Hello All
Whilst the weather held and the Moon was down I managed to finish this shot of NGC4151 and some companions in Canes Venatici. Some people call NGC4151 The Eye of Sauron and I have posted a link to a proper image of this object in my Astrobin page for those interested.
Details of the shot here: https://www.astrobin.com/y3unj0/D/ (https://www.astrobin.com/y3unj0/D/)
This was taken through my usual tandem setup, 16hrs in total: 9hrs of L and 7hrs of RGB/OSC.
NGC4151, a mere 52 million ly away, is a prime exponent of a Seyfert galaxy with a massive black hole at its centre. Hubble looked at it back in 1997: https://hubblesite.org/contents/news-releases/1997/news-1997-18.html (https://hubblesite.org/contents/news-releases/1997/news-1997-18.html)
Roberto
(https://cdn.astrobin.com/thumbs/xomca38FaOpA_16536x0_85166Htd.jpg)
See the annotated image here for the numerous PGC galaxies peppering the background:
(https://cdn.astrobin.com/thumbs/3VCPGXsvnI1f_2560x0_0nse9Boz.jpg)
I have already liked this on Astrobin Roberto.
Carole
Nice 👌
Clear Skies
GW
Lovely processing as usual and a great image. I really like the way you process the background, it seems to bring out the best in the details.
Robert
Thank you All.
Robert, the background may actually be "too flat" because I had to construct a synthetic flat and apply it after calibration. There were high clouds and the usual London LP combined for quite a few of the shot and the masters to end with heavy gradients.
Roberto
Nice round stars that are not saturated at 300' and 600' (had a look at your Astrobin data). Brilliant. Have you tried the normalize scale gradient script on PI to deal with the gradients. Seems to be working well.
CS
G
Hi Garrick
Thank you. Yes, I've been using NSG since it launched in 2020. John Murphy is a top guy. This routine before integrating the masters is a must for light polluted skies like ours.
Roberto