Sunday, February 10, 2008

20080210 Quiet Sun continues

Still very quiet, it's essentially cloudy today, but have a few minutes of break when I could see the outline of the solar disc through the cloud, I still setup my Borg, and at some moments, I could detect that there's no sunspot on the solar disc.

There seem to be no big prominences as well.


Experiment: I found that the blocking filter in the visual back of the PST is different from the BF10, not just for its size, but also for the transmission, I found that ERF + PST etalon + BF10 can show H-alpha detail but ERF + PST etalon + PST blocking filter cannot show H-alpha detail at all.

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