Celestial hemisphere:  Southern  ·  Constellation: Serpens (Ser)  ·  Contains:  Eagle Nebula  ·  IC 4703  ·  LBN 67  ·  M 16  ·  NGC 6611  ·  Sh2-49  ·  Star Queen  ·  Star Queen nebula
M16 linear uncropped raw image, Freestar8n
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M16 linear uncropped raw image

M16 linear uncropped raw image, Freestar8n
Powered byPixInsight

M16 linear uncropped raw image

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Description

Raw bicolor image of M16 in Ha/Oiii filters with linear stretch and no cropping.  The Ha data were mapped to RGB values corresponding to perceptual response of Ha and a faux HB signal.  The Oiii data were scaled by a factor of 1.5 and mapped to RGB values corresponding to perceptual response of Oiii.  Then the image was linearly stretched in photoshop by setting black and white points - and nothing else.  It is a linear representation of the data captured, with a single linear scaling of the Oiii channel.

EdgeHD11 on CGX-L with 5m exposures on ASI1600.  Oag guided with MetaGuide.

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M16 linear uncropped raw image, Freestar8n