CaK from Nov 1st
Posted 06 November 2013 - 10:46 PM
FDCOL by Sullij1, on Flickr
AR 1884 AND 1885 by Sullij1, on Flickr
AR 1884 AND 1885 AND FRIENDS by Sullij1, on Flickr
LIMBCOLOR by Sullij1, on Flickr
Thanks for looking.
Posted 08 November 2013 - 12:40 PM
Posted 08 November 2013 - 01:24 PM
Posted 08 November 2013 - 02:36 PM
What is the layer activity that is seeing when someone see trhough a KCa Filter?
Posted 08 November 2013 - 07:05 PM
Ca II K is the lower chromosphere, 500-1500 Km above the photosphere.
the filter is centered at 393.4nm with a bandwidth of 0.22nm. This gives a range of 393.29nm-393.51nm. In the literature the Ca II K line is split into 3 regions, the K1, K2, and K3. Each region shows a specific area of the chromosphere and with the K1 region being 393.32nm to the K3 region being at 393.37nm (where prominences can be seen) the bandwidth clearly covers the whole of this region of the chromosphere giving a general mix of heights visible in the chromosphere in Ca II K filters. The K1 or K2 region (500-1000 km) is lower than the Ha; core region (1500 km) above the photosphere, but the K3 region is around 1800 km in height.
Clear skies to you and Pat.