NGC1275
Peculiar
Galaxy and Galaxy Cluster AGC426
in
Perseus
Uploaded
12/4/10
This field includes scores
of galaxies ranging from the brightest - NGC1275 at magnitude
11.9 to the faintest at the sky limit around 20th magnitude.
(its hard to find galaxy magnitudes once you get beyond around
mag 18 or so) NGC1275 is a very peculiar object, with twin hydrogen
sprays extending out both sides (E-W) resolved by the Hubble
to consist of very fine crab nebula like filaments. At a size
of 2.2 arc minutes its quite small because of its remote distance.
You will note that
nearly all of the galaxies - except one at the top - are quite
tawny in color. The inter galactic dust tends to yellow more
distant objects these measure a B-V index around 1.0, very yellow
indeed.
At the top and
just to the right is another closer object, a tiny blue barred
spiral listed as an SB peculiar. It is about the only blue galaxy
in this field! It is 16th magnitude and obviously has active
star formation occurring at this time. (Active galaxies are typically
much more blue from new hot stars)
On the right edge,
a nice face on spiral, NGC1268 shows some details. Its listed
at 14.2 magnitude.
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Instrument: 12.5" f/5 Home made Newtonian
Mount: Astrophysics 1200 QMD
CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling
Guider: Meade DSI Pro w/Lumicon Newt Easy Guider
Exposure: LRGB = 2.5h total
AstroDon RGB Combine Ratio: 1: 1.05: 1.2
Location: Payson, Arizona, Elevation: 5150 ft.
Sky: Seeing FWHM = 8 arcsec (Maxim DL - 10min subframe), Transparency 8/10
Outside Temperature: 35 F
CCD Temperature: -30 C
Image Processing Tools:
Maxim DL: Calibration, deblooming (Starizona Debloomer), aligning, stacking
PixInsight: Curves, Deconvolution
Photoshop CS2: Curves, Color Correction, Gradient removal (Grad Xterminator), Cleanup
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