Muon trace

Started Nov 8, 2021 | Discussions thread
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iso rivolta Senior Member • Posts: 1,080
Muon trace
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November 4th was a great day for auroras, due to a G3 geomagnetic storm. I was at only 51 degrees latitude and at sea level, so no auroras, but I used my KP to shoot dark frames and, luckily, several particles interacted with the camera sensor during 4 minute exposures at ISO 100 (Bulb with Timed exposure). The KP was in the camera bag, lens cap on, and I controlled it with Image Sync from my smartphone. I did 5 exposures and in most of them I found some linear artefacts. Below is the longest trajectory I got. This should be the trace of a muon, a massive and short lived negatively charged particle arising when protons (cosmic rays) from the Sun collide with gas nuclei in Earth's upper atmosphere. It interacted with the surface of the KP sensor for about 212 pixels (824 microns) in length. There was no damage found afterwards (dead or stuck pixels).

100% crop, no levels adjustment, no noise reduction, straight from dcraw

 iso rivolta's gear list:iso rivolta's gear list
Pentax K200D Pentax K-3 II Pentax KP +6 more
Pentax KP
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