K) “Good” vs “Bad” Images
Check the status of your second image, by either going to Skynet (it may still be open in another tab) and clicking on Optical Observing under the MY OBSERVATORY menu, or by going to Afterglow Access.
If your image has been completed, open it in Afterglow Access as you did previously. The image should automatically open in the display window.
In the 6:36 video below, Tyler will discuss what to look for in your image to determine if is acceptable for analysis (a “good” image), or if the image is not useful for analysis (a “bad” image.)
The link before the video is to a PDF of the images referred to in the video. It is possible to make tactile images of these if the equipment is available.
Using the checklist below, go through each of your returned images to determine if they are “good” (acceptable) or “bad” (not acceptable) for analysis. Use your Observation Journal to discuss each of your returned images. Put the information in the “notes” column.
1. STREAKS: Wind or bad telescope operation cause streaks in the image.
2. SPIKES: Overexposure results in spikes – this is caused pixel saturation.
3. DONUTS: Out of focus causes donut like circles.
4. GRAINY: Underexposure results in a “grainy” look.
5. BRIGHT SPOT: An odd reflection or large bright spot could be the moonlight reflecting off part of the telescope.

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