[vsnet-alert 25434] DDE 163 = 1RXS J185013.9+242222 outburst

Denis Denisenko d.v.denisenko@gmail.com via vsnet-alert vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp
Mon Feb 22 18:00:00 JST 2021


This dwarf nova in Hercules is in bright outburst according to ZTF Lasair
data (Masci et al, 2019):

DDE 163 = 1RXS J185013.9+242222
  20210211.5305  19.46g  ZTF
  20210217.5432  15.87r  ZTF
  20210217.5463  15.94r  ZTF
  20210218.5326  16.21g  ZTF
  20210221.5332  14.56r  ZTF

https://lasair.roe.ac.uk/object/ZTF18abikbmj/

Coordinates: 18 50 13.38 +24 22 20.0

A bright outburst was observed (but not detected as a transient) by ASAS-SN
in 2015 Feb. 17-20. Then there was another outburst in June 2019, see
[vsnet-alert 23303] and [vsnet-alert 23306] . Tonny Vanmunster has observed
the star for 3.5 hours on 2019 June 9/10. The light curve shows a hint of
0.06 d variations with an amplitude of 0.2m. Follow up observations are
encouraged.

Denis Denisenko


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