Contents

• Introduction
  • X--ray Activity and PMS Stars.
  • T Tauri Stars, Naked and Otherwise
  • Direct Monitoring of Rotational Modulation
  • Rotation Periods of ZAMS Stars
  • Rotation Periods of PMS Stars
  • This Work
• Observational Data
  • The Orion OB1 Association
  • Source Selection
  • Optical Photometry
  • Calculation of Extinction from Optical Colors
    • Infrared Data
    • Spectroscopic Data
  • Fits to Evolutionary Models
  • Completeness
    • X--ray Quiet PMS Candidates
    • Very Low Mass PMS Objects
• Period Analysis
  • Period Determination
    • Phase Dispersion Minimization
    • Periodogram
    • False Alarms and Aliasing
    • Windowing
  • Simulations
    • Synthetic Modulation
    • Starspots
  • Period Criteria
• Results
  • Specific Stars
    • TAP 26
    • P1724
  • Other Stars
    • Stars with Highly Secure Periods
    • Stars with Less Secure Periods
    • Stars without Periods
• Discussion
  • Biases
  • Relations
  • Evolutionary Effects
  • Rapidly Rotating Stars
• Conclusions
• Finding Charts
• Lightcurves and Observational Data
  • Secure Rotation Period Determinations
  • Period Determinations of Moderate Confidence
  • Highly Uncertain Period Determinations
• The Care and Feeding of the Mount Stony Brook Observatory
  • Introduction
  • The Telescope and Dome
  • The Computer Hardware and Relevant Equipment
  • CCD Systems and Their Hardware
    • The Lynxx
    • The ST-4
    • The ST-6
  • Data Acquisition
    • Target Finding
    • Data Acquisition with the Lynxx
    • The ST-4
    • ST-6 Data Collection
  • Data Storage
    • Data Formats
    • Data Storage Media
  • Data Processing
    • Quick Look Tools
    • The Lynxx Tools
    • IDL
    • IRAF
  • A Night At The Telescope
    • The End Of The Night
  • Training
    • Week 1
    • Week 2
    • Week 3
    • Week 4
  • Maintenance
  • Future Improvements
  • Help Sheets For Operation Of The PC
    • Lynxx Time Sheet
    • PC To VAX FTP Commands
    • 14" Telescope Shut Down Check Sheet
  • IDL Program Help Pages
• The Epsilon Aurigae Secondary: A Hydrostatically Supported Disk
  • Introduction
  • Characteristics of the Aurigæ System
  • Vertical Structure of the Secondary: Hydrostatic Model
  • Eclipse Lightcurves for the Hydrostatic Model
  • Disk Expansion and Absorption Line Profiles
  • Summary
• About this document ...