[vsnet-alert 25187] ASASSN-21aa - large-amplitude object

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

This outburst was also detected by Zwicky Transient Facility (Masci et al.,
2019). ZTF Lasair light curve and snapshots:
https://lasair.roe.ac.uk/object/ZTF21aaadtpw/

ZTF21aaadtpw = ASASSN-21aa
  20201227.2851  >19.8r  ZTF last non-detection
  20210102.1647  15.30g  ZTF
  20210102.2259  15.63r  ZTF
  20210104.1815  15.99r  ZTF
  20210104.2266  15.70g  ZTF

Images show that the fainter star (about 22.5m) which is not in the PS1
catalog went into an outburst. The g=20.0 star mentioned on ASAS-SN
Transient website is 4" South of the variable.

Denis Denisenko