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*** News from VSNET ***
A new variable, which was discovered by V. Tabur, was first suspected
to be a nova, but may be a peculiar variable.
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 25, 2003, as VSNET campaign
circulation 1409
[Note a large part of detailed information is posted to vsnet-campaign
sub-lists].
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
Peculiar Variable in Crux (RA = 12h23m16s.2, Dec = -60d22'34")
According to IAUC 8184, V. Tabur discovered a possible nova of
mag 10.2 (CCD) on Aug. 20. On Aug. 21, Tabor reported that it had
brightened about 1 mag. B. Monard had confirmed the brightening,
9.2C on Aug. 21 (vsnet-campaign-nova 1358). The Cerro Tololo
spectrum showed weak H_beta emission with P-Cyg profile, from which
the reporter H. E. Bond suggested that it would be a classical nova
before the maximum. The other reporter M. Della Valle et al.,
however, commented a lack of the typical signatures of classical
novae. They suggested that it would be a flare up of post-AGB star,
like V4332 Sgr, or V838 Mon (vsnet-campaign-nova 1360). W. Liller
reported that the color of the object supports the post-AGB star
scenario (vsnet-campaign-nova 1363). The object is now about 10mag
(vsnet-campaign-nova 1361, 1362).
SN 2003hg (RA = 23h51m24s.13, Dec = +20d06'38".3)
SN 2003hg is hosted by NGC 7771, a barred-spiral galaxy
interacting with a lenticular galaxy NGC 7770. The expected maximum
for typical SN Ia is mag about 14.7, and the object was discovered
with 16.9:C mag, so this SN seems a core-collapse event
(vsnet-campaign-sn 673).
SN 2003hh (RA = 00h00m07s.08, Dec = +08d16'42".3)
SN 2003hh is hosted by UGC 12890, an elliptical galaxy within a
compact cluster. This SN seems to be of type Ia soon after
explosion, which is consistent with the discovery magnitudes
(18.7-18.1 mag) (vsnet-campaign-sn 673).
SN 2003hi (RA = 15h56m33s.80, Dec = +41d53'47".5)
SN 2003hi is hosted by MCG +07-33-16, a spiral galaxy. The
expected maximum for typical SN Ia is mag about 17.5
(vsnet-campaign-sn 674).
SN 2003hj (RA = 15h24m20s.51, Dec = +29d57'11".9)
SN 2003hj is hosted by MCG +05-36-28, a dim galaxy. The expected
maximum for typical SN Ia is mag about 19, but the object was
discovered with 17.5-17.9C mag, so further photometry and spectral
type determination (or the redshift of the host galaxy) is urged
(vsnet-campaign-sn 674).
SN 2003hk (RA = 02h46m25s.69, Dec = +03d36'32".3)
SN 2003hk is hosted by NGC 1085, a spiral galaxy. The expected
maximum for typical SN Ia is mag about 16.6 (vsnet-campaign-sn 674).
SN 2003hl (RA = 01h59m21s.28, Dec = +19d00'14".5)
SN 2003hl is hosted by NGC 772, a nearby spiral galaxy. The
expected maximum for typical SN Ia is mag about 14.7
(vsnet-campaign-sn 675).
SN 2003hm (RA = 02h48m58s.39, Dec = +03d10'07".6)
SN 2003hm is hosted by UGC 2295, a spiral galaxy. The expected
maximum for typical SN Ia is mag about 15.6 (vsnet-campaign-sn 676).
(continuous targets)
V4641 Sgr (RA = 18h19m21s.6, Dec = -25d24'25")
T. Scarmato reported a possible flare to 10.8mag on August 21
(vsnet-campaign-v4641sgr 218, 219).
AM Her (RA = 18h16m13s.4, Dec = +49d52'03".1)
According to the data from D. Starkey and L. Cook, this object
seems to be largely varied superimposed on a fading trend
(vsnet-campaign-polar 27).
*** Future schedule ***
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]
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]
IM Nor Campaign
by I. Hachisu (University of Tokyo) and the VSNET team
For more information, see [vsnet-campaign-nova 1241]
GRB Mini-Symposium in JENAM2003
For more information, http://vsnet.konkoly.hu/jenam03/
[vsnet-campaign-grb 31]
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]
The 2003 Gamma Ray Burst conference
Hosted by Los Alamos,
in Santa Fe, New Mexico (USA), between September 8 and 12, 2003
http://grb2003.lanl.gov/
[vsnet-campaign-grb 13]
*** General information ***
Peculiar Variable in Crux
Chart presented by S. Otero:
http://ar.geocities.com/varsao/Carta_DZ_Cru.htm
[vsnet-campaign-nova 1359]
(This summary can be cited.)
Regards,
Makoto Uemura
Return to the Powerful Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
