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| Date: | July, 2005/August, 2007 |
| Location: | Elizabeth, CO. Mag 5 skies, elevation ~6500 ft |
| Telescope: | 16" f/4.9 Newtonian, Pegasus Optics primary, working at f/9.8 |
| Mount: | Mathis Instruments MI-500 w/ AP1200 computer control |
| Exposure Duration: |
Luminance = Total 144 mins (2.4 hrs) Color = Total 80 min, median of twenty 4 min sub-exposures. |
| Imagers: |
Luminance = SBIG ST-10XME w/ AO-L Color = SBIG 2000 XCM w/ AO-7 |
| Filtration, etc.: |
Luminance = Custom Scientific luminance filter mounted in front of 2x TeleVue 2" PowerMate, giving f/9.8 Color = SBIG research grade luminance filter mounted in front of 2" Lumicon coma corrector. Coma corrector mounted to front of AO-7 |
| Guiding: |
Luminance = AO-L guided at ~7 Hz Color = Assisted AO-7 operation. XCM w/ AO-7 running at ~5 Hz, with bump corrections turned off. During color exposures, ST-8E mounted in off-axis pickoff port of Van Slyke Sidewinder and concurrently issued "regular" speed up/slow down mount corrections at about 2 Hz |
| Seeing: | ~2" |
| Comments: |
Luminance = 8 min subexposure calibrated using dark and flat frames, median combined in sets of three, medians summed using Maxim DL. DDP/histogram adjustment applied using Maxim. 50 iterate PC deconvolution in CCDStack Color = 4 min subexposures calibrated using dark and flat frames, converted to RGB. Color subexposures median combined, DDP/histogram adjustment applied in Maxim. Registration of color and luminance images in Registar. Final LRGB assembled in CCDStack |
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