delta Sco: Bright Active State Continues
delta Sco remained at a very bright (~1.7mag) from January to April, 2000
(vsnet-campaign-be
150, 151,
154,
155,
156,
158,
159,
162,
163,
164,
174,
176,
178).
S. Otero reported V=1.67 on April 19, which is brighter than ever before
in its long outburst (vsnet-campaign-be
181, 182).
After the maximum in April, it started gradual fading (vsnet-campaign-be
183). 106 S. Otero reported 1.76mag on May 19 (vsnet-campaign-be
184, 185).
The object again slightly brightened in June. S. Otero reported 1.75, 1.71,
and 1.73 mag on June 1, 3, and 15 respectively (vsnet-campaign-be
186, 189,
190).
The object then suddenly faded to V=1.89 mag on June 19 (vsnet-campaign-be
191, 192).
A possible rebrightening to 1.6mag was reported on June 27, but not confirmed
(vsnet-campaign-be
193, 194).
D. West reported that the spectrum on August 15 showed the H alpha emission
feature (vsnet-campaign-be
199). S. Otero reported 1.91mag on September 10, and that the object
was fading slowly (vsnet-campaign-be
200, 201).
Links:
Light curve provided by S. Otero:
http://ar.geocities.com/varsao/Curva_delta_Sco.htm
[vsnet-campaign-be
181]
Spectrum by D. West:
http://hometown.aol.com/dwest61506/index.html
[vsnet-campaign-be
198, 199]
IBVS paper by Gandet, T., Otero, S., Fraser, B., and West, J. D.:
http://www.konkoly.hu/cgi-bin/IBVS?5352
[vsnet-campaign-be
204]