|
|
|
Instrument |
Takahashi FSQ-106ED @
f/5.0 (530 mm F.L.) Captured at 2.1 arcsec/pixel. The Zoomify
image scale is 2.80 to 9.74 arcsec / pixel. |
|
Mount |
Losmandy G11 with Gemini L4 v1.0 |
|
Camera |
SBIG STF-8300M Self
Guiding Package w/ mono ST-i, using Baader LRGB and an Astrodon Ha filter. |
|
Acquisition Data |
9/25/2012 to 10/21/2012 Chino Valley, AZ... with CCDAutoPilot5
& CCDSoft. Off-axis guided. |
|
Exposure |
|
Lum |
100
min. (20 x 5 min. bin 1x1) |
|
RGB |
195 min. (13 x
5 min. each bin 1x1) |
|
Hα
|
525 min. (35 x 15 min.
bin 1x1)
|
Click
here for the color-mapped narrow band images.
Click
here for the Ha filtered image. |
|
Software |
-
CCDSoft, CCDStack,
Photoshop CS6, PixInsight and Noel Carboni's actions.
-
eXcalibrator v3.1 for (g-r) color balancing, using 881 stars
from the SDSS-DR8 database.
-
CCDStack to calibrate,
register, normalize, data reject, combine the sub exposures and
create the RGB image.
-
PixInsight for
gradient removal and
initial non-linear stretching.
-
PhotoShop for the LRGB
combine & final touch-up. Ha data was added to the
red channel.
-
Noiseware 5, a PhotoShop plug-in.
|
|
Comment |
North is to the right.
Sharpless 157, the
Claw Nebula, is a bright emission nebula in the constellations
Cassiopeia and Cepheus at a distance of about 8,000 light-years. At
the bottom-right is the open star cluster NGC 7510, about 9,900
light-years away. |
|
