(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,
ST-10XME NABG/CFW-8A
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. |
