Return to Home Page
*** News from VSNET ***
The SU UMa star, V585 Lyr entered a rapid fading stage, and
a rebrightening was detected.
For more detail information about these objects,
see below, "VSNET Weekly Campaign Summary" of the last week.
---------------------------------------------------------------------------
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
----------------------------------------------------------------------------
The following was issued on October 6, 2003, as VSNET campaign
circulation 1414
[Note a large part of detailed information is posted to vsnet-campaign
sub-lists].
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
SN 2003ik (RA = 08h04m06s.52, Dec = +62d59'19".8)
SN 2003ik is hosted by MCG +11-10-56, an edge-on spiral galaxy
which is a northwestern component of a galaxy triplet CGCG 310-032.
The discovery magnitude (16.6C mag) is consistent with the expected
maximum of typical SN Ia (vsnet-campaign-sn 702). The UCB team
revealed that it was a type Ia SN near maximum on Oct. 2
(vsnet-campaign-sn 704).
AG Dra (RA = 16h01m40s.98, Dec = +66d48'10".3)
An outburst of 9.2mag was reported on September 29 by
E. Muyllaert. The last outburst occurred exactly one year ago
(vsnet-campaign-symbio 82). The outburst continues
(vsnet-campaign-symbio 84).
SV Sge (RA = 19h08m11s.75, Dec = +17d37'41".3)
The object may have started fading in late September
(vsnet-campaign-rcb 164).
V630 Cyg (RA = 21h34m59s.21, Dec = +40d40'18".5)
An outburst was detected on September 24 (vsnet-campaign-dn
3992). A long duration indicates a superoutburst, which is still
ongoing (vsnet-campaign-dn 3999).
Possible Nova in M31 (RA = 00h42m46s.72, Dec = +41d19'46".7)
K. Hornoch reported a discovery of a possible nova in M31 on images
taken on 2003 Sep. 30.835 UT. It was fainter than 18.6mag on
Sep. 26.812 and recorded with 17.0 mag on Sep. 30.835 UT
(vsnet-campaign-nova 1500). K. Hornoch confirmed the object at
17.2mag on October 1/2 (vsnet-campaign-nova 1501). G. Sostero also
reported a confirmation of the object at 16.7mag on Sep. 29.83
(vsnet-campaign-nova 1502).
SN 2003im (RA = 00h44m59s.28, Dec = -08d53'11".5)
SN 2003im is hosted by 2MASX J00445922-0853228 = NPM1G -09.0031, a
small galaxy superimposed on the Abell 85 cluster. The recession
velocity of this galaxy suggests that it would be a foreground
one, and the expected maximum for typical SN Ia is mag about 16.2
(vsnet-campaign-sn 703). The UCB team revealed that it was type Ia
SN about 1 months after maximum (Oct. 2 UT spectrum)
(vsnet-campaign-sn 704).
SN 2003in (RA = 03h35m33s.31, Dec = +05d03'52".7)
SN 2003in is hosted by IC 1956, a barred-spiral galaxy. The
expected maximum for typical SN Ia is mag about 17.0
(vsnet-campaign-sn 703). The UCB team revealed that it was type Ia
SN about 2-3 weeks after maximum (Oct. 2 UT spectrum)
(vsnet-campaign-sn 704).
CH Cyg (RA = 19h24m33s.07, Dec = +50d14'29".5)
The object is now gradually brightening (vsnet-campaign-symbio 83).
V834 Cen (RA = 14h09m07s.4, Dec = -45d17'16")
The object is returning to a bright state (vsnet-campaign-polar 37).
SN 2003io (RA = 02h17m26s.87, Dec = +14d34'36".3)
SN 2003io is hosted by UGC 1761, an irregular galaxy within a
small group of galaxies. The expected maximum for typical SN Ia is
mag about 15.5 (vsnet-campaign-sn 704).
SN 2003ip (RA = 00h33m16s.76, Dec = +07d54'19".5)
SN 2003ip is hosted by UGC 327, a spiral galaxy which makes a pair
with CGCG 409-034. The UCB team took a spectrum of SN 2003ip on
Oct. 2 UT and showed that it was type II SN within a few weeks after
the explosion (vsnet-campaign-sn 704).
(continuous targets)
RU Hor (RA = 02h46m05s.38, Dec = -63d35'04".0)
The best superhump period is reported to be 0.07090(1) d
(vsnet-campaign-dn 3988, 3994). The superoutburst is ongoing
(vsnet-campaign-dn 3990).
SN 2003hf (RA = 16h50m48s.38, Dec = +45d24'01".8)
The UCB team reports that it is indeed a type II SN. It is likely
a type II-L (linearly decliner) (vsnet-campaign-sn 701).
SN 2003hp (RA = 17h40m18s.69, Dec = +51d01'41".3)
The UCB team reports that it is a peculiar type Ic SN (SN
1998bw-like, say, hypernova) (vsnet-campaign-sn 701).
SN 2003ht (RA = 02h59m55s.17, Dec = +24d13'36".8)
It is a type II SN in the nebular (late) phase (vsnet-campaign-sn 701).
SN 2003hw (RA = 03h01m50s.02, Dec = +35d44'36".4)
The UCB team took a spectrum on Sep. 28 and showed that it was a
type Ia SN about 2 months after maximum (vsnet-campaign-sn 701).
SN 2003ig (RA = 04h09m43s.50, Dec = +37d00'45".8)
The UCB team took a spectrum on Sep. 28 and showed that it is a
type Ic SN, within a week after maximum (vsnet-campaign-sn 701).
SN 2003gq (RA = 22h53m20s.68, Dec = +32d07'57".6)
They reobserve it and confirmed the peculiarity. A spectrum
resembles to that of SN 2002cx, which has unusually narrow lines
(vsnet-campaign-sn 701).
SN 2003ij (RA = 05h55m41s.18, Dec = +85d54'21".7)
The UCB team revealed that it was a type Ia SN within a few days
of the maximum light on Oct. 2. It has possibly brightened from the
discovery magnitude (vsnet-campaign-sn 704).
V1294 Aql (RA = 19h33m36s.9, Dec = +03d45'41")
S. Otero reports that the object finally reached V=7.55 -according
to ASAS-3 data (by G. Pojmanski)- breaking its previous record of V=
7.51 (vsnet-campaign-be 272).
V551 Sgr (RA = 18h00m56s.46, Dec = -34d35'45".6)
T. Kato reports that timing analysis of the superhumps has yielded
a slightly positive period derivative. This Pdot is seemingly
unusual for this superhump period (vsnet-campaign-dn 3989). The
superoutburst is ongoing (vsnet-campaign-dn 3991).
V2573 Oph (RA = 17h19m14s.086, Dec = -27d22'35".21)
The object rapidly faded in September (vsnet-campaign-nova 1499, 1504).
V585 Lyr (RA = 19h13m58s.5, Dec = +40d44'09")
The object entered a rapid fading phase. The object remained
bright until Sep. 29 (vsnet-campaign-dn 3993). A rebrightening was
detected by E. Pavlenko at Oct. 3.8UT. It was R=16.4 on Oct. 3 and
fainter than 18.5mag on Oct. 2 (vsnet-campaign-dn 3996). The
rebrightening was also observed by the Kyoto team. The resultant
light curve did not show a rapid fading trend, indicating that the
rebrightening was caught during its premaximum stage. There were
also superimposed hump-like features (about 0.1 mag), which may be
persistent (late)superhumps (vsnet-campaign-dn 3998). D. Rodriguez
reported that it was fainter than 17.1mag on Oct. 4
(vsnet-campaign-dn 3997).
V475 Sct (RA = 18h49m37s.60, Dec = -09d33'50".85)
The object remained calm at ~10 mag (vsnet-campaign-nova 1503),
and then, started rebrightening in early October
(vsnet-campaign-nova 1506).
Z Cam (RA = 08h25m13s.2, Dec = +73d06'39")
The standstill has been confirmed. The last standstill was in
2001 April-July (vsnet-campaign-dn 3995).
*** Future schedule ***
Call for Proposals
for Cycle 1 of the Swift Guest Investigator Program
Notices of Intent due: October 6, 2003
Proposal due date: December 1, 2003
[vsnet-campaign-grb 39]
Stellar-Mass, Intermediate-Mass, and Supermassive Black Holes
Kyoto International Community House, Kyoto, Japan
October 28 - 31, 2003
http://vsnet.astro.isas.ac.jp/conference/bh2003/
[vsnet-campaign-agn 6]
[vsnet-campaign-xray 260]
ASTRONOMICAL POLARIMETRY
CURRENT STATUS AND FUTURE DIRECTIONS
15-19 March 2004, Waikoloa Beach Marriott, Waikoloa, Hawaii
http://vsnet.jach.hawaii.edu/JACpublic/JAC/pol2004
[vsnet-campaign-polar 35]
IAU Symposium No. 222 - BHSIGN Conference
The Interplay among Black Holes, Stars and ISM in Galactic Nuclei
March 1-5, 2004, Gramado, Brasil
http://bhsign.if.ufrgs.br/
[vsnet-campaign-agn 5]
WEBT campaign on AO 0235+16
Campaign with VLBA conducted by Claudia M. Raiteri
from September 2003
see [vsnet-campaign-blazar 305]
X-RAY AND RADIO CONNECTIONS
Santa Fe, New Mexico, USA
3 - 6 February 2004
http://vsnet.aoc.nrao.edu/events/xraydio/
[vsnet-campaign-xray 258]
X-Ray Timing 2003: Rossi and Beyond
November 3-5, 2003
Harvard-Smithsonian Center for Astrophysics
http://hea-www.harvard.edu/xrt2003/
[vsnet-campaign-xray 242]
AR UMa and AM Her campaign with the HST
TOO program conducted by S. Saar and F. Ringwald
see [vsnet-campaign-polar 24]
QS Tel: Call for observations
TOO program with the Chandra conducted by C. Mauche
until the end of 2004
see [vsnet-campaign-polar 28]
WEBT Campaign for AO 0235+16 with XMM-Newton
January-February 2004
please contact to Claudia M. Raiteri,
see [vsnet-campaign-blazar 301]
Multiwavelength AGN Surveys
a "Guillermo Haro" Astrophysics Conference
organized by INAOE
December 8-12, 2003
Cozumel, Mexico
http://vsnet.inaoep.mx/~agn2003/
[vsnet-campaign-agn 4]
Conference: THE INTERPLAY AMONG BLACK HOLES, STARS AND ISM IN
GALACTIC NUCLEI
in Gramado, south of Brasil, March 1-5, 2004
for more information, please contact to BHSIGN@if.ufrgs.br
[vsnet-campaign-agn 3]
eta Car: The next "shell event"/X-ray eclipse
M. Corcoran reported the event will occur this summer.
Coordinated ground-based observations of eta car along with the
X-ray observations would be really important.
For more information:
Latest X-ray light curve:
http://lheawww.gsfc.nasa.gov/users/corcoran/eta_car/etacar_rxte_lightcurve/
[vsnet-campaign-sdor 23, 24,
25, 26, 28, 29, 46]
[vsnet-campaign-xray 172]
Light curve provided by S. Otero:
http://ar.geocities.com/varsao/Curva_Eta_Carinae.htm
[vsnet-campaign-sdor 22, 32, 33]
*** General information ***
RU Hor
VSNET page:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/ruhor.html
[vsnet-campaign-dn 3988]
NMO digest, see [vsnet-campaign-mira 78]
(This summary can be cited.)
Regards,
Makoto Uemura
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
