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Interacting galaxies NGC 4038 and 4039, in Corvus, with supernova SN2004gt imaged here a full 2 months after discovery.

On deeper images 2 long tails are visible attached to the galaxies - hence the name.

Image info

Telescope:  Celestron 9.25" Schimdt-Cassegrain at f/6.3

Focus:  Prime focus

Filter:  Celestron LPR

Mount:  Vixen GPD with Skysensor2000

Camera:  Modified Canon EOS 300D, at ISO400

Guiding:  700mm refractor guidescope, SAC7 camera, autoguided with Guidedog software

Exposure:  Total 42 mins (14 x 180s)

Date:  13th February 2005

Processing:  RAW file conversion, Offset and Dark subtraction, flat fielding, registering and stacking done in IRIS.  Curve stretching and colour saturation enhancement by Luminance Layering in Photoshop CS.


Processed using flats produced using a new light box that I have built.  Improvements in overall image evenness, but in this case the no. of frames stacked was less than ideal, hence a noisy image.

This supernova is not obvious because it is situated in or near a bright, active star forming area.  I plan to image this again in about a month's time to see how much it will have dimmed.


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