Jeremy Shears

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Viewing 20 posts - 141 through 160 (of 573 total)
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  • in reply to: CG Dra: a VSS campaign #612490
    Jeremy Shears
    Participant

    Good to hear the clouds have finally parted, Max.

    in reply to: CG Dra: a VSS campaign #612311
    Jeremy Shears
    Participant

    Thanks Max. A very petite eclipse!

    in reply to: CG Dra: a VSS campaign #612205
    Jeremy Shears
    Participant

    Looks like normal service has been resumed, Max! 👍🏻

    in reply to: CG Dra: a VSS campaign #612185
    Jeremy Shears
    Participant

    Nice to see you continuing despite the inclement wx, Max.

    in reply to: Project Apollo #612148
    Jeremy Shears
    Participant

    The digitally remastered images are truly remarkable

    in reply to: CG Dra: a VSS campaign #612087
    Jeremy Shears
    Participant

    Impressive set up, Max. Looks very reliable indeed.

    in reply to: CG Dra: a VSS campaign #612083
    Jeremy Shears
    Participant

    Welcome back, Max. I was getting worried! Good to see that data have been collected in the meantime

    in reply to: CG Dra: a VSS campaign #611928
    Jeremy Shears
    Participant

    Yes, probably poor transparency and moonlight interference, Max.

    in reply to: CG Dra: a VSS campaign #611875
    Jeremy Shears
    Participant

    Interesting to see them superposed on the brightening trend line

    in reply to: CG Dra: a VSS campaign #611858
    Jeremy Shears
    Participant

    That is a dramatic eclipse Max! Seems to be enhanced by the preceding hump.

    in reply to: CG Dra: a VSS campaign #611844
    Jeremy Shears
    Participant

    Looks slightly shallower, as expected, Max

    in reply to: CG Dra: a VSS campaign #611811
    Jeremy Shears
    Participant

    I see the dilemma, Max (also shows rage pitfalls CV observers can get into with less than ideal data). If you can confidently and consistently compensate that would be the way to go (sorry!). In any case, it would be important to identify those eclipses where there is some kind of uncertainty in assignment of type.

    Jeremy Shears
    Participant

    Interesting to see JWST papers already appearing: https://arxiv.org/abs/2208.01630

    This one on flattened disc, reddened galaxies.

    No doubt a trickle will soon become a torrent

    in reply to: CG Dra: a VSS campaign #611714
    Jeremy Shears
    Participant

    They may even be a fraction deeper that’s the last pair, Max. Asymmetric, as before, as you noted, perhaps steeper entry…

    in reply to: CG Dra: a VSS campaign #611646
    Jeremy Shears
    Participant

    Those 2 look very similar indeed! Slightly quicker fade than recovery

    Jeremy Shears
    Participant

    This is excellent news – thanks for sharing the link, Ronan.

    in reply to: CG Dra: a VSS campaign #611625
    Jeremy Shears
    Participant

    Would need to think about that Max 🙂
    It’s great fun having these speculations. We’d probably not be in the position to do so with your intense and precise data.

    in reply to: CG Dra: a VSS campaign #611615
    Jeremy Shears
    Participant

    Superhumps are characteristic of a DN superoutburst. There are indeed caused by the AD becoming elliptical. So there would need to be a series of humps, the period of which would be slightly longer than Porb. Have you measured the “hump period” to check that it is consistent with the eclipse period?

    in reply to: CG Dra: a VSS campaign #611613
    Jeremy Shears
    Participant

    Those data are truly remarkable regarding their precision, Max. I suppose technically this is a bright outburst (no superhumps modulated with the Porb, which is too long to be a UGSU system).

    I wonder if there is any way of probing (or estimating) how much of the disc goes into outburst. There is an idea that only part of the AD goes into outburst, resulting in these “stunted” outbursts. I therefore wonder if the eclipse width of this bright outburst is wider. Or perhaps this current outburst is a “normal” one, like the one 5 outbursts ago at the beginning of your second plot above, the intervening 4 being “stunted” outbursts……

    in reply to: Recurrent Nova RS Oph #611577
    Jeremy Shears
    Participant

    I can’t believe its almost a year since the RS Oph eruption!

    An MNRAS pre-print on the “Study of 2021 outburst of the recurrent nova RS Ophiuchi: Photoionization and morpho-kinematic modelling”, on ArXiv today, presents the evolution of the optical spectra of the eruption, includes amateur spectroscopy and photometry: https://arxiv.org/abs/2207.10473

Viewing 20 posts - 141 through 160 (of 573 total)