Flipper

[Peter Ward]

Early days yet on this one...could only get Ha and OIII before both moon and clouds halted further progress.

The link is here

[peter_4059 (Peter)]

Now that is something you don't see every day. Will be keen to see how this pans out.

Thanks for the view.

[petershah (Peter Shah)]

Wow early days??....what a start...stunning!!

[JA]

Amazing Result

Best
JA

[multiweb (Marc)]

That's an awesome shot Peter. I like the clarity and depth.
Too faint for my skies though. I started on it in Oiii then gave up after one night.

[alpal]

Hi Peter,
looks great -
I'm surprised you got such a strong signal.


cheers
Allan

[jahnpahwa (JP)]

Peter, thats looking good!

The red star to the right of the nebular there, has a strong red halo/bloat while other stars in the field are looking good. Do you know whats going on there? Is that a feature you'd accept as "in the data" or something of a processing artefact? I'm interested as that sort of thing peppers every image I work on (I guess mostly because I don't use any masks in processing), and wonder if its something I should accept or invest time in addressing.

Cheers,
JP

[marc4darkskies (Marcus)]

Delicate and beautiful! Nicely done Peter.

[Peter Ward]

Originally Posted by marc4darkskies

Delicate and beautiful! Nicely done Peter.

Ta Marcus...getting there. The h-alpha data is surprisingly faint. I will likely have to swap out the 5nm filter for a 3nm one for a better S/N

Originally Posted by jahnpahwa

Peter, thats looking good!

The red star to the right of the nebular there, has a strong red halo/bloat while other stars in the field are looking good. Do you know whats going on there? Is that a feature you'd accept as "in the data" or something of a processing artefact? I'm interested as that sort of thing peppers every image I work on (I guess mostly because I don't use any masks in processing), and wonder if its something I should accept or invest time in addressing.

Cheers,
JP

Ta ..see above. The star likely is quite red, but it may simply be the h-alpha filter I'm using is a different spec to the OIII.

Originally Posted by alpal

Hi Peter,
looks great -
I'm surprised you got such a strong signal.


cheers
Allan

The QE if the camera is quite high. That plus a 3nm OIII shows faint structure even in tthe 5 minute subs.
Compared to my FSQ the AP130 has 60% or so more flux collection and is faster, running at f4.5...hence not too hard to harvest photons without
the heroic exposure times

Originally Posted by multiweb

That's an awesome shot Peter. I like the clarity and depth.
Too faint for my skies though. I started on it in Oiii then gave up after one night.

Originally Posted by JA

Amazing Result

Best
JA

Originally Posted by petershah

Wow early days??....what a start...stunning!!

Originally Posted by peter_4059

Now that is something you don't see every day. Will be keen to see how this pans out.

Thanks for the view.

Ta Guys. My estimate is it will need about double the exposure time gained so far. RGB stars would finish it off nicely.

[alpal]

Originally Posted by Peter Ward

The QE if the camera is quite high. That plus a 3nm OIII shows faint structure even in tthe 5 minute subs.
Compared to my FSQ the AP130 has 60% or so more flux collection and is faster, running at f4.5...hence not too hard to harvest photons without
the heroic exposure times.

Thanks Peter,
I'm a bit confused by what camera you used?
Your info at the bottom of the pic -

"SBIG FW7-STX AstroDon 5nm Ha 3nm OIII"
refers to a filter wheel - not a camera.


Was it your new QHY600?


cheers
Allan

[Peter Ward]

Originally Posted by alpal

Thanks Peter,
I'm a bit confused by what camera you used?
Your info at the bottom of the pic -

"SBIG FW7-STX AstroDon 5nm Ha 3nm OIII"
refers to a filter wheel - not a camera.


Was it your new QHY600?


cheers
Allan

Ah..yes...forgot to mention it my Frankencam configuration.

I'm running an AstroDon set in the FW7 but the h-alpha is 5nm.
Just ordered the 3nm....ouch! A little eyewatering in $A.

[alpal]

Originally Posted by Peter Ward

Ah..yes...forgot to mention it my Frankencam configuration.

I'm running an AstroDon set in the FW7 but the h-alpha is 5nm.
Just ordered the 3nm....ouch! A little eyewatering in $A.

Thanks Peter -
no wonder you have plenty of signal with the QHY600.
The IMX455 chip has a QE of

68% for Ha at 656 nm and
84% for OIII at 500 nm.


That's the new technology for you.



cheers
Allan

[Placidus (Mike and Trish)]

The selective distribution of the H-alpha within the nebula as selective little discrete threads is fascinating. I can't think of another object that is thus.

[ChrisV (Chris)]

Gee that is looking good. I've had a go, have 30 hours and it doesn't touch your rendition.

[Peter Ward]

Thanks for your comments...but... as it turns out, I buggered up my processing
by using the wrong flat fields.

In re-processing the data some quite faint stuff is now visible over a wider field, hence the uncropped (albeit rescaled for web-friendlyness) image at the same URL

[Ryderscope (Rodney)]

Very nice indeed. I the faint Ha and OIII distributed across the field is a great compliment to the image

[Peter Ward]

Originally Posted by Ryderscope

Very nice indeed. I the faint Ha and OIII distributed across the field is a great compliment to the image

Ta. With there being a few versions of this on the group at present, it was interesting to see the variation from camers/filters/instruments/exposure time etc. to the published result.

My 2.5 hours of data seems paltry, but still shows *Flipper's head fairly well.

Suffice to say the High QE cam + AstroDon's I had sitting, totally unused, for way too long, also clearly helped...

I'm looking forward harvesting a few more photons from this interesting object.

P.S. I was thinking our younger readers may be wondering WTF is "Flipper"
The link should clarify the choice of name.