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[vsnet-id-2mass 220] Re: [vsnet-unknown 15] re unknown 13 : AC Sco; AF Sco
- Date: Sun, 30 Jul 2000 22:35:42 +0900 (JST)
- To: vsnet-id-2mass, vsnet-unknown
- From: Taichi Kato <tkato>
- Subject: [vsnet-id-2mass 220] Re: [vsnet-unknown 15] re unknown 13 : AC Sco; AF Sco
- Sender: owner-vsnet-id-2mass@kusastro.kyoto-u.ac.jp
Re: [vsnet-unknown 15] re unknown 13 : AC Sco; AF Sco
> A quick look for AC Sco reveals the image size is immense & seriously
> overexposed in _all_ bands! It could be difficult to give a true
> magnitude in such cases, and I believe there is an upper brightness
> limit to 2MASS due to such problems...
>
> ...
>
> AF Sco appears to be an even worse case! These stars are _red_!
Okay, these two stars are completely lacking in USNO, so they look
likely to break the record of largest (2MASS)-(USNO) color indices ;-)
[Since most of highly overexposed stars are recorded in 2MASS PSC,
there may be a special reason why these stars or fields were avoided
simply because of saturation].
Regards,
Taichi Kato
vsnet-adm@kusastro.kyoto-u.ac.jp
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vsnet-adm@kusastro.kyoto-u.ac.jp
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