By Thomas R. Williams

ISBN-10: 0521519128

ISBN-13: 9780521519120

Based in 1911, the AAVSO boasts over 1200 participants and observers and is the world's biggest non-profit association devoted to variable famous person remark. This well timed publication marks the AAVSO's centennial yr, providing an authoritative and actual historical past of this crucial organization. Writing in an enticing and available kind, the authors stream chronologically via 5 eras of the AAVSO, discussing the evolution of its constitution and function. during the textual content, the main target is at the hundreds of thousands of people whose contributions have made the AAVSO's growth attainable. Describing a century of interplay among novice astronomers, the authors rejoice the collaborative relationships that experience existed through the years. because the definitive heritage of the 1st hundred years of the AAVSO, this article has vast allure and may be of curiosity to beginner astronomers, in addition to historians and sociologists of technology as a rule.

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Extra info for Advancing Variable Star Astronomy: The Centennial History of the American Association of Variable Star Observers

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The Hagen Atlas in 1908 comprised six series. Series I through III (1899–1900) have a limiting magnitude of 10 and hence are suitable for larger telescopes. Series I contains 45 variables having minima below the BD limit, Series II contains 46 variables within the BD limit, and Series III contains 37 naked-eye variables. Series IV (1907) contains 101 variables visible at minimum in moderate-sized telescopes and that are within the BD declination and magnitude limits. Series V (1906) shows 48 variables having a minimum brighter than seventh magnitude, suitable for nakedeye or small-instrument observing.

We shift our attention now to William Tyler Olcott, his life, and the founding of the AAVSO. Part II THE FOUNDING OF THE AAVSO – THE WILLIAM TYLER OLCOTT ERA 3 r The amateur’s amateur Norwich native whose family ties played a critical role for Tyler Olcott’s later independence. Though William Olcott was born in Utica, New York, in 1839, his family moved to Chicago when he was a child. His father left farming to seek employment in the fastest growing city on the western frontier. William Olcott received his early education in the Chicago schools.

Indeed, the ASV was the greatest improvement in charts for observers of variable stars since Friedrich W. A. Argelander’s Uranometria of 1843 and its expansion by Eduard Heis in 1872. The ASV was a series of charts with corresponding catalogs of sequences prepared by the Reverend Johann Georg Hagen, S. J. (1847–1930). 46 Hagen was a careful observer who grounded his work in a thorough understanding of the history of variable star astronomy. After his ordination in 1880, Hagen was sent from the Jesuit seminary in England to Prairie du Chien, Wisconsin, as a mathematics teacher.

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Advancing Variable Star Astronomy: The Centennial History of the American Association of Variable Star Observers by Thomas R. Williams

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