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|
|
Instrument |
12.5" RCOS @
~f/9 (2880 mm fl) 0.64 arcsec / pixel. The Zoomify image scale
is 0.64 to 2.86 arcsec / pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/ internal filter wheel, AstroDon Gen II Filters |
|
Acquisition Data |
1/18/2012 to 3/1/2012 Chino Valley, AZ... with CCDAutoPilot3
& CCDSoft. AOL guided |
|
Exposure |
Lum 630 min. (21
x 30 min. bin 1x1 - best of 34)
RGB 270 min. (
6 x 15 min. each, bin 2x2) |
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS3 w/ the Fits Liberator plugin, Noel Carboni's actions.
-
eXcalibrator v3.0 (g-r) color balancing, using 66 stars
from the SDSS-DR7 database.
-
PixFix32 (pre-beta) to
repair column defects.
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CCDBand-Aid (pre-beta) to repair the
STL-11000M vertical bars.
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CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures,
selective deconvolution and
the RGB color image.
-
PhotoShop
none-linear stretching
and the LRGB combine.
-
Noiseware Pro, a PhotoShop plug-in.
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Comment |
North is to the top.
From left to right
these three galaxies, in the constellation Leo, are NGC 2970, 2968
and 2964 and are at the respective distances of 84, 81 and 71
million light-years. NGC 2968 and 2964 are possibly a pair, while
the interactive association between NGC 2968 and 2970 is clearly
indicated by the connecting bridge.
The image contains
1470 background galaxies, to magnitude 22.7. Additionally, the
image has one QSO at redshift 1.79.
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