Archive for the “Sky 90 and SXVF-M26C” Category

Images taken with the 10-Megapixel Starlight Xpress M26C one-shot colour CCD and the Sky 90 refractor.

Got 6 x 20-minute subs with the Canon 200mm lens which I added to some earlier Sky 90 data.

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I managed to get a further 10 hours to add to the initial 7 hours taken using the Sky 90/M26C array – 20-minute sub-exposures.

I don’t think that the additional 10-hours added much in the way of depth to this image, but it did mean that I didn’t need to use any noise reduction like I had to with the 7-hour image.  This is worth remembering for future “marathon” imaging sessions.  Probably not worth going beyond the “magic” 8-hours per frame.

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Last night I got 7 hours of 20-minute subs on the NGC6914 region using the Sky 90 array.  The result is shown here.  As it is clear (and now Moonless) I am going for a bunch more 20-minute subs tonight to see if I can improve the image at all.  The first bit of real experimental imaging work I have carried out on the Sky 90 array since putting it all together.

I have a feeling I know what next month’s Image of the Month might turn out to be.

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Here is the New Forest Observatory Image of the Month – last bit of data acquired only last night.

This is a 2-framer of the Heart nebula region taken using the Sky 90 array and the M26C OSC CCDs.  The lower frame (captured last night) is 8-hours worth of 20-minute subs and the upper frame is 5-hours worth of 20-minute subs.  The frames were assembled in Registar and processing was carried out in Photoshop CS3 using Noel Carboni’s Photoshop Actions for Astronomy.

Although this could do with still more data I need to move onto something new for my next target.

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Last night I managed to get 10 x 10-minute subs using the Sky 90 array on the Cygni 32 region.  Pretty amazed that I could see some nebulosity with so few (shallow) subs.  Anyway – main point of the exercise was to get the two Carbon stars just above Cygni 32 and about equidistant apart from it.  These are U Cygni (on the left) and SV Cygni (on the right).  I combined some earlier HSIII data on just U Cygni with the Sky 90 data for this result.

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Having swapped out the Master Computer and mucked around a bit with Sky 90(1) I had some clear sky last night to take some test shots to see what needs fine tuning.  This image is just 12 x 5-minute subs with the array.  I now know that I need to very slightly flatten the Sky 90(1) chip and I need to re-align Sky 90(2) and Sky 90(3) to Sky 90(1).  Then the Sky 90 array will be ready for the new season.  The Canon 200mm DSLR array is of course fine and needs no attention!!  I wish now that I had built the whole array out of Canon 200mm lenses – live and learn 🙂

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Noel Carboni recently processed the 22-hours of data from the Sky 90 mini-WASP array.  This data comprised 15 and 20-minute sub-exposures.

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I have only just stacked ALL the data on this one from late 2014.  This is 69 subs using 15.20-minute exposures for a total of 22-hours on this one.

The Sky 90 array on the mini-WASP. f#4.5 3 x Sky 90s and 3 x M26C OSC CCDs.

 

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Beautiful clear Moonless night last night but we only get astronomical darkness starting around 11 p.m. so it’s a late start at this time of the year (and darkness ends around 3 p.m. so you don’t get many hours of darkness either).  I saw some nice contrasting red and blue stars in Draco using a planetarium program, and as a bonus I could also get NGC 4236 (Caldwell 3) in the frame as well – a barred spiral galaxy.  This image is 30 x 10-minute subs taken with the Sky 90 array on the mini-WASP.  When I packed up for the evening there was Saturn near Antares in the south, and quite high up in the sky there was Lyra and Cygnus, so summer is clearly not far away 🙂  All in all a superb night’s imaging.

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Turned out rather noisy for 30 x 1,000 second subs with the Sky 90 array.  Not sure why as there was no Moon about.  Maybe I forget to turn the Peltiers on??  Need to redo this one with the Hyperstar III.

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