Download A Practical Guide to Lightcurve Photometry and Analysis by Brian Warner PDF

By Brian Warner

Tools for newbie astronomers who desire to transcend CCD imaging and step into ‘serious’ technological know-how. The textual content bargains options for accumulating, examining, and publishing facts, and describes joint tasks during which amateurs and scholars can participate. Readers discover ways to realize and keep away from universal blunders in collecting photometry info, with designated examples for research. comprises reports of accessible software program, with monitor photographs and priceless tips.

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Read Online or Download A Practical Guide to Lightcurve Photometry and Analysis (Patrick Moore's Practical Astronomy Series) PDF

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Additional resources for A Practical Guide to Lightcurve Photometry and Analysis (Patrick Moore's Practical Astronomy Series)

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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. 5 m, you can afford a slightly noisier signal, especially if it means the difference between getting data or not. 02 m. The Photometry Primer 35 However, in those cases you’ll probably need to get more data so that any analysis can average the noisy data and so find a period and amplitude. This approach has been used quite often to turn what, under other circumstances, might have been marginal data at best into usable data.

This method is preferred by some because the intensity and color of the light can be controlled. Color does have a slight effect on flat fields. In many cases, however, the effect is small enough to ignore. A word of caution if you construct a white card or surface for dome flats. All white paint is not created equal and does not reflect all colors equally or even nearly so. There are some paints that while they appear white are actually quite red. This can make for very long exposures when shooting flats with B or U filters.

Actually, you should take several of these images and then average or median combine them to form a master bias frame. For the most part, bias frames are not required if you exposure your dark frames (see below) for the same time and temperature as your target frames, since the bias is included in the dark frame. , dark frames taken at different exposure time and/or temperature than the science image. Scaled darks are often used when the exposure for the raw images is on the order of tens of minutes.

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