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NGC 2070, The Tarantula Nebula in SHO from Great Data, David Payne
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NGC 2070, The Tarantula Nebula in SHO from Great Data

Getting plate-solving status, please wait...
NGC 2070, The Tarantula Nebula in SHO from Great Data, David Payne
Powered byPixInsight

NGC 2070, The Tarantula Nebula in SHO from Great Data

Equipment

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Acquisition details

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Description

I would love to take full credit for this image, but instead, it must go to the wonderful calibrated and integrated data supplied to me by the amazing, accomplished astrophotographer , Terry Robison, whom I met via The Astro Imaging Channel.  The data consists of 72 hours! of total integration time with L, R, G, B, Ha, SII, and OIII filters.   Terry, kindly allowed me to use this data to see what a I could do with the GHS script and other recent development in processing techniques and share the results here.   It is astounding how gratifying it is to use such as dataset, but I have to confess that anything you don't like about this image is due to my own bumbling handling of it.   Please also have a look at Terry's youtube video on image aquisition on the TAIC it is most instructive.  @Terry Robison , whom is a fellow Canuck, now resides in Australia.

The Tarantula Nebula is "in" the large Magellanic Cloud, and is one of the largest emission nebulae known, Mag 8 - nearly 100x the size of the Orion Nebula. It is so bright, that if it were as close to us as the Orion Nebula, it would cast shadows.  It is on the leading edge of the Large Magellanic Clloud, where the hydrogen gases are being compressed creating a very active star generation are - and is thought to be the most active starburst region not only in the Milky Way, but in all of the local group of galaxies.  For other northern astrophotographers, it is extremely interesting to read about this astounding star forming region.

The data was collected and perpared by Terry Robison between 2018 and 2019, and used here with his expressed permission.

Plate Solve Details
Right ascention:  5 38 42.730
Declination:    -69 22 08.84
Pixel Scale:  0.83
Focal length: 2309

Equipment Details:

•10 Inch RCOS fl 9.1
•Astro Physics AP-900 Mount
•SBIG STL 11000m
    Gain: 0.817   / Gaussian Noise: 18.59
•FLI Filter Wheel

Filter Details:
•Astrodon LRGB Filters
•Baader Planetarium H-alpha 7nm Narrowband-Filter
•Baader Planetarium OIII 8.5nm Narrowband-Filter
•Baader Planetarium SII 8.0nm Narrowband-Filter

Exposure Details

•R 56X450 Binned 2X2  (Red Upscaled)
•G 35X450 Binned 2X2 (Green Upscaled)
•B 5X450 Binned 2X2 (Blue Upscaled)
•L 48X900
•Lum 65X100
•Ha 39X900
•SII 72X900
•OIII 66X900

My processing approach was to create an SHO image (using roughly the Hubble palette methodology of Cuiv the Lazy Geek, and test the ability of the GHS script to distribute contrast across the brightness range to best show details at all levels.  (This will be the subject of an upcoming Astro Imaging Channel on May 29, 2022).   Help on dynamic range was also provided by back-averaging HDRMT and some LHE.   The images were photocalibrated in colour (both NB and BB) and ultimately Starnet2 was used to extract the a and b channels (from L*a*b model) from an RGB version for better star colour.  Starnet2 was also used on the extracted NB luminance to perform deconvolution on the starless image.  Processing also made use of the NoiseXterminator script for noise I inevitably added to the data.

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