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Astrophotography...
http://forum.celestialmatters.org/viewtopic.php?f=9&t=927
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Author:  t00fri [ Wed, 04-09-19, 13:13 GMT ]
Post subject:  Re: Astrophotography...

Hi Steffen,

nice to see you again around here after a while! M 27 looks really amazing. So I have to work hard to compete on the digital front :° .

Actually, we are not at all sleeping over in our GitHub repository for celestia.Sci. Some very interesting results have meanwhile been achieved, but we are not allowed yet to tell. Reason is a corresponding scientific paper being prepared for journal publication in parallel. Once the paper is accepted by the referee(s), the situation will change, of course.

Cheers,
Fridger

Author:  schreiberste [ Wed, 11-12-19, 11:52 GMT ]
Post subject:  Re: Astrophotography...

Hi,

no new picture from me for quite some time now - time to change that!
This is my latest attempt at imaging M33, the Triangulum Galaxy.
It's a stack of 90 images with 200 seconds exposure time each, so 5 hours of integrated light in total. More would of course be better, but the clouds just won't leave and nights with clear view are extremely rare. Hope you like it anyway!

Grüße,
Steffen

Attachments:
File comment: M33 Triangulum Galaxy
M33-Dreieck_2019-12_(90x200s_cal_drizbgx_rgreen_phcc_asinh_hist)_wqhd.jpg
M33-Dreieck_2019-12_(90x200s_cal_drizbgx_rgreen_phcc_asinh_hist)_wqhd.jpg [ 721.25 KiB | Viewed 2088 times ]

Author:  t00fri [ Wed, 11-12-19, 19:50 GMT ]
Post subject:  Re: Astrophotography...

Hi Steffen,

your M33 photo is simply GORGEOUS!

My celestia.Sci version is about OK, but somewhat too regular compared to your M33 photo...
[Click on image by all means]
Attachment:
Screenshot_20191211_204630.png
Screenshot_20191211_204630.png [ 416.72 KiB | Viewed 2078 times ]


Cheers,
Fridger

Author:  abramson [ Fri, 13-12-19, 23:55 GMT ]
Post subject:  Re: Astrophotography...

Love both.

Author:  schreiberste [ Fri, 27-03-20, 22:33 GMT ]
Post subject:  Re: Astrophotography...

I'm not sure if there's anyone here still interested in these images, but we are finally having clear nights here again, and I'm having a good time collecting light from these very distant things. So here comes another galaxy image: Caldwell 7, or NGC 2403, together with a lot of small background galaxies.
This one is a stack of 203 images, 200 seconds exposure each, i.e. a total integration time of ~11.2 hours.
Seeing conditions where not the best, and light pollution was bad as always...

Grüße and stay healthy!
Steffen

Attachments:
File comment: NGC 2403
NGC2403_2020-03_(203x200s_float)_4k.jpg
NGC2403_2020-03_(203x200s_float)_4k.jpg [ 1.44 MiB | Viewed 1230 times ]

Author:  LukeCEL [ Sun, 29-03-20, 2:45 GMT ]
Post subject:  Re: Astrophotography...

Steffen/schreiberste, nice picture!

Hope you're staying safe as well.

LukeCEL.

Author:  t00fri [ Sun, 29-03-20, 10:22 GMT ]
Post subject:  Re: Astrophotography...

Indeed!

Fridger

Author:  schreiberste [ Tue, 31-03-20, 9:25 GMT ]
Post subject:  Re: Astrophotography...

Thank you!

And there's one more: M106 and (many) friends.
338 images stacked, ~18,8 hours total integration time.

Grüße,
Steffen

Attachments:
File comment: M106 and friends
M106_2020-03_(338x200s_asinh_rgreen)_full.jpg
M106_2020-03_(338x200s_asinh_rgreen)_full.jpg [ 1.99 MiB | Viewed 1156 times ]

Author:  t00fri [ Wed, 01-04-20, 12:49 GMT ]
Post subject:  Re: Astrophotography...

Ah, very nice M 106 (and friends!)

Here comes the celestia.Sci view in the latest version of the (user programmable) dark window frame:
[By all means click on image for a bigger size!]
Attachment:
Screenshot_20200401_145831.png
Screenshot_20200401_145831.png [ 590.26 KiB | Viewed 1141 times ]


Enjoy, stay healthy!
Cheers,
Fridger

Author:  schreiberste [ Wed, 22-04-20, 6:05 GMT ]
Post subject:  Re: Astrophotography...

Can we see this in celestia.Sci?

This is galaxy group Hickson 44 or Arp 316 in Leo. Integrated 128 x 300s (~10,6h).
The galaxies are probably too tiny for my small telescope, but I still like the result.

Regards and stay healthy,
Steffen

Attachments:
File comment: Hickson 44 / Arp 316
Arp316_2020-04-20_(128x300s_bgx_phcc_asinh)-4k.jpg
Arp316_2020-04-20_(128x300s_bgx_phcc_asinh)-4k.jpg [ 643.09 KiB | Viewed 977 times ]

Author:  t00fri [ Wed, 22-04-20, 15:01 GMT ]
Post subject:  Re: Astrophotography...

schreiberste wrote:
Can we see this in celestia.Sci?

This is galaxy group Hickson 44 or Arp 316 in Leo. Integrated 128 x 300s (~10,6h).
The galaxies are probably too tiny for my small telescope, but I still like the result.

Regards and stay healthy,
Steffen


Again, I am entirely amazed by the high quality and color you are getting out even for dim DSOs! Fortunately, I also have the whole lot in the celestia.Sci database ;-). Here comes some comparison:

[By all means click on images for a bigger size!]
An enlarged portion of your shot:
Attachment:
Screenshot_20200422_164152.png
Screenshot_20200422_164152.png [ 246.34 KiB | Viewed 971 times ]


And now a screenshot of the same area and orientation:
Attachment:
Screenshot_20200422_164002.png
Screenshot_20200422_164002.png [ 227.71 KiB | Viewed 971 times ]


++++++++++++++++++++
NGC 3187 et al.: Note the good color matching (blue) along with proper space orientation. Same for all other visible galaxies... In celestia.Sci galaxies turn blue if B-V <~ 0.5.
NGC 3187 has even B-V ~ 0.34!
++++++++++++++++++++

I hope you are still "Corona safe" like we are, too, for the time being...

Greetings & stay healthy,
Fridger

Author:  schreiberste [ Wed, 22-04-20, 21:32 GMT ]
Post subject:  Re: Astrophotography...

Thank you, Fridger!

The shape of NGC 3187 can't be expected to be rendered correctly just from very limited catalog data, of course.
But indeed, the orientation with the two main arms seems to match quite perfectly! Also the colors look very good, though I can't be sure that my photo colors are "true", as I don't have any means of scientific color calibration. Usually, I start by color calibrating my images automatically from B/V star catalog data, and then fine-tune the mid-level colors a bit until the galaxies look natural.

Grüße,
Steffen

Author:  schreiberste [ Sun, 26-04-20, 15:56 GMT ]
Post subject:  Re: Astrophotography...

Hi,

Because of the many clear nights lately, I'm suffering from a severe lack of sleep. But on the other hand, these are very productive times for astrophotography ;)
This new image is of Markarian's Chain, which you surely know. It is stacked from 290 images of 200 seconds, i.e. ~16,1 hours integration time.

Hope you like it.
Grüße,
Steffen

Attachments:
File comment: Markarian's Chain
Markarjansche_Kette_2020-04_(290x200_float)_4k.jpg
Markarjansche_Kette_2020-04_(290x200_float)_4k.jpg [ 1.2 MiB | Viewed 880 times ]

Author:  t00fri [ Mon, 27-04-20, 16:40 GMT ]
Post subject:  Re: Astrophotography...

Ah, and another great multi galaxy configuration!
I think I have them all, too: Here is the screenshot:

[Don't forget clicking on the image for a bigger size]
Attachment:
Screenshot_20200427_183710.png
Screenshot_20200427_183710.png [ 245.03 KiB | Viewed 867 times ]


Actually, did you notice that the Astrophotography forum is among the most visited CM sites..As of now, 35355 reads!

Cheers & please continue with your nightly activities :°
Fridger

Author:  schreiberste [ Fri, 19-06-20, 8:52 GMT ]
Post subject:  Re: Astrophotography...

After so many galaxies lately, I decided to try something different this time. The "first-light" of my new second-hand 10" f/4 Newtonian telescope would be my first globular cluster, M13 in Hercules.
The nights are very short and cloudy now, so this is only a very short exposure (42 x 100s). At closer inspection you can still see some problems with collimation, which I'm hopefully going to improve for my next session. The f/4 system is much more sensitive than my old f/5 in this regard.
Anyway, I still like the result.

Best Regards,
Steffen

Attachments:
File comment: M13 - Hercules Globular Cluster
M13_2020-06-11_(42x100s_bgx_phcc_asinh_hist)_4k.jpg
M13_2020-06-11_(42x100s_bgx_phcc_asinh_hist)_4k.jpg [ 1.12 MiB | Viewed 132 times ]

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