M31 Just Not Right

[dhellis59]

Hi All,

I have been struggling with this data for quite some time. It was taken from my driveway in a red/white zone. This is my latest effort:

This is the data if anyone wants to give it a try and share how they got their result:

https://onedrive.live.com/redir?resid=9 ... file%2cfts

[dhellis59]

I don't know if I'm missing something with my captures; or I have too much light pollution; or I'm just not processing it correctly.

Here is my workflow:

StarTools 1.4.312
Tue May 03 09:59:37 2016
-----------------------------------------------------------
File loaded [C:\Users\Darryl\Pictures\Astronomy\Astrophotography\APT_Images\Camera_1\Lights\M31\M31 050216 68 Lights 34 Darks 59 Flats 34 Bias..fts].
---
--- Crop
Parameter [X1] set to [122 pixels]
Parameter [Y1] set to [433 pixels]
Parameter [X2] set to [3612 pixels (-678)]
Parameter [Y2] set to [2595 pixels (-261)]
--- Bin
Parameter [Scale] set to [(scale/noise reduction 70.71%)/(200.00%)/(+1.00 bits)]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [Yes]
Parameter [Precision] set to [512 x 512 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [98 %]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [Yes]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [75 %]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [No]
Parameter [Precision] set to [512 x 512 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [98 %]
File loaded [C:\Users\Darryl\Pictures\Astronomy\Astrophotography\APT_Images\Camera_1\Lights\M31\M31 050216 68 Lights 34 Darks 59 Flats 34 Bias..fts].
---
--- Bin
Parameter [Scale] set to [(scale/noise reduction 70.71%)/(200.00%)/(+1.00 bits)]
--- Crop
Parameter [X1] set to [169 pixels]
Parameter [Y1] set to [242 pixels]
Parameter [X2] set to [2424 pixels (-609)]
Parameter [Y2] set to [1858 pixels (-161)]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [Yes]
Parameter [Precision] set to [512 x 512 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [98 %]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [0.90]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [91.32 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
--- Contrast
Parameter [Expose Dark Areas] set to [Yes]
Parameter [Compensate Gamma] set to [Yes]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [4 pixels]
Parameter [Aggressiveness] set to [75 %]
Parameter [Dark Anomaly Headroom] set to [15 %]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Optimize Soft]
Parameter [Dark/Bright Response] set to [Full]
Parameter [Detail Size Range] set to [21 pixels]
Parameter [Strength] set to [1.0]
--- Wavelet Sharpen
Parameter [Intelligent Enhance] set to [Yes]
Parameter [Scale 1] set to [100 %]
Parameter [Scale 2] set to [100 %]
Parameter [Scale 3] set to [100 %]
Parameter [Scale 4] set to [100 %]
Parameter [Scale 5] set to [100 %]
Parameter [Mask Fuzz] set to [8.0 pixels]
Parameter [Amount] set to [100 %]
Parameter [Small Detail Bias] set to [75 %]
--- Deconvolution
Parameter [Image Type] set to [Deep Space]
Parameter [Mask Behavior] set to [De-ring Mask Gaps, Hide Result]
Parameter [Radius] set to [1.5 pixels]
Parameter [Iterations] set to [6]
Parameter [Regularization] set to [1.00 (optimal noise and detail)]
Parameter [Mask Fuzz] set to [8.0 pixels]
--- Fractal Flux
Parameter [Brightness Mask Mode] set to [Off]
Parameter [Algorithm] set to [Add Detail]
Parameter [Negative Flux] set to [0 %]
Parameter [Positive Flux] set to [25 %]
Parameter [Detail Filter] set to [2.5 pixels]
Parameter [Filter Fuzz] set to [1.0 pixels]
Parameter [Filter Radius] set to [1.5 pixels]
Parameter [Filter Amount] set to [200 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Brightness Mask Power] set to [1.00]
--- Life
Parameter [Detail Preservation] set to [Min Distance to 1/2 Unity]
Parameter [Compositing Algorithm] set to [Screen]
Parameter [Inherit Brightness, Color] set to [Off]
Parameter [Output Glow Only] set to [No]
Parameter [Airy Disk Sampling] set to [128 x 128 pixels]
Parameter [Airy Disk Radius] set to [8 pixels]
Parameter [Glow Threshold] set to [5 %]
Parameter [Detail Preservation Radius] set to [20.0 pixels]
Parameter [Saturation] set to [50 %]
Parameter [Strength] set to [100 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
--- Color
Parameter [Cap Green] set to [No]
Parameter [Bias Slider Mode] set to [Sliders Reduce Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [Straight CIELab Luminance Retention]
Parameter [Dark Saturation] set to [2.00]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [200 %]
Parameter [Blue Bias Reduce] set to [1.00]
Parameter [Green Bias Reduce] set to [1.10]
Parameter [Red Bias Reduce] set to [1.16]
Parameter [Mask Fuzz] set to [1.0 pixels]
--- Wavelet De-Noise
Parameter [Scale 1] set to [90 %]
Parameter [Scale 2] set to [90 %]
Parameter [Scale 3] set to [90 %]
Parameter [Scale 4] set to [90 %]
Parameter [Scale 5] set to [0 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [6]
Parameter [Color Detail Loss] set to [12 %]
Parameter [Brightness Detail Loss] set to [12 %]
Parameter [Grain Size] set to [4.5 pixels]
Parameter [Read Noise Compensation] set to [Off]
Parameter [Smoothness] set to [75 %]
File saved [C:\Users\Darryl\Pictures\Astronomy\Astrophotography\APT_Images\Camera_1\Lights\M31\M31 050216 68 Lights 34 Darks 59 Flats 34 Bias..jpg].

Thanks for any help provided.

Darryl

[Cheman]

I had to keep cropping to try to remove stacking artefacts and dont think I got it all, but here is my result.
Che

M31 050216 68 Lights 34 Darks 59 Flats 34 Bias (Small).jpg (72.57 KiB) Viewed 5926 times

---
--- Crop
Parameter [X1] set to [75 pixels]
Parameter [Y1] set to [352 pixels]
Parameter [X2] set to [3648 pixels (-642)]
Parameter [Y2] set to [2616 pixels (-240)]
--- Bin
Parameter [Scale] set to [(scale/noise reduction 70.71%)/(200.00%)/(+1.00 bits)]
--- Crop
Parameter [X1] set to [50 pixels]
Parameter [Y1] set to [58 pixels]
Parameter [X2] set to [2418 pixels (-108)]
Parameter [Y2] set to [1501 pixels (-99)]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [Yes]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [2 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [159 %]
Parameter [Aggressiveness] set to [80 %]
--- Crop
Parameter [X1] set to [48 pixels]
Parameter [Y1] set to [62 pixels]
Parameter [X2] set to [2319 pixels (-49)]
Parameter [Y2] set to [1392 pixels (-51)]
--- Wipe
Parameter [Mode] set to [Correct Color & Brightness]
Parameter [UNKNOWN] set to [Yes]
Parameter [Precision] set to [256 x 256 pixels]
Parameter [Dark Anomaly Filter] set to [1 pixels]
Parameter [Drop Off Point] set to [100 %]
Parameter [Corner Aggressiveness] set to [100 %]
Parameter [Aggressiveness] set to [78 %]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [84.48 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
--- Life
Parameter [Detail Preservation] set to [Linear Brightness Mask]
Parameter [Compositing Algorithm] set to [Multiply, Gamma Correct]
Parameter [Inherit Brightness, Color] set to [Off]
Parameter [Output Glow Only] set to [No]
Parameter [Airy Disk Sampling] set to [128 x 128 pixels]
Parameter [Airy Disk Radius] set to [8 pixels]
Parameter [Glow Threshold] set to [0 %]
Parameter [Detail Preservation Radius] set to [20.0 pixels]
Parameter [Saturation] set to [100 %]
Parameter [Strength] set to [85 %]
Parameter [Mask Fuzz] set to [38.1 pixels]
--- Deconvolution
Parameter [Image Type] set to [Deep Space]
Parameter [Mask Behavior] set to [De-ring Mask Gaps, Hide Result]
Parameter [Radius] set to [2.7 pixels]
Parameter [Iterations] set to [6]
Parameter [Regularization] set to [1.00 (optimal noise and detail)]
Parameter [Mask Fuzz] set to [8.0 pixels]
--- HDR
Parameter [Small Detail Precision] set to [Max]
Parameter [Channels] set to [Brightness Only]
Parameter [Algorithm] set to [Reveal DSO Core]
Parameter [Dark/Bright Response] set to [Full]
Parameter [Detail Size Range] set to [137 pixels]
Parameter [Noise Suppression] set to [Off]
--- Develop
Parameter [White Calibration] set to [Use Stars]
Parameter [Gamma] set to [1.00]
Parameter [Skyglow] set to [0 %]
Parameter [Digital Development] set to [85.60 %]
Parameter [Blue Luminance Contrib.] set to [100 %]
Parameter [Green Luminance Contrib.] set to [100 %]
Parameter [Red Luminance Contrib.] set to [100 %]
Parameter [Dark Anomaly Headroom] set to [5 %]
Parameter [Dark Anomaly Filter] set to [Off]
--- Color
Parameter [Cap Green] set to [No]
Parameter [Bias Slider Mode] set to [Sliders Reduce Color Bias]
Parameter [Style] set to [Scientific (Color Constancy)]
Parameter [LRGB Method Emulation] set to [Straight CIELab Luminance Retention]
Parameter [Dark Saturation] set to [2.00]
Parameter [Bright Saturation] set to [Full]
Parameter [Saturation Amount] set to [262 %]
Parameter [Blue Bias Reduce] set to [1.00]
Parameter [Green Bias Reduce] set to [1.02]
Parameter [Red Bias Reduce] set to [1.08]
Parameter [Mask Fuzz] set to [1.0 pixels]
--- Wavelet De-Noise
Parameter [Scale 1] set to [90 %]
Parameter [Scale 2] set to [90 %]
Parameter [Scale 3] set to [90 %]
Parameter [Scale 4] set to [90 %]
Parameter [Scale 5] set to [0 %]
Parameter [Mask Fuzz] set to [1.0 pixels]
Parameter [Scale Correlation] set to [3]
Parameter [Color Detail Loss] set to [12 %]
Parameter [Brightness Detail Loss] set to [12 %]
Parameter [Grain Size] set to [4.5 pixels]
Parameter [Read Noise Compensation] set to [Off]
Parameter [Smoothness] set to [75 %]
File saved [C:\Users\Che\Downloads\M31 050216 68 Lights 34 Darks 59 Flats 34 Bias.jpg].

[dhellis59]

Thanks Cheman. I was hoping you would jump on this one also. So, it was the stacking artifacts that kept me from getting rid of the noise(??) around the perimeter of M31? I couldn't tell what was noise and what was nebulosity.

So then, despite capturing almost 2 hours of data, I still need more, lots more, to fill in all of the nebulosity and detail of M31? Your image looks great, but I was hoping I had more of both.

How would you recommend I improve the image?

Thanks,

Darryl

[Cheman]

Hi Darryl
I'm not entirely sure if it was the stacking artifacts or not. The only way I could smooth it out was to use life-isolate with a mask around the galaxy. I am by no means a Startools expert, and am more familiar with processing my own data and its quirks. did you take images on different nights as your stacked image seemed to have many different framings leading to the stacked image needing to be cropped a lot. I think you have more details that could come out in the processing, but I was limited in time and didn't push it. Its also possible there is something going on with your flats, I'm not really sure. Maybe Ivo can have a look, or one of the others that chime in here. As for 2 hours of data, well, more always seems to be better We cant really compare apples to apples here because of different equipment and such, but my image of this was 8 hours of data using 10 minute subs. http://astrob.in/123053/E/

[dhellis59]

Now that's the M31 I'm after! Data, among other things like skills, equipment, dark clear skies, and time!

Yeah, between clouds, equipment failures, mistakes coupled with a steep learning curve, it took many different sessions to put the data together which is the reason for so many different sets of frames. By the time I started sorting things out M31 was too far past the trees to get good subs...no excuses.

Nice image!