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Telescope |
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Calar Alto 3.5 meter at prime focus (f3.9; image scale of 0.226"/pixel).
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Camera |
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LAICA, CCD#1.
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Filters |
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Johnson B and V, Sloan r'.
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Exposure Time |
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139 minutes (5x10 min + 3x1 min in B and r'; 3x10 min + 3x1 min in V).
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Calibration |
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PixInsight Core 1.2.
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Processing |
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PixInsight Core 1.2.
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Copyright Notice |
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Data adquired by Gilles Bergond under discretionary time of CAHA's director, Joao Alves. Observation planning and data processing by Vicent Peris. Special thanks to David Galadí-Enríquez.
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Notes |
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White calibration has been done taking the whole light coming from NGC 7331 as reference.
All over the image field we can see the foreground galactic nebulas. A more concentrated blue structure can be seen just bottom of NGC 7331; this must be further studied to know if this is a galactic nebula or a tidal stream of NGC 7331.
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External Links |
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CAHA's Image Release.
Article about the image processing of this image.
Image discussion in PixInsight's Blog.
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Publications |
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Awards:
Astronomy Picture Of the Day 22/Oct/2008.
Top Ten Pictures of 2008 at BadAstronomy Blog (fourth place).
Scientific American website image gallery.
Max Planck Institut Für Astronomie (MPIA, Germany) picture of the month (Oct/2008).
Printed media:
Sterne und Weltraum Astronomy magazine (Germany).
Astronomía magazine (Spain), "En el foco" section.
Frankfurter Allgemeine Zeitung newspaper (Germany).
El Levante EMV Newspaper (Spain): 21/10/2008, 30/10/2008
Las Provincias newspaper (Spain): 29/10/2008, 26/12/2008, 27/10/2008
ABC newspaper (Spain): 30/10/2008
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