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[vsnet-campaign-news 113] News from VSNET 83
*** News from VSNET ***
A supernova was discovered in very nearby galaxy.
For more detail information about these objects,
see below, "VSNET Weekly Campaign Summary" of the last week.
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VSNET (Variable Star Network) is an international variable star observing
network, covering various areas of novae, supernovae, cataclysmic variables
(CVs), X-ray transients, and other classical eruptive, pulsating, and
eclipsing variables. VSNET is one of invited contributing organizations
to the SkyPub AstroAlert system.
The "News from VSNET", mainly focusing on recent remarkable activities of
CVs and related systems, is issued on a weekly basis, except on occasions
of extremely urgent or transient events.
Please refer to the VSNET Home Page for more details of events and
objects listed.
VSNET Home Page: http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/
VSNET provides a number of mailing lists, on which various news and topics
are discussed. Subscriptions to the VSNET mailing lists are free of charge;
please refer to the instruction on the above page if a reader needs more
information of the list structure.
CCD observations of such targets are a relatively easy task for a 20-40cm
telescope; simply take as many CCD frames (with exposure times 10-30 sec)
as possible, spanning several hours per night. The only requirements are
the weather and your patience! If you need more help on the observing
technique, please feel free to ask on the vsnet-campaign list.
We would sincerely appreciate volunteers who would join the VSNET
Collaboration team to study the wonders of these exotic variable stars.
To join the VSNET campaign collaborative list, send an e-mail to
vsnet-adm@kusastro.kyoto-u.ac.jp (VSNET administrator)
with a line "SUBSCRIBE vsnet-campaign."
(VSNET campaign members are strongly recommended to subscribe to vsnet-alert
at the same time).
Regards,
Taichi Kato
On behalf of the VSNET administrator team
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The following was issued on December 3, 2001, as VSNET campaign circulation 1234
[Note a large part of detailed information is posted to vsnet-campaign
sub-lists].
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
SN 2001gd (RA = 13h13m23s.89, Dec = +36d38'17".7)
Mr. Itagaki discovered SN 2001gd on Nov. 24.820. He reported
that it was mag 16.5. The existence of the new object was confirmed
immediately by Ms. R. Kushida on Nov. 24.851 (bright twilight),
and she reported it was mag 17.5. The next day, she also observed
it and reported that it was mag 16.2 on Nov. 25.8. A. Dimai
independently discovered it on Nov. 25.21 (mag 16.4). The object is
about 52" west and 161" north (about 2'50" NNW) of the nucleus of the
large spiral (SA(s)c) galaxy NGC 5033. This galaxy has produced
SN 1985L, which was of type II-L and was mag 13.0 at maximum.
If SN 2001gd is of unreddened type Ia, its expected maximum is around
mag 12 (vsnet-campaign-sn 284). Reported magnitude estimates of
this object shows no significant brightening betweeen November 24 - 28.
It seems not to be in a rapid-rising phase of SN Ia
(vsnet-campaign-sn 286).
(continuous targets)
GY Cnc (RA = 09h09m50s.5, Dec = +18d49'47")
The significant fading was reported on November 27. The outburst
has already finished (vsnet-campaign-dn 1955).
SN 2001gb (RA = 09h59m00s.96, Dec = +17d49'12".4)
This SN was revealed to be of type Ia near maximum light by
the CfA group (IAUC 7761; vsnet-campaign-sn 285).
SN 2001gc (RA = 05h55m26s.14, Dec = +51d54'34".2 )
The CfA team revealed that this SN is of type Ia having larger
expansion velocity than usual. They commented that the expansion
velocity (16600 km/s) suggests this SN to be well (~2 weeks) before
maximum, but the inspection of their spectrum shows that it is
probably near maximum but has the larger expansion velocity.
Such a large expansion velocity is typical for the intrinsically
bright SN Ia (vsnet-campaign-sn 285).
WZ Sge (RA = 20h07m36s.53, Dec = +17d42'15".3)
The slow fading is still ongoing (vsnet-campaign-dn 1954).
V1504 Cyg (RA = 19h28m55.87s, Dec = +43d05'39".9)
As reported by G. Poyner, a new outburst of this SU UMa-type
dwarf nova was detected on November 26 at 14.8mag. It may be
a superoutburst (vsnet-campaign-dn 1953).
*** Future schedule ***
International Conference on Classical Nova Explosions
Sitges (Barcelona), Spain: 20-24 May 2002
For more detailed information, see http://vsnet.ieec.fcr.es/novaconf
[vsnet-campaign-nova 643]
Blazar meeting at Tuorla: June 17-21, 2002
for more information, see http://vsnet.astro.utu.fi/blazar02
[vsnet-campaign-blazar 232]
International workshop
"XEUS - studying the evolution of the hot universe"
March 11-13, 2002 ; MPE Garching, Germany
for more informatiom, see
http://wave.xray.mpe.mpg.de/conferences/xeus-workshop
[vsnet-campaign-xray 98]
*** General information ***
(This summary can be cited.)
Regards,
Makoto Uemura
vsnet-adm@kusastro.kyoto-u.ac.jp
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page