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Me too Paul – following a string of cloudy nights since the outburst, the clouds finally parted. I made it mag 6.4 last night at 21:47 UT in 11x80B
Clear here last night !
Lhires lll 23 micron slit 2400 l/mm grating C14 Atik460 1 x 600s.
Jack
Essex UK
Last night’s attempt at RS Oph using Lhires III with 35um slit and 2400l/mm grating. Five 300 second subs captured through C9.25.
Alun
A beautiful example of what can be achieved with high quality equipment and very compliant weather!
DavidI’d love to. My last attempt was 2021-09-01 and taken through thin cloud. Not so thin, actually, as I needed several 1-minute exposures to get anything measurable. It would normally take a single exposure of somewhere between 2-5 seconds.
Clouds even thicker since then with the same forecast for several days. I hope UK observers have better luck.
The 2021-09-01 observation will be processed and uploaded RSN, honest guv.
Due to collision shock between the white dawrf nova explosion and red giant wind, the growth of very high energy coronal emission lines in the RS Oph spectrum now appears to be in full swing. Would others agree with my identification of these lines in the attached comparison?
Cheers
Hugh
Hi Hugh,
Looks good. I identified the coronal lines lines in a 2006 Star Analyser spectrum using this reference
This time round I’ve used ISIS to make a little animated gif (attached) showing the [FeX] line emerging based on 4 observations between 25th Aug and 11th Sept
Cheers
Robin
Paper on H-alpha spectroscopy of the recurrent nova RS Oph during the 2021 outburst on ArXiv today
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.
A paper by Ulisse Munari and Paolo Valisa on “The 2021 outburst of RS Oph: a pictorial atlas of the spectroscopic evolution. II. From day 19 to 102 (solar conjunction)” has been posted on ArXix: https://arxiv.org/abs/2203.01378
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
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.
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