geeklee

On 11/05/2024 at 13:51, DaveS said:

This is definitely Work In Progress, and is a placeholder for next year

Great to see some significant detail that these have to offer Dave.  And even smaller galaxies coming through as well that would barely register or being about a pixel on a shorter focal length.  Nice one.

I've imaged narrowband in nautical darkness before and been happy enough with the results.  Never tried broadband though - I'm interested how this compares.  I'm good with a a fairly small moon far away from an object in broadband but even then I try and choose wisely... although that sounds like there are plenty of clear nights and picking makes any difference 🤣

We'll be exiting nautical dark soon, sadly. 

1 hour ago, WolfieGlos said:

I captured 2 hours in the last Full Moon for a laugh, and it really didn't add anything to the image at all. It's not a process I'm overly familiar with having only followed a video for that attempt, so it might be a lack of knowledge/experience too.

I had a few attempts myself and still couldn't bring the full Ha signal through - although it did enough to enhance things.  Here was the Ha:

In the end I used the Continuum subtraction method but with some masking as well at the end as I couldn't get a great result.  It was only 4h Ha though (6nm, 533MM)

23 hours ago, WolfieGlos said:

M106

They are both excellent Chris.  Really good colour and detail on M106 and you can just start to see the Ha regions popping out, including the fainter stuff.

I recently shot this with my 150P-DS and some Ha helped even though it wasn't much.  If you can get a lot - it reveals some really great structures.

13 hours ago, cfinn said:

target M101

Fantastic work so far Charles.  The detail is excellent, especially on NGC 5474 - usually a bystander.  Good luck with any future plans for colour.

11 minutes ago, david_taurus83 said:

Single Ha sub of 5 mins and Lum sub at 60s.

That close up, FOV is crazy David, awesome   Is that still with the reducer?  Hope you get something before summer arrives.

Seeing it on the AZEQ6 has me reconsidering looking at one of these - it's (unsurprisingly) still a bit of a beast all in!  

8 hours ago, WolfieGlos said:

Final process

Another very good revision Chris - they've definitely all had their clear merits, with an incremental change along the way. I do prefer the colours here although just personal preference.  Great job with the tidal tail on NGC 3628.

Any other commentary & feedback is just of the pixel peeping variety - I won't bore you with that  

12 hours ago, tomato said:

It’s a great image and an ideal FOV for this region. I would love to cover this area with my Esprit 150 rig but I’d need at least 12 panels…

Thanks Steve.  Only 12?  Even using copious binning/resampling to keep the integration down, it would be a hell of a task bringing it altogether.  The gradients alone would likely drive me to despair.  Still, 2 or 3 panels a year maybe? 😉

6 hours ago, WolfieGlos said:

I'll have to find out how to do this 😉

Thanks Chris.  I scripted into Simbad (I say scripted, it was minimal) a query for every quasar found by TypeCat.  Brought this data back into Excel and did some cell work to generate a new custom catalogue that included the red shift values in the "name".  Once I had this, I created an annotated image and iterated over this process, removing all quasars from the catalogue file below a redshift where I had something in the image.  Then created another annotated image with the latest list and did the same again, and again...

TypeCat can be found among the script set here if you don't already have it.  QSO is the designation to look for in the list.

In AnnotateImage, you can add ("+") a custom catalogue where you point to the output from TypeCat or just a text file you've created yourself (tab delimited).  You can create all sorts of custom annotations this way.

1 hour ago, Icesheet said:

it may be a case of don’t fix what isn’t too broken!

The better quality the data that goes in, the better result out but there is a limit (our own limit!) with limited clear sky time.  I try and get it the best I can with no glaring issues. 

1 hour ago, Icesheet said:

Just out of curiosity, how long has your collimation held?

I collimated in Sep/Oct last year and haven't touched it since.  While my imaging rig (scope+camera etc) stays together, I do have to setup and tear down onto the mount each time I image.

Hope you get a chance before we're into summer - look forward to seeing your results.

On 20/04/2024 at 11:50, wimvb said:

For H-alpha and red combination, I tried something new. I created an HaRR image with channel combination in PI, and colour calibrated that with the standard colour calibration process. Then I merged the red channel of this image with an RGB image. It took a bit of tweaking, but the result looks pleasing.

That's a great revision Wim - the Ha less prominent, but overall a step up in many areas.

Interesting approach for Ha combination you've listed above, I will try and keep a note of this to try myself - thanks for sharing.

My continuum subtraction attempts have been mixed - my latest one I ended up masking in the final step to help in the places I wanted it.  A little unorthodox.

Hi @Icesheet - mine isn't perfect but I think you should try and get that secondary blot more centralised, then get everything in line again.  Also, to my eye the central black disc is just a little to the top left, with a wider white annulus to the lower right.. slightly.  

I agree with your assessment of the field though.  Nothing there BlurX wouldn't tidy up easily.

Probably worth giving it a go as is if you don't want to fiddle any more for now.  See how an integrated stack looks and processes.

4 minutes ago, DaveS said:

Amazing image! My current FoV just about encompases the Eyes!

Thanks Dave.  That's funny you mention your FoV - I remember admiring one of your recent images this week and had wondered just what that FoV would be in this area  

3 hours ago, Adreneline said:

This is clever stuff Lee - the defaults in PI Image Solve & Annotate can be overwhelming! Another great job joining all four panes - seamless integration and a perfect background - to my eyes!

Thanks Adrian - I hope I pulled the information together correctly.

38 minutes ago, Ags said:

What do you use to stitch the panes together?

Thanks Agnes.  I used AstroPixelProcessor (APP).  It usually deals with mosaics very well.  I prepared each pane (cropped, gradient removal) then combined.  Three separate sessions had created some annoying gradients - particularly in two panes where I had to be careful in processing and just about got away with it!

19 minutes ago, ONIKKINEN said:

An absurd number of galaxies, great image!

Thanks Oskari.  It's easy pickings in this area but I think there's just enough integration to pull out a huge variety of galaxies and give that feeling of a really populated field.

Captured over 3 nights (in February 2024 and March 2024), this is a four pane mosaic of the Virgo cluster.  ~14 hours across the four panes with my Epsilon 130D and 2600MC Pro.  

So much to enjoy when browsing the full size image.  Some more chat/info in the Deep Sky Imaging thread here

Annotated version if you want to look anything up after browsing around the primary image.

Possibly like others, I've been waiting to see if I'd get any more moonless astro dark nights, but that's it here!

On one hand this is a little in no man's land - not quite deep enough due to being a mosaic in the UK  and not a lot of focal length for close up detail.  What I hope it does showcase is an enjoyable view into the Virgo cluster.  

It's a four pane mosaic taken with my Epsilon 130D and 2600MC Pro - around 14 hours spread evenly across the four panes and three sessions - 07Feb24, 15Mar24, 30Mar24.  Captured with NINA, pre-processed in APP and processed in PixInsight.

Throughout this image there are so many galaxy sizes and types.  Some clear with structure, others just coming out of the background.  I have spent a lot of time just scouring back and fourth!

My favourite is probably IC3481, IC3481a (PGC41646) and IC3483 (centre bottom).  These appear to have some form of interaction but if I understand what I've read (and it's still accepted today) IC3483 is a foreground galaxy and it's just a coincidence that it lines up.  I was drawn to this small group as the supposed interaction was just about coming out the noise with a little time, but after a few hours it was still faint but easier to distinguish.

TypeCat in PixInsight had 1,369 Quasars listed in this field.  On closer inspection a lot had nothing visible to my eye.  I trimmed down this list and scripted some simple output from Simbad until I had the four with the highest redshift (z) that were visible.  I created a custom catalogue (yellow) which shows their designation, redshift and Light Travel Time.  Sadly I didn't break 12 Gyrs this time, but it isn't really that much integration. Fascinating working through this and I hope it's correct.

Here, it's reduced to 75% of its original size - do click through to open fully.  Thanks for looking.

The annotated version if you want to look something up:

13 hours ago, AstroNebulee said:

Sky 8 secs at 800iso f2.8 (should of gone higher on the iso but didn't want moon to wash the sky out, sadly I got it wrong) 

Foreground 30 secs 1600iso F4 with long exposure noise reduction. 

Great results Lee and well worth sticking it out after 11pm.  The timelapse is fantastic.

51 minutes ago, Adreneline said:

NGC7023 rises above 30 degrees just after astro darkness begins, followed by IC1396 at around about 02.00.

Excellent contrasting pair Adrian.  It's interesting seeing the Iris pop up already just before the light nights of summer.  Very nice colour and detail in the core against an attractive star field.

I just need to get all that dust off my desk from the IC1396 image, it's covered in it  

10 hours ago, WolfieGlos said:

Starfield 102 with the 585mc.

Fantastic result Chris.  The slightly smaller pixels of the 585MC shining through in this combo to give the tools more to work with.

Excellent Steve and very clear interaction and structure showing with the data so far.  Nice subtle colour too.

21 minutes ago, pipnina said:

quite pleased with the result

Fantastic result - good colour contrasts and lovely detail.  No wonder you're pleased! 👍☺️

On 09/03/2024 at 20:54, GalaxyGael said:

Epsilon looks to be singing.

Thanks Colm, good to hear from you.  With weather and a few other things getting in the way, it's only been the last 6-7 months I've had a chance to really get it going - hoping to stretch its legs further later in the year (still have a couple of unfinished projects from this year too).

23 hours ago, Roy Foreman said:

Well done.

Thanks Roy ☺️

1 hour ago, WolfieGlos said:

Sorry if that came across in a negative tone mate, that wasn’t the intention at all 👍 

Not at all Chris, all good 👍 👍

9 hours ago, WolfieGlos said:

Seem to have stirred quite a discussion, and not about my image sadly ......

Apologies Chris, I'm dropped you a PM instead of continuing the SY spacing stuff here.

2 minutes ago, Elp said:

I'm saying my lenses focal point is no where near that point. Without filters it is.

Do you compensate for the filters though?  At 44mm (like a DSLR) it will focus (on stars) under the "L".  If you add a filter, you need to add more spacing so it will then naturally push the focus point back under the L to compensate for the change in light path (due to the filter thickness).

I realise we all have different standards & quality measures though 👍