(Click on image for full size version)
|Description:||M109 is a barred spiral that is around 55
million light years distant.
|Exposure Data:||5/1,2/2003. LRGB: 15x10m, 6x10m, 6x10m,
6x10m, RGB 2x2. -20°C, 0.49 arc-sec./pixel.
|Processing:||Acquired via Sequencer and Maxim, reduced and
aligned, gradient correction in Mira, combined with Sigma Reject plug-in, L:
20xRL in AIP4WIN, RGB combined 1.27:1.00:1.69 in Maxim, LRGB assembly,
curves, levels, USM other processing in Photoshop.
|Optical System:||12.5” Ritchey-Chretien RCOS Truss @ F/9,
CCD camera, L: AO-7 guided, RGB: autoguided with Paramount ME mount.
|Comments:||Seeing was around 2.5 arc-sec. The image deconvolved to
1.6 arc-sec. Here is a version with
a 10" RC truss and ST-10XME and here is a
version with a 10" RC truss and ST-8E.