NIGHT OVER ONTARIO

These photos were taken by Lynn Hilborn of Grafton, Ontario.
Pictures have appeared on the cover and inside editions of SkyNews magazine and in Sky & Telescope and Astronomy magazine, and as NASA's Astronomy Picture of the Day.

“ Had I the heavens' embroidered cloths,
Enwrought with golden and silver light,
The blue and the dim and the dark cloths
Of night and light and the half light,”
W.B.Yeats

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The 'Angel Nebula' (Integrated Flux Nebula - IFN). I only know of 3 other images of this object. Captured with a Canon 200mm f2.8 lens and FLI ML 8300 camera with a total 9 hours of exposure. Taken on April 12 and 13, 2012 by Lynn Hilborn, WhistleStop Obs, Grafton,Ontario. Central star is HIP51521 about 4.5 degrees from M82.<br />
As noted astrophotographer Rogelio Bernal Andreo writes...<br />
in simple terms, the IFN is dust clouds. However, unlike most known nebulae, they do not reflect, <br />
scatter or fluoresce due to the radiation of any individual star or cluster of stars, but do so <br />
from the integrated flux of all the stars in the Milky Way Galaxy. In other words, the IFN is <br />
illuminated by the glow of our own galaxy.<br />
Because the IFN is so faint, capturing it is a challenge, as even under good skies it will sit barely above the noise. This means that once you've captured the data and try to bring the signal from the IFN, you will bring it along with the noise in the image, making it almost impossible to discern between noise and nebulae. This is the main reason most images won't show any or almost any IFN - as astrophotographers deal with the noise - trying to make it dissapear - the IFN will dissapear with it. The IFN is relatively faint and not very well studied. . In addition to the blue hue characteristic of reflection nebulae, the galactic cirrus also emits a faint reddish glow as UV light from the Milky Way’s stars is absorbed and re-emitted in the red spectrum. Text with the kind permission of Rogelio Bernal Andreo (DeepSkyColors.com)

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The 'Angel Nebula' (Integrated Flux Nebula - IFN). I only know of 3 other images of this object. Captured with a Canon 200mm f2.8 lens and FLI ML 8300 camera with a total 9 hours of exposure. Taken on April 12 and 13, 2012 by Lynn Hilborn, WhistleStop Obs, Grafton,Ontario. Central star is HIP51521 about 4.5 degrees from M82.
As noted astrophotographer Rogelio Bernal Andreo writes...
in simple terms, the IFN is dust clouds. However, unlike most known nebulae, they do not reflect,
scatter or fluoresce due to the radiation of any individual star or cluster of stars, but do so
from the integrated flux of all the stars in the Milky Way Galaxy. In other words, the IFN is
illuminated by the glow of our own galaxy.
Because the IFN is so faint, capturing it is a challenge, as even under good skies it will sit barely above the noise. This means that once you've captured the data and try to bring the signal from the IFN, you will bring it along with the noise in the image, making it almost impossible to discern between noise and nebulae. This is the main reason most images won't show any or almost any IFN - as astrophotographers deal with the noise - trying to make it dissapear - the IFN will dissapear with it. The IFN is relatively faint and not very well studied. . In addition to the blue hue characteristic of reflection nebulae, the galactic cirrus also emits a faint reddish glow as UV light from the Milky Way’s stars is absorbed and re-emitted in the red spectrum. Text with the kind permission of Rogelio Bernal Andreo (DeepSkyColors.com)