by Craig and Tammy Temple
After selling some of our astro equipment to fund the purchase
of our new QSI583wsg and Astrodon filters, we were without anything to image
DSOs for several weeks. Well the camera and filters finally arrived and we
finally got some clear skies, so here is our first image, which is also our
first bicolor.
Found in the constellation Cygnus (The Swan), the Eastern portion of the Veil
Nebula supernova remnant, also known as Caldwell 33, is comprised of three
portions. The brighter portion is NGC 6992 and connects with NGC 6995 and
IC1340. It is displayed here in false "bi-color" representation. Narrowband
filters were used to isolate the hydrogen-alpha (Ha) and oxygen-3 (OIII)
emissions and reveal the structure of the nebula. Discovered in 1784 by William
Herschel, The Veil complex (or Cygnus Loop) appears dim since it is spread over
a large area. The source supernova violently exploded some 5,000 - 8,000 years
ago leaving only these expanding filaments behind.
Telescope: Stellarvue Raptor SVR105 @ f/7
Accessories:
Stellarvue SFF7-21 flattener; Dew control by Dew Buster
Mount: Orion Atlas
EQ-G controlled by EQMOD performance tuned by Astrotroniks
Camera: QSI583wsg
CCD @ -10.0C
Guiding: Starlight Xpress Lodestar via PHD
Filters: Astrodon
5nm Ha, OIII
Exposure: 12 x 20min. OIII, 11 x 20min. Ha
Acquisition:
ImagesPlus 4.0c Camera Control
Processing: Calibration, DDP in Images Plus
v4.0
Post-processing: Adobe Photoshop CS5 using
Steve Cannistra’s bi-color combination techniqueDate(s): June 30, 2011
& July 2, 2011
SQM reading (begin - end): N1:19.21-19.20;
N2:19.00-clouds
Temperature (begin - end): N1:76.8ºF-68.5ºF;
N2:78.8ºF-73.8Fº
Location: Hendersonville, TN, USA