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*** News from VSNET ***
A sudden period change of superhumps was reported in V699 Oph.
eta Car started rapid fading.
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 July 14, 2003, as VSNET campaign
circulation 1404
[Note a large part of detailed information is posted to vsnet-campaign
sub-lists].
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
SN 2003gl (RA = 23h53m53s.99, Dec = +07d57'23".7)
SN 2003gl is hosted by NGC 7782, a spiral galaxy within a small
group including NGC 7779, NGC 7780 and NGC 7781. The expected
maximum for typical SN Ia is mag about 16.1 (vsnet-campaign-sn 655).
The NOT summer school team took a spectrum of SN 2003gl on July 7.2,
which revealed that it was type Ia SN a few weeks after maximum
(vsnet-campaign-sn 656).
V893 Sco (RA = 16h14m45s.26, Dec = -28d39'30".3)
As reported by R. Stubbings on July 6, the eclipsing dwarf nova
(below the period gap) V893 Sco experienced a relatively bright
outburst. No definite superoutbursts of this star have been
recorded yet (vsnet-campaign-dn 3852).
V337 Cyg (RA = 19h59m53s.0, Dec = +39d14'00")
P. Schmeer reported an outburst (17.0mag) of V337 Cyg on July 7
(vsnet-campaign-dn 3857).
RZ Vul (RA = 19h47m14s.7, Dec = +19d29'16")
The unusual pulsating variable(?), RZ Vul is now fading. The
previous deep fading occurred in 2000, reaching mag 14
(vsnet-campaign-unknown 208).
SN 2003gm (RA = 13h52m51s.72, Dec = -01d06'39".2)
SN 2003gm is hosted by NGC 5334, a nearly face-on barred-spiral
galaxy. It is a nearby galaxy, and the expected maximum for
typical SN Ia is mag about 13.1. The reported magnitude (17.0:
mag) suggests, however, that it seems to be dim and not to be in the
fast rising phase. It can be heavily obscured by dust, or a less
luminous event such as SN 1987A (vsnet-campaign-sn 656).
RZ Sge (RA = 20h03m18s.49, Dec = +17d02'52".6)
P. Schmeer reported an outburst (12.7mag) on July 13. It may be a
rebrightening to a supermaximum (vsnet-campaign-dn 3866).
(continuous targets)
V1141 Aql (RA = 19h37m10s.01, Dec = +02d35'59".2)
D. Nogami reported that a preliminary period analysis of the data
in July 4-6 indicates 0.06308(8) d (= 90.8 min). The superhump
period seems to be getting a little longer (vsnet-campaign-dn 3856).
delta Sco (RA = 16h00m19s.9, Dec = -22d37'17")
D. West reported that there hasn't been any significant change in
the FWHM of the H Alpha line in the last year (vsnet-campaign-be
244, ans see also following articles on his method,
vsnet-campaign-be 245, 251, 252, 246, 247, 248, 249, 250).
SN 2003gj (RA = 21h07m19s.18, Dec = -25d29'23".6)
The UCB team took a spectrum of this object on July 7 UT, which
reveals that it was probably a type Ia SN about 1 week after maximum.
It shows some peculiarity (vsnet-campaign-sn 657).
SN 2003gk (RA = 23h01m42s.99, Dec = +02d16'08".7)
The CfA team and the NOT summer school team reported that it was a
type-Ib SN a few weeks after maximum (the spectra were taken on
July 3.39 and 7.2 UT, respectively) (vsnet-campaign-sn 656).
NSV 09923 (RA = 17h59m17s.1, Dec = -42d35'04")
T. Kato reported on July 7 that the mean superhump period was
0.08231 d. There is a general tendency of a systematic period
decrease at a rate of dot(P)/P = -1.5x10^(-5). The behavior of the
superhump period change looks normal for an SU UMa star at this
period (vsnet-campaign-dn 3855). The object is fading
(vsnet-campaign-dn 3862).
V Sge (RA = 20h20m14s.75, Dec = +21d06'09".0)
V Sge started brightening (vsnet-campaign-nl 132).
V589 Her (RA = 16h22m07s.19, Dec = +19d22'36".3)
The outburst rapidly faded. Y. Sano's observations showed that
the object was observed to fade by 1.1 mag between July 6 and 7. It
seems to be a normal outburst (vsnet-campaign-dn 3851, 3853, 3864).
AH Her (RA = 16h44m09s.99, Dec = +25d15'02".1)
The object faded from the standstill (vsnet-campaign-dn 3865).
V699 Oph (RA = 16h25m14s.8, Dec = -04d40'25")
The amplitudes of the superhumps became slightly smaller on July 6
(0.10-0.15 mag)(vsnet-campaign-dn 3850). T. Kato revised the
superhump period to be 0.07027(4) d on July 7. The superhump period
change was almost, which is rather unusual for this period
(vsnet-campaign-dn 3854, 3858). T. Kato reported a sudden period
decrease in the light curves on July 7-8 (vsnet-campaign-dn 3861).
V4745 Sgr (RA = 18h40m02s.54, Dec = -33d26'55".1)
This nova is now rapidly fading from the fourth maximum
(vsnet-campaign-nova 1322).
eta Car (RA = 10h45m03s.65, Dec = -59d41'03".7)
S. Otero reported that eta Car started rapid fading, as predicted
by him (vsnet-campaign-sdor 48, 49).
R CrB (RA = 15h48m34s.40, Dec = +28d09'23".7)
Based on recent observations, R CrB may be fainter
(vsnet-campaign-rcb 145).
SY Cir (RA = 14h03m33.83s, Dec = -69d37'53".7)
T. Kato reported a corrected identification above. This star
shows alternating minima, which seems to confirm the original RV Tau
classification (vsnet-campaign-dn 3863).
*** Future schedule ***
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]
IAU JD17 "ATOMIC DATA FOR X-RAY ASTRONOMY"
ON JULY 22-23, 2003 at the XXVth IAU GENERAL ASSEMBLY
SYDNEY, AUSTRALIA, JULY 13-26, 2003
for more information:
http://vsnet.astronomy.ohio-state.edu/~pradhan/Iau/iau.html
[vsnet-campaign-xray 227]
"X-ray and Radio Emission of Young Stars"
July 28 - 29, 2003, Rikkyo University, Tokyo, Japan
for more information , please contact to kitamoto@rikkyo.ne.jp
[vsnet-campaign-xray 218]
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 ***
V337 Cyg
Correct identification by J. Manek:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/v337cyg.html
[vsnet-campaign-dn 3859]
Nova in LMC 2003
New image taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/nlmc2003.html
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/Novae/lmc_2003/mon2.gif
[vsnet-campaign-nova 1323]
delta Sco
New spectrum taken by D. West:
http://members.aol.com/dwest61506/page78.html
[vsnet-campaign-be 244]
YSOs
See, [vsnet-campaign-orion 49, 50, 51, 52, 53, 54, 55, 56]
Software problem (AIP4win)
See, [vsnet-campaign-ccd-discussion 55, 56, 57, 58, 59, 60, 61,
62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77,
78, 79, 80, 81, 82, 83, 84, 85]
(This summary can be cited.)
Regards,
Makoto Uemura
Return to the Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
