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Time-Series Photometry: CCDs vs. PMTs

Published online by Cambridge University Press:  12 April 2016

T.J. Kreidl
T.J. Kreidl*
Affiliation:
Lowell Observatory, Flagstaff, Arizona 86001, U.S.A.

Abstract

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With the ability to obtain simultaneous photometry of many objects, CCD time-series photometry is a potentially powerful method for obtaining data, even under non-photometric conditions. In particular, the ability to utilize one or more comparison stars on the same frame without the need to move the telescope to a different field makes for a higher duty cycle than conventional photoelectric photometry. In addition, the ability to determine the local sky in a variety of ways plus the ability to use more complex analysis techniques such as profile fitting and curves of growth permits a variety of analysis options. Some of the advantages of utilizing CCDs and the techniques used in time-series photometry of compact objects are discussed. With the flexibility of modern CCD control systems, possibilities for real-time or near real-time data analysis using readily available computer technology are stressed. Brief discussions of periodicity analysis considerations and other aspects of the data acquisition are presented.

Type
Session 6 Photometry with CCDs
Information
International Astronomical Union Colloquium , Volume 136: Stellar Photometry – Current Techniques and Future Developments , 1993 , pp. 311 - 317
Copyright
Copyright © C.J. Butler and I. Elliottt 1993

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