alan4908 Posted June 14, 2018 Share Posted June 14, 2018 NGC4631 is a starburst galaxy that is viewed edge on from Earth and interacts tidally with the dwarf galaxy NGC4627, forming a "light bridge" between the two objects. It has also very vibrant star forming regions along its length. Due to its shape it is commonly known as the Whale and Companion. The image below is an LRGB image and represents about 7 hours integration and was taken with my Esprit 150. Due to poor weather and my multi object acquisition strategy, the image capture ended slightly prematurely since it has now disappeared below my local horizon. ? Whilst I'd have liked to gather more data, particular on the Lum channel, I was reasonably pleased at the level of detail revealed. Alan LIGHTS: L:10, R:6, G:13, B:12 x 600s, DARKS:30, BIAS:100, FLATS:40 all at -20C. Link to comment Share on other sites More sharing options...
JohnSadlerAstro Posted June 14, 2018 Share Posted June 14, 2018 Wow that's amazing! The colour is so perfect, what software did you use to process it? John Link to comment Share on other sites More sharing options...
alan4908 Posted June 15, 2018 Author Share Posted June 15, 2018 21 hours ago, JohnSadlerAstro said: Wow that's amazing! The colour is so perfect, what software did you use to process it? John Thanks for the comment John. The image was processed using three software packages: CCDstack: calibration, alignment, stacking, data error rejection, DDP stretch (lum) and deconvolution. PS: contrast enhancement, sharpening, colour enhancement, linear stretches, mask generation. Pixinsight: gradient reduction (DBE), photometric colour calibration, sharpening (MLT), background noise reduction (TGV). Alan Link to comment Share on other sites More sharing options...
Barry-Wilson Posted June 16, 2018 Share Posted June 16, 2018 Terrific Alan - you have shown the tidal streams and surrounding star halo very well. Link to comment Share on other sites More sharing options...
alan4908 Posted June 17, 2018 Author Share Posted June 17, 2018 10 hours ago, Barry-Wilson said: Terrific Alan - you have shown the tidal streams and surrounding star halo very well. Many thanks Barry - to be honest, I was a little surprised that these revealed themselves so well with the relatively short lum integration time. Alan Link to comment Share on other sites More sharing options...
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