[vsnet-chat 4754] Re: Suspect nova star in Lyra

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear Toni,

Please move to vsnet-chat.

>Those are the coordinates of the two stars pointed from the arrow in
>my images.

Which images are you referring?  Are they on
http://digilander.iol.it/infosis/homepage/suspectnova.html ?

>Brigth star : 18 53 05.810 +33 35 43.22 m1=10.848/0.92
>
>The second star is one of the following three stars visible on DSS II
>generation image:
>
>USNO A2 18 53 05.575 +33 35 55.72 m1=13.80/0.25
>USNO A2 18 53 06.014 +33 35 35.45 m1=14.40/0.25
>USNO A2 18 53 05.837 +33 35 16.94 m1=15.80/0.25

Yes, they are combined and shown bright in your image.  These red
magnitude (from red-sensitive plate) of USNO-A2.0 are surely
underestimated because of the condition of the KPNO plate (have you
seen the DSS-1 red image of this region?).  The blue magnitudes for
these stars in USNO-A2.0 are 12.3, 13.3, and 14.3, respectingly, and
the last one is included in the GSC catalog (GSC mag = 13.36).  

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

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