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[vsnet-campaign-dn 3566] V601 Sco brightening?

On Sat, Apr 05, 2003 at 03:30:20AM +1000, Rod Stubbings wrote:
> 
> Visual magnitude estimates by RASNZ members
> object         YYMMDD(UT)   mag  code        remarks
...
> SCOV601        030404.526   146  Stu.RASNZ BRIGHTENED
> SCOV601        030404.703   146  Stu.RASNZ   "  "
... 
> Observer's code:
>   Stu: Rod Stubbings  Drouin,Vic. Australia  32cm Newtonian
 
I wonder what star Rod observed - maybe the very red star 6" WNW of the star
marked on the Downes et al. finding chart (see the comments below)?

I have three recent unfiltered CCD images of this field. On Mar. 13.484 UT
this very red star had been as bright as on Mar. 9.488, but by Mar. 25.393 
it had faded considerably.
 
Regards,
Patrick

-------------------------------------------------------------------------------
Date: Tue, 10 Sep 2002 18:58:48 +0900 (JST)
From: Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>
Subject: [vsnet-campaign-dn 2827] Re: V601 Sco: potential identification problem

Re: V601 Sco: potential identification problem

In [vsnet-outburst 4489]  Kato-san commented: 
>   There is a very red star just west to the real V601 Sco.  It is
> likely this star has been visually detected.

and in [vsnet-outburst 4497] Kato-san commented: 
>    It is possible that Rod actually observed the "true" brightening
> of V601 Sco.  The identification on Downes CV atlas comes from Vogt
> and Bateson, who simply selected a "blue" object near the originally
> reported position. It is possible that the true V601 Sco is a red
> variable, which may be now rising.

  I have examined DSS images in this region, and noticed that the star
6" WNW of the suggested V601 Sco in Downes CV atlas, i.e. the very red
star mentioned above, seems to be indeed a variable.  

  There are 2 images in DSS 1 (SERC quick-V) and 4 images in DSS 2
(AAO SES and AAO SR, all are R images).  The star in DSS 1 images show
a significant change in brightness: 

1988 Apr. 15   V ~ 15.5
1988 Apr. 22   V ~ 14.4

On the other hand, in DSS 2 R images, it does not show such a
significant change; 

1991 Aug. 06   R ~ 12.8
1993 Apr. 20   R ~ 12.8
1997 Apr. 02   R ~ 13.0
1997 Apr. 30   R ~ 13.5

Sincerely,
Hitoshi Yamaoka

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