|
Instrument |
12.5" RCOS @
~ f/9 (2880 mm fl) at 0.64 arcsec/pixel. Shown at 1.36 and 3.26 arcsec/pixel. |
|
Mount |
Paramount ME |
|
Camera |
SBIG STL-11000 w/
FW8 filter wheel & AstroDon Gen-2 LRGB & 6nm Ha filters. |
|
Acquisition Data |
6/11/2011 to 7/2/2011 Chino Valley, AZ. with
CCDAutoPilot3 & CCDSoft. AOL
guided |
|
Exposure |
|
Lum |
180 min (12 x
15 min) Bin 1x1 |
|
Ha |
840 min (28 x
30 min. each channel) Bin 1x1 |
|
RGB |
540 min (12 x
15 min. each channel) Bin 2x2 |
Click
here for an Ha filtered b/w image.
eXcalibrator RGB
ratios are 1.00, 0.82 & 0.87 |
|
Software & Processing Notes |
-
CCDSoft, CCDStack,
PixInsight, Photoshop CS6.
-
eXcalibrator
v5.0 for (g:r) color balancing, using
74 stars from the APASS 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 & Ha sub
exposures, non-linear stretching with HistogramTransformation and to create the LRGB image.
-
PhotoShop to add
the Ha data and the final touch-up.
|
|
Comment |
North is to the right.
Sh2-104, also
cataloged as DWB 14, is about 14,000 light years away toward the
Cygnus constellation. |
