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[vsnet-campaign-be 191] Delta Scorpii strange fading

Date: Sun, 23 Jun 2002 16:54:58 -0300
To: "Be Stars" <be-stars@jiscmail.ac.uk>
From: "Sebastian Otero" <varsao@fullzero.com.ar>
Subject: [vsnet-campaign-be 191] Delta Scorpii strange fading
Cc: "AAVSO DISCUSSION" <aavso-discussion@informer2.cis.McMaster.CA>, <vsnet-chat@ooruri.kusastro.kyoto-u.ac.jp>, <vsnet-campaign-be@kusastro.kyoto-u.ac.jp>
Delivered-To: vsnet-campaign-be@kusastro.kyoto-u.ac.jp
Sender: owner-vsnet-campaign-be@ooruri.kusastro.kyoto-u.ac.jp

There is some important news on delta Scorpii.
Take a look at the recent photometry:


20020615.125     1.77V  Doug West
20020616.065     1.77     Sebastian Otero
20020616.969     1.77V  Brian Fraser (B-V= -0.05)
20020619.049     1.76:    Sebastian Otero
20020619.700     1.89V  Brian Fraser (B-V= -0.06)
20020622.074     1.88     Sebastian Otero

There was an important fading on June 19.
The star wasn't this faint since September 11, 2001. But such a rapid drop
in brightness is strange.

Thom Gandet is analysing the observational data from Brian Fraser, Doug West
and myself and we'll be publishing results soon.
So, keep an eye on delta Scorpii because it is very active.
Spectra are strongly needed.

Regards,
Sebastian Otero.




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