So we have new flats after the prism removal and this leaves me asking you a question as to what next
You have Flats with and without prism so...
Do we
1- leave as it and then when the data from existing jobs is finished you simply apply the correct calibration to the subs
2 - Re start existing submissions a fresh
3- remove them and you put a load of jobs in that you want to replace them with
Please come back to us with an idea of what you want to do ?
Steve
You have Flats with and without prism so...
Do we
1- leave as it and then when the data from existing jobs is finished you simply apply the correct calibration to the subs
2 - Re start existing submissions a fresh
3- remove them and you put a load of jobs in that you want to replace them with
Please come back to us with an idea of what you want to do ?
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
It really is only test data as the moon was very bright and the high clouds made even M42 look washed out!!.... was only good enough for testing......but it will give you an idea of how the field will look.
Peter Shah - Collimation & Telescope servicing.
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk
We can supply your new high quality Newtonian or Dall Kirkham Astrograph
Visit my personal imaging website at astropix.co.uk
For Image Processing Tutorials
Contact: pete@ccdimaging.co.uk
We can supply your new high quality Newtonian or Dall Kirkham Astrograph
Peter Shah
Roboscopes Observatory Controller
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Hi Steve,
Sure hoping the problem disappears, but alas my OCD to solve and understand anything that to me is illogical will not go away. I've had to admittedly concede defeat on trying to understand the concept of time, but something as basic as this will continue to haunt me until I receive a rational explanation.
Spock
Sure hoping the problem disappears, but alas my OCD to solve and understand anything that to me is illogical will not go away. I've had to admittedly concede defeat on trying to understand the concept of time, but something as basic as this will continue to haunt me until I receive a rational explanation.
Spock
Ray
Roboscopes Guinea Pig
Just had a quick look at the 300 sec subs. Only 12 were usable, and that meant including some with variable cloud cover, but enough to see whether the prism problem has been cured.
Just calibrated, stacked and auto-STF applied.
No sign of the prism shadow.
I have a look at the 20 sec subs later.
Just calibrated, stacked and auto-STF applied.
No sign of the prism shadow.
I have a look at the 20 sec subs later.
Spiders the sky was milky last night, one of the good reasons we dont image on or around full moon it highlights everything. You just image all night for below par data even with tight band pass filters.
At least it looks like we are good to go on the new "No OAG" imaging runs
Ray will be so pleased I am sure
Steve
At least it looks like we are good to go on the new "No OAG" imaging runs
Ray will be so pleased I am sure
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
OK. Here are the 20 sec subs. Same process as before. Fewer thrown away because completely clouded out, but some smearing of stars.
Trapezium stars peak at around 0.8 in Pixinsight, so we certainly can't go much longer than 20 sec without saturating, especially with tighter stars from better seeing.
The 300 sec looked good on the outer tendrils, even with only 12 fairly grotty subs, so I think our target should be 20 sec, 90 sec and 300 sec for an HDR image.
Trapezium stars peak at around 0.8 in Pixinsight, so we certainly can't go much longer than 20 sec without saturating, especially with tighter stars from better seeing.
The 300 sec looked good on the outer tendrils, even with only 12 fairly grotty subs, so I think our target should be 20 sec, 90 sec and 300 sec for an HDR image.
cool
It may still be worth trying a quick 10s test on a good clear night with no stupid size moon as the SNR will be far higher and you may get what you need with shorter subs for the core
Just a thought is all
It may still be worth trying a quick 10s test on a good clear night with no stupid size moon as the SNR will be far higher and you may get what you need with shorter subs for the core
Just a thought is all
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
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Hi Steve,
Yes I am really pleased. Somewhat disappointed though that without Peter's skills the best I can manage is a cropped monochrome image of Simeis 147. Despite some cropping I just couldn't handle the weak O3 stack and shadow of the obstruction to match the Ha data.
I was really excited about that particular target until the data landed. Optimistically though there's always next year to collect some more.
Taking those M42 images was a great idea, and those 300s exposures go very deep confirming my positive opinion of that combination.
Thanks,
Ray
PS
I know that I asked for M31 to be halted due to the weather, but any chance of capturing some blue filter data. Only a few had been taken and I couldn't use any of them. Thanks in anticipation.
Yes I am really pleased. Somewhat disappointed though that without Peter's skills the best I can manage is a cropped monochrome image of Simeis 147. Despite some cropping I just couldn't handle the weak O3 stack and shadow of the obstruction to match the Ha data.
I was really excited about that particular target until the data landed. Optimistically though there's always next year to collect some more.
Taking those M42 images was a great idea, and those 300s exposures go very deep confirming my positive opinion of that combination.
Thanks,
Ray
PS
I know that I asked for M31 to be halted due to the weather, but any chance of capturing some blue filter data. Only a few had been taken and I couldn't use any of them. Thanks in anticipation.
Ray
Roboscopes Guinea Pig
I understand
Peter having to work hard with the complex gradient was enough to make up my mind up to get the OAG issue out to bed despite the obvious losses as if I am honest we both knew that most users would struggle to produce comparable finished images
short term Pain for long term gain I suppose
Ray, are you ok to put M31 in afresh please as a complete dataset, now we are post prism it will be better I feel ?
Ps
re S147
next year we prepare early, moon down only and discuss exactly what to take but For starters
1-2hrs each RGB
5-7hrs HA
10-15hrs OIII
20-25hrs SII
would be a great ball park guess
Steve
Peter having to work hard with the complex gradient was enough to make up my mind up to get the OAG issue out to bed despite the obvious losses as if I am honest we both knew that most users would struggle to produce comparable finished images
short term Pain for long term gain I suppose
Ray, are you ok to put M31 in afresh please as a complete dataset, now we are post prism it will be better I feel ?
Ps
re S147
next year we prepare early, moon down only and discuss exactly what to take but For starters
1-2hrs each RGB
5-7hrs HA
10-15hrs OIII
20-25hrs SII
would be a great ball park guess
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
0
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Votes
Steve,
Thanks for the swift reply.
I'll submit M31 again, no worries. Regarding S147 next time and the Sulphur filter, I'd be happy to go with an initial 6 hours just to see if there is any mileage in doing 20 hours.
Cheers
Ray
Thanks for the swift reply.
I'll submit M31 again, no worries. Regarding S147 next time and the Sulphur filter, I'd be happy to go with an initial 6 hours just to see if there is any mileage in doing 20 hours.
Cheers
Ray
Ray
Roboscopes Guinea Pig
No worries
Ray 6 hours will show so little, you would abandon that filter most likely. Honestly its a 15hr plus mission for SII but I will say despite me saying about SII previously (see below) because of the low signal, if you give the object a low priority plus moon down and we get on it early enough in the season that the SII will 1000% be a worth while obsession.
My earlier musings regarding SII were because of all the reasons above and I knew we had the time for a good bi-colour image but it was far to late in the season to do "Hubble" full justice on the remaining filter
Steve
Ray 6 hours will show so little, you would abandon that filter most likely. Honestly its a 15hr plus mission for SII but I will say despite me saying about SII previously (see below) because of the low signal, if you give the object a low priority plus moon down and we get on it early enough in the season that the SII will 1000% be a worth while obsession.
My earlier musings regarding SII were because of all the reasons above and I knew we had the time for a good bi-colour image but it was far to late in the season to do "Hubble" full justice on the remaining filter
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
0
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Votes
Steve,
Thanks for the suggestion. On balance for such little gain at the expense of what could be used better elsewhere, I'm happy to abandon any Sulphur data. Something similar to the image crafted by Peter would be my ultimate goal, and does not require any S2 data. Anyway, that data would probably get lost during my processing. I hope though that we can at least do that maximum time you allotted for the O3.
Best regards,
Ray
Thanks for the suggestion. On balance for such little gain at the expense of what could be used better elsewhere, I'm happy to abandon any Sulphur data. Something similar to the image crafted by Peter would be my ultimate goal, and does not require any S2 data. Anyway, that data would probably get lost during my processing.
I hope though that we can at least do that maximum time you allotted for the O3. Best regards,
Ray
Ray
Roboscopes Guinea Pig
No worries Ray, I will leave you to input as a future object as a when it start rising again order
just put in notes section moon down low priority please
Steve
just put in notes section moon down low priority please
Steve
Please ignore my dylexia wherever possible, just be thankful I can control my Tourettes ;)
Things to do, so little time!
Steve
Roboscopes Tea Boy
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