47 Tuc

[Hagar]

This image of 47 vTuc is a combine of 12 X 2 minute exposures and 12 X 30 second exposures for the core area. Looking at the background I could do with taking some 3 - 5 minute exposures to make the background star field jump out a bit more.

This was only a test after making some radical changes to the camera settings and getting everything well balanced in software. I need to do some more testing before I can reveal the changes made.

Details:
12 X 2 minute exposures each LRGB
12 X 30 second exposures each LRGB
Calibrated using CCDStack.


Hi Res Version (http://www.darkskyau.com/cm/displayimage.php?pid=334&fullsize=1)

[desler]

Can't wait to see the results mate!

Radical change! Your more game than me! I'm just happy that everything works when I plug it in! haha!

Darren

[gregbradley]

Nice and sharp. The processing though has left a donut hole in the centre - a lasso or something used in the processing taming the core?

Greg.

[multiweb]

Nice round stars, no burning. It's working! :thumbsup:

[Alchemy]

Intruiging...... Radical changes.

I have just been bench testing my qhy9 to determine it's gain and offset, using this process
http://www.cool.id.au/astronomy/Neb_tut/Scientifically%20determining%20CCD% 20Gain%20and%20Offset.pdf

I came up with 20 gain and 80 offset, an interesting process, I was aware of the offset but not quite so with determining the gain .... But got it now so set and forget at -20C

Guess we will just have to wait to see what the radical changes are

Didn't realize tuc47 was so blue....

[Hagar]

Thanks Mate. Well radical for me anyway.



I noticed that myself Greg. It will need a bit of a rework I think.



Thanks Mark.



Thanks Clive. The big change is what you are up to now. Increasing the gain to 40% and offset to 102 was rather a frightening thing to do after running the camera at 1 and 125 for so long. I must say it will be interesting to see what some long exposures hold with this change.

[mill]

Mate what happened to the right and left bottom corners??
They are blueish :shrug:
To me it looks like the gain has gone a wee bit too high:question:

[Hagar]

I am inclined to agree with you Marty. This was purely experimental and I will be doing another test of these settings on an easier target with some other settings.

I have included a black and white version and an inverted version of the 120sec stacked image on it's own. This looks much better. Probably my processing skills are a bit rusty or don't exist.

[Ross G]

Hi Doug,

A very sharp photo with detail right to the core.

Ross.