By Brian D. Warner
A useful advisor to Lightcurve Photometry and research offers, for
those with entry to even a modest telescope and CCD digital camera, all the
information had to participate in the clinical learn of asteroids and
Using commercially to be had gear, beginner astronomers can
determine the rotation cost, measurement, and form of asteroids. equally, it
is attainable to find the dimensions, temperature, and orbits of stars in
binary platforms through the use of this robust technique.
A useful advisor to Lightcurve Photometry and research includes all the
material wanted for readers to appreciate the idea, and stay away from the
practical pitfalls of lightcurve photometry. targeted examples are
given for acquiring facts, and naturally for the intriguing and rewarding
task of studying the knowledge to figure out the actual homes of the
Any collage pupil or beginner astronomer who desires to transcend mere
imaging with a CCD digital camera and input the not easy global of "real
science" through the lightcurves of asteroids and binary stars will find
everything priceless during this book.
Read or Download A Practical Guide to Lightcurve Photometry and Analysis PDF
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Extra resources for A Practical Guide to Lightcurve Photometry and Analysis
When taking raw flat images, the system should be near the same focus as for when you take target images, usually infinity. If not, then some of the dust particles may produce different sized donuts than at infinity focus. Once you have a master flat, you shouldn’t move the camera or change anything about the system. If you do, you’ll have to repeat the process. The good news is that once you have a good master flat, you can usually use it for a few days if not weeks. Don’t go too long. Those dust particles do accumulate.
However, other than those stars that are marked as Landolt standards, do not use stars from the LONEOS catalog to determine the transformation values. 05m. This is good in many cases but not good enough for determining transformation values. However, a particular plus for the LONEOS catalog is that it does provide more recent and accurate positions for the Landolt stars. 8 Henden Sequences Arne Henden has produced a number of photometric sequences that can serve as excellent substitute, near secondary, standards.
You can get an approximate error of any given measurement by using 1/SNR – assuming the SNR value is valid. However, this is in terms of flux and not magnitudes. 1 gives some examples of converting SNR to magnitudes. 1 Errors in magnitudes for given SNR values. Be careful about taking these values literally by assuming that SNR alone indicates the data errors. Other errors, including systematic, influence the true error. 4 What Is an Acceptable SNR? 1 m, an SNR of 100 becomes important; you don’t want the noise to be a significant portion of the lightcurve.