wimvb Posted November 18, 2019 Share Posted November 18, 2019 While clouded in and waiting for knee surgery, I started playing with data from the Liverpool Telescope (http://telescope.livjm.ac.uk/). I downloaded all the NSO data on NGC 2841, a very nice flocculent galaxy in Ursa Major, and started processing in PixInsight. While I couldn't get anywhere with the colour of this galaxy, the luminance created from the combined filters revealed structures that I've never seen before in an image of this galaxy. I combined a colour image of NGC2841 with an inverted superstretch of the combined SDSS-r, Bessell-V, and Bessell-B filters. RGB image: Red: 35 frames SDSS-r' Green: 16 frames Bessell-V Blue: 20 frames Bessell-B L image: integration of all 71 frames, approximately 100 minutes total exposure time. Field size: roughly 10 x 10 arcminutes. The arrow points at a weak loop, and the circle shows a slight density increase in the weak structure. 3 Link to comment Share on other sites More sharing options...
Rodd Posted November 19, 2019 Share Posted November 19, 2019 (edited) Interesting. Without the non inverted image though its hard to tell what these features might be. Obviously you feel they are not the typical edges of normal galaxy features--but that is a tough one without the regular image Rodd Edit: I see now the regular image inside the oval--it would still be good to see the normal image of teh areas in question though--definitely not the edge of the disc, though Edited November 19, 2019 by Rodd Link to comment Share on other sites More sharing options...
wimvb Posted November 20, 2019 Author Share Posted November 20, 2019 I just stumbled across this article by the Dragonfly team https://scholar.google.com/scholar?start=20&q=Ngc2841+galaxy&hl=sv&as_sdt=0,5#d=gs_qabs&u=%23p%3DWjSypV0skbIJ It seems that the structures extend a lot further out than what is visible in the 100 minutes exposure that I processed. Cool! I wonder how deep amateur gear would allow one to image this object. Maybe a challenge for galaxy season? 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now