Either way, the best subtraction seems to be in the center. Towards the top it's a bit off, and for the bottom it's quite poor. Once I finished the second image, Dr. Sandquist advised me to go ahead and process the rest of them since I seem to have found the settings that work best.
At 11:00, Dr. Sandquist gave us a brief presentations on giving presentations since we have to do that Friday. Although he recommended a few things I didn't have, I think I'm going to ignore them. For instance, I don't really feel it's necessary to have a summary slide for a 5 minute presentation. I don't think anyone's memory is that bad.
I also spent a bit of time today trying to identify the single variable star Crinklaw & Talbert identified amidst the few thousand stars in the images. To do so, I took the finding chart from their paper, printed it out, and tried to match it up with our images. If you'd like to play along, here's the images:
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This is the finder chart. The variable star is identified by the red circle. It may help to click to view the image in full and print it.
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Here's the actual image I'm working with (with a little photoshopping of the levels to increase contrast).
NOTE: Just as I had to deal with, the two images may not be the same scale, area, center, or orientation! It took me about 3 minutes to locate. How quickly can you do it?
If you need the answer, click here.
At this point, I took a break for lunch and decided to take a quick nap. Quick of course meaning a little over 2 hours. When I woke up it was almost time for dinner so I decided to spend the little bit of time before then making a few quick changes to my powerpoint as I've decided that there my be a bit too much information for a 5 minute presentation, and I should drop a slide or two.
I did, however, add a few slides at the beginning as a refresher on properties of open clusters since not everyone in the group has much astronomy background. Once I made these changes, I Emailed it to my advisor back in Kansas for approval.
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