[vsnet-chat 1204] V592 Her: examination of the 1986 outburst data

[Taichi Kato <tkato>]

V592 Her: examination of the 1986 outburst data

   It may be worth recording.  The extraction of the VSOLJ database around
the reported second outburst of V592 Her (1986 May 12):

  YYMMDD(UT)  mag observer
  860422.794 <130 Kat.VSOLJ
  860423.719 <120 Kat.VSOLJ
  860428.662 <125 Kat.VSOLJ
  860429.685 <125 Kat.VSOLJ
  860504.765 <120 Kat.VSOLJ
  860505.526 <125 Kat.VSOLJ
  860506.633 <125 Kat.VSOLJ
  860507.627 <120 Kat.VSOLJ
  860508.662 <120 Kat.VSOLJ
  860509.749 <120 Kat.VSOLJ
  860510.589 <120 Kat.VSOLJ
  860511.780 <125 Kat.VSOLJ
  860512.512 <125 Kat.VSOLJ
  860515.712 <125 Kat.VSOLJ
  860516.491 <125 Kat.VSOLJ
  860517.662 <120 Kat.VSOLJ
  860518.700 <125 Kat.VSOLJ
  860522.488 <120 Kat.VSOLJ
  860525.629 <125 Kat.VSOLJ
  860526.575 <130 Kat.VSOLJ
  860527.562 <120 Kat.VSOLJ

   I am astonished to find that I observed on the very night of that
outburst.  If only I could have better limiting magnitudes! (I mostly
used a 10-cm reflector then).  However, a bright peak reaching mv ~12,
as observed during the current outburst, may be excluded considering the
dense coverage before the reported maximum.  My usual limiting magnitudes
in other fields were ~13 with the 10-cm reflector; the upper limits for
V592 Her were rough (0.5 mag step), conservative values, since there was
no V mag sequence available then.  I remember these exciting nights in
pursuit of P/Halley.

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp