Volume 20 Number 1 | 1991 |
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1 | A Method of Creating AAVSO Observing Charts by Computer Charles E. Scovil, Robert A. Leitner |
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6 | Computer Image Processing Techniques for the Production of AAVSO Observing charts Gilbert Weingarten |
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14 | Visual and Photoelectric Observations of DM Persei David B. Williams |
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18 | Phoebe Haas - An AAVSO Volunteer Thomas R. Williams |
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23 | pi PsA - Who Are You? Axel Thomas |
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25 | Photoelectric Photometry of the Carbon Star V614 Monocerotis Rick Wasatonic |
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28 | CD 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 |
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32 | V3821 SGR and a Nearby Carbon Star Dorritt Hoffleit |
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35 | Period Update for V418 Cassiopeiae Daniel H. Kaiser, Michael J. Collins |
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39 | Southern Variable/NSV Survey Robert DeMartino, Michael Dzubaty, Dennis Kocyla, Christopher Predom, Edward Wetherbee |
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41 | Variable Star Observations in an Introductory Astronomy Course C. Martin Gaskell |
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51 | Recent Data on IU Cygni Deborah C. Banks |
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53 | The Elements of V714 Cygni: Erratum Emilia P. Belserene |
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54 | Examination of the Complicated Cepheid HR 7308 Juan E. Cabanela |
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60 | Analysis of AC Comae Berenices Leith E. Dwyer |
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64 | Updated Periods for CG and GY Comae Berenices Holly Jessop |
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68 | A Revision and Update for V1176 Sagittarii Holly Jessop |
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71 | The Puzzling Behavior of EM Comae Berenices John C. Krueger |
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74 | A Revision of the Variable Period of IM Aquilae Dana Lehr |
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77 | An Amplitude Analysis of TU Cassiopeiae Vicki Mader |
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84 | QY Cygni Re-Examined Cynthia J. Ray |
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86 | The Periods of NS and EP Cygni David J. Reiss |
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90 | The Complicated Period Changes of IV Cygni Sandra M. Sweller |
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95 | Another Look at the Period of HS Aquilae Lisa Wenner |
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98 | Definitive American Relative Sunspot Numbers for 1990 Peter O. Taylor |
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101 | A Long-Lived Active Area on the Sun Peter O. Taylor |
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