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Imaging Sunlight Using a Digital Spectroheliograph

Ken M. Harrison (Autor)

Buch | Softcover

XVI, 278 Seiten

2016 | 1st ed. 2016
Springer International Publishing (Verlag)
978-3-319-24872-1 (ISBN)

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Ken M. Harrison's latest book is a complete guide for amateur astronomers who want to obtain detailed narrowband images of the Sun using a digital spectroheliograph (SHG). The SHG allows the safe imaging of the Sun without the expense of commercial 'etalon' solar filters. As the supporting software continues to be refined, the use of the digital spectroheliograph will become more and more mainstream and has the potential to replace the expensive solar filters currently in use. The early chapters briefly explain the concept of the SHG and how it can produce an image from the solar spectrum. A comparison of the currently available narrow band solar filters is followed by a detailed analysis of the critical design, construction and assembly features of the SHG. The design and optimum layout of the instrument is discussed to allow evaluation of performance. This information explains how to assemble a fully functional SHG using readily available components. The software required to process the images is explained and step by step examples provided, with various digital instruments around the world highlighted based on input from many experienced amateurs who have shared their experience in building and using their spectroheliographs. The final chapters provide a historical overview of the traditional spectroheliograph and the later spectrohelioscope, from the initial G.E.Hale and Deslandres concepts of the 1890's through to the later work by Veio and others. The construction and performance of various instruments is covered in detail, and provides a unique opportunity to record and appreciate the groundbreaking researches carried out by amateurs in the 20th century. This is an absolutely up to date book which fully addresses the watershed, game changing influence of the digital imaging revolution on the traditional spectroheliograph.

An experienced amateur astronomer, Ken Harrison was born in Scotland where he trained as a mechanical engineer. He has been designing and building telescopes since the early 1960’s and has built a series of spectroscopes for use on medium-sized amateur telescopes. He was Section Director of the Astronomical Society of Victoria, Australia Astrophotographic Section for ten years and past president of the Society. Ken’s university thesis (and his first publication) was Design and Construction of the Isaac Newton 98-inch Telescope (Strathclyde University, 1970); since then he has published articles on optical design including Blink Comparison, (BAA Journal Vol 87, p 94) and Method of Radially Supporting Large Mirrors (Vol 87, p 154). He has made many contributions to the Astronomical Society of Victoria newsletter and was for three years the Editor of the ‘N’Daba’ newsletter of the Natal Centre, Astronomical Society of Southern Africa. He is the author of "Astronomical Spectroscopy for Amateurs" (Springer, 2011) and "Grating Spectroscopes and How to Use Them" (Springer, 2012).

Introduction.- The Digital Spectrohelioscope.- The Sun's Spectrum.- Examples of Solar Imaging at Various Wavelengths.- How to Build Your Spectroheliograph (SHG).- Examples of Amateur Instruments and Their Results.- Processing Software.- Doppler and Other Effects.- Analyzing the Results.- Pre-Digital Solutions.- Future Developments.- Appendices.- Index.

"This book should be required reading for anyone thinking of embarking on the construction of one of these instruments, and the first half makes a good primer for anyone embarking on less-sophisticated solar observation." (Mike Rushton, The Observatory, Vol. 137 (1260), October, 2017)

"This book, which is definitely aimed at experienced astronomy buffs, provides an argument for an alternative way to select out colors-something that has become far more practical with the advent of digital cameras. ... There is a significant amount of theory and history presented, most of which can be followed by individuals familiar with calculus-based university physics. ... Summing Up: Recommended. Professionals and practitioners only." (D. J. Van Domelen, Choice, Vol. 54 (3), November, 2016)

Erscheinungsdatum	10.06.2016
Reihe/Serie	The Patrick Moore Practical Astronomy Series
Zusatzinfo	XVI, 278 p. 201 illus., 132 illus. in color.
Verlagsort	Cham
Sprache	englisch
Maße	155 x 235 mm
Themenwelt	Sachbuch/Ratgeber ► Natur / Technik ► Weltraum / Astronomie
	Naturwissenschaften ► Chemie ► Analytische Chemie
	Naturwissenschaften ► Physik / Astronomie ► Astronomie / Astrophysik
Schlagworte	Affordable spectrohelioscopes • Alternatives to etalon filters • Amateur astronomy of Sun • Amateur solar observations • Amateur spectrography • Astronomy, Observations and Techniques • Collimating spectrograph • DIY spectroheliography • Etalon filters • Imaging the Sun • Physics and Astronomy • Popular Science in Astronomy • Software for spectroheliography • Spectroscopy and Microscopy
ISBN-10	3-319-24872-3 / 3319248723
ISBN-13	978-3-319-24872-1 / 9783319248721
Zustand	Neuware