The DFBS Spectroscopic Database and the Armenian Virtual Observatory
The Digitized First Byurakan Survey (DFBS) is the digitized version of the famous Markarian Survey. It is the largest low-dispersion spectroscopic survey of the sky, covering 17,000 square degrees at galactic latitudes |b|>15. DFBS provides images and extracted spectra for all objects present in the FBS plates. Programs were developed to compute astrometric solution, extract spectra, and apply wavelength and photometric calibration for objects. A DFBS database and catalog has been assembled containing data for nearly 20,000,000 objects. A classification scheme for the DFBS spectra is being developed. The Armenian Virtual Observatory is based on the DFBS database and other large-area surveys and catalogue data.
Astronomical objects classification based on the Digitized First Byurakan Survey low-dispersion spectra
Abstract The Digitized First Byurakan Survey is the largest and the first systematic objective-prism survey of the extragalactic sky. The detection, extraction, and classification of about 40 million spectra of about 20 million astronomical objects available in the survey require distinguishing the pixels containing photons from the source and the noise pixels per object. This paper aims at developing a service to classify the spectra of UV-excess galaxies, quasars, compact galaxies, and other objects in the survey. Supervised and unsupervised convolutional neural network deep learning algorithms have been developed and studied.
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LIST OF ILLUSTRATIONS ix ACKNOWLEDGMENTS xi INTRODUCTION: Goethe Coins a Phrase 1 PART ONE: CIRCULATION Chapter 1: Gilgamesh's Quest 39 Chapter 2: The Pope's Blowgun 78 Chapter 3: From the Old World to the Whole World 110 PART TWO: TRANSLATION Chapter 4: Love in the Necropolis 147 Chapter 5: The Afterlife of Mechthild von Magdeburg 170 Chapter 6: Kafka Comes Home 187 PART THREE: PRODUCTION Chapter 7: English in the World 209 Chapter 8: Rigoberta Menchu in Print 231 Chapter 9: The Poisoned Book 260 CONCLUSION: World Enough and Time 281 BIBLIOGRAPHY 305 INDEX 319