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steppenwolf

M27 The Dumbbell Nebula in Ha - WIP

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Sadly, this project is currently stalled by the atrocious weather but at least I have had one uninterrupted night of imaging to start the ball rolling! I'm aiming for a bi-colour rendition combining Ha and OIII data at 3nm. I have a lot of data capture to go but it's a fair start.

Image Stats

Mount: Mesu 200
Telescope: Sky-Watcher Esprit 150 ED Pro
CCD Camera: QSI 683 WSG-8
Sampling: 1.04”/pixel
Guiding: OAG/LodeStar
Filter: Astrodon 3nm Ha
Exposure: 10 x 1800 sec
Date: 31/07/17
Calibration: Bias, Darks & Flats

Full Frame

598245c852520_Ha3nm_1800s_1x1_M27.thumb.png.7c0719d16b0b0bafce895b9b1dbcd74b.png
 

Cropped Frame

598244e874d5c_Ha3nm_1800s_1x1_M27_crop.thumb.png.fc64b4538a28c18eb4e5ecc63013178c.png

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That's looking great so far Steve - I'm pleased that you've got the Esprit 150 doing some work :) 

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Be nice to accentuate that striking outer region Steve. I've never managed to catch that from home, just not dark enough, but I have a sneaky feeling that one of these new fangled cmos cameras might provide the solution....

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10 hours ago, swag72 said:

I'm pleased that you've got the Esprit 150 doing some work :)

Getting there slowly but I have to say that I am delighted with this telescope.

9 hours ago, Tim said:

Be nice to accentuate that striking outer region Steve. I've never managed to catch that from home, just not dark enough, but I have a sneaky feeling that one of these new fangled cmos cameras might provide the solution....

That outer shell is very dim in my skies and a trial image binning 2 x 2 really didn't achieve much - although the KAF 8300 is not renowned for its binning abilities I didn't see the artefacts that some have reported. I really could do with better sky as there was high altitude moisture (again!) during this image run and this does rob the data of fine detail. Despite the binning proving disappointing, I may try some 1 hour exposures at 1 x 1 just to see if I can lift the outer shell from the background.

I'm watching the new generation CMOS devices with great interest as the results are very encouraging.

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@Tim Today, I reprocessed the image to enhance the outer shell a little and it shows more promise - I feel there is more to come as well:-

5984d19d8c57b_Ha3nm_1800s_1x1_M27_enhanced_1.thumb.png.7b9700720ff612fc21e29a2e5706f543.png

 

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That's a great start Steve, always have to get the calculator out to see that's 5 hours, those new fangled 3nm filters are working well, looking forward to the next stage.

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The outer shell looks great in the second image, we need more nights like the 31st.

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Exciting Steve :) I think you know planetaries are my favourite!

It's the Oiii you'll struggle with. This has the sharpest detail and most features in the outer regions, but as you know, you need great skies to get the best, no moon and top notch transparency. How often does that happen..........?

Just had cause to play with a couple of non cooled CMOS cameras ;), trying a cooled one atm. I see Atik have released their first, Steve C wasn't convinced about CMOS over CCD but they decided to give it a go. Will be interesting to see results.

 

As far as M27 goes, I have a gut feeling there is more to it, probably need an IR image from space, might be able to pick up something with couple hour CCD exposures, but I would be most surprised if there isn't more off to the right past the obvious outer region. Have never seen it, just got a feeling :)

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On 04/08/2017 at 21:23, Mick J said:

those new fangled 3nm filters are working well

They certainly give you some good flexibility at both capture and processing time - image in Ha during unfavourable Moon phases and start off with small stars, a good way to start!

On 04/08/2017 at 21:41, wxsatuser said:

we need more nights like the 31st

Oh, don't we just!

13 minutes ago, Tim said:

It's the Oiii you'll struggle with. This has the sharpest detail and most features in the outer regions, but as you know, you need great skies to get the best, no moon and top notch transparency. How often does that happen..........?

I want more Ha first but I'm looking forward to the challenge of the OIII - it should be revealing ......

15 minutes ago, Tim said:

Just had cause to play with a couple of non cooled CMOS cameras ;), trying a cooled one atm. I see Atik have released their first, Steve C wasn't convinced about CMOS over CCD but they decided to give it a go. Will be interesting to see results.

I'm watching these new cameras with some interest, I have to say - wish I could just dive in myself and experiment but I can't justify the cost at present.

16 minutes ago, Tim said:

As far as M27 goes, I have a gut feeling there is more to it, probably need an IR image from space, might be able to pick up something with couple hour CCD exposures, but I would be most surprised if there isn't more off to the right past the obvious outer region. Have never seen it, just got a feeling :)

M27 is slowly revealing its secrets, it is interesting to see the difference in images over the last five years. I did wonder if I would miss the NII in this one as I'm using such a narrow bandwidth but I'm relatively pleased with the result so far, just need more subs!

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