Hi Richard, It has been awhile... I and my brother was having a discussion the other night about using LPI filter (as Lum) and Ha and O as the narrowband color...
Richard Excellent!! Just what I was looking for... I and my brother will be doing some experimentation and send the group the results Thanks Jason ... ...
please do Jason and tell Jimmy hi for me too :-) rdc ... From: Jason To: narrowbandimaging@yahoogroups.com Sent: Wednesday, April 02, 2008 3:39 PM Subject:...
Here's a couple of Ha galaxy images that I've tried. Certainly need long exposures: M101: http://www.buytelescopes.com/gallery/photos/13294.jpg M33:...
that's right you did some nice ones too, Peter those long exposures need improved cooling too; if you don't want to have the dark shot noise exceed the read...
Thanks, and you are quite correct on the exposure length, which is why I always use a minimun of 30 minutes to an hour these days (or past days in my case...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the narrowbandimaging group. File :...
narrowbandimaging@yah...
Apr 4, 2008 4:07 am
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Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the narrowbandimaging group. File :...
narrowbandimaging@yah...
Apr 4, 2008 4:08 am
6043
My point on the exposure time is that the dark shot noise monotonically grows with time in a square root of time relationship provided the current leak rate is...
Hi, I have futher developed this technique. More info in the Blog: http://astroanarchy.blogspot.com/ Here are direct links for the lates image pairs: Sh2-240...
looks really neat J-P reminds me of the Grateful Dead skull logo... ... From: hercule1939 To: narrowbandimaging@yahoogroups.com Sent: Saturday, April 05, 2008...
Larry Lopez started a thread on the ccd tech group a while back that was looking into what happens to the s/n of the image if you break up the exposure into...
I'm going to work this some more when I have time. What I'm going after is under what conditions are you doomed. In other words if you need to take short...
Hi I'm looking into trying HA I see a ATK 2HS CCD Camera on AM and would that be a good choice to start? Which HA filter should I use? I have been color...
I looked up the camera to find out the sensor and found this: Low cost, high performance, monochrome air cooled astronomical CCD camera, with 640x480 array and...
what a difference in the forecasts from the NWS toward the end of this week versus the beginning. Thurs was clear, but the seeing was a bit disturbed. I went...
I have 2- 10" astrographs available and would like to sell one of them Both scopes were modified by me one scope is OEM- ASA, with upgraded primary mirror,...
I mentioned that I let the M51 galaxy shot let run unattended last night and then I got up at 3am to image a summer nebula. Well that was M16 and I did get 2...
I use CCDNavigator as my primary target identification tool and am having trouble locating emission nebulae or other suitable H-a targets while the moon is...
just for fun I added three hours of Halpha to the previous unfiltered data and that was just short of 2 hours it is definitely accentuates the HII knots ... ...
I have been imaging M16 the past two mornings but I have to wait until 3am for it to be in sky position. There are nearly always some planetary nebulae out...
Good sharp eyes Joe I wonder how that happens? I had copied the URL from the browser line, pasted it into an email and posted it then grabbed my copy of the...
I've had people tell me the same thing (about spaces in my links) on other Yahoo groups. Maybe it's a bug or some Spam prevention stuff. ... Maker of high...
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