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Nick – wanted to say that the presentation style is excellent – the way the speaker is shown, plus the slides. And the way the slide is expanded at times. Sound q very good too.
Whilst it would be great to be there in person, it’s actually a really good experience watching remotely too.
Here is the light curve of the superoutburst until today (observations from the VSS database). No rebrightenings have been seen.
An ATel published yesterday reports that flickering in the light curve of RS Oph ceased during September: https://www.astronomerstelegram.org/?read=14974
This suggests that the recent nova eruption destroyed the accretion disc, as was found following the previous eruption. in that event,it reappeared after 240 days.
LL And has been in outburst for nearly a month, but it is now fading (Gary Poyner had at mag 16.7 last night, Oct 9.965).
However, some rarely outbursting dwarf novae sometimes exhibit rebrightenings (sometimes referred to as echo outbursts). These can occur a few days after the outburst is apparently over. And there can be more than one rebrightening.
Therefore please continue to observe this star. Nightly snapshot observations over the next week or two would be helpful.
LL And is currently around 14th mag and still in the plateau phase of its superoutburst. It is showing small, but elegant, superhumps. Further observations, including t/series photometry welcome.
Hello Darryl,
AF Cyg is a semi regular star with a period of around 3 months. As such, it doesn’t undergo outbursts. Looking at its light curve in the VSS database, it appears to be approaching maximum. Some maxima are brighter than others. It’s brightness range is listed as 6.2 – 7.9 V, although the more usual range is 6.7 – 7.7. One maximum in 2019 reached mag 6.2
Glad to see you are observing this star and contributing your obs to the VSS database.
Paper on H-alpha spectroscopy of the recurrent nova RS Oph during the 2021 outburst on ArXiv today
indeed you are correct: it’s a different Mike Peel, Denis. I’ve been in touch with the MP who took the pic of the meteorite, although he has no further light to shed on the exhibit.
Many thanks to everyone who replied.
Certainly worth having a look at the Egerton exhibition if anyone is visiting Tatton Park. Maurice Egerton was a fascinating character, interested in so many different things. I asked the curator if she had seen anything about an interest in astronomy or telescopes during her PhD research, but she has not come across anything.Certainly a place to visit for a grand day out.
Atel 14838 from a team at Kyoto U report low resolution of RS Oph showing “Fe II, O I, and prominent Balmer lines. All of them listed here have a P Cygni profile. The velocity of the Hβ emission line is ∼ 2600 km/s. The profile and velocity indicate that this outburst is indeed a nova eruption, as is expected.”
Our earlier work suspectEd shallow eclipses. Can we confirm and does the depth vary with outburst status (outburst vs quiescence)?
Looking at the light curve Stewart, there is not much difference. In any case, the objective of the project is to measure the time and duration of each outburst, rather than its precise mag. Thanks for your observation. If you are getting decent signal to noise ratio then stick with the V filter -after all, you are using a decent aperture scope. But no filter allows better SNR, so is often preferable with small telescopes.
