[vsnet-alert 24531] ASASSN-20jx = ZTF20abrubfr - large-amplitude 15m object in Cygnus

[Denis Denisenko d.v.denisenko@gmail.com via vsnet-alert]

Almost simultaneous detection by ASAS-SN (Shappee et al., 2014; Kochanek et
al., 2017) and ZTF (Masci et al., 2019).

ASASSN-20jx = ZTF20abrubfr
  20200811.4134  <20.1g  ZTF  Last non-detection
  20200813.3009  15.25r  ZTF
  20200813.3222  14.98g  ZTF
  20200813.3331  15.08g  ASAS-SN
  20200813.3344  15.12g  ASAS-SN
  20200813.3356  15.12g  ASAS-SN

ASAS-SN LC:
https://asas-sn.osu.edu/light_curves/4c6f91d4-f73c-4120-9e70-b1b75cdbe21b
(last 20 days)
ZTF LC: https://lasair.roe.ac.uk/object/ZTF20abrubfr/

Position: 19 23 16.00 +52 26 10.6 (from ZTF), in the north-western wing of
Cygnus, 18.5' to the south from V1113 Cyg.

Color-combined DSS finder chart:
http://scan.sai.msu.ru/~denis/ASASSN-20jx-BRIR.jpg

Quoting ZTF: "The transient is possibly associated with an r=23.85 mag
uncertain found in the PS1 catalogue."

Outburst amplitude about 8 magnitudes implies a good WZ Sge-type candidate.

Denis Denisenko