Scope:
Celestron 9.25 Edge HD 235 mm at f/7;
Location: DAA Observatory, Shelter
Valley, CA;
Dates:
2, 26, 27 August, 2024;
Camera:
ASI294MM (Baader Ha, OIII, RGB Filters);
Exposure:
16.5 hrs
RGB -
32 x 1.5 min (gain-121 2x2) each RGB exposures.,
Ha - 124
x 3.5 min (gain-160 2x2,
OIII -
118 x 3.5 min (gain-160 2x2),
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 RGB starless
construction - with RGB stars added. Image processed at 6248x4176
resolution.
Final
Image size is approximately 4817x7608.
Description:
North is left in this image. This
image is a close-up of an interesting region within the Soul Nebula, IC 1848. It
evokes the idea of a small man climbing a mountain to reach the stars.
Aside from this
climbing imagery the universe is showing us, the image has some dark nebulae
within. TGU H879 P16, Dobashi 3918, and Dobashi 3919 are the dark nebula toward
the center of the image.
The bright nebula
around Dobashi 3913 (center of the image) is an ISM structure RNO 11 - sometimes
referred to by the name 'LW Cas Nebula'. The top of the image is the northern
half of LBN 673 - a north/south band of hydrogen emission.
IC 1848 is known as
a star forming region. A study in IR wavelengths produced a catalog of star
forming in the Westerhout 5 / IC1848 region - [KAG2008] (Koenig, Allen,
Gutermuth et al.). Over 17,000 sources were identified. About 900 were deemed
'extragalactic' and thus eliminated. 18 were identified as 'Globules'. This
image contains three of those Globules - Globule 10, 11, and 13. Globule 10 and
11 are 'trunk' types - the 'mountain' peaks above the little man; 13 is a
cometary type globule toward the bottom of the image.
