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swag72

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Posts posted by swag72

  1. 25 minutes ago, tooth_dr said:

    Sara I was actually looking on your website yesterday, some stunning images!  I was trying to remember what filters you used in your filter wheels, iirc you have two mono cameras?

    In terms of pricing, a % of the new price is a good start, but in some cases this doesn’t work if the technology has moved on or trends have changed eg CCD versus CMOS.  

     

    I've got 1.25" Astrodon filters in 2 cameras and Chroma in another.  

  2. I am perhaps not considered in an ideal position to agree with this statement as I live in Spain and have more clear nights in general than in the UK, but bear with me. 

    I imaged with one scope for a number of years and to get sufficient data for an image it was taking me many nights. Then I went to another wider scope, so I could get different data each night and widen my data capture. Hell I thought, I can get a dual set up now on the wide field and get images even quicker. Hey presto! So on an average 8 hour night with three scopes running I was getting in excess of 20 hours data a night. Great!

    Then I got data overload and frankly it has to date killed any interest in imaging for upwards of a year. I got so much data and it ended up consuming my life to such an extent that I have less than zero interest. Observatory hasn't been opened in over a year, no processing for equally as much time. Will I ever find the mojo again? I really don't know. I tried to tell myself to just go back to one scope and plod on with the data and perhaps get my love of the hobby back again, but it just didn't interest me. 

    I guess what I am saying is that had I not been so greedy and wanting, perhaps I'd still be going with my one scope and enjoying the capture and processing. Had my imaging and data been more limited then I believe I would  still have had an interest. 

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  3. I went for 2 mono camera's. In one camera I have a full set of LRGBHSO filters. The other camera only has a 5 position filter wheel so I thought carefully about what to put in there. I settled on Luminance and Ha to start with. Then realised that an additional O3 filter would help..... and that's where I've stopped. It works well. My scopes and camera's are the same focal length and chip so I use a JTD saddle to align them exactly. It works well.

  4. I use one PC for my dual rig...... The cmaera's are different (QSI and Moravian) so there's no confusion about drivers. I have 2x Lakeside auto focusers, and hey run fine as there's a driver for running two together. I've never had a problem with any type of conflict and everything runs perfectly.

  5. Maybe one last query then if I may......... Thank you for all our help so far, it's been invaluable 🙂

    In this link where I have had to go to the CDS portal as nothing showed in Simbad........ The Aladin screen shows the item of interest in the crosshair, but how do I know what THAT actually is? 

    • 2MASX J15100535+0943230 (Galaxy)
    • 2MASX J15104417+0942270 (Galaxy)
    • 2MASX J15100704+0957160 (Seyfert 2 Galaxy)
    • SDSS J151025.65+100414.2 (Quasar)
    • 2MASX J15105281+0955349 (LINER-type Active Galaxy Nucleus)
    • SDSS J151012.48+095722.4 (Brightest galaxy in a Cluster (BCG))
    • SDSS J150958.95+094939.2 (Quasar)
  6. My next dilemma then is the following..... Using Aladin I have come up with so many pages where I really don't know what I'm looking at. For example this link - What is the 'thing' I am looking at on this linked page? I can't see anywhere a simple 'this is a galaxy' or something else.......

    I think I'm a bit simple minded to be able to sort all of this out! Scientifically the words, figures etc just mean nothing to me whatsoever.....

  7. 9 hours ago, wimvb said:

    I use Simbad and search either by id or by coordinates. To find pgc galaxies, I replace 'pgc' by 'leda'. 

    http://simbad.u-strasbg.fr/simbad/sim-fid

    Once I find something, I use the Aladin light link for a visual search. In Aladin I activate simbad.

    I've used Simbad and Aladin on this.... it's quite a manual way of doing it, I was rather hoping that there was a quasar catalogue then that I could download into PI to annotate if there's anything there.

  8. 6 minutes ago, wimvb said:

    The yellow ones are a mixture of quasars, "active galaxy nuclei", and plain galaxies. Some probably a few Gly distant.

    Ooooo..... how exciting. How would I know what were what? I tried a couple of the quasar catalogues that Brendan linked to but nothing came up...... Any ideas? I wouldn't even have considered quasars.... I need to go and do some reading about what they even are LOL!!!! :) 

  9. I am a little confused and have spent hours on the net trying to cross reference all sorts to try to get the answer..... I hope someone can help.

    I have taken the following image and annotated it using the Hyperleda catalogue as well as the PGC catalogue. As you can see the PGC catalogue shows the larger galaxies (as did the Hyperleda catalogue). The Hyperleda also shows loads more galaxies with nothing more than a numerical designation. I have tried to find these in the Simbad database, but they don't show up at all. I've also looked at Aladin and some of these have an SDSS designation that has no bearing on the numbers that have come from the annotated image. 

    Can anyone throw some light on this please? How can I find these on Simbad for example when it doesn't give me anything for the numbers alone.

    _780_ARMENIA_2020_layered annotate.jpg

  10. 15 hours ago, Midnight_lightning said:

    That's interesting, so if I understand correctly I could run my 20 minute NB on the guiding OAG/Scope and the 5 minute RGB on the tandem scope - and just accept that only 3 of 4 RGB's will be usable - still not a bad return.

    Yes, I haven't looked at weight issues yet but will also be buying another mount - was anticipating an EQ6R-Pro for a single scope but two might be pushing it.

     

    I have a dual rig and I run SGPro with it. You cannot run an OAG in the system as while you are refocusing for example you either need to switch off the guiding or you will have a guiding trace all over the place while the auto focus runs as that will take the guide star in and out of focus.

    I don't see the issue with not being able to dither either, as I either combine a mixture of the two rigs - rejection algorithms will sort out any issue there in stacking or I use a bad pixel map..... hey presto. I think that trying to synchronise two rigs so that their subs end together so that a dither can take place would waste too much time potentially. 

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