David Swan

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Viewing 20 posts - 41 through 60 (of 302 total)
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  • in reply to: IX Dra: observations requested #583355
    David Swan
    Participant

    I measured IX Dra = 14.926 CV at 2020/11/10 22:33 UT.

    in reply to: IX Dra: observations requested #583351
    David Swan
    Participant

    Conditions in NE England have been terrible over the past week: lots of mist and fog. If the Met Office forecast is right, there may be the odd break over the next few days. I’ll be sure to do measurements if conditions permit.

    in reply to: IX Dra: observations requested #583273
    David Swan
    Participant

    Measured IX Dra at 15.650 CV this evening, 2020/10/22 21:07 UT.

    in reply to: AY Lac #583223
    David Swan
    Participant

    An image of the nova. Lots of stars around here!

    Image details: Centre RA 22h 22m 32.3s,  Dec +50° 23′ 42.5″; Pos Angle +316° 35.2′; FL 196.3 mm; 2.52″/Pixel

    in reply to: Chocolate telescope #583157
    David Swan
    Participant

    Not good for solar, but at least – after a time – you’d be left with a Milky Way leading up to the observatory.

    in reply to: possible supernova in nearby NGC 5002 #582983
    David Swan
    Participant

    About 3deg from Cor Caroli in CVn, for those who don’t speak NGC or can’t be bothered to look it up 😉

    in reply to: Nova in Cas #582982
    David Swan
    Participant

    I took images last night through a V filter and measured a calibrated stack in Maxim (AAVSO X25582AO) 

    N Cas 2020 measured 11.548 CCD-V

    REF 112 set 11.186

    CHK 126 measured 12.599

    in reply to: C/2020 F3 (NEOWISE) #582977
    David Swan
    Participant

    Very nice, Robin. Is there very much in the literature on the spatial distribution of the various components in comets longitudinally through an apparition? If only bright-ish comets coming close-ish to Earth were more frequent…

    in reply to: Nova in Cas #582964
    David Swan
    Participant

    Excellent, thanks Stewart. I’m waiting on clear skies to acquire a low res spectrum of the object. At this brightness, it should be doable with my scope.

    in reply to: Nova in Cas #582946
    David Swan
    Participant

    Thanks Robin, I’ll do as you advise. Here’s a not so egregiously black-clipped image. I’ll have a look at the pixel brightness values to see if I can get anything reliable from the green pane.

    in reply to: Nova in Cas #582944
    David Swan
    Participant

    For some reason the uploaded pic has come out a bit dark. It is, I suspect, something to do with the fact that I saved the image first as a png in Maxim. The file was still a bit large though, so I opened that in Photoshop and did a web compression. I’ll have a look this eve at putting something slightly better up. I also need to test whether the boxcar or the bayer pane setting for flat calibration works best with this particular calibration frame set.

    Anyway, I was keen to have a look at the nova! I am actually planning to revisit low res spectroscopy with the StarAnalyser in a much more rigorous way: dark and flat calibration and then instrument response correction using a standard star at a similar altitude.

    in reply to: Fast moving White Dwarf #582933
    David Swan
    Participant

    Good effort though, Paul. I look forward to seeing the definitive result when conditions have improved.

    in reply to: C/2020 F3 (NEOWISE) #582869
    David Swan
    Participant

    A fascinating object. Friends and passers-by have been out for a look and have been most impressed. I have found that non-regular stargazers, with just help to point them in the right direction, are able to pick it up with the naked eye and notice the fuzziness reaching upwards. Most people favour the view through binoculars (10 x 50s) rather than the telescope (200mm SCT, 32mm Plossl). I am pleased to have been able to pick up the ion tail with just single frames with a DSLR! A greenish tint is also appearing in the coma, as highlighted by Nick James in a recent email.

    in reply to: Fast moving White Dwarf #582830
    David Swan
    Participant

    Thanks Jeremy (although I’m slightly disturbed by the juxtaposition of marmalade and cornflakes). On a hilarious note, please read this article published yesterday:

    https://www.dailymail.co.uk/debate/article-8523421/Has-star-sign-wrong-along.html

    Apparently NASA discovered Oph just a few years ago. And what exactly has C/2020 F3 (NEOWISE) got to do with anything in relation to the rest of the article? A hoot.

    in reply to: C/2020 F3 (NEOWISE) #582795
    David Swan
    Participant

    I’m assuming you are looking for freeware or something not too expensive. Have a look at PIPP.

    https://sites.google.com/site/astropipp/

    Maxim does this sort of thing, but it is expensive.

    in reply to: C/2020 F3 (NEOWISE) #582792
    David Swan
    Participant

    I wanted to enjoy the comet through binos – and I did, so I didn’t take the scope out. But on getting home I noticed the comet was accessible from my yard. Here’s a single 500ms frame taken with the Hyperstar. A very bright sky at 0247 BST, but you can nonetheless make out the bifurcation of the tail clearly (no calibration performed – I would need a new set of calibr frames for these settings!)

    in reply to: C/2020 F3 (NEOWISE) #582787
    David Swan
    Participant

    Good capture of both tails, Martin.

    in reply to: C/2020 F3 (NEOWISE) #582785
    David Swan
    Participant

    Yes. I do really like that pic. The Sony 85mm FE lens is very good. The other image is APS-C crop and digi zoom!

    in reply to: C/2020 F3 (NEOWISE) #582783
    David Swan
    Participant

    A fantastic observing opportunity last night. Clear throughout.

    in reply to: C/2020 F3 (NEOWISE) #582782
    David Swan
    Participant

    Hi Brandx. You might have uploaded the image to the site, but not embedded it into your post. You can also just attach the image file.

Viewing 20 posts - 41 through 60 (of 302 total)