Introduction to Astronomical Photometry
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
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Editorial Board J. E.
BLAMONT,
R. L. F.
Laboratoire d'Aeronomie, Verrü!res, France
BOYD,
University College, London, England
L. GOLD BERG, Kitt Peak NationalObservatory, Tucson, Ariz., U.S.A.
C. Z.
G. H.
LUDWIG,
J AGER, University of Utrecht, Holland
DE
KOPAL,
University of Manchester, Manchester, England
NOAA. National Environmental Satellite Service, Suitland, Md., U.S.A.
R. L ÜST, Institut fir
Extraterre~trisc"e f.hY~ik, ":
,~.; .~~ )~~
,. .. I~~
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;/"~:
Garching-München, Germany
•
B. M. M CCORMAC, Lockheed Polo Alto Research Laboratory, Palo Alto, Calif., U.S.A.
H. E. L. I.
Z.
SEDOV,
NEWELL,
NASA, Washington, D.C., U.S.A.
Academy of Science ofthe U.S.S.R:, Moscow, U.S.S.R.
SVESTKA,
Fraunhofer Institute, Freiburg im Breisgau, Germany
Secretary of the Editorial Board W.
DE GRAAFF,
Sterrewacht 'Sonnenborgh', University of Utrecht, Utrecht, Holland
VOLUME 41
INTRODUCTION TO ASTRONOMICAL PHOTOMETRY
M.GOLAY Geneva Observatory. Switzerland
INTRODUCTION TO ASTRONOMICAL PHOTOMETRY
D. REIDEL PUBLISHING COMPANY DORDRECHT-HOLLAND / BOSTON-U.S.A.
Library of Congress Catalog Card Number 73-91430 ISBN-13: 978-94-010-2171-5 e-ISBN-13: 978-94-010-2169-2 DOI: 10.1007/978-94-010-2169-2
Published by D. Reidel Publishing Company, P.O. Box 17, Dordreeht, Holland Sold and distributed in the U.S.A., Canada, and Mexieo by D. Reide1 Publishing Company, Ine. 306 Dartmouth Street, Boston, Mass. 02116, U.S.A.
All Rights Reserved Copyright © 1974 by D. Reidel Publishing Company, Dordreeht, Holland Softcover reprint ofthe hardcover 1st edition 1974 No part of this book may be reprodueed in any form, by print, photoprint, mierofilm, or any other means, without written permission from the publisher
TABLE OF CONTENTS
IX
PREFACE
CHAPTER
1.
GENERAL DEFINITIONS AND ENERGY DISTRIBUTION FOR VARIOUS SPECTRAL TYPES
1.1. Definition of Photometrie Measurement, A Special Case of Astronomiea1 Measurement 1.2. Deseription of the Energy Distribution in Stellar Speetra 1.3. Charaeteristie Physiea1 Parameters of the Continuous Energy Distribution (A) GRADIENT
1.4. Charaeteristie Parameters of the Energy Distribution (B) THE BALMER DISCONTINUITY AND ITS POSITION
1.5. The Importanee of Lines in Photometrie Measurement 1.6. Distribution of the Fraetion of Energy Absorbed in the Lines 1.7. The Importanee of Aeeuraey when Making Measurements in Astronomiea1 Photometry 1.8. Interstellar Absorption Law Dedueed from Speetrophotometry CHAPTER
2.
2.5. 2.6. 2.7. 2.8.
11 11
21 21 25 28 31 33
PHOTOMETRIC MEASUREMENTS, EFFECTS OF BANDWIDTHS AND INTERSTELLAR ABSORPTION
2.1. 2.2. 2.3. 2.4.
1 4
Charaeteristie Parameters of a Photometrie System Atmospherie Extinetion Correetion. Ro1e of the Bandwidth Effeet of Bandwidth on Correetions for Interstellar Extinetion Effeets of the Bandwidth and the Form of Extinetion Law on Ratios of the Type Eu! E y Effeets of Various Extinetion Laws and Bandwidths on Ratios of the Type Av/Ey Relationships between Heteroehromatie Magnitudes Obtained from Two Simi1ar Systems Re1ationsh
