[vsolj-alert 561] V893 Sco outburst

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

　以下の通り、今シーズン最初のアウトバーストで、この２年で観測された中では
　明るいものです。

　天体の位置：

USNO0600.11409621 161515.153 -283730.07 (2000.0) 11.6 15.7
161516.2 -283712 (2000.0) 1RXS161516.2-283712 0.346 0.94 0.53
161515.1 -283730 (2000.0) SCOV893 * UG: 10.6 14.5 P - - - R1/SCO6

V893 Sco outburst

    The (grazing) eclipsing dwarf nova below the period gap is in outburst,
as indicated by the following observations.  The present outburst is the
first one in this season, and is one of relatively bright ones recorded
recently.  (Southern) observers are strongly urged to obtain time-resolved
photometry of this object.  The object had long been lost, and was
recovered by K. Haseda (vsnet-alert 1543, 1545, 1565, 1637, 1647; summarized
in IBVS 4585).  The spectroscopic confirmation (vsnet-alert 1688), which
finally led to the discovery of the eclipsing nature (vsnet-alert 3432).
Other useful information in IBVS 4749 (Thorstensen) and PASP 112, 237
(Bruch et al.)

  YYYYMMDD(UT)   mag  observer
  20000212.665   141  (R. Stubbings)
  20000212.819   145  (A. Pearce)
  20000214.711   142  (R. Stubbings)
  20000215.724   142  (R. Stubbings)
  20000217.110   148  (B. Monard)
  20000217.755   140  (R. Stubbings)
  20000221.812  13.71V  (S. Kiyota)
  20000222.714   137  (R. Stubbings)
  20000224.806  14.30V  (S. Kiyota)
  20000227.598  <130  (R. Stubbings)
  20000228.833  14.60V  (S. Kiyota)
  20000229.628   139  (R. Stubbings)
  20000303.806  14.50V  (S. Kiyota)
  20000304.683   142  (R. Stubbings)
  20000306.812   145  (A. Pearce)
  20000307.745   128  (R. Stubbings)
  20000307.806   126  (A. Pearce)

　日本で見える食の予報です。本日 27h台(29h台)のものが好条件です。その後も
　一晩に２回ぐらい条件がよい食があります（もちろんsuperoutburstに移行する
　可能性があるため、全位相の観測が望まれますが）。

  20000308 25:28:41   9
  20000308 27:18:04  22
  20000308 29:07:26  27

  20000309 25:10:34   7
  20000309 26:59:56  21
  20000309 28:49:18  27

  20000310 24:52:26   4
  20000310 26:41:48  19
  20000310 28:31:11  27
  20000310 30:20:33  24

  20000311 24:34:18   2
  20000311 26:23:40  18
  20000311 28:13:03  26
  20000311 30:02:25  25

  20000312 26:05:32  16
  20000312 27:54:55  26
  20000312 29:44:17  26

  20000313 25:47:24  14
  20000313 27:36:47  25
  20000313 29:26:09  26

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