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[vsnet-campaign-news 167] News from VSNET
*** News from VSNET ***
The eclipsing dwarf nova, IP Peg is now in outburst.
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 August 12, 2002, as VSNET campaign circulation 1331
[Note a large part of detailed information is posted to vsnet-campaign
sub-lists].
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
HadV106 (RA = 20h26m25s.9, Dec = +24d30'38")
K. Haseda reported the discovery of a new variable star.
The object is reported to be fading to <13p mag on 2002 July.
The similar fading trend is also detected by A. Takao.
Although the amplitude and the IRAS flux may suggest a Mira-type
variable, the object may have been systematically bright before
2001. The current fading therefore may be a temporary one
rather than a result of pulsation (vsnet-campaign-unknown 90,
93, 94).
V1089 Sgr (RA = 19h08m46s.38, Dec = -17d21'46".7)
As detected by R. Stubbings on August 6, V1089 Sgr is in
outburst (14.0mag). This is the first outburst detected in
this season. Since the nature of this object is not well
known, further detailed observations are encouraged
(vsnet-campaign-dn 2705).
PQ Aql (RA = 19h53m05s.18, Dec = +12d59'02".1)
T. Kinnunen reported an outburst (15.3mag) of this suspected
SU UMa-type dwarf nova on August 6 (vsnet-campaign-dn 2707).
T. Kato performed time-series observation on August 9 and
reported that no apparent superhumps have been detected. PQ Aql
is more likely an SS Cyg-type dwarf nova (vsnet-campaign-dn 2718,
2720). The outburst still continues (vsnet-campaign-dn 2714, 2723).
V485 Cen (RA = 12h57m23s.30, Dec = -33d12'06".8)
On August 6, R. Stubbings detected a bright outburst (13.9mag)
of this ultra-short period SU UMa-type dwarf nova. The outburst
is possibly a superoutburst (vsnet-campaign-dn 2703).
The outburst continues (vsnet-campaign-dn 2715).
Z UMi (RA = 15h02m01s.35, Dec = +83d03'48".7)
The object is now fading. The current magnitude is about
11.7mag (vsnet-campaign-rcb 58, 59).
SN 2002ei (RA = 03h16m00s.33, Dec = -05d30'07".4)
SN 2002ei was discovered by the KAIT team on images taken
on Aug. 8.5 (mag about 16.5) and 9.4 UT (mag about 16.6).
MCG -01-09-024, the host galaxy of SN 2002ei, is a nearby spiral
galaxy. The UCB team revealed that it is of type II in its
plateau phase on Aug. 9 UT (vsnet-campaign-sn 460).
SN 2002ej (RA = 17h05m22s.62, Dec = +75d24'24".2)
SN 2002ej was discovered by T. Puckett and B. Kerns on images
taken August 9 at 17.5mag. NGC 6324, the host galaxy of SN 2002ej,
is a spiral galaxy. The expected maximum for typical SN Ia is
mag about 15.8 (vsnet-campaign-sn 460).
(continuous targets)
V2276 Sgr (RA = 20h26m22s.16, Dec = -43d40'31".9)
H. Yamaoka performed astrometry using images taken by D. Nogami
at Hida observatory: The object was about 16.0CR on Aug 5.5.
V2276 Sgr is identified with a GSC star (r=15.64 b=19.40) and
a USNO star (r=18.2 b=19.0) (vsnet-campaign-dn 2702).
V1039 Cen (RA = 13h55m41s.27, De = -64d15'57".9)
The object experienced a rebrightening to 12.6mag, as
reported by B. Monard on August 5 (vsnet-campaign-nova 963).
V344 Lyr (RA = 18h44m31s.80, Dec = +43d22'10".2)
The object now experiences an outburst at 14.9-15.2mag.
It may be an anomalously outbursting state (vsnet-campaign-dn 2724).
V1504 Cyg (RA = 19h28m55.87s, Dec = +43d05'39".9)
As reported by M. Simonsen on August 6, the object is now
in a bright outburst (14.2mag), which is probably a superoutburst
(vsnet-campaign-dn 2701). The superoutburst continues
(vsnet-campaign-dn 2704, 2708, 2717, 2722).
ES Aql (RA = 19h32m21s.58, Dec = -00d11'31".2)
The fading still continues (vsnet-campaign-rcb 56, 60).
DH Aql (RA = 19h26m12s.05, Dec = -10d15'21".4)
M. Uemura reported a detection of superhumps and substructures
on August 5 and 6 (vsnet-campaign-dn 2710). The superoutburst
entered a rapid fading phase on August 7 (vsnet-campaign-dn 2709,
2712, 2716). T. Kato reported the object was still significantly
above quiescence (15.5-16 mag) on August 9 (vsnet-campaign-dn 2719).
SN 2002eg (RA = 19h49m47s.25, Dec = +50d41'53".6)
According to IAUC 7952, the UCB team has revealed that SN 2002eg
is of type IIb, shortly before maximum brightness on Aug. 9 UT
(vsnet-campaign-sn 461).
IP Peg (RA = 23h23m08s.7, Dec = +18d24'59".1)
As detected by J. Gunther, IP Peg experienced an outburst
(12.6mag on August 6) (vsnet-campaign-dn 2706). The outburst
continues (vsnet-campaign-dn 2713, 2721).
V4641 Sgr (RA = 18h19m21s.6, Dec = -25d24'25")
The object remains at the quiescent level (vsnet-campaign-v4641sgr
163). M. Uemura reported a minor outburst occurred on August 5.
During the outburst, the object reached 13.1mag with rapid
brightening and fading. The light curve shows some hints of
short-term (a few minutes) modulations with amplitudes of 0.1-0.2 mag
(vsnet-campaign-v4641sgr 164).
DY Per (RA = 02h35m17s.12, Dec = +56d08'44".7)
The brightening continues (vsnet-campaign-rcb 57).
V893 Sco (RA = 16h14m45s.26, Dec = -28d39'30".3)
An outburst to 12.9mag was reported by R. Stubbings on
August 9 (vsnet-campaign-dn 2725).
MisV1147 (RA = 22h54m03s.78, Dec = +58d54'02".1)
M. Simonsen reported that the object has been active
between 12.9-14.2 mag during 2002 June-August. The object is
now brightening (vsnet-campaign-unknown 91, 92).
V2051 Oph (RA = 17h08m19.1s, Dec = -25d48m31.1s)
An outburst to 14.2mag was reported by R. Stubbings on
August 6 (vsnet-campaign-v2051oph 25).
*** Future schedule ***
International Workshop
HIGH RESOLUTION X-RAY SPECTROSCOPY with XMM-NEWTON and CHANDRA
24th and 25th October 2002
For more details, visit the workshop website:
http://vsnet.mssl.ucl.ac.uk/~gbr/rgs_workshop/
[vsnet-campaign-xray 152]
===== International Symposium ======
"The Universe Viewed in Gamma-rays
--- Univ. Tokyo Workshop 2002 ---"
September 25-28, 2002, Kashiwa, Chiba, Japan
http://icrhp9.icrr.u-tokyo.ac.jp/Symp2002.html
[vsnet-campaign-blazar 265]
International Symposium: The Universe viewed in gamma-rays
--- Univ. Tokyo Workshop 2002 ---
September 25-28, 2002, Kashiwa, Chiba, Japan
http://icrhp9.icrr.u-tokyo.ac.jp/Symp2002.html
[vsnet-campaign-blazar 264]
Texas in Tuscany
XXI Symposium on Relativistic Astrophysics
Florence, Italy, December 9-13, 2002
For more information:
http://vsnet.arcetri.astro.it/~texaflor/
[vsnet-campaign-xray 142]
NEW X-RAY RESULTS FROM CLUSTERS OF GALAXIES AND BLACK HOLES
34th COSPAR Scientific Assembly
10th to 12th October 2002 - Houston, Texas
For more information, visit the session website:
www.mssl.ucl.ac.uk/www_astro/cospar
[vsnet-campaign-xray 124]
[vsnet-campaign-agn 2]
[vsnet-campaign-xray 133]
SUPERNOVAE (10 YEARS OF SN1993J)
22-26 April 2003, Valencia, Spain
Web site: http://vsnet.uv.es/2003supernovae/
[vsnet-campaign-sn 342]
[vsnet-campaign-sn 452]
34TH COSPAR - GRB AFTERGLOW PHYSICS
HOUSTON, TX, USA, 10-19 OCTOBER 2002
Main Scientific Organizer (MSO):
Elena Pian - INAF, Astronomical Observatory of Trieste, Italy -
pian@ts.astro.it
http://vsnet.ts.astro.it/topics/topix.html
[vsnet-campaign-grb 1]
*** General information ***
V503 Cyg
CCD image by T. Hynek:
http://thynek.wz.cz/var/V503_Cyg_020803.jpg
[vsnet-campaign-dn 2700]
IP Peg
eclipse ephemeris, see [vsnet-campaign-dn 2706]
(This summary can be cited.)
Regards,
Makoto Uemura
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page