[vsnet-outburst 26105] NSV11599 = Gaia20fjv: low-amplitude outburst from a W UMa star!

[Taichi Kato]

NSV11599 = Gaia20fjv: low-amplitude outburst from a W UMa star!

   Porb=0.4294162 according to the ZTF catalog.
The system should be similar to 1SWASP J162117+441254.
See https://ui.adsabs.harvard.edu/abs/2018PASJ...70...78K/abstract

   Spectroscopy is needed.

http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia20fjv/

Gaia20fjv	AT2020aavq	2020-11-21 21:16:49	284.21458	53.66913	14.18	15.34	0.53	star	2020-11-24 14:02:39	1.5 mag outburst/flare on a known W UMa-type star, previous events seen

IDs:
2MASS 185651.494 +534009.00 (2000.0) 14.082 13.560 13.358 
185651.4 +534008 (2000.0) ATOJ284.2145+53.6691 CBF c=15.670 o=15.254 P(LS)=0.214635 rms=0.12 
185651.4 +534008 (2000.0) ZTFJ185651.48+534009.0 EW g=15.956 r=15.334 amp=0.416 P=0.4294162 
185651.4 +534008 (2000.0) ZTFJ185651.49+534009.0 g=15.949 (15.205-16.333) P=0.2004 
185651.491 +534008.89 (2000.0) Gaia_DR2_2146590505258818944 plx=1.150(0.029) dismod=9.7 pmra=2.952(0.051) pmdec=-6.473(0.055) G=15.415 BP=15.876 RP=14.774

   ASAS-SN data:
https://asas-sn.osu.edu/light_curves/7be50ff8-ed80-4d73-97ac-2c2ce437f9c1

   Genuine dwarf nova (not flares).