The Sun on 2011-07-24 with Closeup of AR1254 and Prominence

Blogged by Aurélie Le Fort Beunink on July 25, 2011 and tagged with Sample Images, Sun.

Temperatures are still high (93).But skies were a little better. Today I imaged a whole disk solar image and a close up of AR1254 with some real nice prominences and AR1259.Both closeups are presented in normal and inverted brightness processing.

For the full disk image I captured two images, each 300 frames with a gamma of 42, exposure time 1/455 sec, and the gain at its default 260 for the surface image, and the gamma was raised to 177 for the prominence image.

AR1254 and the prominences is also a composite image of two. Gamma at 42, exposure time of 1/60 and the gain at 260.For the image of AR1258, the exposure time was shortened to 1/77 and the gain was raised to 279.

Each image captured 300 frames of which the best 200 were stacked and sharpened in Registax and final processing in Photoshop.

Theo Ramakers

Please click to enlarge: