Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 97  ·  NGC 3587  ·  Owl Nebula  ·  PGC 2479429  ·  PGC 2479466  ·  PGC 2481387  ·  PGC 2482280  ·  PGC 2483306  ·  PGC 2489233  ·  PGC 2490291  ·  PGC 2490640  ·  PGC 2493264  ·  PGC 2494570  ·  PGC 2496406  ·  PGC 34279
M 97 Owl Nebula, Michael Timm
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M 97 Owl Nebula

M 97 Owl Nebula, Michael Timm
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M 97 Owl Nebula

Equipment

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Description

A lot went wrong this evening. Autoguiding was terrible until i performed the meridian flip. After the flip guiding was very smooth. The next day i tried to track down the problem but was not very successful. It seems that the scope was not well balanced - or there is some sort of mechanical problem in the northeast?

Whatever, another problem occured: Something is terrible wrong with my flats. They inject a lot of noise into the image (remember the 'annoying-noise-blob' i tried to track down in february?). The reason for this noise is unknown to me, but it is clear that the flats are the source. Maybe i will upload an image of a noised flat later.

[Edit]: I uploaded an image called "The 'annoying-noise-blob', so if you want to see it in it's full splendor just take a look :-)

Nevertheless the image is much better than my first owl nebula a year ago - no wonder, the ASI294 Pro is superior to the uncooled ASI178MC i used back than. And i had to stop imaging after an hour or so due to an incoming flu i got last year. So all in all i improved my M 97 in my personal collection. Maybe i'll be back next year, hoping that i know how to take flats properly :-)

[Edit] I reprocessed the image with my new darks (taken in a refrigerator), without bias and with flats from february. Seems to be better, i think.

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  • M 97 Owl Nebula, Michael Timm
    Original
  • Final
    M 97 Owl Nebula, Michael Timm
    B

B

Description: Reprocessed with new darks, without bias and working flat.

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M 97 Owl Nebula, Michael Timm