Swansea Astronomical Society Blog

Saturday, June 8, 2013

 

Streaming activity in a Prominence over a 20 min period on June 7th

A Lumenera LU075 monochrome CCD camera, fitted with stacked Barlow elements giving a magnification factor of 2.9 was used with a Lunt 60mm H-alpha solar scope to capture 40s AVIs at 60fps of a prominence region on the limb of the Sun.  AVIs were captured at 2 minute intervals over a 28min period. The AVIs were stacked in Autostakkert!2 and wavelet processed in Registax 5. The images were roughly cropped in Paint Shop Pro and then automatically registered and evenly cropped in Andrew Sprott's Blink Comparator software.
An animation was created in Animation shop to show the streaming activity in the prominence.



The image can be seen to be rotating during the imaging. This is due to the scope being mounted on a driven, altazimuth mount.

Derek Francis

Friday, June 7, 2013

 

An erupting solar prominence

At 10-42h BST, a large solar prominence was imaged using a DMK21AS camera fitted with stacked x2 + x3 Barlows and a Solarmax ll 60 BF15 H-alpha scope. The part of the disk from which the prominence arose was also imaged. The two images were combined using the Gimp image processing software to produce the final image:
10-42 BST


An image of the Earth has been superimposed at the same scale.  The prominence was, at this time, 92,375 miles long and was, at its highest, 68,959 miles above the limb of the Sun.
 
From 10-42am until 12-09pm, nineteen x 1000 frame AVIs were captured of the prominence and stacked in Registax to produce 19 final images. Andrew Sprott's Blink Comparator software was then used to register all of the images in sequence and an animation was built from the images in Animation Shop. The animation repeats and show how the prominence changed eruptively over a period of 87 minutes:
 
 



A whole disk image was made by placing an Opticstar PL-130-M, 1.3Mp monochrome, CMOS camera, fitted with stacked neutral density filters, at the prime focus of the Solarmax H-alpha scope.
An AVI was captured, exposed for the prominences and another exposed for the disk. Registax was used to process the AVIs, and the resulting images were combined into a single image. Click on the image to get a larger view:



Steve Wainwright
 

Noctilucent Clouds from Swansea

Between 11-10 and 11-30 BST a noctilucent cloud display was imaged with a tripod mounted Pentax K-x DSLR with a 70mm lens. Click on an image to get a larger view:







Steve Wainwright

Thursday, June 6, 2013

 

Solar prominences and filaments in H-alpha light

A DMK21AS camera was placed at the prime focus of a Solarmax ll 60 BF15 H-alpha scope. AVIs of four over lapping regions were captured. Each region was exposed for the disk and also for the prominences. The resulting images were merged into a final image of the Sun in H-alpha light. Click on an image to get a larger view:

 
 
A 3x Barlow was attached to the camera and two regions were captured that contained prominences and filaments:
 




Steve Wainwright

Tuesday, June 4, 2013

 

The Sun in H-alpha and Ca K-line light

An Opticstar PL-130M Monochrome, 1.3MP camera was placed at the prime foci of a Solarmax ll 60 BF15 H-alpha scope and a CaK PST, Ca K-line scope and AVIs of the whole disk were captured. In H-alpha the AVIs were exposed for the Disk and the prominences separately.
The prominences image and the disk, H-alpha images were merged to show all of the structures. Click on an image to get a larger view:
H-alpha
 
 
 
Ca K-line light

 
 
The two images were combined to produce an image showing all of the features from H-alpha and Ca K-line light:
 

 
 
Steve Wainwright


 

Solar active regions and prominences

All images were taken using a Lunt 60mm H-alpha scope and Lumenera camera at 60 fps.
A full disk including prominences was imaged using a focal reducer. Registax 5 was used to stack the captured AVIs:
 

The following images are close up views of prominences and active regions using stacked Barlows, giving a factor of 2.9




AR1762

AR1764

Derek Francis

Monday, June 3, 2013

 

The Sun with prominences in H-alpha light

A DMK21AS camera was placed at the prime focus of a Solarmax ll 60 BF15, and 4 overlapping areas of the Sun were imaged, exposing for the disk and also for the prominences. The resulting images were merged to produce a single image:

A 2.5x Barlow was attached and a region of prominences on the western limb was imaged, exposing both for the disk and for the prominences. The resulting images were merged into a single image:


Steve Wainwright

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