M33 visual
Posted: Mon Nov 28, 2022 9:03 pm
Hi All,
lately there have been a few nights with a few clear hours here at my location. I used them to capture some photons of M33. Don’t know, if it’s worth sharing, but anyway here it is:
- 200/1000 GSO Newtonian / SkyWatcher EQ-5
- Baader MPCC
- UV / IR cut filter
- EOS 2000Da, APT
- 50/200 Guide Scope, ASI 120 MC, PHD2
- 110 x 30s + 90 x 60s @ ISO 800 (~ 2.4 hours)
- flats, darks, bias
- ASTAP
This was the first time that I combined data of two nights. Temperature dropped below 0 degrees and there was ice on the scope and even on the screen of the notebook. My intention was to capture some Ha as well and to use it with NBAccent module, but I had no luck with the weather here up to now. And the forecast for the next days doesn’t look fine. Maybe next year …
I tried to do the rendition like Ivo did with the dataset of the Ikarus Observatory project and with the M33 example in the documentation of the NBAccent module:
viewtopic.php?t=2148
https://www.startools.org/modules/narrowband-accents
I read, this poor galaxy passed M31, was mixed up and therefore it now looks like the way it does. Not easy to process. In Contrast module, I pushed Locality to bring out the remainders of the spiral structures. The HDR module did a fine job to reveal the disrupted dust lanes near the centre. Sharp was not used, as signal is too weak and noisy. But … yes … again: SVDecon did an awesome job! It revealed stars in NGC 604, that have not been visible before:
I took a closer look at Ivo’s rendition of the IKO dataset and I think, Super Structure and NR was used only in a very conservative way. So I omitted Super Structure and in NR I reduced ‘Brightness Detail Loss’ quite a bit. I’m not sure what is real detail and what noise, and I guess my visual cortex generates detail where probably nothing exists. 
Oh and yes I used Guy’s fine STReplay tool quite a lot to work out many tweaked versions. I will not stop to promote it until everybody here uses it!
Comments welcome. Would it still be better to apply stronger noise reduction or even to use the Super Structure module?
Thanks & best regards, Dietmar.
P.S.: @Mike – thanks for lessons in American English and sports. I did my homework. But of course, the ‘Hail Mary’ and ‘far out in left field’ was not too much of a challenge for me And if you ever feel the need to have a ‘Schieberegler’, please contact me. I must still have some, somewhere in boxes full of electronic parts from the 80s and 90s. 
lately there have been a few nights with a few clear hours here at my location. I used them to capture some photons of M33. Don’t know, if it’s worth sharing, but anyway here it is:
-
- m33_2d_1-2.jpg (545.72 KiB) Viewed 3092 times
- Baader MPCC
- UV / IR cut filter
- EOS 2000Da, APT
- 50/200 Guide Scope, ASI 120 MC, PHD2
- 110 x 30s + 90 x 60s @ ISO 800 (~ 2.4 hours)
- flats, darks, bias
- ASTAP
This was the first time that I combined data of two nights. Temperature dropped below 0 degrees and there was ice on the scope and even on the screen of the notebook. My intention was to capture some Ha as well and to use it with NBAccent module, but I had no luck with the weather here up to now. And the forecast for the next days doesn’t look fine. Maybe next year …
I tried to do the rendition like Ivo did with the dataset of the Ikarus Observatory project and with the M33 example in the documentation of the NBAccent module:
viewtopic.php?t=2148
https://www.startools.org/modules/narrowband-accents
I read, this poor galaxy passed M31, was mixed up and therefore it now looks like the way it does. Not easy to process. In Contrast module, I pushed Locality to bring out the remainders of the spiral structures. The HDR module did a fine job to reveal the disrupted dust lanes near the centre. Sharp was not used, as signal is too weak and noisy. But … yes … again: SVDecon did an awesome job! It revealed stars in NGC 604, that have not been visible before:
-
- ngc604.gif (18.66 KiB) Viewed 3092 times
Oh and yes I used Guy’s fine STReplay tool quite a lot to work out many tweaked versions. I will not stop to promote it until everybody here uses it!
Comments welcome. Would it still be better to apply stronger noise reduction or even to use the Super Structure module?
Thanks & best regards, Dietmar.
P.S.: @Mike – thanks for lessons in American English and sports. I did my homework. But of course, the ‘Hail Mary’ and ‘far out in left field’ was not too much of a challenge for me
And if you ever feel the need to have a ‘Schieberegler’, please contact me. I must still have some, somewhere in boxes full of electronic parts from the 80s and 90s. 
And I used STReplay just this morning, trying to get myself through the Flaming Star up to the Color module so I can make changes there. Unfortunately I made some kind of mistake...but I'll try again.
(Sorry, I couldn't resist 
) - Of course not, a touch of green on top and things instantly look much better.