New monster active region AR11734 rotated into view on the 28th april, the region has a huge umbral area compared to other active regions on the disk and could well easily become a naked eye spot in the days ahead. It also harbours energy for M-class flares. This image was taken with the 70mm PST mod at 1000mm fl with a DMK31 camera.
Tuesday, 30 April 2013
Activity is really starting to pep up on the sun, maybe this is the suns second peak that some scientists were predicting to occur in may 2013. This is a 6 pane mosaic taken with the 70mm PST mod @ f7, with DMK31 camera.
Sunday, 28 April 2013
I was really able to push the focal length on saturday up to 2000mm and zoom in on monster active region AR11731. This is currently the largest active region on the suns disk, and has a beta-gamma magnetic field that harbours energy for M-class solar flares. Currently, these would unlikely be Earth directed, but in the days ahead as this active region becomes more geo-effective the chance for auroral activity could increase. Taken with the 100mm frac at 2000mm fl with homebrew CaK filter and Imaging Source DMK31 camera.
I'm really liking using the 100mm frac with 0.5x reducer to give me ~500mm fl for getting CaK disks. The increase in aperture from my 70mm scope to this at these short wavelengths is really noticeable. This is a 6 pane mosaic taken with the homebrew CaK filter, Lunt wedge with no ND filters as an ERF and DMK31 camera.
Taken with the 100mm frac at f5 with homebrew CaK filter and DMK31. This active region was undesignated at the time the image was took (s2377), however now is designated AR11732.
Taken with the 70mm pst mod at prime focus - just over f7, following some work in tightening up joining components in the optical train I am now able to image at the native focal length of the system - which is good as only takes 6 panes to make the full disk rather than 12 when I was running at 800mm fl!
Thursday, 25 April 2013
Sometimes the smaller scope works best when the seeing isn't cooperating, and on saturday this was definitely the case. The image I took of this active region with the 127mm was soft, blurry and lacking in definition, however the smaller 70mm was less sensitive to the poorer conditions and as a result the image that came out actually had more sharpness, detail and definition. This was taken with the 70mm PST mod at 800mm focal length with the DMK31 camera.
Sunday, 21 April 2013
Taken with the 100mm scope at 1600mm focal length there is absolutely tonnes of detail to be seen in this CaK image. This is the best 50 frames of 600 shot. Taking short avis for CaK seems to be a key thing is avoiding temporal distortion in the resultant images, as at longer focal lengths the detail changes in a very short space of time.
Lots to see on our star today in Ha wavelengths! Taken with the 70mm PST mod at prime focus - about f7.5, this allows the image to be made up of only 6 panes and at the same time shows no adverse effects due to sweetspotting. Image shot with a DMK31 camera.
Tuesday, 16 April 2013
An unusual sun today; despite it having quite a few sunspots on the disk it was strangely lacking in activity as a whole, and, as such, was presenting a quiet disk. Fortunately there was a good selection of proms around the limb making up for things. Taken with the 70mm PST mod @ f11 with the DMK31 camera.
Despite there being a decent selection of spots on view, things seemed pretty quiet on the big purple sun today. Regardless, it is always nice to view our sun in these short wavelengths. Taken with the 70mm @ f9 with the homebrew CaK filter and DMK31 camera.
Friday, 12 April 2013
Thursday, 11 April 2013
Wednesday, 10 April 2013
Sunday, 7 April 2013
Taken with the 127mm PST mod at 2000mm focal length with a DMK31 camera, this shot shows what a sprawling mass of activity AR11711 is, with dark lines of plasma being channeled and directed by the magnetic field lines emanating from this massive active region.
Taken with the 5" PST mod as shown in the post below, this image is a 6 pane mosaic taken at ~2000mm focal length with the DMK31 camera. The original image is huge - 3000 pixels wide and shows alot more detail than can be seen in this small preview - click on the image to be taken to the flickr host site for the image in a range of sizing options.
With so many (if small) sunpsots, the view in ha was always going to be a good one. Taken with the 70mm PST mod there was plenty to see! Click on the image to view the full size version on flickr!
Taken with the 100mm at 2000mm focal length, this is a stack of only 10 frames from autostakkert2. The image is slightly noisy as a result, but does show a wealth of small scale fine details. I do wonder that by stacking with image stacks up in the 100s of frames if some of the details are just being smeared out by seeing variations or through temporal distortion. Either way, the use of smaller stacks at these shorter wavelengths is something I will be exploring in more detail when the sun returns again.
Like with the white light, the 100mm Tal refractor at f6 offers a considerable improvement in resolution over the 70mm in terms of the finer details visible, and at only 6 panes for a full disk mosaic makes for a very easy option. However, the down side of this increased resolution is greater susceptibility to poor seeing conditions, which unfortunately struck on this image which as supposed originally to be a full disk. This is a very large image, much larger than is capable of being shown on this blog, and as such is recommended to click on the image which will take you the flickr host page and the full resolution version.
I'm quite liking using the 100mm Tal refractor with focal reducer to give ~600mm focal length as a useful way to get full disk images. This is a 6 pane mosaic taken with the Lunt wedge and continuum filter along with the DMK31 camera.
Friday, 5 April 2013
The weather isn't being as kind as I would like, but there were a few very brief breaks allowing me to get a view of monster sunspot AR11711. Still sporting a light bridge indicative of a decaying spot, this active region is clinging on, barely! This shot was taken with the 70mm PST mod at 1000mm fl with a DMK31 camera.
Wednesday, 3 April 2013
What a view this monster active region is currently giving us! Despite the region currently decaying in terms of activity with NASA giving less than 5% chance of M class flares and less than 1% chance of X class flares, there is plenty to see! Taken with the 70mm PST mod, 2.5x powermate and DMK31 camera.
Our star is simply stunning at hydrogen alpha wavelengths at the moment with so many different features to see, and today was no exception! Taken with the 70mm PST mod at 800mm focal length this image is a 12 pane mosaic shot with a DMK31 camera. The original image is very large and well worth a look on a large monitor, just click on the image to take through to the Flickr image host and a range of resizing options.
High winds today meant the 100mm scope was a no-no; it was flapping around in the wind like a sail, so, had to resort to using the 70mm which is much more tolerant of poorer conditions. This was taken at 1050mm focal length with the 2.5x powermate, Lunt wedge and baader continuum filter and DMk31 camera. The monster spot can still be seen to be sporting a very photogenic light bridge still.