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m a r k o

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About m a r k o

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    Nebula

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    Croatia
  1. M27 - Dumbell

    Thank you Peter! I'm actually very fond of this picture. I'll sure take new subs when I borrow a better mount and put the OAG and camera cooler in use. Should be even better then!
  2. NGC 7635 - The bubble nebula

    Thank you Wim! This is the uncooled version, but currently I'm playing with some peltier coolers I have to take short subs with this setup and turn the gain quite high so any improvement in the cooling department will make a big difference. The mount is shaky and while 100 sec is ok taking 3min subs is pushing it and more subs get tossed the longer the exposure. Gain on this one was 400... Tested at home, the prototype cooler brought the sensor temperature 16 C below ambient and made a big difference in noise. Uncooled, the sensor gets about 10 C above ambient... For the time being I'm only cooling the housing. I have to get another fan because the current introduces vibrations in the image. Fun project Regarding the spikes, yes I noticed them, I just have to take some time during the full-moon period and align the vanes. No big deal but I have less and less free time.
  3. This was taken during one and a half night from one of the darkest places in Croatia, SQM 21.88 mag/arcsec (out of 22 max) skies. The morning Zodiacal light was very bright from there. Still fighting with the mount and guiding... Orion UK VX10 on an EQ6 ASI178MC in prime focus, ASI120 on 250mm focal length for guiding 2017-08-26, 106x100 sec, SQM-L 21.88
  4. Pelican close-up

    This was taken during one and a half night from one of the darkest places in Croatia, SQM 21.88 mag/arcsec (out of 22 max) skies. The morning Zodiacal light was very bright from there. Still fighting with the mount and guiding... Orion UK VX10 on an EQ6 ASI178 in prime focus, ASI120 on 250mm focal length for guiding 2017-08-25, 110x100 sec, SQM-L 21.88
  5. M27 - Dumbell

    Getting started in astophotography is fun! The mount proves to be a bit shaky, couple that with finderscope guiding and only arund 75% of exposures got stacked. Orion UK VX10 on an EQ6 ASI178 in prime focus, ASI120 on 250mm focal length for guiding 2017-08-20 65x60sec, SQM-L 21.4
  6. To report on the ASI178 framerate and capture settings; A one minute capture produced 19481 frames @ 324fps and 160x120 pixels (resulted from 2x hardware binning) in RAW16 colorspace. The .ser filesize was 713.56 MB This is the only setting I could get the 300+ framerate. Raw8 would hang at smaller resolutions or couldn't produce the 300+ framerate, only about 250 max.
  7. Thanks for the link David. The more I think about it the more I want to try both methods to get results. Both will be challenging... Here's the link I promised. Spoiler!: The study concludes that the Crab nebula isn't a supernova remnant but a result of a head on collision of two massive stars. lempel.pagesperso-orange.fr/un_os_dans_le_crabe_uk.htm And a very fresh study https://www.kth.se/en/forskning/artiklar/new-observations-reveal-crab-nebula-s-polarised-emissions-for-first-time-1.746056
  8. Pillars of creation in M16

    This was my first try with OrionUK VX10 newt and ASI178 on a deepsky object. I bought the VX10 for visual observing but then the dark side took me. I thought that I'll use the ASI178 for planetary work from my homemade EQ platform but than a friend nagged me to put the scope on his EQ6 and try the combination on some close-ups. This is what resulted. Image data: 10" f/4.8 newt 1/10 with lambda primary ASI 178MC prime focus, ASI120MM guiding on a 50mm f/4 ATM guidescope Skywatcher EQ6 36 lights taken @ 176s, 257 gain, 340 brightness, 28 lights used, integration time: 1h22min; 10min total darks, no flat, no bias
  9. Hello from Croatia!

    Thank you all for the kind welcome I see there are 3D printing enthusiasts here too! I've built my printer and it's been a great experience. The learning curve is steep if you start from scratch but there is a LOT to gain.
  10. Hi vlaiv, I was hoping to hear from you. Thanks for the proposal to write the processing software, I have no knowledge in this field and wiill absolutely need your help here. I will test the point 2. and the framerate again tonight and will repot here with the result. An idea: could a planetary stacking software be used for spatial frame alignment and stacking? The whole night capture should be sorted based on timestamp in, say, 11 groups and than each group could be aligned using the pulsar as a "planet" and then stacked. Than the guiding would only need to be excellent during the night and not perfect. Which capturing software and equipment will you use?
  11. Until we acquire the first photons I'd very much like the other participants in this thread, who already offered some software expertise, to join the discussion again and start considering some possible methods of processing the data. In a 3 ms exposure the signal isn't going to be much higher than the noise level which we'll try to combat capturing a great number of frames. The idea is to sort the frames based on which part of the period they represent and then individually stack those 11 groups to produce 11 frames for a 33.5028583ms period of the pulsar. There are many pulsars here in Croatia, they call them lighthouses. They are on the islands so there are crabs near them too
  12. Hi, I'm not sure weather to contribute here or to start a new topic and link this one there. Anyway... I'm resurrecting this topic and call for all interested parties to participate. Me any my friend Lovro have started an attempt to image the M1 pulsar (or is it? More on this later) here in Croatia. Both of us have very limited funds for our projects so we are starting a collaboration between our astronomy club Beskraj and Team stellar (who will provide an AZEQ6 mount) and we hope to receive help here regarding the processing of data from you. I have an OrionUK 10" f/4.8 newt and an ASI178 color which I got from selling my 16" homemade primary, Lovro has an ASI120 and experience in astrophotography, we are still missing an OAG. Also we could ask an acquaintance to lend us his massive AstroPhysics mount if the AZEQ6 proves to be too shaky. I hope to get decent data from the 10", I have regular access to fairly dark skies so that should help. Capturing the data shouldn't be an issue but timing will. I get around 331 fps out of 333 fps for 3ms exposures when testing here at home... Hope to hear from you soon, Marko
  13. Hello from Croatia!

    Greetings everyone! I'm Marko, live in the capital (Zagreb) and an amateur astronomer since 2009. I do hard-core planetary and deep sky observing, public outreach and, recently, imaging, which brings me to this forum. I'm a member of the local astronomy club, Beskraj (Infinitum) ( Here and here )and the local forum (here) My latest, biggest and most challenging astronomy project is to image the M1 pulsar, not only capture it's location within the nebula but to make an image sequence using lucky imaging and later reproduce the variation in an animation. This topic is what brought me here, I can contribute with data but will need help processing. In the meantime I'll be reading the forum and making a post or two. Cheers, Marko
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