David Swan

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Viewing 20 posts - 241 through 260 (of 316 total)
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  • David Swan
    Participant

    I believe the close approach was June this year (2018), so we’ve missed the best of it. It is low down in Capricornus now, and dimmer than mag 16, but I might have a go if I get a really clear southern sky.

    in reply to: C/2017 S3 #579711
    David Swan
    Participant

    The coma looks like it has expanded significantly since last night. Still bright and quite something.

    in reply to: Videos of the Warwick Meeting #579710
    David Swan
    Participant

    Thanks very much Dominic – and Andy.

    in reply to: C/2017 S3 #579707
    David Swan
    Participant

    Looking quite spectacular as a big fuzzball moving through the star field.

    in reply to: interesting free astronomy software #579705
    David Swan
    Participant

    Thanks for pointing this out. I’ll have a look. David

    in reply to: Nova Scutum 2018 #579675
    David Swan
    Participant

    Thanks for pointing out this object. I have been wanting to have a look – and get a low res spectrum with my StarAnalyser – but cloud has been rolling in from the sea night after night after night!

    in reply to: Transient AT2018cow #579649
    David Swan
    Participant

    For anyone who is interested, here is a link to a new ATEL where the authors discuss photometry and spectroscopy of this transient. Not definitively a broad-lined type Ic supernova – previously, Robin raised uncertainty about this classification too.

    http://www.astronomerstelegram.org/?read=11776

    in reply to: Royal Observatory Greenwich #579648
    David Swan
    Participant

    Yes, I am sure that is right! It will be interesting to see what happens. There was a suggestion of spectroscopy in the article too, wasn’t there? As well as giving people a peek through the scopes at bright targets, I think the operators should deploy the latest EAA software for showing essentially-live pics to a wider audience. Lucky imaging of planets and near-live imaging of asteroids, comets, globulars etc is possible even from that location. I know from my interactions with the public that people are amazed by what’s possible now with the right hardware and software.

    in reply to: Transient AT2018cow #579640
    David Swan
    Participant

    This object has gone ‘mainstream’, with articles in New Scientist (and the Daily Mail). The New Scientist article has a floating cow superimposed on a star field, in reference to the transient ID.

    https://www.newscientist.com/article/2172351-weve-just-seen-a-huge-space-explosion-and-dont-know-what-it-is/

    in reply to: SUN 21/6/2018 #579637
    David Swan
    Participant

    An excellent image Peter – seems fitting that there should be one of the sun posted up here at the summer solstice. And there are a few active regions visible on the sun too, which is a bonus.

    in reply to: Transient AT2018cow #579631
    David Swan
    Participant

    Thanks Robin. I didn’t know that a CV in outburst has that spectral appearance. Hopefully with further work things will get cleared up as much as possible.

    in reply to: Transient 2018bsr #579514
    David Swan
    Participant

    Thanks Robin – makes sense.

    in reply to: 2010 WC9 #579486
    David Swan
    Participant

    Very nice. In the medium term I think I’ll look at buying a short focal length refractor. It is lovely to have a wide field of view.

    in reply to: 2010 WC9 #579483
    David Swan
    Participant

    In addition to the maximum stacked image on my member’s page, I have created a short video from the same frames. It runs at 5fps. https://1drv.ms/u/s!Agvxu8wNOxpAcskxKKX5lQZyCh4

    in reply to: Nova in Perseus #579476
    David Swan
    Participant

    I’ll be looking as often as I can. I had trouble getting access to this patch of sky too!

    in reply to: Nova in Perseus #579474
    David Swan
    Participant

    V392 Per is noticeably dimmer than the nearby TYC star now. Here’s an image from this eve (13 May) – UV/IR block only. Time in filename is UT. I have measured the mag as 9.8 (CV).

    in reply to: Nova in Perseus #579473
    David Swan
    Participant

    I am perhaps extending this frivolous sidetrack beyond its natural life … notwithstanding this, the New Scientist for a long time ran letters on nominative determinism in its Feedback section. Weedon and Splatt published lots of urology research.

    in reply to: Nova in Perseus #579416
    David Swan
    Participant

    I took some frames through the StarAnalyser 100 this evening. I’m pleased to see that my spectrum looks very like yours – the expert’s – but of course mine is lower res. The Halpha emission was indeed striking in the images!

    David Swan
    Participant

    Thanks Robin. Hopefully the nova will remain bright enough till the weekend for me to deploy my C8 + StarAnalyser on it. I was a bit tired yesterday to attempt some low res spectroscopy. Your stuff looks great – I look forward to seeing how the spectrum evolves.

    in reply to: HUGE sigh of relief #579401
    David Swan
    Participant

    Unfortunately my experience is that fate is rarely on my side on these sorts of matters!

Viewing 20 posts - 241 through 260 (of 316 total)