Volume 20 number 1 — 1991
Articles in This Issue
A Method of Creating AAVSO Observing Charts by Computer
Charles E. Scovil, Robert A. Leitner
Computer Image Processing Techniques for the Production of AAVSO Observing Charts
Gilbert Weingarten
Visual and Photoelectric Observations of DM Persei
David B. Williams
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Axel Thomas
Photoelectric Photometry of the Carbon Star V614 Monocerotis
Rick Wasatonic
CCD Photometry of the RR Lyrae Star SS Leonis
A. L. Anderson, W. J. Bestman, S. A. Bieszke, J. Blanchard, M. R. McPherson, T. R. McWilliams, S. T. Mikusko, E. C. Morse, T. N. Philpott, P. Sasse, D. T. Slee, D. A. Ventimiglia, H. A. Smith
V3821 Sgr and a Nearby Carbon Star
Dorrit Hoffleit
Period Update for V418 Cassiopeiae
Daniel H. Kaiser, Michael J. Collins
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Robert DeMartino, Michael Dzubaty, Dennis Kocyla, Christopher Predom, Edward Wetherbee
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Deborah C. Banks
Examination of the Complicated Cepheid HR 7308
Juan E. Cabanela
Analysis of AC Comae Berenices
Leith E. Dwyer
Updated Periods for CG and GY Coronae Berenices
Holly Jessop
A Revision and Update for V1176 Sagittarii
Holly Jessop
The Puzzling Behavior of EM Coronae Berenices
John C. Krueger
A Revision of the Variable Period of IM Aquilae
Dana Lehr
An Amplitude Analysis of TU Cassiopeiae
Vicki Mader
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Cynthia J. Ray
The Periods of NS and EP Cygni
David J. Reiss
The Complicated Period Changes of IV Cygni
Sandra M. Sweller
Another Look at the Period of HS Aquilae
Lisa Wenner
Phoebe Haas--An AAVSO Volunteer
Thomas R. Williams
Variable Star Observations in an Introductory Astronomy Course
C. Martin Gaskell
The Elements of V714 Cygni: Erratum
Emilia P. Belserene
Definitive American Relative Sunspot Numbers for 1990
Peter O. Taylor
A Long-Lived Active Area on the Sun
Peter O. Taylor, Matei Alexescu
Book Review--Observing Variable Stars: A Guide for the Beginner
John W. III Griese
A Low Frequency Tunable Gravitational Wave Antenna (Abstract)
Casper Hossfield
AR Herculis: Examination of Recent Behavior (Abstract)
Marvin E. Baldwin
The Objectives, Construction, and Many Uses of the Drew Observatory (Abstract)
John C., Jr. Dawson
Archaeoastronomy of the Old Stone Tower, Newport, RI (Abstract)
William S. Penhallow, Michael J. Brennan
Variations in the Surface Brightness of the Rotten Egg Nebula--OH231.8+4.2 (Abstract)
Joel Kastner, David Weintraub, Ben Zuckerman, Ian Gatley
Analysis of AAVSO Visual Observations of Four Small-Amplitude Red Variables (Abstract)
John R. Percy, Jorge Ralli
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Robert Stefanik
Shapley's Model for Cepheids (Abstract)
Barbara L. Welther
Some Variable Star Research Projects for Undergraduate College Students (Abstract)
Frederick R. West
Minutes of the 80th Spring Meeting (Charlestown, RI)
Clinton B. Ford
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AAVSO Headquarters
Classical Cepheid Committee Report
Thomas A. Cragg
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Clinton B. Ford
Spring 1990-1991 Committee Reports
Various
Eclipsing Binary Committee Report
Marvin E. Baldwin
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Kenneth C. Beckmann
Photoelectric Photometry Committee Report
Howard J. Landis
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Marvin E. Baldwin
Solar Division Committee Report
Peter O. Taylor
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Charles A. Whitney
Supernova Search Committee Report
Robert O. Evans
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Charles E. Scovil
Treasurer's Report, October 1, 1990-March 31, 1991
Theodore H. N. Wales
Corrected Observer Totals for 1988-1989
Anon.