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This sounds an intriguing event, Tim. Thanks for flagging it.
I’m not familiar with RY CrB, so I looked it up.
The Variable Star Index lists it as a semi-regular variable with a range 8.8 to 10.0 in V band. The period is ~90 days.There are no observations of it in the BAA VSS database. There are very few in AAVSO, the most recent being last August at 9.4 visual.
I wonder if the mag 6.7 you cite is an R mag. It is a red star of spectral type M8 to 10 so will appear bright at longer wavelengths as discussed in the R Lyr thread on the Forum.
Hello Bill,
I looked at the BAA VSS and AAVSO data and R Lyr appears to be behaving “normally”, though the most recent data are from a week ago.
It is a semi-regular variable (SRB), spectral type M5, hence red as you found. The amplitude is small: 3.81 – 4.44 V.
The V-I is ~2.5 mag (brighter in IR than visual) – this varies a bit, in time with its overall brightness variations.
I can’t see any spectra in the BAA database.As you say, these meteor cameras can very red sensitive.
Whilst you have your binoculars out (you don’t need such large ones, though these are good to pick up the colour, and you might be able to use naked eye), why not have a go at estimating its brightness to check where its at now? Chart here: https://britastro.org/vss/xchartcat/R%20Lyr%20330%2001.gif
Finally, I note that R Lyr was discovered by the Mancunian, Joseph Baxendell in 1856.
JS
Where would we be without such helpful advice?
I was staying at a Texas ranch a mile off the main road and a local drove along an adjacent unmade track during totality, but at least they had their headlights on!There are several other choice publications on today’s ArXiv listing. I like:
“I’m in AGNi: A new standard for AGN pluralisation”
and
“Multi-Messenger Astrology“Hello Stewart,
I was looking at Mazin Younis’s fine image of the nova (https://britastro.org/observations/observation.php?id=20240316_060436_8e8e3dc829f92b9d) and noticed it was a busy field, yet the VSP chart shows no bright stars that might contaminate the photometry aperture. The nearest is 113, but that’s still a fair distance. What does a visual sense check of the image suggest relative to the comps: 12 or 13.5?
The most recent obs at 13.2V on March 16.792, though that observer seems to report almost a mag brighter than others. What is the time of your observation compare? And just to confirm you deployed a V filter (the nova is much brighter in R).
JS
Here is the relevant part of the painting, from the paper
Attachments:
yes, its a different painting. Apparently monkeys like optics.
Here’s a direct link to the paper: https://arxiv.org/ftp/arxiv/papers/2403/2403.02857.pdfCostantino Sigismondi reports Betelgeuse is dimming and is now as faint as it has been for two years:
https://www.astronomerstelegram.org/?read=16501whilst nothing like as faint as it got during the great dimming of a few years ago, it’s worth keeping an eye on as Orion dips towards the west.
As part of the project, the organising team has prepared an educational package for children about Mary’s life and astronomical interest: https://outsidearts.org/wp-content/uploads/2023/09/MB-Teaching-Resource-Final-Version.pdf
I note from the Historical Section newsletter that Mike Frost will be speaking at the Cheadle event on Friday March 29 at 4pm on “Cheadle Moon, BAA Pioneering Women”.
I’ve not seen any recent imaging or photometry, which I think is why Tom Killestein is calling for observations.
It is located 15″.8 west and 0″.3 south of the center of NGC 6004.
This is a pretty faint SN (mag 17.4 at discovery), so you will need a fairly large telescope and long exposures (minutes). The London skies won’t help, but give it a try – you never know what you might turn up.My Journal arrived this morning. I suppose it might have been delivered earlier, but this is the first Royal Mail delivery in my area this week. We have been lucky to get 3 deliveries a week for the last year. Thank goodness for the digital edition!
You wait ages and two recurrent nova remnant papers come up in the same week!
This MNRAS submission is on the RN T Pyx. The title is “3D physical structure and angular expansion of the remnant of the recurrent nova T Pyx”: https://arxiv.org/abs/2402.07879
The last eruption of T Pyx was in 2011. The remnant has a bipolar structure. The expansion velocity is ~460 km/s.
Couldn’t they pick a more confusing name for the NSR? Thank you very much for the link to ArXiv, Jeremy.
Spot on Max. I tripped myself up over the name a few times!
An MNRAS preprint on ArXiv today (https://arxiv.org/abs/2402.05855) describes the discovery of a nova super-remnant (NSR) cavity surrounding RS Ophiuchi. The team from Liverpool John Moores and Royal Observatory Edinburgh used archival FIR images from IRAS.
An NSR is a vast extended shell surrounding a recurrent nova (RN) formed by the cumulative effect of eruptions sweeping up local interstellar medium. It is speculated that all RNe should result in an NSR, but the only other one confirmed so far is that associated with M31N 2008-12a, in the Andromeda Galaxy, which is the most frequently erupting RN.
