[vsnet-alert 24588] Re: MASTER OT J191841.98+444914.5 (UGSU/IBWD) outburst

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

 MASTER OT J191841.98+444914.5 (UGSU/IBWD)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=360162
 
Actually there were two recent (normal) outbursts of this
AM CVn star, according to ZTF and ASAS-SN Sky Patrol data:
on 2020 August 17-19 and on August 23.
A previous normal outburst was observed on 2019 December
12-14. Other outbursts were possibly observed on 2020 April 10
and July 25 (normal one).
 
Clear skies,
Patrick
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     Am Montag, 24. August 2020, 20:15:34 MESZ hat Denis Denisenko d.v.denisenko at gmail.com via vsnet-alert <vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp> Folgendes geschrieben:  
 
 I have found this outburst accidentally while verifying the bright dwarf
novae discovered by MASTER through ZTF Lasair.

MASTER OT J191841.98+444914.5
  20200814.2991  20.7r  ZTF
  20200814.3385  20.5g  ZTF
  20200817.2756  17.03r  ZTF
  20200817.3989  17.06g  ASAS-SN
  20200817.4089  17.12g  ASAS-SN
  20200819.2375  15.41g  ASAS-SN
  20200819.4004  15.40g  ASAS-SN
  20200822.3202  <173g  ASAS-SN
  20200823.1684  16.17g  ASAS-SN
  20200823.2825  16.54r  ZTF
  20200823.3218  16.27g  ZTF

ZTF Lasair data (Masci et al., 2019):
https://lasair.roe.ac.uk/object/ZTF18aavetqn/

ASAS-SN light curve for the last 20 days (Shappee et al., 2014; Kochanek et
al., 2017):
https://asas-sn.osu.edu/light_curves/fd6475cc-3acf-4d3c-9e12-6959a588dfab

P1=0.022076 d, according to Kato et al., 2017PASJ...69...75K.

Links to real-time ZTF Lasair light curves of MASTER dwarf novae brighter
than 15m:
http://scan.sai.msu.ru/~denis/MASTER-ZTF.html

Denis Denisenko