|
|
Click the image for an
uncropped ~ 75% size
view. (2700 x 1800 - 1.25 MB)
|
Instrument |
12.5" RCOS @
~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 0.87 and 1.85 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
FW8 filter wheel, AstroDon Gen-2 filters. |
|
Acquisition Data |
11/8/2015 to
12/16/2015 Chino Valley, AZ. with CCD Commander & CCDSoft. AOL
guided |
|
Exposure |
|
Lum |
240 min (16 x
15 min) Bin 1x1 |
|
RGB |
405 min ( 9 x
15 min. each channel) Bin 2x2 |
eXcalibrator RGB ratios are 1.00,
1.00 & 1.05 |
|
Software & Processing Notes |
-
CCDSoft, CCDStack,
PixInsight, Photoshop CS6.
-
eXcalibrator
v4.36 for (g:r) color balancing, using
38 stars from the
SDSS-DR7 database.
-
CCDBand-Aid to repair
KAI-11000M vertical bars.
-
CCDStack to
calibrate all sub exposures and create the RGB image.
-
PixInsight to
register, normalize, data reject, combine the luminance sub exposures,
gradient removal, non-linear stretching with HistogramTransformation,
core detail enhancement with HDRMultiscaleTransform and to create the LRGB image.
-
PhotoShop for the final touch-up.
-
Noiseware 5, a PhotoShop plug-in.
|
|
Comment |
The galaxy is shown is rotated
35° counter-clockwise.
M77, also cataloged as
NGC 1068, is a face-on barred spiral galaxy in the constellation
Cetus, at a distance of about 47 million light-years. Pierre Méchain
discovered the galaxy in 1780.
|
|
