It explains the underlying principles of the instruments used, and the applications and inferences derived from measurements. Each chapter has been fully revised to account for the latest developments, including the use of CCDs. Highly illustrated, this book provides an overview and historical background of the subject before reviewing the main themes within astronomical photometry. The central chapters focus on the practical design of the instruments and methodology used. The book concludes by discussing specialised topics in stellar astronomy, concentrating on the information derived from the analysis of the light curves of variable stars and close binary systems.
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It includes numerous bibliographic notes and a glossary of terms. It is ideal for graduate students, academic researchers and advanced amateurs interested in practical and observational astronomy. Reviews from the first edition: 'This book usefully fills a gap between a simple popularist approach to photometry and a full-scale research monograph, and is a perfect starting-point for more advanced levels.
The presentation is very good throughout and I would recommend the book to any astronomer interested in photometry. Visit Seller's Storefront. Please contact me if you are not satisfied with your order in any manner. I always list book by ISBN only and buyer is assured of correct edition, correct author and correct format of book.
Name of your business and form of legal entity: Ami Ventures Inc. Orders usually ship within 1 business days. If your book order is heavy or oversized, we may contact you to let you know extra shipping is required. List this Seller's Books. Payment Methods accepted by seller. AbeBooks Bookseller Since: 31 May Differential photometry is the measurement of the difference in brightness of two objects. In most cases, differential photometry can be done with the highest precision , while absolute photometry is the most difficult to do with high precision. Also, accurate photometry is usually more difficult when the apparent brightness of the object is fainter.
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To perform absolute photometry one must correct for differences between the effective passband through which an object is observed and the passband used to define the standard photometric system. Typically this correction is done by observing the object s of interest through multiple filters and also observing a number of photometric standard stars. If the standard stars cannot be observed simultaneously with the target s , this correction must be done under photometric conditions, when the sky is cloudless and the extinction is a simple function of the airmass.
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To perform relative photometry, one compares the instrument magnitude of the object to a known comparison object, and then corrects the measurements for spatial variations in the sensitivity of the instrument and the atmospheric extinction. Relative photometry is typically more practical,  and given its widespread use, standard zero points have been defined in the astronomical community. Differential photometry is the simplest of the calibrations and most useful for time series observations. This is very useful when plotting the change in magnitude over time of a target object, and is usually compiled into a light curve.
For spatially extended objects such as galaxies , it is often of interest to measure the spatial distribution of brightness within the galaxy rather than simply measuring the galaxy's total brightness. An object's surface brightness is its brightness per unit solid angle as seen in projection on the sky, and measurement of surface brightness is known as surface photometry. For small solid angles, a useful unit of solid angle is the square arcsecond , and surface brightness is often expressed in magnitudes per square arcsecond.
A number of free computer programs are available for synthetic aperture photometry and PSF-fitting photometry. SExtractor  and Aperture Photometry Tool  are popular examples for aperture photometry. The former is geared towards reduction of large scale galaxy-survey data, and the latter has a graphical user interface GUI suitable for studying individual images.
There are a number of organizations, from professional to amateur, that gather and share photometric data and make it available on-line. Some sites gather the data primarily as a resource for other researchers ex. AAVSO and some solicit contributions of data for their own research ex.
CBA :. From Wikipedia, the free encyclopedia. Monthly Notices of the Royal Astronomical Society.
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Observing Variable Stars, Novae and Supernovae. Cambridge University Press. Retrieved 20 May August Soviet Astronomy. Bibcode : SvA September Annual Review of Astronomy and Astrophysics. The Astrophysical Journal.
Bibcode : ApJ The Astronomical Journal. Bibcode : AJ Retrieved 21 May British Astronomical Association. Sky and Telescope. Norton's Longmore Scientific.
Astronomy and Astrophysics Review. Retrieved 22 May The Astrophysical Journal Supplement Series. Bibcode : ApJS