13 August 2021 at 1:34 pm #584603Paul G. AbelParticipant
Finally saw it- I used my 10x50mm finder last night, I made it magnitude 6.313 August 2021 at 2:28 pm #584604Derek HuftonParticipant
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 11x80B17 August 2021 at 12:32 pm #584605
Clear here last night !
Lhires lll 23 micron slit 2400 l/mm grating C14 Atik460 1 x 600s.
Essex UK24 August 2021 at 10:59 am #584626Alun HalseyParticipant
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.
Alun25 August 2021 at 8:02 am #584627
Last night Lhires111 23 micron slit 2400 l/mm grating C14 Atik460 10 x 600s.
Essex UK28 August 2021 at 8:34 am #584629
Last night Lhires111 23 micron slit 2400 l/mm grating C14 Atik460 3 x 600s.
Essex UK3 September 2021 at 9:09 am #5846423 September 2021 at 9:17 am #584643David BoydParticipant
A beautiful example of what can be achieved with high quality equipment and very compliant weather!
David3 September 2021 at 9:50 am #584644
Please continue to observe RS Oph – the eruption continues:3 September 2021 at 7:16 pm #584646Paul LeylandParticipant
I’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.17 September 2021 at 5:29 pm #584686
What is the cause of the narrowing of the ha line?
Jack20 September 2021 at 10:31 am #584709Hugh AllenParticipant
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?
Hugh20 September 2021 at 1:25 pm #584712Robin LeadbeaterParticipant
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
Robin24 September 2021 at 4:12 pm #584725
Paper on H-alpha spectroscopy of the recurrent nova RS Oph during the 2021 outburst on ArXiv today24 September 2021 at 4:42 pm #584728
Declining, but not back at quiescence (minimum) yet.5 October 2021 at 10:46 am #584762
My latest spectrum showing interesting changes.16 October 2021 at 10:53 pm #584794
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.10 March 2022 at 11:15 am #608504
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/2203.0137825 July 2022 at 3:07 pm #611577
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
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