Tuesday, 31 July 2012
Monday, 30 July 2012
AR11532 has two magnetic delta structures, one in the leading penumbra, another in a central penumbra. Further M class flaring is possible. Flare: M2.3/1N at 06:22 UTC.
Taken with the 127mm @ 1900mm DMK31
Sunday, 29 July 2012
AR11532 has a magnetic delta structure in the largest leading penumbra and many spots spread out over a large area. Further M class flaring is possible. Flare: M6.1/2N at 20:56 UTC. A partial halo CME was observed after this event, the CME could have a minor Earth directed component. NOAA forecasters estimate a 25% chance of additional M-flares during the next 24 hours, although the actual odds seem higher.
Taken with the 127mm SS @ 1900mm fl DMK31.
Taken at over 3 metres focal length, way more than the seeing conditions would allow me to get away with, however it does show that whatever is coming around the limb has a bit of life in it.
Lots happening on our star at the moment as this strip shows. This represents a 4 pane mosaic taken with the 127mm PST mod @ 1900mm fl DMK31. This is quite an achievement as have been doing quite a lot of work lately to minimise the effects of sweetspotting in the humble PST etalon. Judging by how even this is I would say is a success. Next stage of modding the PST mod is to replace the collimating lens in the etalon assembly with one more suited to the focal ratio of the 127mm scope (f9.3). This will negate slight vignetting in the system and will mean this PST mod is operating at full 127mm aperture. The replacement lens has been purchased from Edmund Optical.
Wednesday, 25 July 2012
Monday, 23 July 2012
Whilst still pretty quiet, new active regions in the northern and southern solar hemispheres on the the solar limb are set to change that. Taken with homebrew CaK filter 70mm f9 DMK31
Whilst still quite indistinct on the limb our new (?) spot shows the depressed crater like appearance that is the Wilson Effect. There is a very good chance that this is AR11513 making a full return around the sun.
Taken with a pair of SM40 externally mounted etalons and a PST etalon mounted internally in the focuser. Lots more detail visible at these narrower bandwidths - looks quite different to double stacked!
Sunday, 22 July 2012
The flame prom that was visible yesterday is slowly detaching and hovvers above the sun like a big plasma cloud, held in place by magnetic field lines. AR11526 is a quiet active region and poses little threat for solar flares. Taken with the 127mm SS @ 1900mm fl DMK31.
Saturday, 21 July 2012
An incredibly brief window this saturday morning before high level cloud raced in and jet stream seeing reduced the view through the eyepeice to jelly. Still new active region AR11526 was graced with a lovely flame prom. Hopefully sunday will offer better conditions for solar astronomy!
Monday, 16 July 2012
Taken with the 127mm PST mod @ 1900mm fl this image represents a 2 pane mosaic from the DMK31. Since previous results alot of work has gone into the PST mod itself; the etalon has been collimated with respect to the optical axis, the refractor has been collimated with a cheshire eyepeice, in addition extra baffles have been placeed in the refractor tube. There are hopefully further improvements to be had - its should be possible to further refine the etalon housing and also have plans to increase the number of baffles in the refractor tube.
All in all a good sunday morning!
Thursday, 12 July 2012
Only the briefest of cloud gaps this afternoon allowed me to setup and then record this image: Monster active region AR11520 still has a delta class magnetic field and is more than capable of producing x-class flares, however has remained fairly quiet in the last 24 hours. In the mean time rivers of solar plasma readily flow like rivers in and around its component spots. Any flare activity now is squarely geo-effective as this maelstrom sits mid disk on our star, and so the risk of a storm is considerably higher...
Taken with the 127mm PST mod at 1900mm fl DMK31.
Sunday, 8 July 2012
As new active region AR11520 rounds the limb it is crackling with a complex Beta - Gamma magnetic field that harbours an 80% chance of M-class solar flares over the next 24 hours. The bright white areas in the photo are much smaller C-class flares that are continuosly crackling away. At over 127,000km in length it is over 10 times the size of Earth. Definitely worth keeping an eye on this one over the coming days as it gradually becomes more geo-effective and the risk from solar storms to Earth increases.
Taken with the 127mm PST mod @ 1900mm fl DMK31.
Wednesday, 4 July 2012
This video shows how to disassemble and reassemble a PST etalon housing - usual rules apply - don't blame me if it goes wrong for you!
Sunday, 1 July 2012
I didn't think I would get to image today, grey skies and my thermometer was reading 12c at 11.00am (yes it is July!), however by late afternoon the skies were breaking and despite the 'haze' of the next batch of weather encroaching I managed to get this one frame of active regions AR11513 & AR11516, despite NASAs verdict that these are decaying they have been crackling with C class flares throughout the day.
This is second light with the 127mm PST mod - i thought I was wasting my time with imaging today, the seeing in the cloud gaps really wasn't very good, however i'm really quite pleased as to what Avistack has recovered from the raw data. It really does hold promise for if we actually get any decent sunny weather anytime soon here in the UK.
I'm also looking to modify the etalon holding cell from the PST - there is some lateral 'slack' in it, that causes the image to grade from being on band to slightly off band across the frame. It is possible to tweak this to an 'ideal', but is fiddly. More cloud and rain is forecast in the coming week so this will be my project!