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VSNET campaign target list (2003 June 11)
*** VSNET campaign selected current target list 2003 June 11 ***
Object Class Position Type State Data Remark
======================================================================
GO Com 1 northern UGSU definite (rare) 1 (1)
evening to superoutburst!!
midnight complex period behavior
V803 Cen 1 southern HeDN superoutburst! 1 (2)
now oscillating
IM Nor 2 southern NR+E: mag about 17.0 2 (3)
V504 Cen 2 southern NL(VY) new target, mag 13 1 (4)
PU CMa 3 southern, UGSU post-superoutburst
early evening mag about 14-15 1 (5)
MV Lyr 3 northern NL(VY) extremely bright 1 (6)
QPOs present
VY Scl 3 southern, NL(VY) rare fading? 1 (7)
morning
======================================================================
* Class: 1 = primary target, 2 = secondary target, 3 = optional target
* Data: data request, 1 = VSNET core team, data will be received by
campaign report list. 2 = as above, in collaboration with
Hachisu-san.
(1) GO Com: rare superoutburst of the large-amplitude SU UMa-type.
(Following a precursor outburst). Magnitude about 13.5-14.0
Complex period behavior, likely from the "beat phenomenon".
Top-priority object, observe as long as you can!!
[VSNET web page]
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/gocom0306.html
(2) V803 Cen: definite superoutburst! Very clear superhumps recorded by
Butterworth and Greg Bolt. The object entered the very rapid decline
phase on June 8. Now apparently entered its oscillating state
(probably equivalent to "plateau" phase of a superoutburst).
See Kato et al. 2000 IBVS 4915 for overall picture of
V803 Cen supercycle; additional reading for CR Boo/V803 Cen:
Kato et al. 2001 IBVS 5091, Kato et al, 2000 MNRAS 315, 140,
all showing supercycle or standstill behavior of these helium dwarf
novae.
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/v803cen0306.html
(3) IM Nor: probably eclipsing recurrent nova. Cover a few orbital cycles
(once or twice in a week, during these dark runs). Orbital coverage
at different outburst states is important, and we encourage further
(occasional) orbital coverage as long as the object is reachable.
Berto's image (helpful for identification) is posted at:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/imnor.html
(4) V504 Cen: bright overlooked VY Scl star, now at maximum (mag about 13).
Position: 14:12:49.11, -40:21:37.1 (J2000.0). Suitably placed after
PU CMa runs.
(5) PU CMa: data from Peter Nelson. Superhumps have almost disappeared.
Lowered priority. Snapshot observation to watch for a rebrightening
will be sufficient. V803 Cen/V504 Cen/(IM Nor, faint) are better-suited
targets now.
(6) MV Lyr: short-term variations with time scales of 10-30 min are
dominant. QPOs with P about 10-11 min sometimes become prominent
Excellent coverage from different observers. No clear superhump
signal is recorded up to now. We may also receive V449 Lyr observations
in the same field (19 07 35.68 +43 59 53.0, J2000.0; the GCVS position
is incorrect). Although V449 Lyr is not particularly a campaign target,
the reported data will be forwarded to vsnet-ecl members for further
analysis.
(7) VY Scl: rare faint state. Visible in the morning only.
Objects recently dropped from the list: OU Vir (faded), CR Boo (now
treated as a continous target)
Please closely watch vsnet-alert and vsnet-outburst for other new
outbursts.
Web resource:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/gocom0306.html
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/gocom.html [background info]
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/v803cen0306.html
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/pucma.html
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/ouvir.html
*** Notice ***
This list is "read-only", i.e. it is used only for announcement of
the target lists. Other information, as well as reports and discussions
on particular targets, should be directed to the appropriate VSNET campaign
sub-lists (e.g. vsnet-campaign-dn for dwarf novae).
Nightly time-series observations should be now directed to (rather than
private e-mails):
---------------------------------------------------
vsnet-campaign-report@ooruri.kusastro.kyoto-u.ac.jp
---------------------------------------------------
Reports sent to this address will be delivered to the VSNET campaign
local staffs, including Ishioka-san, Uemura-san and me, and are expected
to be more convenient than personal e-mails to separate addresses.
Regards,
Taichi Kato
VSNET admin
Return to the Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
