|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
ASTRO: NGC 2392 ("lucky imaging")
A guy from Potsdam (which is the capital of the german state "Brandenburg",
which borders directly to Berlin; you leave Berlin to the southwest and enter Potsdam at the same time) recently posted a good image of NGC 2392 in a german astro-forum. He did it with 2 second-exposures with an EMCCD-equipped camera. This camera goes incredibly deep with short subexposures. See http://www.astronomicum.de/modules.p...ewtopic&t=7620 for 50x5 seconds of M27 in the upper row and 25x10 seconds in the lower row (the columns show different gain settings for this camera). I wanted to try something similar with my SXV-H9 camera, as I think that it has by far the best "conventional" CCD chip with antiblooming. I cheated a bit though and used 10 second subexposures. Taken from the middle of Berlin with a 10" Meade ACF at f/7.2 on a G11 mount, SXV-H9 camera, 42x10 seconds L, 17x10s R + 15x10s Ha, 28x10s G, 25x10s B. http://ccd-astronomy.de/temp3/2392colourgut.jpg Stefan |
#2
|
|||
|
|||
ASTRO: NGC 2392 ("lucky imaging")
On 3/29/2010 3:17 PM, Stefan Lilge wrote:
A guy from Potsdam (which is the capital of the german state "Brandenburg", which borders directly to Berlin; you leave Berlin to the southwest and enter Potsdam at the same time) recently posted a good image of NGC 2392 in a german astro-forum. He did it with 2 second-exposures with an EMCCD-equipped camera. This camera goes incredibly deep with short subexposures. See http://www.astronomicum.de/modules.p...ewtopic&t=7620 for 50x5 seconds of M27 in the upper row and 25x10 seconds in the lower row (the columns show different gain settings for this camera). I wanted to try something similar with my SXV-H9 camera, as I think that it has by far the best "conventional" CCD chip with antiblooming. I cheated a bit though and used 10 second subexposures. Taken from the middle of Berlin with a 10" Meade ACF at f/7.2 on a G11 mount, SXV-H9 camera, 42x10 seconds L, 17x10s R + 15x10s Ha, 28x10s G, 25x10s B. http://ccd-astronomy.de/temp3/2392colourgut.jpg Stefan I was thinking Luky imaging needs sub second exposures. It would here. I've found that in 5 seconds the FWHM of a star is pretty much the same as for many minutes. At 2 seconds I see a slight difference. Below that the star usually is too dim to get a good reading but watching the video camera I had before it fell out and I stepped on it, I'd need half second or shorter to have much improvement then I'd have to throw out 80% of the frames. Easier to wait for that super night. http://www.spacebanter.com/attachmen...tid=2262&stc=1 Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
|
|||
|
|||
ASTRO: NGC 2392 ("lucky imaging")
Rick,
I guess it is true that 2 second exposures are not "lucky imaging". But if you count in guiding errors, the term starts to make sense again :-) Stefan "Rick Johnson" schrieb im Newsbeitrag . com... On 3/29/2010 3:17 PM, Stefan Lilge wrote: A guy from Potsdam (which is the capital of the german state "Brandenburg", which borders directly to Berlin; you leave Berlin to the southwest and enter Potsdam at the same time) recently posted a good image of NGC 2392 in a german astro-forum. He did it with 2 second-exposures with an EMCCD-equipped camera. This camera goes incredibly deep with short subexposures. See http://www.astronomicum.de/modules.p...ewtopic&t=7620 for 50x5 seconds of M27 in the upper row and 25x10 seconds in the lower row (the columns show different gain settings for this camera). I wanted to try something similar with my SXV-H9 camera, as I think that it has by far the best "conventional" CCD chip with antiblooming. I cheated a bit though and used 10 second subexposures. Taken from the middle of Berlin with a 10" Meade ACF at f/7.2 on a G11 mount, SXV-H9 camera, 42x10 seconds L, 17x10s R + 15x10s Ha, 28x10s G, 25x10s B. http://ccd-astronomy.de/temp3/2392colourgut.jpg Stefan I was thinking Luky imaging needs sub second exposures. It would here. I've found that in 5 seconds the FWHM of a star is pretty much the same as for many minutes. At 2 seconds I see a slight difference. Below that the star usually is too dim to get a good reading but watching the video camera I had before it fell out and I stepped on it, I'd need half second or shorter to have much improvement then I'd have to throw out 80% of the frames. Easier to wait for that super night. http://www.spacebanter.com/attachmen...tid=2262&stc=1 Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#4
|
|||
|
|||
ASTRO: NGC 2392 ("lucky imaging")
that's a heck of a nice image Stefan!
"Stefan Lilge" wrote in message ... A guy from Potsdam (which is the capital of the german state "Brandenburg", which borders directly to Berlin; you leave Berlin to the southwest and enter Potsdam at the same time) recently posted a good image of NGC 2392 in a german astro-forum. He did it with 2 second-exposures with an EMCCD-equipped camera. This camera goes incredibly deep with short subexposures. See http://www.astronomicum.de/modules.p...ewtopic&t=7620 for 50x5 seconds of M27 in the upper row and 25x10 seconds in the lower row (the columns show different gain settings for this camera). I wanted to try something similar with my SXV-H9 camera, as I think that it has by far the best "conventional" CCD chip with antiblooming. I cheated a bit though and used 10 second subexposures. Taken from the middle of Berlin with a 10" Meade ACF at f/7.2 on a G11 mount, SXV-H9 camera, 42x10 seconds L, 17x10s R + 15x10s Ha, 28x10s G, 25x10s B. http://ccd-astronomy.de/temp3/2392colourgut.jpg Stefan |
#5
|
|||
|
|||
ASTRO: NGC 2392 ("lucky imaging")
In article , Stefan Lilge
wrote: A guy from Potsdam (which is the capital of the german state "Brandenburg", which borders directly to Berlin; you leave Berlin to the southwest and enter Potsdam at the same time) recently posted a good image of NGC 2392 in a german astro-forum. He did it with 2 second-exposures with an EMCCD-equipped camera. This camera goes incredibly deep with short subexposures. See http://www.astronomicum.de/modules.p...ewtopic&t=7620 for 50x5 seconds of M27 in the upper row and 25x10 seconds in the lower row (the columns show different gain settings for this camera). I wanted to try something similar with my SXV-H9 camera, as I think that it has by far the best "conventional" CCD chip with antiblooming. I cheated a bit though and used 10 second subexposures. Taken from the middle of Berlin with a 10" Meade ACF at f/7.2 on a G11 mount, SXV-H9 camera, 42x10 seconds L, 17x10s R + 15x10s Ha, 28x10s G, 25x10s B. http://ccd-astronomy.de/temp3/2392colourgut.jpg Stefan begin 666 2392colourgut.jpg Hi Stephan; Nice image.. Here's my shot of it this spring: http://www.outcastsoft.com/AstroImag...A_20100305.jpg Check out the enlarged view (stacked at 3x normal size) too on the bottom left corner. Thganks for sharing.. Milton Aupperle http://www.outcastsoft.com/AstroImages/AstroIndex.html |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
might Odissey-Moon be the Google's expected, preferred, designed,"chosen" and (maybe) "funded" GLXP team to WIN the prize? with ALL otherteams that just play the "sparring partners" role? | gaetanomarano | Policy | 3 | September 27th 08 06:47 PM |
just THREE YEARS AFTER my "CREWLESS Space Shuttle" article, theNSF """experts""" discover the idea of an unmanned Shuttle to fill the2010-2016 cargo-to-ISS (six+ years) GAP | gaetanomarano | Policy | 3 | September 15th 08 04:47 PM |
and now, Ladies and Gentlemen, the NSF "slow motion experts" have(finally) "invented" MY "Multipurpose Orbital Rescue Vehicle"... just 20 | gaetanomarano | Policy | 9 | August 30th 08 12:05 AM |