Home > Solar > Solar views August 25th – First decent filaprom image!

Solar views August 25th – First decent filaprom image!

OK so what the heck is a filaprom image I hear you ask. The term probably originated amongst the solar imagers on the Cloudy Nights Solar Forum http://www.cloudynights.com/ubbthreads/postlist.php/Cat/0/Board/solar to describe the point where a flat surface filament viewed from above crosses over the solar limb and becomes visible as an aerial prominence curving out over the limb. With the larger arching prominences this presents imagers with the opportunity to catch an almost 3D view combining filament and prominence in what we call a filaprom. They are notoriously difficult to capture properly and require a lot of processing to show the filaprom against the surface and floating up above the chromosphere. Users of large aperture solar scopes, particularly the double-stacked variety, will find these much easier to capture, but I wanted to see if it could be done with a PST. The main problems with the PST are the small aperture which doesn’t allow the large magnifications required and the low surface contrast. I found that the best way to try and introduce a hint of that 3D effect is to turn the image negative, boost the contrast slightly and then colourize in a faint colour which retains the filament foot on the surface as well as the prominence arch.  Anyway, judge for yourselves whether this has been successful – i’m quite pleased with it !  Images taken with DMK41/PST Ha/PST CaK.

Filaprom !


Weak magnetic AR’s 1274 & 1275 with new sunspots rounding the limb to the left

Categories: Solar
  1. No comments yet.
  1. No trackbacks yet.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: