delta Sco : Still active
Since the last year, this new GCAS-type variable ramains in its bright,
active state
(vsnet-campaign-be 72).
S. Otero reported a further brightening to 1.81 mag on January 21, and
then, the object is considered to experience the third maximum
(vsnet-campaign-be 79).
S. Otero reported that the star is brightened again and the activity
is in agreement with a 72 - 77 day period
(vsnet-campaign-be 107).
He also reported the brightest magnitude of 1.79 on April 27
(vsnet-campaign-be 113).
T. Gandet reported the provisional spectroscopic period of 78.860 +/-
0.0017 days and the other orbital elements obtained through the analysis
of 56 published radial velocities that cover the interval 1903-1975
(vsnet-campaign-be 119,
120).
S. Otero discusses in
[vsnet-campaign-be 122].
about a possibility that the current variation is due to an eclipse of
the ejected ring. T. Gandet also wrote in
[vsnet-campaign-be 123].
that delta Sco's mechanism might be analogue to EN Lac-type and/or Beta
CMa-like.
S. Otero's observations show strong activity of this object in 2001:
After ten days plateau in the early May, the object again experienced
gradual brightening
(vsnet-campaign-be 124),
and then fading started on May 24
(vsnet-campaign-be 131).
The next major brightening came as expected the 78 days ephemeris.
The object reached a peak of V=1.74 on August 7
(vsnet-campaign-be 138).
It faded to 1.86 mag on August 27
(vsnet-campaign-be 139).
A small brightening was reported on Septmber 16
(vsnet-campaign-be 143).
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