Celestial hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  IC 131  ·  IC 132  ·  IC 133  ·  IC 135  ·  IC 136  ·  IC 137  ·  IC 142  ·  IC 143  ·  M 33  ·  NGC 588  ·  NGC 592  ·  NGC 595  ·  NGC 598  ·  NGC 604  ·  Triangulum Galaxy  ·  Triangulum Pinwheel
M33 - The Triangulum Galaxy, DanielZoliro

M33 - The Triangulum Galaxy

M33 - The Triangulum Galaxy, DanielZoliro

M33 - The Triangulum Galaxy

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Description

I learned two important lessons with this data set.

1. Don't forget to take your flats!!!

2. Flats from other data sets can work!

I forgot to get my flats for this data. This proved to be a huge problem when processing with Pixinsight. My Hyperstar rig has severe vignetting without flats. Now I've processed a couple of other data sets from my Hyperstar rig without using flats, but I was able to correct the problem using DBE. I tried over and over to use DBE to correct the vignetting on this one, but couldn't get it to work. I tried using symmetries and multiple passes, but just could not get it to work. I think the biggest reason is that big bright galaxies like M33 are already bright in the center of the galaxy, so DBE could not correct the vignetting without completely screwing up the natural brightness at the center of the galaxy.

So this data sat on my computer for a couple months until I finally tried restacking it using calibration frames from another data set. It worked beautifully. I understand that this is not the best option. Any dust motes that are different between the data sets will not be properly fixed. but it worked in a pinch and allowed me to finally process this beauty!

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M33 - The Triangulum Galaxy, DanielZoliro