[vsnet-alert 18858] ASASSN-15mu past outburst in NEAT data

[Denis Denisenko]

Following the discovery report of this possible dwarf nova in Pegasus
by ASAS-SN (ATel #7809) and [vsnet-alert 18856, 18857] I have checked
archival NEAT images available from SkyMorph website at
http://skyview.gsfc.nasa.gov/skymorph/obs.html (S. Pravdo et al.).
There was a previous outburst in October 2001:

ASASSN-15mu
  20010925.2395  17.54CV  NEAT
  20010925.2607  17.46CV  NEAT
  20010925.2816  17.46CV  NEAT
  20011006.1993  14.12CV  NEAT  Outburst!
  20011006.2098  14.11CV  NEAT
  20011006.2203  14.12CV  NEAT
  20011013.1613  17.01CV  NEAT
  20011013.1822  17.02CV  NEAT
  20011013.2032  17.14CV  NEAT

I was using nearby CSS J225229.5+102138 (1.5' NNW of the variable)
with the unfiltered magnitude CV=13.9 as a reference star.

Denis Denisenko
Sternberg Astronomical Institute of Moscow State University