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Sol in Ha 14 May 2019 - AR2741 plus prominence

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About this observation
Observer
John Hughes
Time of observation
14/05/2019 - 10:45
Object
Sun
Observing location
North Essex
Equipment
William Optics Z61
Daystar Quark Chromosphere Ha filter
ZWO ASI174MM camera
SharpCap image capturing software
Photoshop
Exposure
10ms exposure; Gain 40 on surface image and Gain 200 on prominence
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Attached is an image of the Sun taken in Ha on 14 May 2019.

The final output is comprised of two images, one capturing the surface detail and the second the prominence. Both were taken with my William Optics Z61, Daystar Quark Chromosphere, ZWO ASI174mm and captured using SharpCap.

Surface image - Exposure time 10ms, Gain 40. 3,000 framed AVI.

Prominence image - Exposure time 10ms, Gain c290 (memory bad!). 3,000 frames AVI.

SharpCap settings then restored to the surface image setting. Telescope was then centred on the Sun and defocussed.  Further 3,000 frames of an AVI were taken to create a stacked flat frame.

All three AVIs were stacked in AutoStakkert2 with the surface and prom image calibrated with the stacked flat frames. Best 60% taken.

Levels adjustments undertaken in Photoshop along with high pass sharpening. Two images brought together as separate layers and combined in difference mode then inverted. Some contrast adjustments made to surface image to help reveal more detail.

 Many thanks.

 John

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