Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Used some data on NGC3729 from Liverpool 2 meter

  • Please log in to reply
7 replies to this topic

#1 Mert

Mert

    Cosmos

  • *****
  • topic starter
  • Posts: 7,875
  • Joined: 31 Aug 2005
  • Loc: Spain, Pamplona

Posted 16 May 2021 - 06:36 AM

Hi all,

 

After reading the posibility to use data from the Liverpool 2 meter

telescope, I tried to get some data on NGC3729.

Since it's raining and I can not get any data from my scope right now

I thought it be interesting to see how that data looks.

The whole set ( 61 frames with different filters and exposure times )

was integrated into 1 image.

To me it is amazing that with little integration time ( aprox 1,5 hour )

there are such an incredible amount of background galaxies visible.

Aperture rules tongue2.gif

 

Stay well,

Mert

 

Attached Thumbnails

  • NGC3729-LP 2 meter-CN.jpg

  • Ptarmigan, jim kuhns, elmiko and 4 others like this

#2 elmiko

elmiko

    Fly Me to the Moon

  • *****
  • Posts: 5,915
  • Joined: 27 Jul 2009
  • Loc: Arizona

Posted 16 May 2021 - 10:27 AM

Very nice Mert! I hope your skies clear up soon, so you can get out and image. Are you still under lockdown?


  • Hobby Astronomer likes this

#3 Hobby Astronomer

Hobby Astronomer

    Surveyor 1

  • *****
  • Posts: 1,896
  • Joined: 18 Dec 2013
  • Loc: Texas

Posted 16 May 2021 - 10:40 AM

Wow!

 

Very nice image. What did you think of all that data up there?

 

I wonder how far away all of those little galaxies are?

 

The scope is an F/3 system, almost as fast as a hyperstar set up but more forgiving.

 

Seems like there is a learning curve with processing this data as there is with any telescope system.

 

HA



#4 Hobby Astronomer

Hobby Astronomer

    Surveyor 1

  • *****
  • Posts: 1,896
  • Joined: 18 Dec 2013
  • Loc: Texas

Posted 16 May 2021 - 10:46 AM

It took me a little while to get something out of this data.

 

This is some ha data from maybe a year ago. I sorted though a mountain of M 57 subs and found 10 or so good ones to stack for this channel. I like the subs with the round stars.

 

Looks like this data can really be worked well if you figure it out. When I finish this up, this should look very nice.

 

At this stage of processing I have only done a decon, one light pass of ArcSIN, cloned the ArcSIN and pulled out the stars to make a mask for the inner ring, and boosted it again with the ArcSIN and POOF there are the outer rings of M57.

 

M57LPJPEG.jpg


Edited by Hobby Astronomer, 16 May 2021 - 11:45 AM.

  • Howie L, Mert, pfile and 1 other like this

#5 Mert

Mert

    Cosmos

  • *****
  • topic starter
  • Posts: 7,875
  • Joined: 31 Aug 2005
  • Loc: Spain, Pamplona

Posted 16 May 2021 - 01:10 PM

Very nice Mert! I hope your skies clear up soon, so you can get out and image. Are you still under lockdown?

Hi Mike,

 

Thanks for that, and the good news is we are allowed to travel again and

also no more curfew!!

This was almost 1 year long, horrible!!

Let's see if they also take away the clouds now! cool.gif

 

Stay well,

Mert


  • elmiko likes this

#6 Mert

Mert

    Cosmos

  • *****
  • topic starter
  • Posts: 7,875
  • Joined: 31 Aug 2005
  • Loc: Spain, Pamplona

Posted 16 May 2021 - 01:14 PM

Wow!

 

Very nice image. What did you think of all that data up there?

 

I wonder how far away all of those little galaxies are?

 

The scope is an F/3 system, almost as fast as a hyperstar set up but more forgiving.

 

Seems like there is a learning curve with processing this data as there is with any telescope system.

 

HA

Thanks HA smile.gif,

 

It does take time to find out how to handle this kind of data since

it is a super fast system with 2 meter diameter, that's some sort

of a lightbucket grin.gif

Anyway nice to be able to fiddle around with real professional data,

and of course my processing is not up to par with this but shrug.gif

 

Hope to be able to get out under dark skies again using the new

version 1.11 NINA to get things even better ( making autofocussing

every x frames history )

 

Stay well,

Mert


Edited by Mert, 16 May 2021 - 01:15 PM.

  • Hobby Astronomer likes this

#7 Hobby Astronomer

Hobby Astronomer

    Surveyor 1

  • *****
  • Posts: 1,896
  • Joined: 18 Dec 2013
  • Loc: Texas

Posted 16 May 2021 - 01:35 PM

It does take a bit to acquire the data here.

 

I have put together some pivot tables in excel from my data searches to see where there is enough data to put together decent channels to process an image with good resolution.

 

Looking at NGC6611 for example. There are 174 subs up there. If I can get maybe 5 nice subs with round stars in the various RGB Sloan and Bessel Filters, and 8-10 nice subs in HA to mix with an extracted artificial lum channel, a good quality image can be created.

 

Now the interesting thing here is this is free. The good data here is often on par or better than Itelescope or some of places that offer a hourly rental rate for big scopes with old cameras.

 

Access to this data also allows those of us that sometimes have cloudy skies to work on building our processing skills faster and working on interesting targets that our own scopes could never image at this resolution. I like this data much better than the Hubble Archives.

 

HA


  • dswtan likes this

#8 Mert

Mert

    Cosmos

  • *****
  • topic starter
  • Posts: 7,875
  • Joined: 31 Aug 2005
  • Loc: Spain, Pamplona

Posted 16 May 2021 - 01:43 PM

Not sure if I'm capable to make it work, lot of the work shared

in these archives is done with specific filters and low integration

times.

I'd like to try and combine different filters and map them to

some working color scheme and see what happens.

Personally I'm very grateful that this data is shared free!!

It also stroke me a bit to see that on some objects the total

integration time is close to nothing compared to what we are

used to do with our equipment.

At least myself I'm beginning the adventure to long(er) total

integration times now that automation has begun to function

great for me.

Backdraw for me is that I have a portable setup, so I have

to drive to my dark sites and stay there until I wake up in the

morning in my car.

But it's lot's of fun to do and makes you connect with it completely.

 

Stay well,

Mert


  • Hobby Astronomer likes this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics