[vsnet-alert 13443] Re: [vsnet-outburst 12948] delta Scobrightening?

[Bernard Heathcote]

This binary system's next periastron (an eleven year cycle) is expected 
around 5 July and this long anticipated event is being monitored by amateur 
spectroscopists in Europe and Australia. The expected radial velocity 
speed-up as the secondary approaches the B0.3IV primary has been 
spectroscopically detected and the increasing accretion disk interaction is 
related to the increasing brightness.

Cheers,
Bernard Heathcote

-----Original Message----- 
From: Sebastián Otero
Sent: Tuesday, June 21, 2011 10:46 AM
To: vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp ; vsnet-alert at yahoogroups.com 
; vsnet-campaign-be at ooruri.kusastro.kyoto-u.ac.jp ; 
vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp ; 
vsnet-outburst at yahoogroups.com
Subject: [vsnet-alert 13442] Re: [vsnet-outburst 12948] delta 
Scobrightening?

It's been that bright for a long time. It's not unusual.
http://varsao.com.ar/delta_Sco.htm

Cheers,
Sebastian.


----- Original Message ----- 
From: "Taichi Kato" <tkato at kusastro.kyoto-u.ac.jp>
To: <variable_star_forum at yahoogroups.com>;
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>; <vsnet-alert at yahoogroups.com>;
<vsnet-campaign-be at ooruri.kusastro.kyoto-u.ac.jp>;
<vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp>;
<vsnet-outburst at yahoogroups.com>
Sent: Monday, June 20, 2011 9:27 PM
Subject: [vsnet-outburst 12948] delta Sco brightening?


> delta Sco brightening?
>
>  Delta Sco has been reported to be unusually bright.  Confirmation is
> requested.
>
>  YYYYMMDD(UT)   mag  observer
>  20110409.801    23  (Masashi Nakatani)
>  20110413.797    23  (Masashi Nakatani)
>  20110416.799    22  (Masashi Nakatani)
>  20110530.580    23  (Masashi Nakatani)
>  20110612.951  1.84CV  (Thomas Karlsson)
>  20110619.906    16  (Jose Ripero)
>


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