[vsnet-alert 4726] CI Aql recurrence (Yamaoka)

[Taichi Kato <tkato>]

From yamaoka@rc.kyushu-u.ac.jp Sun Apr 30 17:02 JST 2000
Date: Sun, 30 Apr 2000 17:01:59 +0900 (JST)
From: Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>
To: dgreen@cfa.harvard.edu
Subject: Re: novalike object near CI Aql
Cc: yamaoka@rcsvr.rc.kyushu-u.ac.jp, tkato@kusastro.kyoto-u.ac.jp,
        ayani@bao.go.jp
Content-Type: text
Content-Length: 952

Dear Dan,

  I have performed further astrometry with the other image, which
reveals that the identification with CI Aql is completely firm.

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PROBABLE NOVA IN AQUILA = the recurrence of CI Aql

  H. Yamaoka, Kyushu University, reports the accurate position of 
the probable nova in Aquila (IAUC 7409), measured with the 
unfiltered CCD image taken with Bisei 1.01-m telescope by K. Ayani, 
Bisei Astronomical Observatory, and K. Shirakami, Okayama, Japan, as 
R.A. = 18h52m03s.55, Decl. = -01o28'38".9 (equinox 2000.0, 
uncertainty around 0".2).  This position is nearly identical to that 
of the eclipsing binary, which was proposed to be the quiescent 
counterpart of the suspected nova 1917 (IBVS 4338 and Duerbeck 1987, 
SSR, 45, 1).  It is strongly suggested that the suspected Nova Aql 
1917 = CI Aql was real and the ongoing eruption is the recurrence of
it. 

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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