Download or read book Precision Photometry written by David Kilkenny and published by . This book was released on 1993 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Precision Photometry written by A. G. Davis Philip and published by . This book was released on 1991 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stellar Photometry Current Techniques and Future Developments written by C. J. Butler and published by Cambridge University Press. This book was released on 1993-08-12 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stellar photometry from space, automatic photometric telescopes, and CCD photometers, these are just some of the exciting areas of current interest and future developments in stellar photometry covered in this timely review. Articles from international experts - drawn together at the IAU Colloquium 136, in Dublin, 1992 - are gathered here to cover all aspects of this fundamental technique. In this survey, professionals discuss state-of-the-art and future technology including photometry with millimagnitude accuracy, multichannel arrays used in the optical and IR, a global network of automatic photometric telescopes, time-series photometry of faint sources using CCDs, and photometry from space. These articles provide an up-to-date account of all aspects of photometry and a guide to future developments - an essential survey for professionals involved in the design and use of such instruments.

Download or read book Exploring the Architecture of Transiting Exoplanetary Systems with High Precision Photometry written by Kento Masuda and published by Springer. This book was released on 2018-03-06 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis develops and establishes several methods to determine the detailed geometric architecture of transiting exoplanetary systems (planets orbiting around, and periodically passing in front of, stars other than the sun) using high-precision photometric data collected by the Kepler space telescope. It highlights the measurement of stellar obliquity – the tilt of the stellar equator with respect to the planetary orbital plane(s) – and presents methods for more precise obliquity measurements in individual systems of particular interest, as well as for measurements in systems that have been out of reach of previous methods. Such information is useful for investigating the dynamical evolution of the planetary orbit, which is the key to understanding the diverse architecture of exoplanetary systems. The thesis also demonstrates a wide range of unique applications of high-precision photometric data, which expand the capability of future space-based photometry.

Download or read book Astronomical Photometry written by Eugene F. Milone and published by Springer Science & Business Media. This book was released on 2011-04-06 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will bring together experts in the field of astronomical photometry to discuss how their subfields provide the precision and accuracy in astronomical energy flux measurements that are needed to permit tests of astrophysical theories. Differential photometers and photometry, improvements in infrared precision, the improvements in precision and accuracy of CCD photometry, the absolute calibration of flux, the development of the Johnson UBVRI photometric system and other passband systems to measure and precisely classify specific types of stars and astrophysical quantities, and the current capabilities of spectrophotometry, and polarimetry to provide precise and accurate data, will all be discussed in this volume. The discussion of `differential’ or `two-star’ photometers will include those developed for planetary as well as stellar photometry and will range from the Princeton polarizing photometer through the pioneering work of Walraven to the differential photometers designed to measure the ashen light of Venus and to counter the effects of aurorae at high latitude sites; the last to be discussed will be the Rapid Alternate Detection System (RADS) developed at the University of Calgary in the 1980s.

Download or read book Introduction to Astronomical Photometry written by M. Golay and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The material given in this 'Introduction to astronomical photometry' is the subject matter of a lecture at the University of Geneva. It is, therefore, intended for those students, physicists or mathematicians, who have completed their bachelor's degree or diploma, and are intending to work for their Ph.D. in astronomy. We assume then the elementary ideas of astrophysics, magnitude, colour index, spectral classes, luminosity classes, gradient, atmospheric extinction are already known. The student may find it useful to re-read the work of Schatzman [1], Dufay [2] and Aller [254] before embarking upon the study of this 'Introduction to astronomical photometry'. It is not our aim in this book to deal with every aspect of stellar photometry. On the contrary, we shall restriet ourselves to looking at subjects ofwhich knowledge seems to us essential for someone who has to use photometrie quantities in his astronomical research. We are, therefore, keeping the interests of the photometrie measurements user partieularly in mind. We shall only discuss very superficially the technical prob lems and reduction methods for atmospheric extinction. These problems are dealt with very clearly in Astronomical Techniques [3]; the first by A. Lallemand, H. L.

Download or read book An Introduction to Astronomical Photometry Using CCDs written by W. Romanishin and published by Createspace Independent Pub. This book was released on 2014-08-08 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Introduction to Astronomical Photometry Using CCDsBy W. Romanishin

Download or read book Photometry written by John William Tudor Walsh and published by . This book was released on 1926 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Extreme Precision Photometry and Radial Velocimetry from the Ground written by Gudmundur Stefansson and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of the first exoplanets in the early 1990s we have seen explosive growth in the field of exoplanetary science, hand-in-hand with technological improvements. We now know of over 4,000 exoplanets, most of which have been detected with two detection techniques: the transit method, and the Doppler Radial Velocity (RV) method. In this thesis, I discuss our efforts to further improve on these techniques to through the development of next-generation astronomical instrumentation.First, I discuss a path to obtain hitherto unachievable differential photometric precisions from the ground using custom-fabricated Engineered Diffusers. Such diffusers mold the focal plane image of a star into a broad and stable top-hat shape, minimizing photometric errors due to non-uniform pixel response, atmospheric seeing effects, imperfect guiding, and telescope-induced variable aberrations seen in defocusing. This reshaping significantly increases the achievable dynamic range of our observations, increasing our observing efficiency and thus better averages over scintillation. In using this technique we have demonstrated 62ppm precision in 30 minute bins on the bright star 16 Cyg A using the Engineered Diffuser we installed on the 3.5m ARC Telescope at Apache Point Observatorywithin a factor of two of Kepler's photometric precision on the same star. We discuss our precision diffuser-assisted follow-up observations of nearby transiting exoplanets, allowing us to better characterize their orbital parameters. This technology is inexpensive, scalable, easily adaptable, and is already being used at a number of different observatories for precision ground-based photometric follow-up of transiting planets.Second, I discuss the design and development of two next-generation radial velocity spectrographs: the Habitable-zone Planet Finder (HPF), a near-infrared (NIR) high-resolution stabilized Doppler spectrograph we recently installed at the 10m Hobby-Eberly Telescope at McDonald Observatory in Texas, and NEID, a precision red-optical high-resolution stabilized Doppler Spectrograph to be installed on the 3.5m WIYN Telescope at Kitt Peak National Observatory in Arizona in late 2019. In particular, I discuss the design and performance of the HPF and NEID environmental control systems, which have demonstrated sub-milli-Kelvin temperature stability and ~1microTorr pressure stability long-term, both of which are essential for precision RVs. Further, I discuss the commissioning and early HPF on-sky RV precision demonstrations. In particular, I discuss our RV extractions demonstrating 1.53 m/s RV precision over months on the nearby-bright M4.5-dwarf Barnard's Star, marking some of the highest RV precisions achieved in the NIR to date.Additionally, I discuss two recent projects that combine these two technologies to demonstrate their scientific utility on-sky.I discuss the validation of a 2 Earth radii sub-Neptune-sized planet around the nearby high proper motion M2.5 dwarf G 9-40, using high-precision NIR RV observations with HPF, precision diffuser-assisted ground-based photometry with a custom narrow-band photometric filter on the ARCTIC imager at APO, and adaptive optics imaging using the ShaneAO system at the 3m Shane Telescope at Lick Observatory. At a distance of 27.9pc, G 9-40b is currently the second closest transiting planet discovered by the K2 mission to date, and amongst top small M-dwarf planet candidates for transmission spectroscopy with JWST in the future. We also discuss our implementation of an empirical spectral matching algorithm using high-resolution NIR HPF spectra, which we use to estimate spectroscopic stellar parameters of the host star, which can easily be used to estimate stellar parameters of other M-dwarf stars observed with HPF.Additionally, I discuss the full 3D orbital solution of the Neptune-sized M-dwarf planet K2-25b orbiting its M4.5 dwarf star in the 650-800Myr old Hyades cluster. Through jointly fitting the available K2 data, precision ground-based diffuser-assisted transits from ARCTIC at APO and the Half-Degree Imager (HDI) on the 0.9m Telescope at Kitt Peak, and precision NIR RVs from HPF, we provide the first mass constraint of K2-25b with a mass of M~50 Earth masses. Further, in three transits we detect the Rossiter-McLaughlin effect of K2-25b, with a sky-projected obliquity of ~3 degrees (consistent with 0 degrees), and true 3D obliquity of ~9 degrees (consistent with 0 at 2 sigma). These observations mark one of the first mass constraint of an exoplanet in a cluster, and the second obliquity measurement of an M-dwarf planetary system, giving us key insights into the formation and subsequent dynamical history of the system.

Download or read book Precision Measurement and Calibration written by and published by . This book was released on 1971 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Astronomical Photometry written by C. Sterken and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small and large telescopes are being installed all around the world. Astronomers have thus acquired better access to more modern equipment; not in the least to photometers, which are very important tools for the contemporary observer. This development of higher quality and more sensitive equipment makes it very necessary to improve the accuracy of the measurements. This guide helps the astronomer and astronomy student to improve the quality of their photometric measurements and to extract a maximum of information from their observations. The book is based on the authors' observing experience, spending numerious nights behind various instruments at many different observatories.

Download or read book Optical Payloads for Space Missions written by Shen-En Qian and published by John Wiley & Sons. This book was released on 2016-01-26 with total page 1001 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Payloads for Space Missions is a comprehensive collection of optical spacecraft payloads with contributions by leading international rocket-scientists and instrument builders. Covers various applications, including earth observation, communications, navigation, weather, and science satellites and deep space exploration Each chapter covers one or more specific optical payload Contains a review chapter which provides readers with an overview on the background, current status, trends, and future prospects of the optical payloads Provides information on the principles of the optical spacecraft payloads, missions’ background, motivation and challenges, as well as the scientific returns, benefits and applications

Download or read book Transactions of the International Astronomical Union written by Jean-Pierre Swings and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: The XIXth General Assembly of the International Astronomical Union was held in New Delhi, India, from November 19 to 28, 1985. It was dedicated to the memory of a former IAU President, Professor M. K. V. Bappu, who tragically passed away on August 19, 1982. On the occasion of the Delhi General Assembly, the IAU Minor Planet Center announced that Minor Planet (asteroid) No. 2596 henceforth will carry the name Vainu Sappu. The full text of the announcement reads: "(2596) VAINU BAPPU = 1979 KN (diameter about 8 kilometers, period 5 years 4 months, mean distance from the Sun around 450 million kilometers) Discovered 1979, May 19, by R. M. West at the European Southern Observatory. Named in memory of Manali f

Download or read book Remote Observatories for Amateur Astronomers written by Gerald R. Hubbell and published by Springer. This book was released on 2015-10-23 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amateur astronomers who want to enhance their capabilities to contribute to science need look no farther than this guide to using remote observatories. The contributors cover how to build your own remote observatory as well as the existing infrastructure of commercial networks of remote observatories that are available to the amateur. They provide specific advice on which programs to use based on your project objectives and offer practical project suggestions. Remotely controlled observatories have many advantages—the most obvious that the observer does not have to be physically present to carry out observations. Such an observatory can also be used more fully because its time can be scheduled and usefully shared among several astronomers working on different observing projects. More and more professional-level observatories are open to use by amateurs in this way via the Internet, and more advanced amateur astronomers can even build their own remote observatories for sharing among members of a society or interest group. Endorsements: “Remote Observatories for Amateur Astronomers Using High-Powered Telescopes from Home, by Jerry Hubbell, Rich Williams, and Linda Billard, is a unique contribution centering on computer-controlled private observatories owned by amateur astronomers and commercialized professional–amateur observatories where observing time to collect data can be purchased. Before this book, trying to piece together all of the necessary elements and processes that make up a remotely operated observatory was daunting. The authors and contributors have provided, in this single publication, a wealth of information gained from years of experience that will save you considerable money and countless hours in trying to develop such an observatory. If you follow the methods and processes laid out in this book and choose to build your own remotely operated observatory or decide to become a regular user of one of the commercial networks, you will not only join an elite group of advanced astronomers who make regular submissions to science, but you will become a member of an ancient fraternity. Your high-technology observatory will contain a “high-powered telescope” no matter how large it is, and from the comfort of home, you can actively contribute to the work that started in pre-history to help uncover the secrets of the cosmos.” Scott Roberts Founder and President, Explore Scientific, LLC. “In the past three and a half decades, since I first became involved with remote observatories, the use of remote, unmanned telescopes at fully automated observatories has advanced from a very rare approach for making astronomical observations to an increasingly dominant mode for observation among both professional and amateur astronomers. I am very pleased to see this timely book being published on the topic. I highly recommend this book to readers because it not only covers the knowledge needed to become an informed user of existing remote observatories, but also describes what you need to know to develop your own remote observatory. It draws on more than two decades of remote observatory operation and networking by coauthor Rich Williams as he developed the Sierra Stars Observatory Network (SSON) into the world-class network it is today. This book is the ideal follow-on to coauthor Jerry Hubbell’s book Scientific Astrophotography (Springer 2012). Remote observatories have a bright future, opening up astronomy to a new and much larger generation of professional, amateur, and student observers. Machines and humans can and do work well together. I hope you enjoy reading this book as much as I have and will take advantage of the developments over the past several decades by the many pioneers of remote observatories.” Russ Genet, PhD. California Polytechnic State University Observing Saturn for the first time is a memory that stays with us for the rest of our lives, and for many it is the start of an odyssey--an odyssey into observational astronomy. Remote Observatories for Amateur Astronomers is a book written for observers, beginners, and old hands alike, providing detailed advice to those wishing to improve their observing skills. Many will want to build and operate a remotely controlled observatory, and for those, Part I of this book is an invaluable source of information. If, like me, you choose to avoid the capital outlay of owning your own facility, Part II describes how you can use one of the many professionally run large scopes where, for a few dollars, you can capture spectacular color images of nebulae, galaxies, and comets. My own scientific interest in short period eclipsing binaries has been made possible through the availability of remote telescopes such as those operated by the Sierra Stars Observatory Network (SSON). Whichever route you take, this book is essential reading for all who aspire to serious observing. David Pulley The Local Group (UK)

Download or read book High Time Resolution Astrophysics written by Don Phelan and published by Springer Science & Business Media. This book was released on 2007-10-23 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is quite simply the first volume of its kind dedicated to the area of high time resolution astrophysics. High time resolution astrophysics (HTRA) is an important new window on the universe and a vital tool in understanding a range of phenomena from diverse objects and radiative processes. Underlining this science foundation, technological developments in both instrumentation and detectors are described.

Download or read book The CoRoT Legacy Book written by CoRot Team and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is dedicated to all the people interested in the CoRoT mission and the beautiful data that were delivered during its six year duration. Either amateurs, professional, young or senior researchers, they will find treasures not only at the time of this publication but also in the future twenty or thirty years. It presents the data in their final version, explains how they have been obtained, how to handle them, describes the tools necessary to understand them, and where to find them. It also highlights the most striking first results obtained up to now. CoRoT has opened several unexpected directions of research and certainly new ones still to be discovered.

Download or read book Celestial Shadows written by John Westfall and published by Springer. This book was released on 2014-11-19 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of what is known about the universe came from the study of celestial shadows. This book looks in detail at the way eclipses and other celestial shadows have given us amazing insights into the nature of the objects in our solar system and how they are even helping us discover and analyze planets that orbit stars other than our Sun. A variety of eclipses, transits, and occultations of the mooons of Jupiter and Saturn, Pluto and its satellite Charon, asteroids and stars have helped astronomers to work out their dimensions, structures, and shapes - even the existence of atmospheres and structures of exoplanets. Long before Columbus set out to reach the Far East by sailing West, the curved shadow of the Earth on the Moon during a lunar eclipse revealed that we inhabit a round world, a globe. More recently, comparisons of the sunlit and Earthlit parts of the Moon have been used to determine changes in the Earth's brightness as a way of monitoring possible effects in cloud coverage which may be related to global warming. Shadows were used by the Greek mathematician Eratosthenes to work out the first estimate of the circumference of the Earth, by Galileo to measure the heights of the lunar mountains and by eighteenth century astronomers to determine the scale of the Solar System itself. Some of the rarest and most wonderful shadows of all are those cast onto Earth by the lovely "Evening Star" Venus as it goes between the Earth and the Sun. These majestic transits of Venus occur at most two in a century; after the 2012 transit, there is not a chance to observe this phenomenon until 2117, while the more common sweep of a total solar eclipse creates one of the most dramatic and awe-inspiring events of nature. Though it may have once been a source of consternation or dread, solar eclipses now lead thousands of amateur astronomers and "eclipse-chasers" to travel the globe in order to experience the dramatic view under "totality." These phenomena are among the most spectacular available to observers and are given their full due in Westfall and Sheehan's comprehensive study.