AG Carinae NB-RGB and HOO Composition (andrea tasselli)

Celestial hemisphere: Southern · Constellation: Carina (Car)

AG Carinae NB-RGB and HOO Composition, andrea tasselli

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AG Carinae NB-RGB and HOO Composition

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AG Carinae NB-RGB and HOO Composition

I stumbled upon this interesting object whilst having a peek at PK288 -0.1 which was listed at higher magnitude than the results seemed to show (i.e., much lower brightness). I immediately realised that I was looking at a Wolf-Rayet star at the very beginning of its career. The star in question happend to be HD94910 or better known as AG Carinae and it was located just 100 pixels shy of the upper frame border. It also happened to be imaging with the observatory with much reduced coms so having to relay with just 60s exposures. As I realised that a much more interesting object was in the fov I re-issued a further image request with the object now centered in the fov. Bottom line the image is a mosaic of the two separate data streams. Also, because at that time the scope field correction was quite poor the good-looking stars are mish-mashed with the bad-looking stars which also means I had to go through a number of loops before I got something half decent. And never mind the massive star bleeds which I had to fix by hand.
This said on the genesis of the image, the image itself is a composition of a narrow-band enhanced RGB (the upper portion) and a purely HOO composition (the lower framed portion), the latter to better show the nature and morphology of the bow-shocked gaseous envelope of the star, otherwise swamped by the massive brightness of the stars in the RGB channels. And never mind the spider spikes!

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AG Carinae NB-RGB and HOO Composition

AG Carinae NB-RGB and HOO Composition

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AG Carinae NB-RGB and HOO Composition

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