Bagged a little NB data prior to work comittments, and finally had a chance to put it together.
Very nearly didn't publish this, as frankly it needs 10x more data, but.... who knows when mother nature will co-operate on that
I also came to the realisation there is a real dark art to NB processing...the learning curve was fun. The field is un-cropped and shows some field curvature with the 16803 sensor. The trap is nicely resolved in the original data, with e & f stars to boot
As time goes on I expect I will be able get some more exposure time, smooth the noise and extract some subtle SII information..... anyway enough with the excuses and waffle:
I like the colours and composition Peter but that big old chip is really pushing the scope judging by the star shapes on the outer edges. Be interesting to see how your new scope handles it.
I like the colours and composition Peter but that big old chip is really pushing the scope judging by the star shapes on the outer edges. Be interesting to see how your new scope handles it.
Mark
Agreed....there are all sorts of things going on at the edges that I never really noticed until I put the NB filter wheel in place. Part of the problem is the stars are so tight... showing up any tilt, curvature or less than optimal spacing...which all need fixing.
Attached is 100% crop of the SII core data.... given it is 40 minutes of exposure and not a stack of "planet cam" shots...the stars are as tight as a fishy's...well..... you get the drift
At the same URL is a roll-over image of the Trapezium via Hubble and my somewhat smaller earth-bound Ritchey.
To be fair, there are decidedly higher resolution HST images of the trap, making my stars look like amateur-amoebic-blobs, but this I/R one shows more background stars.
I'd be interested to know: have any IIS members have imaged this region in NIR ?
At the same URL is a roll-over image of the Trapezium via Hubble and my somewhat smaller earth-bound Ritchey.
To be fair, there are decidedly higher resolution HST images of the trap, making my stars look like amateur-amoebic-blobs, but this I/R one shows more background stars.
I'd be interested to know: have any IIS members have imaged this region in NIR ?
Yes - I have. Not one of my best IR images but it does show a lot of stars.
Attached is 100% crop of the SII core data.... given it is 40 minutes of exposure and not a stack of "planet cam" shots...the stars are as tight as a fishy's...well..... you get the drift
Very tight indeed. Really nice.
Quote:
Originally Posted by Stevec35
Yes - I have. Not one of my best IR images but it does show a lot of stars.
Basically you have infrared luminance which doesn't pass anything shorter than 700nm and R,G and B having responses centered at 850, 830 and 750nm. It's not narrow band though as the filter responses are quite broad. I've enjoyed playing around with the IR filters and of course they enabled me to image that recently discovered globular apparently before anyone else.
The colour is not to my taste Peter, but the detail is excellent. Very sharp and the stars are not pink. Perhaps a larger resolution would be even more interesting to view.
The colour is not to my taste Peter, but the detail is excellent. Very sharp and the stars are not pink. Perhaps a larger resolution would be even more interesting to view.
Colour? Not to taste? Too much Chilli??
Thought about larger res file... but it needs more SII data...and being knobbled by the perpetually cruddy weather here...it will not happen soon it seems.
P.S.
AP Riccardi Honders due to lob in about 9 days
Last edited by Peter Ward; 23-01-2012 at 07:12 PM.
Reason: Ipad keyboard
