Pier-14 is now back up and running - Older jobs ?

Great idea, but you may want to consider this.

For a short while just keep the old jobs suspended to give some people time to look at what they had entered. They can then resubmit that job adjusted for the new scope and camera angle.  Also they might consider amending the numbers and exposure times on any LRGB entries present, on the basis of what was recommended on the RGB vs LRGB post. Once that's been done they can easily ask for the old job to be removed. Then after whatever deadline you impose, you can delete all remaining old jobs.

What do you think?

Cheers, 

Ray 

I'm easy Ray, its your pier as a group to run, I am just trying to keep it tidy so I know where I am and can keep on top of things :)

Let me know when you all decide as I have them disabled at present anyway

Steve

Steve, 

Thanks for the reply however... 

You may well have a long wait for those replies that's why I suggested you (for once) made an executive decision on something. They may listen to you. :)

Cheers,

Ray 

Good morning Steve, 

At present I believe all the new jobs submitted to pier 14 are requesting equal numbers of subs for RGB. Do we yet have a recommended ratio to use? Now might be a good time to start trying it out if there is one. 

Cheers, 

Ray 

I forgot to mention this, but Michael (ramba.zamba) has already written for himself an app to assist with working out the numbers required. This would certainly help me out if it was available.

As you can see it allows you to enter the total integration time and exposure time, then calculates the numbers to be entered when submitting the job.

Hi Ray,

I haven't quite understood how the RGB Qe calculation works (how the numbers are calculated in Michael's program). If someone could explain this to me or Michael could send me his program code, I would integrate the tool on my website. So the tool would be available to everyone.

CS
Darius

Hi Darius, hold fire for now as we are looking into it at present

Lets see if its possible to implement it somehow into our Roboscope's system, not even sure if that's possible but if it is it would be a massive bonus :)

I will go away and ask people way smarter than myself!

Steve

Hi Darius,

it is based upon the QE of the sensor within the bandpass of the different filters, as depicted in the attached image for the ASI2600MM-pro camera.  The same applies to the ASI6200MM and the ASI461MM. From there one ca derive the number of needed subs for each filter, given a desired number of hrs of total integration time and a sub duration.

Michael has written a script to help with these calculations.

Can also be done in Excel: https://docs.google.com/spreadsheets/d/12f24MjVf4hWp2z82I7JTCC7U24_FAoKo/edit?usp=sharing&ouid=117955988834414900747&rtpof=true&sd=true

I will write a more general script for this in the coming days.

Cheers

Manuel

Thank you Manuel for the explanation. I think I understand it now :) Steve's solution of implementing the script into Roboscopes' system sounds like the best solution to me.

CS
Darius

Thank you Manuel for the explanation. I think I understand it now :) Steve's solution of implementing the script into Roboscopes' system sounds like the best solution to me.

 

CS
Darius

 

No pressure, Steve!!

Thank you Manuel for the explanation. I think I understand it now :) Steve's solution of implementing the script into Roboscopes' system sounds like the best solution to me.

 

CS
Darius

 

No pressure, Steve!!

In this case its smart people who  sort & implement it I hope, no extra pressure for a dullard like me :)

Steve

please get rid of all of my old jobs - thx P

please get rid of all of my old jobs - thx P

No worries, I was going to remove them all this evening anyways LOL

Check your email, I am sending you an image and my mobile so we can speak about it, the image will go on the forum with a new crib sheet in a few days but in the meantime I think you will find it invaluable :)

Steve

hi

so for the new jobs series starting 2000, will we be getting new darks and flats ?

vikas

Until the calibration data is made available, which I assume will be shortly, here is some preliminary data from job 2201 of ic1396 , the Elephant Trunk nebula which we are all familiar with.

The subs were all 180s exposures, with 5 each in RGB and 20,30,40 respectively in Ha, O3 and S2. As noted below only 30 of the S2 were used.

Caution

These images have come from uncalibrated data, the only calibration being, Cosmetic Correction and Background Extraction. Only a quick glance of the data was carried out and as a result 10 from the S2 data were excluded, these appeared to me to be slightly out of focus. Also all the included images are in JPEG format, a 'lossy' format.

Early analysis leads me to conclude that the Ha filter appears to be the weakest in terms of aberrations, you may however arrive at a different conclusion. To assist you are some images. Refer back to the cautionary notes above.

Included are 5x5 panel mosaics from Aberration Inspector using a panel size of 1024 pixels, which you should be able to zoom into at 100%. Included are close ups of the Garnet star, Mu Cephei, taken in Ha, O3 and S2, as this star was not part of the mosaics. The RGB images of that star appeared fine and are not included.

Owing to the amount of data there needs to be a second post, which will follow shortly.

The following images are sequenced in Ha, O3 and S2 order. The Aberration Inspector mosaics followed by close ups of Mu Cephei.

Now some RGB data.

Images from Aberration Inspector for the Red, Green and Blue filters respectively. Finally a quick process of an SHO image with RGB stars.

HTH

hi

so for the new jobs series starting 2000, will we be getting new darks and flats ?

vikas

Hi

Darks and bias are done awaiting upload, flats in a few days

We are still working on the pier anyway at present so expect some duff imaging blocks for the next few days, just re submit as required

Looks like we have a few tweaks left on the mount but initial data looks great.

Ray thanks for the images, 180s for NB appears to be more than enough. I have put in some 120s narrowband jobs and will post the results if my work life ever gets out of the way. 

F3.3 really is ridiculously fast and the QE of these modern CMOS sensors is just brilliant. 

I think once this scope is dialled in we’re going to have a beast from the East on our hands!