Click on image to enlarge
Lum = Luminance Stack + [NII] Ha [OIII] stack
Red = Red Stack + [NII] Stack
Green = Green Stack + Ha Stack + [OIII] Stack
Blue = Blue Stack + [OIII] Stack
Al Kelly took the LRGB Data, see his webpage here, see his image here
Richard Crisp took the [NII] Ha and [OIII] data, see that image here
Al Kelly did the processing and used AIP4WIN exclusively
------Equipment and exposure details
Equipment used by Richard Crisp and his exposure details:
Astro-Physics AP155EDF imaging scope @1085mm focal length (f/7)
SBIG ST10XME imaging camera @ -30C
Astro-Physics 80mm guide scope
SBIG ST7E Guide control camera @-10C
FLI CFW 1 filter wheel
Custom Scientific Narrowband Emission Line Filter
[Nitrogen II] 658.3nm 3nm FWHM
Hydrogen alpha 656.3nm 3nm FWHM
[Oxygen III] 500.7nm 3nm FWHM
Exposure details:
4 exposures of 30 minutes for Halpha binned 2x2
5 exposures of 30 minutes for [SII] binned 2x2
1 exposure of 30 minutes for [OIII] binned 2x2
5 hours total exposure time
Maxim DL used for ST10XME control
Equipment used by Al Kelly and exposure details:
12" Takahashi FRC300 (Ritchie Chretien)
ST8E CCD Camera
CFW8a Filter wheel and Custom Scientific filters
The scope is an automated, remotely operable instrument located near Cloudcroft NM. It is owned by Arnie Rosner, who lets users operate it through his Rent-A-Scope business.
Eighteen 300-second clear-filtered subexposures,
eight 300-second subexposures in red,
seven 300-second subexposures in green,
eleven 300-second subexposures in blue were processed in AIP4WIN