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markarian

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Everything posted by markarian

  1. until
    Talk by John I. Davies, Senior Researcher & Principium Editor, The Initiative for Interstellar Studies i4is Project Glowworm – near term low earth orbit demonstration of laser push technology Visitors are welcome at our meetings, but because of the popularity of our talks, visitors must register for a free ticket as visitor spaces are limited. Visitors can also leave after the main talk or are welcome to stay on for the rest of the meeting. Tickets will go live 1 month before the event. https://www.astronomyedinburgh.org/event/first-steps-to-interstellar-probes/ Also at our meetings: What’s in the night sky this month Overview of astronomy and space news Occasional member presentations
  2. until
    Talk by Dr Richard A. McCracken, Research Fellow Heriot-Watt University Institute of Photonics and Quantum Sciences The discovery of an planet orbiting a Sun-like star in 1995 sparked a quarter-century of research. In this talk we will look at how we hunt for exoplanets, some of the incredible systems observed so far, and what the future holds for this exciting field. Visitors are welcome at our meetings, but because of the popularity of our talks, visitors must register for a free ticket as visitor spaces are limited. Visitors can also leave after the main talk or are welcome to stay on for the rest of the meeting. Tickets will go live 1 month before the event. https://www.astronomyedinburgh.org/event/25-years-of-exoplanet-discoveries/ Also at our meetings: What’s in the night sky this month Overview of astronomy and space news Occasional member presentations
  3. markarian

    Hello everyone

    Hi - also from Edinburgh. I'm a member of the Astronomical Society of Edinburgh and it's a good way to meet other astronomers and learn about astronomy. Next meeting is Friday 5th July and you'd be very welcome. https://www.astronomyedinburgh.org/event/charles-piazzi-smyth/ There are other members in Balerno too (at least 4 that I know of) and I'm not far away. Maybe see you there? Cheers Mark
  4. until
    Talk by Prof. Andrew Lawrence, Regius Professor of Astronomy at the Royal Observatory Edinburgh. Celebrating the 200th anniversary of Edinburgh’s forgotten astronomer Charles Piazzi Smyth. In 1856, Charles Piazzi Smyth, together with his scientist wife Jessie, and a crew of sailors and Spanish helpers, changed the way we do astronomy. They traveled to Tenerife, lived on the mountain in stone houses they built themselves, and made amazing measurements that proved that observations were much better – clearer, sharper, deeper – than from smoky cities like Edinburgh. Piazzi Smyth believed that in the future we would all become “peripatetic astronomers”, wandering from mountain to mountain to get the best results. I will trace the story of how this idea became a reality, and how indeed wandering the globe to use bigger and better telescopes has been the story of my own career for 40 years. However, this golden age of peripatetic mountain astronomy is coming to a close. Why, and what lies ahead? This is the 200th anniversary of the birth of the extraordinary Charles Piazzi Smyth, so it is an excellent time to examine his legacy. Visitors are welcome at our meetings, but because of the popularity of our talks, visitors must register for a free ticket as visitor spaces are limited. Visitors can also leave after the main talk or are welcome to stay on for the rest of the meeting. Tickets will go live 2 weeks before the event. https://www.eventbrite.co.uk/e/61638104229/ Also at our meetings: What’s in the night sky this month Overview of astronomy and space news Occasional member presentations
  5. I find I still need one even though the RGB filters take some of the LP out. L definitely needs it. I just keep my IDAS P1 in front of everything. Don't know if that's correct or not but it seems to work for me. Without it my images fog too quickly. Mark
  6. This I took last night shows much better stars without the MPCC than with surprisingly. Even stars in the corners look pretty good.
  7. Definitely not going to use it - and it seems the 10 inch newt really doesn't need it. As Louise says - the sensor size probably means I gets away with it. In fact the MPCC was doing really weird things to the stars - even at the correct spacing. Not sure what was going on there. It worked fined for the 8 inch newt.
  8. Ahh didn't know that. Thanks Definitely a rat to me
  9. Never heard of it? Me neither - but after imaging the Christmas Tree Cluster NGC 2264 in narrowband it will forever be known as the Rat's Head Nebula - to me at least... Can you see it or is it just me? 250mm f4.8 Newtonian Atik 460EX Baader Ha, OIII, SII SHO colour mapping 10x300s each band
  10. Well I've finally decided that it is caused by the MPCC and the Baader filters together - even at the correct spacing there's still some effect. The really weird thing is that my images look far better without the MPCC. I only used it because it was necessary with my 8 inch Newtonian, but this 10 inch seems not to need it at all - and it certainly gets rid of the the horrible reflections / artifacts. Thanks again for everyone's help and suggestions. Mark
  11. First check is that MPCC distance is wrong. I've adjusted it (not totally correct yet but I'll sort that) and at first glance the pattern has gone! May have been chance that the position I chose just happened to produce a very nicely focused image of the spider and secondary! I'll do more tests to be sure. Mark
  12. Yes Baader MPCC. Spacers may not be exactly correct - I will need to check that out. Thanks everyone for your help. I have a few things to try out now. Mark
  13. From the calculator above I suspect I may have 2 possible sources: Coma Corrector and EL lightbox. Can try and eliminate both to prove the point. M
  14. SX filter wheel. Will check. Are filters not coated both sides?
  15. They are screw in filters so no other way to go in that I can see.
  16. Thanks vlaiv - will give those a go. Filters were new Louise. Mark
  17. One other possibility is the acrylic over the EL panel I use for flats being reflective? Suppose I need to try and change everything to see what works.
  18. The weird thing is the flats - they show an almost perfect image of the primary, secondary and spider. Final images show it too.
  19. Flats and subs all show the same in Ha and OIII. SII doesn't show these that I can see. The only thing that's changed is that this is the first real full narrowband image I've done - so a big change really Wondering if it's out of focus reflections from the MPCC to the Baader filters? Mark
  20. It is an unstacked sub but you can see the same pattern in both the sub and the flat. All subs in Ha and OIII have this. It was reasonably dark last night (or as good as it gets here on the edge of Edinburgh) so don't think it was against light. Both images seriously stretched to show the issue. Thanks
  21. Need some help with this please. Just started narrowband imaging with Baader filters and I'm seeing some very strange effects that I can't explain. Anyone seen this before and how do I get rid of it? Basically it looks like the primary, secondary and spider are showing up on the images. Here is a 200s sub in Ha (2x2) and an associated flat. I get seomthing similar for OIII too - but not SII. Telescope is 250mm f4.8 newt with an MPCC, Atik 460EX and Baader filters. Thanks Mark
  22. until
    Talk by Dr Paul Dalgarno, MPhys PhD CPhys, Associate Professor of Physics at Heriot Watt University . Black holes remain one of the most fascinating and intriguing phenomenon of the universe. On the one hand they are conceptually amazingly simple, on the other we still know very little about the detailed complexity around them. This talk will discuss the history of our understanding of black holes, some of the main properties of them and touch on some of the deeper questions connected to them. Regular meetings are held monthly and are open to members and non-members. Admission is free and visitors are always welcome. Also at our meetings: What's in the night sky this month News of what's happening in the world of astronomy and space Occasional member presentations Tea/coffee and chat afterwards
  23. until
    Talk by Dr Andrew Dennis, Director of Product Management at Andor Technology. When we think of Astronomy we think of beautiful Astrophotograpy images, but behind the scenes there are usually a vast array of “technical” cameras which ensure the telescope remains aligned, perform deep Astronomical analysis or produce details of the chemical composition of far off worlds. To make a Hollywood analogy, these cameras could be considered to be the Screenplay writers, Producers, Visual effects engineers of the Astronomy world, without these cameras the “lead actors” simply couldn’t perform. Regular meetings are held monthly and are open to members and non-members. Admission is free and visitors are always welcome. Also at our meetings: What's in the night sky this month News of what's happening in the world of astronomy and space Occasional member presentations Tea/coffee and chat afterwards
  24. I found this object the other night, never having heard of it before. It is lovely. Your image is much better than I managed - sky wasn't too transparent and ice forming on everything. Good one! Mark
  25. Imaged this last night - first supernova for me. A little tricky to keep it from being lost in the core but it's definitely there. Mark
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