[vsnet-alert 24061] ASASSN-20ce: rebrightening

[Patrick Schmeer pasc1312-aavso@yahoo.de via vsnet-alert]

 ASASSN-20ce (UG)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=1540763

Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S
and Kochanek et al. 2017PASP..129j4502K) light curve and data:
https://asas-sn.osu.edu/light_curves/865b350a-5484-414b-b7f8-cd55969e5de3
 
First maximum on or before February 19. A rebrightening started
on March 4. Second maximum on March 6, then fading (with a dip?).
 
Previous outbursts were recorded by the ASAS-SN Sky Patrol on
2014 Jan. 1, 2015 Apr. 9–15, 2016 Mar. 16–19, and 2017 Mar. 8–13. 
 
ZTF light curve:
https://lasair.roe.ac.uk/object/ZTF19aaejtqe/

Time-resolved photometry is urgently required.
 
Clear skies,
Patrick
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     Am Samstag, 29. Februar 2020, 15:56:21 MEZ hat mkimura <mkimura at kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
 ASASSN-20ce: V364 Lib-type outburst ?

ASASSN-20ce seems to show low-amplitude and infrequent outbursts
like V364 Lib (cf. Kimura et al. 2018c).
https://ui.adsabs.harvard.edu/abs/2018PASJ...70...78K/abstract
This system might include a massive WD and an F-type companion star.
It is now fading but we're trying to obtain some optical spectra of this 
object.
https://asas-sn.osu.edu/light_curves/07dd3646-81ac-4c46-b9eb-e3b164301de2
Photometric monitoring will help this plan.  Also, we may estimate its 
orbital
period if we continue the monitoring during quiescence.
In the quiescent state, this kind of systems should show ellipsoidal 
variations.

- Mariko Kimura