Observation by Alun Halsey: Sol'Ex solar scan 17 June 2024

Uploaded by

Alun Halsey

Observer

Alun Halsey

Observed

2024 Jun 17 - 07:05

Uploaded

2024 Jun 19 - 09:18

Objects

The Sun

Equipment

Skywatcher Evostar 72ED + full aperture Hoya ProND 16 filter
Sol'Ex SHG (10 micron wide slit,2400l/mm grating)
Player One Neptune-M (IMX178)
CEM60

Location

Reading Berkshire UK

Target name

The Sun

Title

Sol'Ex solar scan 17 June 2024

About this image

Solar scan using 16x sidereal, reconstructed and auto processed in Jsolex. No other processing carried out (except resizing of image) Single scan, no stacking.

Files associated with this observation

07_05_01Z_20240617_clahe_0_00.jpg (503.5 kB)

Like this image

Charles Graham Taylor, Chris Hooker, Dr Paul Leyland, Gerard Cauchi, Callum Potter, John Robert Adamson

Comments

Chris Hooker, 2024 Jun 19 - 17:22 UTC

Your H-alpha images are superb, Alan. What is the bandpass of your setup? It looks to be narrower than any of the hydrogen-filter type images.

Chris

Alun Halsey, 2024 Jun 20 - 10:16 UTC

Thank you Chris. The Sol'Ex with 10um slit and 2400l/mm grating is I believe working at around 0.3 angstrom.

Alun

Chris Hooker, 2024 Jun 21 - 09:22 UTC

Thanks, Alun, that is remarkably narrow-band. Even double stacked etalon-type filters only get down to around 0.5 Angstrom. Does the software allow you to select different parts of the line to pick up velocity effects?

Also, my apologies for mis-spelling your name in my first comment!

Chris

Alun Halsey, 2024 Jun 22 - 07:30 UTC

No problem in regards the mis-spelling :)

Jsolex will automatically pick out redshifts in the Ha line and can create MP4 movies showing the tuning as well as give the speed at which the redshift is moving. The other reconstruction software (SHG main & INTI) allows only manual shifting whereby the user enters a pixel shift of their choice and a series of images are created.

Alun

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