[vsnet-chat 867] Re: Magnitude Estimates for Current SNe

[Taichi Kato <tkato>]

Re: Magnitude Estimates for Current SNe
>      As a for instance, here are the V magnitudes and the GSC magntiudes
> for the fainter stars in GSPC sequence S506 mentioned by Berto:
> 
> star    V      GSC 
> C     11.09   11.76
> D     12.04   12.41
> E     13.34   13.96
> F     14.14   14.84
> G     14.58   15.36

   It might be interesting to add USNO A1.0 values

          GSPC             USNO A1.0
star    V    B-V    GSC     r    b    b-r   V*
C     11.09  0.89  11.76  10.2  12.1  1.9  10.9
D     12.04  0.55  12.41  12.0  12.5  0.5  12.2
E     13.34  0.85  13.96  13.3  14.7  1.4  13.8
F     14.14  1.07  14.84  14.0  15.4  1.4  14.5
G     14.58  1.02  15.36  14.3  16.0  1.7  14.9

   V*, calculated by r + 0.375(b-r)

   The results demonstrates USNO A1.0-based magnitudes, at least for this
field, better represents V (than GSC).

Regards,
Taichi Kato

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