Scope:
FSQ-106N at f/5;
Location: DAA Observatory, Shelter
Valley, CA;
Dates:
29, 30 January, 21, 22, 23 February, 2025;
Camera: ASI2600MM
(Astronomik
type 2c Ha, OIII, LRGB filters)
Exposure:
30.5 hrs
Lum -
64 x 3 min (gain-101
1x1),
RGB -
48 x 2 min (gain-101 1x1) each RGB exposures.,
Ha - 135
x 5 min (gain-160
1x1),
OIII -
135 x 5 min (gain-160
1x1),
Processing:
Data
Collection - N.I.N.A. Sequencer (as FITs). Sub-frame calibration -
Pixinsight (WBPP).
Sub-frame registration and integration (Average combine
- Linear clipping) - PixInsight (WBPP).
Noise reduction - NoiseXTerminator - PixInsight.
Non-linear
stretching, normalization and gradient removal - PixInsight.
Photometric
RGB calibration (SPCC) - PixInsight.
Deconvolution
of Lum, Ha, OIII, and RGB stacks (RGB combine) - BlurXTerminator.
Generation
of starless nebulosity Lum, Ha, OIII , and RGB images for later processing
- StarXTerminator.
Curves,
Levels, RGB combine - PixInsight. RGB Stars and starless combine -
PixInsight.
Final
finishing - Affinity Photo.
Annotation
- PixInsight, Aladin (Simbad ), and Affinity Photo.
This
image is a modified HOO Narrow Band and screened LRGB starless
construction - with RGB stars added. Image processed at 6248x4176
resolution.
Final
Image size is approximately 4156x5360.
Description:
North is left in this image. The
supernova remnant, SNR G206.9+02.3, is in the lower part of the image -
identified by its blue highlights. The supernova event took place sometime
15,000 to 60,000 years ago. Its distance is estimated at
