[vsnet-j 2348] (fwd) MisV1181 (possible nova in 2001)

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

(fwd) MisV1181 (possible nova in 2001)

　以下の新星の可能性のある天体(2001)が MISAO project で報告されています。
　かなり深く写っている写真が必要かも知れませんが、特に当時撮影・撮像されて
　いた方はおられませんでしょうか。

Date: Sun, 27 Oct 2002 04:35:49 -0600
From: Seiichi Yoshida <comet@aerith.net>
Subject: [vsnet-chat 5603] MisV1181 = Possible Nova or New Transient Object in 2001

Dear colleagues,

New variable star discovery by the MISAO Project, MisV1181, is a
possible nova or new transient object in 2001.

Here is the information of MisV1181.

MisV1181
  R.A.  22h58m09s.12
  Decl. +66o21'12".4  (2000.0)
  Mag.  12.6-20.6C
  Type  N?

  http://vsnet.aerith.net/misao/data/MisV/MisV1181.gif

John Greaves pointed out that this is a possible cataclysmic variable.

Here are the John's reports:

1. Nothing appears at this position, nor within ~20 arcsecs, in any of
   the GSC2.2, USNO A2.0 or USNO B1.0.

2. Examination of archival survey images sourced via the USNO
   Flagstaff Station Finder Chart Service at:
	http://vsnet.nofs.navy.mil/data/FchPix/cfra.html
   shows no star to plate limit at this position.

3. IRAS 22562+6606 lies approximately 1' North of this position, but
   neither the R nor N archival plates reveal anything near MisV1181
   to be visible, as would be expected from an object red enough to
   have been seen by IRAS.

4. A very preliminary quick look image on Oct 19th 2002, kindly
   provided by Arne Henden, revealed the object to be about V = 19,
   but accurate photometry was hampered by moon and cloud.

We reported this discovery to IAUC as a possible nova or new transient
object in 2001 as follows:

Possible Nova or New Transient Object in 2001

     John Greaves (the United Kingdom), Seiichi Yoshida (MISAO
Project), Nobuo Ohkura (Okayama, Japan) and Ken-ichi Kadota (MISAO
Project) discovered a possible nova or new transient object at R.A. =
22h58m09s.12, Decl. = +66o21'12".4 (equinox 2000.0), in the course of
the Multitudinous Image-based Sky-survey and Accumulative Observations
(MISAO) Project.  It was 12.7 mag on Sept. 19.56 UT, 2001, and faded
to 14.3 mag on Nov. 10.45, 2001, on unfiltered CCD images taken by
Ohkura with 500-mm camera lens.  Nothing appears at this position on
any Palomar plates and Digitized Sky Survey images.  Recent unfiltered
CCD images taken by Toshikazu Muramatsu (Fukushima, Japan) on
Oct. 25.51 UT, 2002, with 0.65-m f/7.1 Cassegrain reflector at
Hoshinomura Observatory, also show it at about 20 mag, via comparison
with R mag in USNO-A2.0.

We request examination of archival images or photographs of this area
in 2001 and 2002. Monitoring of this object would be also welcome.

Best regards,

--
Seiichi Yoshida
comet@aerith.net
http://vsnet.aerith.net/

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