Swansea Astronomical Society Blog

Thursday, June 15, 2017

 

Saturn at opposition

Celestron 9.25 SCT AVX, 2xTelevue Barlow, ZWO ASI120MC-S camera, 10017 images captured in Firecapture, 1500 stacked and aligned in AutoStakkert!2.6, wavelets in Registax 6, then edited in Adobe Elements 11


Celestron 9.25 SCT AVX, 2xTelevue Barlow, ZWO ASI120MC-S camera, 5000 images captured in Firecapture, 1250 stacked and aligned in AutoStakkert!2.6, wavelets in Registax 6, then edited in Adobe Elements 11


The Seeliger effect is very clear.

Colin Miles

Wednesday, June 14, 2017

 

LRGB image of M57 with a DMK 21AU04.AS, a ZWO motorised filter wheel, all controlled by AstroDMx Capture for Linux

An 8" SCT fitted with a 0.6 focal reducer was mounted on a GOTO HEQ5 mount. The mount was quickly polar aligned and 3-star aligned, and sent to M57. Everything was done quickly in Astronomical twilight before the Moon was substantially risen. Nicola's AstroDMx Capture for Linux was used to control the camera and capture the images as well as remotely controlling the ZWO filter wheel. 30s exposures were captured. 20 luminance images were captured through an IR/UV cut filter, and 10 images were captured through each of the RGB filters. Dark-frames were also captured.

 Nicola capturing the image data.
The photograph was taken with an IR flash and a modified camera to avoid disturbance
 
The images were stacked in Autostakkert 2.6 and the RGB images were automatically combined in Andrew Sprott's Colour Alignment Processor (AutoCAP).

 Screenshots of AutoCAP
Initial relative positioning of the RGB channels, due to poor tracking

After the colour channels had been registered in AutoCAP

The luminance channel was added, and the resulting image processed in the Gimp 2.9
LRGB image of M57

The first release of AstroDMx Capture for Linux will have manual control of the ZWO filter wheel. Later releases will have fully programmable filter wheel control and image capture, and subsequently control of all ASCOM compliant filter wheels.

Nicola Mackin and Steve Wainwright
 

The Sun, June 13th, in Ca K-line and H-alpha light

Scopes were mounted on an iOptron Cube Pro, AZ, GOTO mount. A CaK PST scope was used with a DMK 21AU04.AS camera. Nicola's AstroDMx Capture for Linux was used with a Linux Mint laptop to capture a 500 frame SER file of part of the solar disk, showing an emerging sunspot on the limb and some weak chromospheric network activity. The bet 90% of the images were stacked in Autostakkert! 2.6, using 1.5 drizzle, wavelet processed in Registax 5.1, and processed in the Gimp 2.9.


A Solarmax II, 60, BF15, H-alpha scope was used with a DMK 21AU04.AS with a x2 Barlow lens on the camera adapter. AstroDMx Capture for Linux was used to capture two 5000 frame SER files of part of the solar disk, showing an emerging sunspot on the limb and a hedgerow prominence. One file was exposed for the prominence and the other for the solar disk. The best 50% of images in the SER files were stacked in Autostakkert! 2.6, wavelet processed in Registax 5.1, and processed in the Gimp 2.9. The two resulting images were then combined in the Gimp 2.9 to produce the final image.


Four overlapping quadrants of the Sun were imaged in H-alpha, capturing 1500 frame SER files with AstroDMx Capture for Linux. The resulting images were stitched in Autostitch in Wine, wavelet processed in Registax 5.1 and processed in the Gimp 2.9.


Steve Wainwright

Tuesday, June 13, 2017

 

Swansea Astronomical Society talk to and present a telescope to the New Barry Astronomical Society. More power to astronomy in South Wales.

The astronomical societies of South Wales, UK, have never considered themselves as rivals, indeed, they frequently work together in public astronomical events.
Last night, Brian Stokes the previous chairman of the Swansea Astronomical Society (SAS) gave a talk to the Barry Astronomical Society (BAS) on 'The Wonderful world and Universe', a variation on a talk that he presents to schools as part of SAS outreach.
Barry Astronomical Society is just one year old and was founded by Dave Powell MBE. Brian Stokes presented BAS with a 102mm refractor on an equatorial mount on behalf of the SAS, to start BAS off with a portable scope for the society.


Photos from the meeting, which, as always, was well attended.



The SAS and BAS provide each other with speakers, maintaining the tradition of cooperation between the astronomical societies of south Wales.

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