniques 36, no. 6 (June 1993): 662–67. http://dx.doi.org/10.1007/bf00980011.
Повний текст джерелаBranham, Richard L. "Techniques for dealing with discordant observations." Symposium - International Astronomical Union 114 (1986): 229–31. http://dx.doi.org/10.1017/s0074180900148247.
Повний текст джерелаGuélin, Michel. "Radio and Millimetre Observations of Less Complex Molecules." Symposium - International Astronomical Union 120 (1987): 171–81. http://dx.doi.org/10.1017/s0074180900153987.
Повний текст джерелаEdberg, Stephen J. "Working with Amateur Astronomers." International Astronomical Union Colloquium 98 (1988): 95–99. http://dx.doi.org/10.1017/s0252921100092307.
Повний текст джерелаДисертації з теми "Instrumentation, Techniques, and Astronomical Observations"
Isaak, Katherine Gudrun. "Low-noise instrumentation and astronomical observations of high-redshift objects in submillimetre wavelengths." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364389.
Повний текст джерелаChippendale, Aaron Paul. "Detecting cosmological reionization on large scales through the 21 cm HI line." University of Sydney, 2009. http://hdl.handle.net/2123/6256.
Повний текст джерелаThis thesis presents the development of new techniques for measuring the mean redshifted 21 cm line of neutral hydrogen during reionization. This is called the 21 cm cosmological reionization monopole. Successful observations could identify the nature of the first stars and test theories of galaxy and large-scale structure formation. The goal was to specify, construct and calibrate a portable radio telescope to measure the 21 cm monopole in the frequency range 114 MHz to 228 MHz, which corresponds to the redshift range 11.5 > z > 5.2. The chosen approach combined a frequency independent antenna with a digital correlation spectrometer to form a correlation radiometer. The system was calibrated against injected noise and against a modelled galactic foreground. Components were specified for calibration of the sky spectrum to 1 mK/MHz relative accuracy. Comparing simulated and measured spectra showed that bandpass calibration is limited to 11 K, that is 1% of the foreground emission, due to larger than expected frequency dependence of the antenna pattern. Overall calibration, including additive contributions from the system and the radio foreground, is limited to 60 K. This is 160 times larger than the maximum possible monopole amplitude at redshift eight. Future work will refine and extend the system known as the Cosmological Reionization Experiment Mark I (CoRE Mk I).
Wu, Ya-Lin, Laird M. Close, Vanessa P. Bailey, Timothy J. Rodigas, Jared R. Males, Katie M. Morzinski, Katherine B. Follette, et al. "MAGELLAN AO SYSTEM z ′, Y S , AND L ′ OBSERVATIONS OF THE VERY WIDE 650 AU HD 106906 PLANETARY SYSTEM." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621262.
Повний текст джерелаMate, Sujay. "Développement d'un simulateur du ciel pour les instruments à grand champ de vue X-gamma en orbite terrestre basse : application à l'évaluation des performances du spectro-imageur SVOM-ECLAIRs." Thesis, Toulouse 3, 2021. http://www.theses.fr/2021TOU30031.
Повний текст джерелаGamma-Ray Bursts (GRBs) are the most luminous explosions in the universe. They are observed as bright flashes of gamma/X-rays (lasting a few milliseconds to a few tens of seconds) followed by an "afterglow" emission (usually at longer wavelengths). They are produced either due to the merger of two compact objects (a pair of neutron stars or a neutron star and a black hole) or due to the core collapse of a massive star (> 15 solar mass). GRBs are excellent candidates to study physics at extreme energies and densities. They also constitute important astrophysical tools to probe the history of the universe as they are observed at all epochs. The upcoming (June 2022) Sino-French mission SVOM (Space-based multi-band astronomical Variable Objects Monitor) aims to detect and study GRBs using dedicated space and ground based instruments to obtain multi-wavelength coverage. The primary instrument onboard SVOM spacecraft is ECLAIRs, a wide-field (~ 2 sr) coded-mask imager sensitive in the 4 - 150 keV energy range. ECLAIRs will detect and localise GRBs (and other high energy transients) in near real time using an onboard trigger. ECLAIRs will encounter a high and variable background due to the wide field-of-view (FoV) and the pointing strategy of SVOM which makes the Earth transit through the FoV. A new method (called Particle Interaction Recycling Approach or PIRA), based on Monte-Carlo simulations (GEANT4), was developed to estimate the variable background accurately and rapidly. The simulations of the background are complemented with simulations of X-ray sources and gamma-ray bursts to generate complete observation scenarios. The variable background of ECLAIRs poses challenges to detect GRBs and affects the sensitivity of the instrument. We use the simulated data to evaluate the performance of the onboard trigger, in particular, the impact of the variable background and its sensitivity to the GRB characteristics (duration, temporal profile, spectral shape,position in the FoV). ECLAIRs will send all detected photons to the ground. In addition, the availability of a larger computational power and the better knowledge of the context (e.g. background variations, sources in the FoV, etc.) on the ground motivates us to develop an "offline trigger" to overcome the challenges faced by the onboard trigger. An algorithm based on wavelet transforms is proposed to detect GRBs as part of the offline trigger. The work in this thesis, i.e. the development of PIRA, instrument's performance evaluation and development of a trigger method, provides a sound basis to build an effective offline trigger that will complement the onboard trigger and improve the overall performance of the SVOM mission
Daigle, Olivier. "Spectro-imagerie optique à faible flux et comparaison de la cinématique Hα et HI d'un échantillon de galaxies proches". Aix-Marseille 1, 2010. http://www.theses.fr/2010AIX10141.
Повний текст джерелаA new EMCCD (Electron multiplying Charge Coupled Device) controller is presented. It allows the EMCCD to be used for photon counting by drastically taking down its dominating source of noise : the clock induced charges. A new EMCCD camera was built using this controller. It has been characterized in laboratory and tested at the observatoire du mont Mégantic. When compared to the previous generation of photon counting cameras based on intensifier tubes, this new camera renders the observation of the galaxies kinematics with an integral field spectrometer with a Fabry-Perot interferometer in Ha light much faster, and allows fainter galaxies to be observed. The integration time required to reach a given signal-to-noise ratio is about 4 times less than with the intensifier tubes. Many applications could benefit of such a camera: fast, faint flux photometry, high spectral and temporal resolution spectroscopy, earth-based diffraction limited imagery (lucky imaging), etc. Technically, the camera is dominated by the shot noise for flux higher than 0. 002 photon/pixel/image. The 21 cm emission line of the neutral hydrogen (HI) is often used to map the galaxies kinematics. The extent of the distribution of the neutral hydrogen in galaxies, which goes well beyond the optical disk, is one of the reasons this line is used so often. However, the spatial resolution of such observations is limited when compared to their optical equivalents. When comparing the HI data to higher resolution ones, some differences were simply attributed to the beam smearing of the HI caused by its lower resolution. The THINGS (The HI Nearby Galaxy Survey) project observed many galaxies of the SINGS (Spitzer Infrared Nearby Galaxies Survey) project. The kinematics of THINGS will be compared to the kinematic data of the galaxies obtained in Ha light. The comparison will try to determine whether the sole beam smearing is responsible of the differences observed. The results shows that intrinsic dissimilarities between the kinematical tracers used are responsible of some of the observed disagreements. The understanding of theses differences is of a high importance as the dark matter distribution, inferred from the rotation of the galaxies, is a test to some cosmological models
Lamb, Masen. "On the calibration and use of Adaptive Optics systems: RAVEN observations of metal-poor stars in the Galactic Bulge and the application of focal plane wavefront sensing techniques." Thesis, 2017. https://dspace.library.uvic.ca//handle/1828/8368.
Повний текст джерелаGraduate
Damjanov, Ivana. "Structural Evolution of Quiescent Galaxies from the Peak of the Cosmic Star Formation Epoch." Thesis, 2011. http://hdl.handle.net/1807/31729.
Повний текст джерелаSteinbring, Eric. "Techniques in high resolution observations from the ground and space, and imaging of the merging environments of radio galaxies at redshift 1 to 4." Thesis, 2000. https://dspace.library.uvic.ca//handle/1828/9861.
Повний текст джерелаGraduate
Ingraham, Patrick. "Détection et caractérisation de naines brunes et exoplanètes avec un filtre accordable pour applications dans l'espace." Thèse, 2013. http://hdl.handle.net/1866/9194.
Повний текст джерелаThis thesis determines the capability of detecting faint companions in the presence of speckle noise when performing space-based high-contrast imaging through spectral differential imagery (SDI) using a low-order Fabry-Perot etalon as a tunable filter. The performance of such a tunable filter is illustrated through the Tunable Filter Imager (TFI), an instrument designed for the James Webb Space Telescope (JWST). Using a TFI prototype etalon and a custom designed test bed, the etalon’s ability to perform speckle-suppression through SDI is demonstrated experimentally. Improvements in contrast vary with separation, ranging from a factor of 10 at working angles greater than 11 lambda/D and increasing up to a factor of 60 at 5 lambda/D. These measurements are consistent with a Fresnel optical propagation model which shows the speckle suppression capability is limited by the test bed and not the etalon. This result demonstrates that a tunable filter is an attractive option to perform high-contrast imaging through SDI. To explore the capability of space-based SDI using an etalon, we perform an end-to-end Fresnel propagation of JWST and TFI. Using this simulation, a contrast improvement ranging from a factor of 7 to 100 is predicted, depending on the instrument’s configuration. The performance of roll-subtraction is simulated and compared to that of SDI. The SDI capability of the Near-Infrared Imager and Slitless Spectrograph (NIRISS), the science instrument module to replace TFI in the JWST Fine Guidance Sensor is also determined. Using low resolution, multi-band (0.85-2.4 um) multi-object spectroscopy, 104 objects towards the central region of the Orion Nebular Cluster have been assigned spectral types including 7 new brown dwarfs, and 4 new planetary mass candidates. These objects are useful for determining the substellar initial mass function and for testing evolutionary and atmospheric models of young stellar and substellar objects. Using the measured H band magnitudes, combined with our determined extinction values, the classified objects are used to create an Hertzsprung-Russell diagram for the cluster. Our results indicate a single epoch of star formation beginning 1 Myr ago. The initial mass function of the cluster is derived and found to be consistent with the values determined for other young clusters and the galactic disk.
Della, Ceca Lara Sofía. "Análisis espacio-temporal de la distribución de aerosoles atmosféricos en la ciudad de Córdoba (Argentina) y desarrollo de un modelo predictivo de los niveles de material particulado." Master's thesis, 2018. http://hdl.handle.net/11086/6009.
Повний текст джерелаMaestría conjunta con el Instituto de Altos Estudios Espaciales "Mario Gulich"-CONAE.
En esta tesis se estudia la variabilidad espacio-temporal de los aerosoles atmosféricos en la ciudad de Córdoba (Argentina) y sus alrededores para un período mayor a 10 años (2003-2013), mediante el uso del producto satelital espesor óptico de aerosoles (o AOD por Aerosol Optical Depth, en inglés) de frecuencia diaria obtenido con el algoritmo denominado implementación de corrección atmosférica multi-ángulo (MAIAC) que ha sido recientemente desarrollado para los datos obtenidos con el sensor MODIS (a bordo de los satélites Terra y Aqua/NASA). Hasta el momento; los productos de AOD disponibles presentaban resoluciones espaciales mayores a 3 km, adecuados para estudios a escala regional. Sin embargo no proveían suficiente detalle para el estudio de áreas urbanas o para estudios epidemiológicos. Con este objetivo se desarrolló este nuevo algoritmo, aún en fase de prueba, que mejora sensiblemente la resolución espacial a 1 km, con lo cual resulta más apropiado para el estudio de los aerosoles atmosféricos a escala urbana. En este trabajo, en una primera instancia se evaluó la performance del producto AOD-MAIAC mediante la comparación con valores de AOD obtenidos desde superficie en la estación Córdoba-CETT de la red AERONET. Se analizó la concentración y variación anual de los aerosoles, así como su variación mensual y estacional. Por último, se estudió la relación entre los valores satelitales de AOD-MAIAC y valores de material particulado (PM) obtenidos desde la superficie por una estación de monitoreo de la Municipalidad de Córdoba que funcionó en el centro de la ciudad durante enero-agosto de 2009. En general, el algoritmo MAIAC presentó una buena performance en el área de estudio. Los resultados reflejaron que, a pesar de que los valores de AOD son bajos respecto a otros sitios del mundo muy contaminados, existe una tendencia de incremento de AOD a lo largo del tiempo particularmente en algunas zonas de la ciudad (como por ejemplo el acceso a Sierras Chicas y la zona norte de la ciudad) que podría estar vinculado al aumento de la densidad poblacional en esa área y el consecuente incremento del tránsito vehicular. Además se observó un patrón de incremento o disminución en los niveles de AOD en determinados momentos del año. Durante los meses de verano (diciembre-febrero) se observaron valores relativamente altos concentrados en la ciudad de Córdoba, en las principales vías de acceso hacia las zonas turísticas así como en el anillo de circunvalación de la ciudad Hacia el otoño los valores de AOD comienzan a disminuir hasta alcanzar los valores más bajos durante los meses de invierno. A partir de agosto se observa un gran incremento del AOD que tiene su pico máximo durante septiembre y se mantiene elevado durante el resto de la primavera. Este incremento de AOD coincide con 2la estación de quema de biomasa en la provincia de Córdoba, el norte argentino y otras regiones de Sudamérica (Bolivia, Paraguay, Amazonia y Cerrado en Brasil) y evidencia la importancia del transporte atmosférico a escala regional pero también continental de material particulado que es liberado a la atmósfera durante los incendios. Los modelos de regresión lineal desarrollados en este estudio para evaluar la relación entre AOD-PM y variables meteorológicas no son suficientes para explicar la variabilidad de los datos de PM medidos en superficie a partir de los valores satelitales de AOD y las variables meteorológicas. Sin embargo, los resultados presentados constituyen un primer estudio exploratorio para la ciudad de Córdoba. Dada la falta de estaciones superficiales de monitoreo de material particulado en Argentina, y en particular en la ciudad de Córdoba, este estudio intentó ser una línea de base para el estudio de la dinámica de los aerosoles atmosféricos a escala urbana a partir de información satelital y constituye una primera aproximación a la problemática.
Fil: Della Ceca, Lara Sofía. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía, Física y Computación; Argentina.
Fil: Della Ceca, Lara Sofía. Universidad Nacional de Córdoba. Instituto de Altos Estudios Espaciales Mario Gulich; Argentina.
Книги з теми "Instrumentation, Techniques, and Astronomical Observations"
Observational astronomy: Techniques and instrumentation. Cambridge: Cambridge University Press, 2011.
Знайти повний текст джерела(Society), SPIE, ed. Solar physics and space weather instrumentation III: 4-6 August 2009, San Diego, California, United States. Bellingham, Wash: SPIE, 2009.
Знайти повний текст джерела(Society), SPIE, ed. Solar physics and space weather instrumentation II: 26-27 August 2007, San Diego, California, USA. Bellingham, Wash: SPIE, 2007.
Знайти повний текст джерелаSociety, American Astronomical, and SPIE (Society), eds. Modern technologies in space- and ground-based telescopes and instrumentation: 27 June-2 July 2010, San Diego, California, United States. Bellingham, Wash: SPIE, 2010.
Знайти повний текст джерелаservice), SpringerLink (Online, ed. Ancient Astronomical Observations and the Study of the Moon’s Motion (1691-1757). Boston, MA: Springer US, 2012.
Знайти повний текст джерелаTopical Meeting on Laser and Optical Remote Sensing (1987 North Falmouth, Mass.). Topical Meeting on Laser and Optical Remote Sensing: Instrumentation and techniques technical digest : summaries of papers presented at the Laser and Optical Remote Sensing : instrumentation and techniques Topical Meeting, September 28-October 1, 1987, North Falmo[u]th, Massachusetts. Washington, D.C: Optical Society of America, 1987.
Знайти повний текст джерелаservice), SpringerLink (Online, ed. One-Shot Color Astronomical Imaging: In Less Time, For Less Money! Boston, MA: Springer US, 2012.
Знайти повний текст джерелаservice), SpringerLink (Online, ed. Grating Spectroscopes and How to Use Them. Boston, MA: Springer US, 2012.
Знайти повний текст джерелаSoffel, Michael. Space-Time Reference Systems. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.
Знайти повний текст джерелаSherrod, P. Clay, and Thomas L. Koed. Complete Manual of Amateur Astronomy: Tools and Techniques for Astronomical Observations. Dover Publications, Incorporated, 2012.
Знайти повний текст джерелаЧастини книг з теми "Instrumentation, Techniques, and Astronomical Observations"
Heidt, Jochen. "Hardware for Near-Infrared Observations—Adaptive Optics, Instrumentation, and Detectors." In Astronomy in the Near-Infrared - Observing Strategies and Data Reduction Techniques, 61–129. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98441-0_4.
Повний текст джерелаMoon, Dae-Sik. "Calibration Techniques." In The WSPC Handbook of Astronomical Instrumentation, 227–44. WORLD SCIENTIFIC, 2021. http://dx.doi.org/10.1142/9789811203787_0012.
Повний текст джерелаClarke, Fraser, and Matthias Tecza. "Integral Field Techniques." In The WSPC Handbook of Astronomical Instrumentation, 257–83. WORLD SCIENTIFIC, 2021. http://dx.doi.org/10.1142/9789811203794_0014.
Повний текст джерелаBeckers, J. M. "Techniques for High Angular Resolution Astronomical Imaging." In Instrumentation for Large Telescopes, 1–34. Cambridge University Press, 1997. http://dx.doi.org/10.1017/cbo9780511564932.002.
Повний текст джерелаHopmans, Jan W., and Jan M. H. Hendrickx. "Emerging Measurement Techniques for Vadose Zone Characterization." In Vadose Zone Hydrology. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195109900.003.0015.
Повний текст джерелаKallio, Ulla, Thomas Klügel, Simo Marila, Swetlana Mähler, Markku Poutanen, Timo Saari, Torben Schüler, and Heli Suurmäki. "Datum Problem Handling in Local Tie Surveys at Wettzell and Metsähovi." In International Association of Geodesy Symposia. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/1345_2022_155.
Повний текст джерелаТези доповідей конференцій з теми "Instrumentation, Techniques, and Astronomical Observations"
Maire, Jerome, Aziz Ziad, Julien Borgnino, Francois Martin, and Denis Mourard. "Optimization of the observations of the high angular resolution techniques (adaptive optics and interferometry)." In SPIE Astronomical Telescopes + Instrumentation. SPIE, 2004. http://dx.doi.org/10.1117/12.562957.
Повний текст джерелаDemangeon, Olivier, Peter A. Schuller, Alain Léger, and Philippe Duret. "Toward the stability required for direct observations of exoplanets with nulling interferometry technique." In SPIE Astronomical Telescopes + Instrumentation. SPIE, 2010. http://dx.doi.org/10.1117/12.857209.
Повний текст джерелаCramer, Claire E., Steven W. Brown, Keith R. Lykke, John T. Woodward, Stephen Bailey, David J. Schlegel, Adam S. Bolton, et al. "Tunable laser techniques for improving the precision of observational astronomy." In SPIE Astronomical Telescopes + Instrumentation, edited by Ramón Navarro, Colin R. Cunningham, and Eric Prieto. SPIE, 2012. http://dx.doi.org/10.1117/12.925198.
Повний текст джерелаMillar-Blanchaer, Maxwell A., Marshall D. Perrin, Li-Wei Hung, Michael P. Fitzgerald, Jason J. Wang, Jeffrey Chilcote, James R. Graham, Sebastian Bruzzone, and Paul G. Kalas. "GPI observational calibrations XIV: polarimetric contrasts and new data reduction techniques." In SPIE Astronomical Telescopes + Instrumentation, edited by Christopher J. Evans, Luc Simard, and Hideki Takami. SPIE, 2016. http://dx.doi.org/10.1117/12.2233071.
Повний текст джерелаHaig, Douglas J., Peter A. R. Ade, James E. Aguirre, James J. Bock, Samantha F. Edgington, Melissa L. Enoch, Jason Glenn, et al. "Bolocam: status and observations." In SPIE Astronomical Telescopes + Instrumentation, edited by Jonas Zmuidzinas, Wayne S. Holland, and Stafford Withington. SPIE, 2004. http://dx.doi.org/10.1117/12.553154.
Повний текст джерелаStecklum, Bringfried, Thomas Henning, Markus Feldt, P. Hofner, M. G. Hoare, and Thomas L. Hayward. "Adaptive optics observations of young massive stars." In Astronomical Telescopes & Instrumentation, edited by Domenico Bonaccini and Robert K. Tyson. SPIE, 1998. http://dx.doi.org/10.1117/12.321737.
Повний текст джерелаKlvaňa, Miroslav, Michal Sobotka, and Michal Švanda. "Optimisation of solar synoptic observations." In SPIE Astronomical Telescopes + Instrumentation, edited by Alison B. Peck, Robert L. Seaman, and Fernando Comeron. SPIE, 2012. http://dx.doi.org/10.1117/12.925317.
Повний текст джерелаGoodwin, Michael, Charles Jenkins, Peter Conroy, and Andrew Lambert. "Observations of ground-layer turbulence." In SPIE Astronomical Telescopes + Instrumentation, edited by Norbert Hubin, Claire E. Max, and Peter L. Wizinowich. SPIE, 2008. http://dx.doi.org/10.1117/12.787732.
Повний текст джерелаKeller, Christoph U. "SOLIS: a modern facility for synoptic solar observations." In Astronomical Telescopes & Instrumentation, edited by Larry M. Stepp. SPIE, 1998. http://dx.doi.org/10.1117/12.319288.
Повний текст джерелаHochedez, Jean-Francois E., Udo H. Schuehle, Jose L. Pau, Jose Alvarez, Olivier Hainaut, Thierry P. Appourchaux, F. D. Auret, et al. "New UV detectors for solar observations." In Astronomical Telescopes and Instrumentation, edited by Stephen L. Keil and Sergey V. Avakyan. SPIE, 2003. http://dx.doi.org/10.1117/12.460367.
Повний текст джерела