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Deep Sky Colors - Astrophotography by Rogelio Bernal Andreo

The Surprise Nebula

19 Mar 2014, 02:45 UTC
The Surprise Nebula
(200 words excerpt, click title or image to see full post)

Back in 2010 I captured a widefield mosaic of the Rho Ophiuchus area that overtime became one of my "signature" deep sky images:

I captured that image with broadband filters - in plain language, I used filters that only pass the light within the rainbow colors, in other words the image shows what regular cameras usually capture.
A few days ago, checking some data and sky surveysm I noticed that in this area there were also some very clearly delimited nebulosity emitting light in the very narrow Hydrogen Alpha band that however were not showing in my original image - or in any other image of this area.
So, during the last few days I spent the last hours of the night capturing H-Alpha data in this area. I integrated this data with the previous image and voila:




Click here for a larger version
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The "new" emission nebulosity is most apparent, as you can see, in the left area of the image, particularly around the stars Delta Scorpii (SH2-7) and Pi Scorpii (SH2-1).
Visually, ...

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