[vsnet-campaign-nova 132] Re: Possible Nova in Pup: astrometry update

[Gianluca Masi <gianmasi@fr.flashnet.it>]

Dear All,
please consider also the measure I provided in [vsnet-alert 5505]:

R.A.: 07h 37m 56.88s; Decl.: -25d 56' 59.1" (J2000.0)
11 reference stars from USNO A2.0;mean residuals: 0.15"


The position above is definitely the very same as the USNO A2.0 star A0600.06937901 I've
mentioned in [vsnet-alert 5494]. The image has been kindly provided by M Uemura et al.
(Kyoto University).

Regards,
Gianluca

 

Taichi Kato wrote:
> 
> Possible Nova in Pup: astrometry update
> 
>      R.A. (J2000)  Decl.
>   07 37 56.91  -25 56 59.7  H. Abe, GSC-ACT (vsnet-alert 5492)
>   07 37 56.91  -25 56 59.0  G. Masi, Kyoto image, USNO A2.0 (vsnet-alert 5494)
>   07 37 56.880 -25 56 58.89 K. Kadota, GSC-ACT (vsnet-alert 5497)
>   07 37 56.88  -25 56 58.8  A. Henden, UCAC1 (vsnet-chat 3932)
> 
> Arne Henden wrote in [vsnet-chat 3932] as follows:
> 
> As I promised, I've updated the astrometry
> in this field using UCAC1.  The field photometry file at
> http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/npup00.dat
> now has improved astrometry (the photometry remains the same).
> In particular, the nova candidate can be found at:
>   RA (J2000)  DEC         RA          DEC        V     B-V    V-R    R-I
> 114.487000 -25.949680  07:37:56.88 -25:56:58.8  9.090  0.564  0.475  0.758
> 
> There is a UCAC1 star at:
>    RA (J2000)    DEC         mag
> 07 37 56.882  -25 56 58.85  13.60
> 
> So the nova candidate and this star are identical within error
> (less than 100mas).  This is a *very* small magnitude range for
> a nova.

-- 
***********************************************************************
* Gianluca Masi                           "Two things fill the soul   *
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* web:  http://vsnet.eurolink.it/comets/                  I. Kant       *
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