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THE ASTRONOMER Electronic Circular No 3693      2022 Mar 30 13.09UT
Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise,  Basingstoke,
Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074
INTERNET: GUY@TAHQ.ORG.UK             Backup: guy_hurst@hotmail.com
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RS OPH

D. Marchev, N. Pavlova (Shumen University), R. Zamanov (Bulgarian
Academy of Sciences) report in ATEL #15296:

The latest outburst of the recurrent nova RS Oph occurred in  August 2021. The 
time of the eruption is estimated to be at  JD2459435.0  = 2021 Aug 08.50 
(Munari & Valisa, 2021, arXiv:2109.01101).  

The performed photometric observations of RS Oph in Sloan g', r' and i’ 
bands with the 40 cm telescope of the Shumen University "Episkop K. 
Preslavski", Bulgaria (Kjurkchieva et al. 2020, BlgAJ, 32, 113)  on 2022 March 
24. We have not detected flickering on minute-to-hour time scale with 
amplitude greater than 0.04 mag.  

At quiescence RS Oph exhibits variability on minute-to-hour time scale with 
amplitude 0.2-0.3 mag in B band. This variability disappeared after 2006 and 
2021 outbursts, as a result of the destruction of the accretion disc by nova 
outburst. The photometric data presented by Worters et al. showed evidence of 
the resumption of optical flickering by day 241 of the 2006 outburst.  

Their observations indicate that the accretion is not  reestablished by day 
227 of the 2021 outburst. 
We expected that the flickering should  appear in the next  30 days.  

Fig. 1  Optical flickering from RS Oph  is still missing. : 
https://www.astro.bas.bg/~rz/ATel/RSOph.20220324.Shumen.eps

Guy M hurst

