|
|
Click the image for a larger
FOV.
(2400 x 1600 1.17 MB)
|
Instrument |
12.5" RCOS @ ~f/9
(2880 mm fl) at 0.64 arcsec/pixel. Shown at 3.40 and 1.06 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
11/13/2010 to 1/3/2011
Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft. AOL guided |
|
Acquisition Data |
2/25/2012 to 3/24/2012 Chino Valley, AZ... with CCDAutoPilot5
& CCDSoft. AOL guided. |
|
Exposure |
|
Lum (no filter) |
465 min
(31 x 15 min, bin 1x1) |
|
RGB |
765 min (17 x
15 min each, bin 2x2) |
RGB ratios are 1.00,
0.94 & 1.06 |
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS6, PixInsight and Noel Carboni's actions.
-
eXcalibrator
v4.36 for (g:r) color balancing, using 229 stars from the
SDSS-DR9 database.
-
CCDBand-Aid
to repair
KAI-11000M
vertical bars.
-
CCDStack to
calibrate all sub exposures, register and stack the color and create the RGB image.
-
PixInsight
processing includes registering and stacking the luminance,
gradient repair, non-linear stretching with HistogramTransformation,
HDRMultiscaleTransform and LRGB creation.
-
PhotoShop for the final
touch-up.
-
Noiseware 5, a PhotoShop plug-in.
|
|
Comment |
North is to the top.
The Perseus galaxy
cluster (Abell 426) is about 250 million light-years from our galaxy
and contains more that 500 catalogued galaxies. The brightest member
is NGC 1275, near the left edge of the image, at magnitude 11.6. NGC
1275 is a strong source of radio waves and x-rays.
Abell 426 is the dominant member of the Perseus-Pisces supercluster.
The super cluster extends to 300 million light-years and covers 40
degrees of the winter sky. |
|
