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Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Thomas V Davis

June 15, 2005 12:04 AM Forum: CCD Imaging and Processing/Deep Sky

M16 wide field

Posted By Thomas V Davis
Here's one from last night. I decided to shoot a fairly wide field to show the surrounding nebulosity. It turned out showing a uncommon view of a commonly imaged object.

AP 155 EDF f/7 w/FF
STL-11000M
HaR RGB (60:60): 60:60:60 min; bin 1x1

(The Ha image turned out pretty neat -- I'll post it separately)

Tom

June 15, 2005 12:18 AM Forum: CCD Imaging and Processing/Deep Sky

M16 Ha wide field

Posted By Thomas V Davis
Here's the H-alpha image used in my HaRRGB posted earlier. It's incredible to see all the wisps of nebulosity around M16.

AP 155 EDF f/7 w/FF
Ha 6nm 60min

Tom



June 18, 2005 07:53 PM Forum: CCD Imaging and Processing/Deep Sky

M20 wide field in H-alpha

Posted By Thomas V Davis
I took this last night with the bright moon. FWHM 2.0.; 20 min exposures x 7

Astro-Physics 155 EDF f/7
STL-11000M
Ha 6nm 140min; bin 1x1

I'll have to wait for less of a moon to get the color data -- still a pretty interesting region in Ha.

Tom

June 19, 2005 04:03 PM Forum: CCD Imaging and Processing/Deep Sky

M17 Ha: under a bright moon

Posted By Thomas V Davis
Here's from last night. Again, I'll have to wait for less moon before aquiring the color data.

AP 155 EDF f/7
STL-11000M 20min frames x 7
Ha 6nm 140min; Bin 1x1
FWHM 2.19

Tom

June 24, 2005 03:13 AM Forum: CCD Imaging and Processing/Deep Sky

Reprocess: Helix H-alpha

Posted By Thomas V Davis
Weather has shut me down again so back to the old data. This from last fall. I reprocessed so to not clip the black point and get a better histogram stretch.

I hope redoing the old data like this does not bore you -- sorry.

Tom

June 26, 2005 02:10 AM Forum: Wildlife Photography

Near Tetons

Posted By Thomas V Davis
I took this image this weekend (June 25,2005) near the Tetons. I was hiking near a Boy Scout camp on the Idaho side of the Tetons when I noticed a large US flag draped on one of the large granite cliffs. The scouts were having a graduation ceremony after a week of training. They hung a 50ft US flag near the waterfall named Big Medicine. I thought it looked pretty cool.

Wishing you all a safe and enjoyable Independence Day,

Tom Davis

June 27, 2005 02:40 AM Forum: CCD Imaging and Processing/Deep Sky

Helix LLRGB

Posted By Thomas V Davis
I finally got around to reprocessing the RGB data that matched my recently posted Ha data of the Helix. These data were taken last fall. I stretched the data better this time I think. The OIII region in the center turned out well with a subtle teal color.

This is a LLRGB processing with the L=Ha.

AP 155 EDF f/7
ST-10XME
Ha 175min, RGB 35:35:35 min; Bin x 1

Tom

June 30, 2005 01:36 AM Forum: CCD Imaging and Processing/Deep Sky

My Ha version of the Crescent

Posted By Thomas V Davis
Here's my H-alpha version of the Crescent Nebula in Cygnus.

AP 155 EDF f/7
ST-10XME
Ha 6nm 90min

Tom

July 2, 2005 05:34 PM Forum: CCD Imaging and Processing/Deep Sky

M20 - M21 region

Posted By Thomas V Davis
Here is my latest. It is the M20 - M21 region. I present it in a slightly larger FOV than generally seen.

AP 155 EDF f/7
STL-11000M
(HaB)RGB (90,40):30:30:40min; Bin x 1

Larger version: http://www.tvdavisastropics.com/astroimages-1_000034.htm

Comments welcome.

Tom

July 8, 2005 06:32 PM Forum: CCD Imaging and Processing/Deep Sky

NGC6822 Barnard's Galaxy

Posted By Thomas V Davis
I've been wanting to get this for a couple of years. Various problems have kept me from imaging it. This year I got it! It is challanging to process due to its very low surface brightness. I imaged with the goal of bringing out the Ha regions of this very faint galaxy (thus the unusual filter combinations). I find it interesting to see the subtle bar across the middle of the galaxy! My aperture doesn't resolve the central stars like a big RC would but I think it turned out ok none the less.

AP 155 EDF f/7
ST-10XME
(ClrHa)(RHa)GB (60,180)(60,50):60:60 min

Tom

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