Relevant bibliographies by topics / Transits

Academic literature on the topic 'Transits'

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Published: 4 June 2021
Last updated: 30 July 2024

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Journal articles on the topic "Transits"

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Oddo, Dominic, Diana Dragomir, Alexis Brandeker, Hugh P. Osborn, Karen Collins, Keivan G. Stassun, Nicola Astudillo-Defru, et al. "Characterization of a Set of Small Planets with TESS and CHEOPS and an Analysis of Photometric Performance." Astronomical Journal 165, no. 3 (February 28, 2023): 134. http://dx.doi.org/10.3847/1538-3881/acb4e3.

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Abstract The radius valley carries implications for how the atmospheres of small planets form and evolve, but this feature is visible only with highly precise characterizations of many small planets. We present the characterization of nine planets and one planet candidate with both NASA TESS and ESA CHEOPS observations, which adds to the overall population of planets bordering the radius valley. While five of our planets—TOI 118 b, TOI 262 b, TOI 455 b, TOI 560 b, and TOI 562 b—have already been published, we vet and validate transit signals as planetary using follow-up observations for four new TESS planets, including TOI 198 b, TOI 244 b, TOI 444 b, and TOI 470 b. While a three times increase in primary mirror size should mean that one CHEOPS transit yields an equivalent model uncertainty in transit depth as about nine TESS transits in the case that the star is equally as bright in both bands, we find that our CHEOPS transits typically yield uncertainties equivalent to between two and 12 TESS transits, averaging 5.9 equivalent transits. Therefore, we find that while our fits to CHEOPS transits provide overall lower uncertainties on transit depth and better precision relative to fits to TESS transits, our uncertainties for these fits do not always match expected predictions given photon-limited noise. We find no correlations between number of equivalent transits and any physical parameters, indicating that this behavior is not strictly systematic, but rather might be due to other factors such as in-transit gaps during CHEOPS visits or nonhomogeneous detrending of CHEOPS light curves.
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Zuckerman, Anna, James R. A. Davenport, Steve Croft, Andrew Siemion, and Imke de Pater. "The Breakthrough Listen Search for Intelligent Life: Detection and Characterization of Anomalous Transits in Kepler Lightcurves." Astronomical Journal 167, no. 1 (December 13, 2023): 20. http://dx.doi.org/10.3847/1538-3881/acfa6c.

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Abstract Never before has the detection and characterization of exoplanets via transit photometry been as promising and feasible as it is now, due to the increasing breadth and sensitivity of time domain optical surveys. Past works have made use of phase-folded stellar lightcurves in order to study the properties of exoplanet transits because this provides the highest signal that a transit is present at a given period and ephemeris. Characterizing transits on an individual, rather than phase-folded, basis is much more challenging due to the often low signal-to-noise ratio of lightcurves, missing data, and low sampling rates. However, by phase folding a lightcurve we implicitly assume that all transits have the same expected properties, and lose all information about the nature and variability of the transits. We miss the natural variability in transit shapes, or even the deliberate or inadvertent modification of transit signals by an extraterrestrial civilization (for example, via laser emission or orbiting megastructures). In this work, we develop an algorithm to search stellar lightcurves for individual anomalous (in timing or depth) transits, and we report the results of that search for 218 confirmed transiting exoplanet systems from Kepler.
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Heller, René, and Michael Hippke. "Signal preservation of exomoon transits during light curve folding." Astronomy & Astrophysics 657 (January 2022): A119. http://dx.doi.org/10.1051/0004-6361/202142403.

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In the search for moons around extrasolar planets (exomoons), astronomers are confronted with a stunning observation. Although 3400 of the 4500 exoplanets were discovered with the transit method and although there are well over 25 times as many moons than planets known in the Solar System (two of which are larger than Mercury), no exomoon has been discovered to date. In the search for exoplanet transits, stellar light curves are usually phase-folded over a range of trial epochs and periods. This approach, however, is not applicable in a straightforward manner to exomoons. Planet-moon transits either have to be modeled in great detail (including their orbital dynamics, mutual eclipses, etc.), which is computationally expensive, or key simplifications have to be assumed in the modeling. One such simplification is to search for moon transits outside of the planetary transits. The question we address in this report is how much in-transit data of an exomoon remains uncontaminated by the near-simultaneous transits of its host planet. We develop an analytical framework based on the probability density of the sky-projected apparent position of an exomoon relative to its planet and test our results with a numerical planet-moon transit simulator. For exomoons with planet-moon orbital separations similar to the Galilean moons, we find that only a small fraction of their in-transit data is uncontaminated by planetary transits: 14% for Io, 20% for Europa, 42% for Ganymede, and 73% for Callisto. The signal-to-noise ratio (S/N) of an out-of-planetary-transit folding technique is reduced compared to a full photodynamical model to about 38% (Io), 45% (Europa), 65% (Ganymede), and 85% (Callisto), respectively. For the Earth’s Moon, we find an uncontaminated data fraction of typically just 18% and a resulting S/N reduction to 42%. These values are astonishingly small and suggest that the gain in speed for any exomoon transit search algorithm that ignores the planetary in-transit data comes at the heavy price of losing a substantial fraction of what is supposedly a tiny signal in the first place. We conclude that photodynamical modeling of the entire light curve has substantial, and possibly essential, advantages over folding techniques of exomoon transits outside the planetary transits, in particular for small exomoons comparable to those of the Solar System.
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Wittrock, Justin M., Stefan Dreizler, Michael A. Reefe, Brett M. Morris, Peter P. Plavchan, Patrick J. Lowrance, Brice-Olivier Demory, et al. "Transit Timing Variations for AU Microscopii b and c." Astronomical Journal 164, no. 1 (June 30, 2022): 27. http://dx.doi.org/10.3847/1538-3881/ac68e5.

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Abstract We explore the transit timing variations (TTVs) of the young (22 Myr) nearby AU Mic planetary system. For AU Mic b, we introduce three Spitzer (4.5 μm) transits, five TESS transits, 11 LCO transits, one PEST transit, one Brierfield transit, and two transit timing measurements from Rossiter–McLaughlin observations; for AU Mic c, we introduce three TESS transits. We present two independent TTV analyses. First, we use EXOFASTv2 to jointly model the Spitzer and ground-based transits and obtain the midpoint transit times. We then construct an O − C diagram and model the TTVs with Exo-Striker. Second, we reproduce our results with an independent photodynamical analysis. We recover a TTV mass for AU Mic c of 10.8 − 2.2 + 2.3 M ⊕. We compare the TTV-derived constraints to a recent radial velocity (RV) mass determination. We also observe excess TTVs that do not appear to be consistent with the dynamical interactions of b and c alone or due to spots or flares. Thus, we present a hypothetical nontransiting “middle-d” candidate exoplanet that is consistent with the observed TTVs and candidate RV signal and would establish the AU Mic system as a compact resonant multiplanet chain in a 4:6:9 period commensurability. These results demonstrate that the AU Mic planetary system is dynamically interacting, producing detectable TTVs, and the implied orbital dynamics may inform the formation mechanisms for this young system. We recommend future RV and TTV observations of AU Mic b and c to further constrain the masses and confirm the existence of possible additional planet(s).
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Castellano, T., L. Doyle, and D. McIntosh. "The Visibility of Earth Transits." Symposium - International Astronomical Union 202 (2004): 445–47. http://dx.doi.org/10.1017/s0074180900218457.

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The recent photometric detection of planetary transits of the solar-like star HD 209458 at a distance of 47 parsecs suggest that transits can reveal the presence of Jupiter-size planetary companions in the solar neighborhood (Charbonneau et al. 2000; Henry et al. 2000). Recent space-based transit searches have achieved photometric precision within an order of magnitude of that required to detect the much smaller transit signal of an earth-size planet across a solar-size star. Laboratory experiments in the presence of realistic noise sources have shown that CCDs can achieve photometric precision adequate to detect the 9.6 E-5 dimming of the Sun due to a transit of the Earth (Borucki et al. 1997; Koch et al. 2000). Space-based solar irradiance monitoring has shown that the intrinsic variability of the Sun would not preclude such a detection (Borucki, Scargle, Hudson 1985). Transits of the Sun by the Earth would be detectable by observers that reside within a narrow band of sky positions near the ecliptic plane, if the observers possess current Earth epoch levels of technology and astronomical expertise. A catalog of solar-like stars that satisfy the geometric condition for Earth transit visibility are presented.
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Tingley, Brandon. "Transits in Poorly Sampled Data – Gaia and Beyond." Proceedings of the International Astronomical Union 4, S253 (May 2008): 386–87. http://dx.doi.org/10.1017/s1743921308026719.

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AbstractGaia, an ESA cornerstone mission, will obtain of the order of 100 high-precision photometric observations over five years for tens of millions of stars with V < 17. The vast number of red dwarfs in this data set, with their correspondingly deep (high S/N) transits, makes it worthwhile to explore the possibility of detecting transits in such data. Searching for transits under these circumstances requires a very different approach from that used for a normal, highly-sampled transit survey if the search is to be performed in a reasonable amount of time. It should be possible to identify a portion of the transiting Hot Jupiter/M dwarf systems in the data set, if the photometry is as stable and precise as specified by design. This same approach could be applied to ground-based transit searches – a transit survey targeted at red dwarfs with Jupiter-sized companions.
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Jin, Haitao, Fengjun Jin, Jiao’e Wang, Wei Sun, and Libo Dong. "Competition and Cooperation between Shared Bicycles and Public Transit: A Case Study of Beijing." Sustainability 11, no. 5 (March 3, 2019): 1323. http://dx.doi.org/10.3390/su11051323.

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As an eco-friendly transportation mode, shared bicycles provide a new option for public transit users in urban areas. China’s bicycle-sharing market began flourishing in July 2016 and reached a plateau in 2017. How shared bicycles influenced public transit systems during this period is an interesting topic. A case study of Beijing is conducted. This study aims to identify the competitive and cooperative influences of shared bicycles on public transit by exploring the changes in public transit trip distances before and after the upsurge in bicycle-sharing. A histogram shifting method is introduced to examine the influences of shared bicycles on public transit services from a travel distance perspective. A spatial correlation of bicycling usage and public transit changes is calculated using units of gridded cell spaces. The results show: (1) overall transit usage continued growing after the shared bicycles market reached a plateau; (2) short public transits within 2 km decreased while transfers within 2 km increased; and (3) the decrease of short transits and increase of transfers within 3 km were spatially highly correlated to the usage of shared bicycles. Hence, the role of bicycle-sharing systems is competitive for existing public transit systems during short trips and cooperative for connecting transits.
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Schneider, Glenn, Jay M. Pasachoff, and Leon Golub. "Space Studies of the Black-Drop Effect at a Mercury Transit." Highlights of Astronomy 13 (2005): 70–72. http://dx.doi.org/10.1017/s1539299600015100.

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AbstractTransits of Mercury and Venus across the face of the Sun are rare. The 20th century had 15 transits of Mercury and the 21st century will have 14, the two most recent occurring on 15 November 1999 and 7 May 2003. We report on our observations and analysis of a black-drop effect at the 1999 and 2003 transits of Mercury seen in high spatial resolution optical imaging with NASA’s Transition Region and Coronal Explorer (TRACE) spacecraft. We have separated the primary contributors to this effect, solar limb darkening and broadening due to the instrumental point spread function, for the 1999 event. The observations are important for understanding historical observations of transits of Venus, which in the 18th and 19th centuries were basic for the determination of the scale of the solar system. Our observations are in preparation for the 8 June 2004 transit of Venus, the first to occur since 1882. Only five transits of Venus have ever been seen – in 1639, 1761, 1769, 1874, and 1882. These events occur in pairs, whose members are separated by 8 years, with an interval between pairs of 105 or 122 years. Nobody alive has ever seen a transit of Venus.
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Hrudková, Marie, Ian Skillen, Chris Benn, Don Pollacco, Neale Gibson, Yogesh Joshi, Petr Harmanec, and Simon Tulloch. "Searching for transit timing variations in transiting exoplanet systems." Proceedings of the International Astronomical Union 4, S253 (May 2008): 446–49. http://dx.doi.org/10.1017/s1743921308026896.

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AbstractSearching for transit timing variations in the known transiting exoplanet systems can reveal the presence of other bodies in the system. Here we report such searches for two transiting exoplanet systems, TrES-1 and WASP-2. Their new transits were observed with the 4.2m William Herschel Telescope located on La Palma, Spain. In a continuing programme, three consecutive transits were observed for TrES-1, and one for WASP-2 during September 2007. We used the Markov Chain Monte Carlo simulations to derive transit times and their uncertainties. The resulting transit times are consistent with the most recent ephemerides and no conclusive proof of additional bodies in either system was found.
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Dvash, Elad, Yam Peleg, Shay Zucker, and Raja Giryes. "Shallow Transits—Deep Learning. II. Identify Individual Exoplanetary Transits in Red Noise using Deep Learning." Astronomical Journal 163, no. 5 (April 27, 2022): 237. http://dx.doi.org/10.3847/1538-3881/ac5ea2.

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Abstract In a previous paper, we introduced a deep learning neural network that should be able to detect the existence of very shallow periodic planetary transits in the presence of red noise. The network in that feasibility study would not provide any further details about the detected transits. The current paper completes this missing part. We present a neural network that tags samples that were obtained during transits. This is essentially similar to the task of identifying the semantic context of each pixel in an image—an important task in computer vision, called “semantic segmentation,” which is often performed by deep neural networks. The neural network we present makes use of novel deep learning concepts such as U-Nets, Generative Adversarial Networks, and adversarial loss. The resulting segmentation should allow further studies of the light curves that are tagged as containing transits. This approach toward the detection and study of very shallow transits is bound to play a significant role in future space-based transit surveys such as PLATO, which are specifically aimed to detect those extremely difficult cases of long-period shallow transits. Our segmentation network also adds to the growing toolbox of deep learning approaches that are being increasingly used in the study of exoplanets; but, so far mainly for vetting transits, rather than their initial detection.
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Dissertations / Theses on the topic "Transits"

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Aigrain, Suzanne. "Planetary transits and stellar variability." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614684.

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Ratcliff, Jessica. "The transits of Venus in Victorian Britain." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439310.

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Kipping, D. M. "The transits of extrasolar planets with moons." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1306758/.

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The search for extrasolar planets is strongly motivated by the goal of characterizing how frequent habitable worlds and life may be within the Galaxy. Whilst much effort has been spent on searching for Earth-like planets, large moons may also be common, temperate abodes for life as well. The methods to detect extrasolar moons, or “exomoons” are more subtle than their planetary counterparts and in this thesis I aim to provide a method to find such bodies in transiting systems, which offer the greatest potential for detection. Before one can search for the tiny perturbations to the planetary signal, an understanding of the planetary transit must be established. Therefore, in Chapters 3 to 5 I discuss the transit model and provide several new insights. Chapter 4 presents new analytic expressions for the times of transit minima and the transit duration, which will be critical in the later search for exomoons. Chapter 5 discusses two sources of distortion to the transit signal, namely blending (with a focus on the previously unconsidered self-blending scenario) and light curve smearing due to long integration times. I provide methods to compensate for both of these effects, thus permitting for the accurate modelling of the planetary transit light curve. In Chapter 6, I discuss methods to detect exomoons through their gravitational influence on the host planet, giving rise to transit timing and duration variations (TTV and TDV). The previously known TTV effect is updated with a new model and the associated critical problems are outlined. I then predict a new effect, TDV, which solves these problems, making exomoon detection viable. Chapter 7 presents a feasibility study for detecting habitable-zone exomoons with Kepler, where it is found that moons down to 0.2M⊕ are detectable. Finally, conclusions and future work are discussed in Chapter 8.
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Liu, Wai-man Raymond, and 廖蔚文. "Competition policy and strategies in the public transits: a case study of Hong Kong's mass transit system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29957941.

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Steffen, Jason. "Detecting new planets in transiting systems /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/9686.

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Myers, Stephen David. "The physiological effects of transits in high speed marine craft." Thesis, University of Chichester, 2008. http://eprints.chi.ac.uk/825/.

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The maritime environment is one of the harshest and most dangerous in which to work, particularly for professional users (e.g. military and rescue services). The aims of this research were to: a) investigate the effects of marine transits conducted in high speed craft (HSC) on the subsequent physical performance of military passengers, b) assess mitigation techniques to limit any degradation in human physical performance.
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Street, Rachel. "A search for extra-solar planetary transits in the field of open cluster NGC 6819." Thesis, University of St Andrews, 2002. http://hdl.handle.net/10023/12939.

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The technique of searching for extra-solar planetary transits is investigated. This technique, which relies on detecting the brief, shallow eclipses caused by planets passing across the line of sight to the primary star, requires high-precision time-series photometry of large numbers of stars in order to detect these statistically rare events. Observations of ~ 18000 stars in the field including the intermediate-age open cluster NGC 6819 are presented. This target field contrasts with the stellar environment surveyed by the radial velocity technique, which concentrates on the Solar neighbourhood. I present the data-reduction techniques used to obtain high-precision photometry in a semi-automated fashion for tens of thousands of stars at a time, together with an algorithm designed to search the resulting lightcurves for the transit signatures of hot Jupiter type planets. I describe simulations designed to test the detection efficiency of this algorithm and, for comparison, predict the number of transits expected from this data, assuming that hot Jupiter planets similar to HD 209458 are as common in the field of NGC 6819 as they are in the Solar neighbourhood. While no planetary transits have yet been identified, the detection of several very low amplitude eclipses by stellar companions demonstrates the effectiveness of the method. This study also indicates that stellar activity and particularly blending are significant causes of false detections. A useful additional consequence of studying this time-series photometry is the census it provides of some of the variable stars in the field. I report on the discovery of a variety of newly-discovered variables, including Algol-type detached eclipsing binaries which are likely to consist of M-dwarf stars. Further study of these stars is strongly recommended in order to help constrain models of stellar structure at the very low mass end. I conclude with a summary of this work in the context of other efforts being made in this field and recommend promising avenues of further study.
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Voss, Holger. "Developing a ground-based search system for transits of extrasolar planets." [S.l.] : [s.n.], 2006. http://opus.kobv.de/tuberlin/volltexte/2006/1354/index.html.

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Fressin, François. "Détection et caractérisation d'exoplanètes par photométrie des transits, spectropolarimétrie et coronographie." Paris 7, 2007. http://www.theses.fr/2007PA077210.

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En mesurant la vitesse radiale de l'étoile 51-Peg en 1995, Michel Mayor et Didier Queloz ont identifié pour la première fois une planète en dehors du système solaire, ou exoplanète. Depuis 12 ans, un formidable élan a amené le décompte des découvertes au-delà de 240. C'est désormais la caractérisation (rayon, densité, composition atmosphérique) qui est possible et qui motive cette thèse théorique et instrumentale. La recherche et l'étude des planètes en transit devant leur étoile revêtant une importance particulière, je présente tout d'abord dans cette thèse un simulateur de programmes de recherche de transits, destiné à la prédiction puis à l'interprétation scientifique de leurs résultats. Ce simulateur est utilisé en particulier pour prédire les événements attendus par la mission CoRoT en termes de planètes détectables et de "faux" transits. Les projets futurs de photométrie de planètes en transit devront permettre le suivi de planètes plus petites, ou la détection d'un très grand nombre d'objets. Une alternative à l'espace pour la photométrie des transits pourrait être dans ce cadre le site du Dôme C, en Antarctique. Je fais l'état du développement du projet A STEP, que j'ai proposé au cours de ma thèse, visant à caractériser la précision photométrique que l'on peut atteindre au Dôme C dès la nuit australe 2008. D'autres techniques de détection et de caractérisation d'exoplanètes sont complémentaires des transits. Je présente une méthode spectropolarimétrique pour détecter la lumière diffusée par l'atmosphère des exoplanètes, susceptible de caractériser leur albédo en lumière visible et leur taux de polarisation, indicatifs de leur composition atmosphérique. J'expose ensuite le concept du coronographe CIAXE : achromatique par nature, il conserve ses performances sur une large bande spectrale et pourrait être mis en place sur les projets futurs de détection d'exoplanètes. La méthode des transits nous permet progressivement de comprendre la formation et l'évolution des planètes. D'autres techniques sont nécessaires pour détecter des planètes à longue période correspondant aux critères - terriens - d"habitabilité". Nous pourrons ainsi déterminer si le système solaire, et plus encore la Terre, sont des cas communs, rares, ou même uniques dans la Galaxie
By measuring the radial velocity of the star 51-Peg in 1995. Michel Mayor and Didier Queloz identified for the first time a planet outside of the solar System, or exoplanet. The last 12 years have seen the discovery of over 240 exoplanets. The characterization of these planets (radius, density. Atmospheric composition) is now possible and motivates this theoretical and instrumental thesis. Because the search for planets in transit in front of their star and their study is of particular importance. I first present a Simulator of transit search missions, dedicated to the prediction and to the scientific interpretation of their results. This Simulator is in particular used to predict the yield of CoRoT mission in terms of detectable planets and "false" transits. Future photometric projects aimed at transiting planets will have to allow a follow-up of smaller planets. Or the detection of a very large number of planets. An alternative to space for transit photometry could then be the Dome C site, in Antarctica. I present the A STEP project. Its status and perspectives. A STEP will quantify the photometric accuracy at the Dome C site beginning in the Antarctic winter 2008. Other detection techniques are complementary to transits. I present a spetropolarimetric method to detect the light scattered by the atmosphere of exoplanets. In order to characterize their visible albedo and their polarization ratio, indicators of their atmospheric compositions. I then describe the CIAXE coronagraph : achromatic by nature, it keeps its performances on a large spectral band and could be inserted in future exoplanet detections projects. Transit method allows us to understand planetary formation and evolution, but other techniques are necessary to detect planets at longer periods that could harbour life. Considering earth-known criteria. We will then be able to determine if the Solar System, and furthermore the Earth. Are cornmon. Rare, or even unique in the Galaxy
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Thauront, Florence. "Les transits sédimentaires subtidaux dans les passes internes du bassin d'Arcachon." Bordeaux 1, 1994. http://www.theses.fr/1994BOR10668.

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Le transit sedimentaire dans les passes internes du bassin d'arcachon a ete etudie par le biais des dunes tidales. Cinq campagnes de geophysique ont permis de cartographier la repartition et la polarite des dunes a long terme. L'interpretation des donnees montre que la repartition des dunes suit une evolution saisonniere. En periode estivale, les formes a polarite de jusant sont dominantes. Le bassin se trouve dans une situation de deficit sedimentaire. La semelle caillouteuse, sur laquelle evoluent les dunes tidales, affleure en de nombreux points. A l'inverse, en periode hivernale, les dunes de flot sont majoritaires. La semelle caillouteuse est largement recouverte par le sable qui penetre dans le bassin sous l'action combinee des forts vents de secteur nord-ouest a sud-est et des vives-eaux. Les dunes, situees dans les zones d'inversion du transit sedimentaire residuel, peuvent changer de polarite sur une periode de quelques semaines, du moins superficiellement. Une etude detaillee d'un corps sedimentaire a ete menee afin de mieux cerner les mecanismes de progradation des dunes. Les dunes se deplaceraient de 16 a 248 metres par an. Leur deplacement represente un transit de sable au niveau de la dune de 1,7 a 13,9 tonnes/jour/metre lineaire. Les taux de migration observes (sur un cycle mortes-eaux vives-eaux) compares aux taux predits (a partir des mesures de courant) donnent des resultats assez concordants
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Books on the topic "Transits"

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Meeus, Jean. Transits. Richmond, Va: Willmann-Bell, 1989.

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Alexander, George. Robert Owen: Transits. Wagga Wagga (N.S.W.): Wagga Wagga City Art Gallery and Robert Owen, 1988.

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Bührer, Michel. Transits: L'Europe des réfugiés. Paris: Syros, 1993.

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1980-, Forsythe Jaime, ed. Transits: Stories from in-between. Halifax: Invisible Pub., 2007.

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Rubinsky, Holley. Rapid transits and other stories. Winlaw, B.C: Polestar Press, 1990.

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Smith, James L. The Passenger: Medieval Texts and Transits. Earth, Milky Way: punctum books, 2017.

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Kipping, David M. The Transits of Extrasolar Planets with Moons. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22269-6.

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service), SpringerLink (Online, ed. The Transits of Extrasolar Planets with Moons. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2011.

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Shirley, Lim, ed. Transnational Asian American literature: Sites and transits. Philadelphia, PA: Temple University Press, 2005.

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Cottam, Stella, and Wayne Orchiston. Eclipses, Transits, and Comets of the Nineteenth Century. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-08341-4.

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Book chapters on the topic "Transits"

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Rix, Erika, Kim Hay, Sally Russell, and Richard Handy. "Transits." In The Patrick Moore Practical Astronomy Series, 283–314. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4939-2901-6_8.

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Buick, Tony, and Philip Pugh. "Transits." In Patrick Moore's Practical Astronomy Series, 279–90. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-5828-0_12.

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Keene, John R. "Transits." In Ancestral House, 292–99. New York: Routledge, 2021. http://dx.doi.org/10.4324/9780429039348-36.

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Maunder, Michael, and Patrick Moore. "Future Transits." In Transit When Planets Cross the Sun, 95–109. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0373-8_12.

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Maunder, Michael, and Patrick Moore. "Observing Transits." In Transit When Planets Cross the Sun, 135–46. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0373-8_16.

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Maunder, Michael, and Patrick Moore. "Photographing Transits." In Transit When Planets Cross the Sun, 147–54. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0373-8_17.

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Westfall, John, and William Sheehan. "Future Transits." In Celestial Shadows, 487–506. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-1535-4_19.

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Maunder, Michael, and Patrick Moore. "Transits of Mercury." In Transit When Planets Cross the Sun, 23–27. London: Springer London, 2000. http://dx.doi.org/10.1007/978-1-4471-0373-8_4.

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Cameron, Andrew Collier. "Extrasolar Planetary Transits." In Methods of Detecting Exoplanets, 89–131. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27458-4_2.

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Wilkinson, John. "Eclipses and Transits." In Astronomers' Universe, 105–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-22839-1_5.

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Conference papers on the topic "Transits"

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Püsküllü, Çağlar, and Faruk Soydugan. "Analyses of some exoplanets’ transits and transit timing variations." In TURKISH PHYSICAL SOCIETY 32ND INTERNATIONAL PHYSICS CONGRESS (TPS32). Author(s), 2017. http://dx.doi.org/10.1063/1.4976453.

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Narita, Norio, Tomonori Usuda, Motohide Tamura, and Miki Ishii. "Gifts from Exoplanetary Transits." In EXOPLANETS AND DISKS: THEIR FORMATION AND DIVERSITY: Proceedings of the International Conference. AIP, 2009. http://dx.doi.org/10.1063/1.3215843.

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Dumitrescu, Alexandru, Doru Marian Suran, Stefan Sorescu-Surdu, Vasile Mioc, Cristiana Dumitrache, and Nedelia A. Popescu. "Exoplanet transits: orbit and size estimations." In EXPLORING THE SOLAR SYSTEM AND THE UNIVERSE. AIP, 2008. http://dx.doi.org/10.1063/1.2993687.

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Ford, H. C., W. Bhatti, L. Hebb, L. Petro, M. Richmond, J. Rogers, and Coryn A. L. Bailer-Jones. "Detecting Transits in Sparsely Sampled Surveys." In CLASSIFICATION AND DISCOVERY IN LARGE ASTRONOMICAL SURVEYS: Proceedings of the International Conference: “Classification and Discovery in Large Astronomical Surveys”. AIP, 2008. http://dx.doi.org/10.1063/1.3059062.

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Mo, Dong-Ming, Li Zhang, Deng-Fang Ruan, and You-Rong Li. "Thermocapillary Flow of a Moderate-Prandtl Number Fluid in Annular Pools With a Heat Inner Cylinder." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-68924.

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Abstract In this paper, a set of direct numerical simulations on the thermocapillary flow of 2cSt silicone oil with Prandtl number of 28.01 in annular pools heated from inner cylinder were carried out. The critical Marangoni number of flow destabilization was determined, and the flow pattern evolution with Marangoni number was revealed when the aspect ratios of the annular pools were 0.375 and 0.75. It was found that the axisymmetric steady flow will transit into different types of oscillatory flows. The critical Marangoni number of flow destabilization depends on types of flow instability. At a small aspect ratio, the flow transits to the oscillatory concentric ring pattern firstly, then into the combination of the oscillatory concentric ring pattern and azimuthal non-uniform temperature fluctuation, and eventually into rotating wave, while it transits directly into the rotating wave at a large aspect ratio. With the increase of Marangoni number, the oscillation frequency of the oscillatory flow increases, and the wave number is almost unchanged. However, when the oscillatory flow pattern transition happens, there is always an abrupt drop of the oscillation frequency.
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Dankanich, John, Bob Vondra, and Andrew Ilin. "Fast Transits to Mars Using Electric Propulsion." In 46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-6771.

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Dankanich, John, Laura Burke, John A. Carr, Geoff Landis, Timothy J. Peshek, Zackary C. Zoloty, and Robert C. O’Brien. "Transformational Propulsion for Fast In-Space Transits." In AIAA SCITECH 2024 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2024. http://dx.doi.org/10.2514/6.2024-1808.

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Kopp, Greg. "Liquid crystal intensity modulator for simulating planetary transits." In Optical Science and Technology, SPIE's 48th Annual Meeting, edited by Daniel R. Coulter. SPIE, 2003. http://dx.doi.org/10.1117/12.504521.

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Deng, Zhixiang, Pengzi Chu, Yi Yu, Hui Lin, Xi Jiang, and Danyang Dong. "A Survey on Operating Scenarios of Rail Transits." In ICMSS 2021: 2021 the 5the International Conference on Management Engineering, Software Engineering and Service Sciences. New York, NY, USA: ACM, 2021. http://dx.doi.org/10.1145/3459012.3459036.

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Pintr, Pavel, David Vápenka, and Zdeněk Rail. "Photometry of exoplanet transits and their regular monitoring." In Optics and Measurement 2019 International Conference, edited by Jana Kovačičinová. SPIE, 2019. http://dx.doi.org/10.1117/12.2543153.

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Reports on the topic "Transits"

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Kress, Marin. Automatic Identification System (AIS) data case study : vessel traffic through the Yaquina Bay breakwater at Newport, Oregon. Engineer Research and Development Center (U.S.), March 2023. http://dx.doi.org/10.21079/11681/46549.

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The navigation staff at US Army Corps of Engineers (USACE) Portland District (NWP) asked for information on vessel transits through the two existing openings in the breakwater on the north side of Yaquina Bay in Newport, Oregon. Currently, no authorized federal channel passes through the breakwater openings; however, the design for a possible federal channel is under consideration. NWP staff were interested in historical vessel transits, with a special focus on isolating transits for the largest (i.e., longest) vessels, identified as vessels 80 feet or longer, currently utilizing the area inside the breakwater. The Automatic Identification System Analysis Package (AISAP) software created by USACE-ERDC (2018) was used to analyze vessel traffic.
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Kress, Marin, Patricia DiJoseph, Morgan Johnston, Brian Tetreault, James Kilroy, Brady Towne, Andrew Smith, David Sathiaraj, and Andy Van Pelt. A method for evaluating Automatic Identification System (AIS) coverage on select inland waterways in 2020 and 2021 : Upper Mississippi River, Illinois River, and Ohio River. Engineer Research and Development Center (U.S.), November 2023. http://dx.doi.org/10.21079/11681/47839.

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The Automatic Identification System (AIS) shares vessel position information for navigational safety purposes. AIS broadcasts are received by other ships and terrestrial stations; however, in some areas there is no, or low, terrestrial station coverage to receive broadcasts. The US Army Corps of Engineers (USACE) developed an Online Travel Time Atlas (OTTA) to process AIS data and derive a transit count. This study examined OTTA output from 2020 and 2021 to identify areas of high or low AIS coverage along the Upper Mississippi, Illinois, and Ohio Rivers. Segments with a yearly average of two or more transit per day were classified as high coverage, those with less than a yearly average of two transits per day were classified as low coverage. Rivers were segmented using the USACE National Channel Framework reach boundaries. Results based on calculated vessel transits were as follows: Upper Mississippi River: 837.4 miles (98%) had high coverage, with 17.4 miles (2%) of low coverage; Illinois River: 190.5 miles (59%) had high AIS coverage, and 133 miles (41%) had low AIS coverage; Ohio River: 644 miles (66%) had high coverage, and 337 miles (34%) had low coverage. AIS coverage could be improved by raising antennae heights, installing repeater equipment, or adding towers.
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Greinert, Jens. Mine Monitoring in the German Baltic Sea 2020; Dumped munition monitoring AL548, 03rd – 16th November 2020, Kiel (Germany) – Kiel (Germany) „MineMoni-II 2020“. GEOMAR Helmholtz Centre for Ocean Research Kiel, 2021. http://dx.doi.org/10.3289/cr_al548.

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ALKOR cruise AL548 took place as part of the EMFF (European Maritime and Fisheries Fund)-funded project BASTA (Boost Applied munition detection through Smart data inTegration and AI workflows; https://www.basta-munition.eu) and as continuation of the munition monitoring started within the BMBF-funded project UDEMM (Environmental Monitoring for the Delaboration of Munition in the Sea; https://udemm.geomar.de/). In October 2018, a first cruise (POS530 MineMoni2018) was conducted, to gather data for a broad baseline study in the German Baltic Sea. Results show a moderate contamination level on regional and coastal scale, but indicate higher levels for specific local areas. Within UDEMM, expertise was developed to detect, exactly locate and monitor munition (e.g. torpedoes, sea mines, ground mines) on the seafloor using optical and hydroacoustic means. In addition, chemical analyses of dissolved contaminants in the water and sediments was performed. Data acquired during this cruise are used in BASTA, which aims for enhanced munition detection via AUV-based artificial intelligence applied on multi-sensor datasets. At the same time, the project ExPloTect (Ex-situ, near-real-time exPlosive compound deTection in seawater) (also EMFF-funded) addresses the need for an innovative approach to detect explosive compounds in seawater. A prototype system was used and successfully tested for the first time during this cruise. The main focus was placed onto the two already known dumpsites Kolberger Heide and Lübeck Bight. Additionally, new areas Falshöft (Schleswig-Holstein) and Cadet Channel, Trollegrund and Großklützhöved (Mecklenburg-Vorpommern) were explored. In each area high-resolution multibeam mapping was performed and contact lists, indicating potential munition objects were produced on board. AUV surveys were conducted to ground-truth possible contacts via detailed photograph and magnetometer mapping. This was complemented with towed video (TV)-CTD profiles. The transits to and between those sites were planned along former constraint routes during WWII. These routes were main targets of the British Air Force and mines and bombs can be expected along these ways. During transits water samples were taken with on a CTD- (conductivity, temperature, depth) rosette-mounted Niskin bottles in regular distances, in order to obtain a comprehensive understanding munition compounds (inter alia trinitrotoluene (TNT)) measurements across the German Baltic Sea.
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Carballo, Jerónimo, Georg Schaur, Alejandro Graziano, and Christian Volpe Martincus. Transit Trade. Inter-American Development Bank, June 2016. http://dx.doi.org/10.18235/0000488.

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Graziano, Alejandro, Georg Schaur, Christian Volpe Martincus, and Jerónimo Carballo. Transit Trade. Inter-American Development Bank, June 2016. http://dx.doi.org/10.18235/0011742.

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In this paper, we estimate the effects of transit systems that substantiallystreamline administrative processing of trade flows. In so doing, we use a unique dataset that consists of the entire universe of El Salvador's export transactions over the period 2007-2013 and includes information on the transactions channeled under a new transit regime established with neighboring countries over the same period. Results suggest that this new transit system has been associated with decreased order servicing and variable trade costs. As a consequence, firms' exports increased primarily through higher shipping frequencies. Furthermore, the effects have been strong on foreign sales of time-sensitive goods. This evidence informs one of the main policies covered in the 2013 WTO Agreement of Trade Facilitation.
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Chandler, K., and L. Eudy. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Preliminary Evaluation Results. Office of Scientific and Technical Information (OSTI), March 2007. http://dx.doi.org/10.2172/901251.

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Cleland, Francis. 1999 Transit Customer Satisfaction Index for Florida Transit Properties. Tampa, FL: University of South Florida, October 2000. http://dx.doi.org/10.5038/cutr-nctr-rr-2000-06.

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Chandler, K., and L. Eudy. Alameda-Contra Costa Transit District (AC Transit) Fuel Cell Transit Buses: Third Evaluation Report and Appendices. Office of Scientific and Technical Information (OSTI), July 2008. http://dx.doi.org/10.2172/935894.

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McConville, Angela, Benjamin Kober, Cindy Lane, and Joel Donham. Transit-Oriented Development. University of Iowa, 2009. http://dx.doi.org/10.17077/9w9h-klxb.

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Chandler, K., and L. Eudy. SunLine Transit Agency, Hydrogen Powered Transit Buses: Preliminary Evaluation Results. US: National Renewable Energy Laboratory (NREL), Golden, CO., February 2007. http://dx.doi.org/10.2172/899297.

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