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[vsnet-campaign 1361] VSNET Weekly Campaign Summary
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
NSV 10934 (RA = 18h40m52s.26, Dec = -83d43'10".24)
On January 2, R. Stubbings detected an outburst to 15.0mag of
NSV 10934. The object further brightened to 12.0-11.9mag on January
2 and 11.4mag on January 3. This is the brightest outburst ever
observed by the VSNET members; the outburst was suspected to be a
superoutburst (vsnet-campaign-dn 3219, 3222, 3228,
vsnet-campaign-news 190). The light curve obtained by C. Stockdale
on January 3 was rather flat (vsnet-campaign-dn 3236). The
following time-series observation by B. Monard on January 3 showed
modulations up to 0.1mag with no clear periodicity
(vsnet-campaign-dn 3233). On January 4, clear superhumps were
detected by C. Stockdale. The amplitude of superhumps was ~0.15mag
and its period was estimated to be 0.0743(8) d. The object is now
firmly established to be an SU UMa-type dwarf nova
(vsnet-campaign-dn 3228). The light curve also showed a possible
QPOs (vsnet-campaign-dn 3239). On January 5, the superhumps further
grown to a full amplitude of 0.3mag or even greater. The best mean
superhump period was 0.07615(6) d. There seems to have been a rapid
period change during this evolution period (vsnet-campaign-dn
3253). The superoutburst is now ongoing (vsnet-campaign-dn 3242,
3243, 3257).
VW Tuc (RA = 00h20m19s.08, Dec = -73d52'07".9)
As reported by R. Stubbings, a possibly rare outburst (15.1mag) of
the dwarf nova VW Tuc started on January 2. Although there have
been substantial gaps between observations, the last reported
outburst occurred in 1997 November. The object is in the SMC field,
and is also known as SMC V0012 = HV 6327 (vsnet-campaign-dn 3220).
B. Monard reported it was 15.6CR mag on January 3 (vsnet-campaign-dn
3232), and the fading trend was confirmed on January 4
(vsnet-campaign-dn 3245). In light curves on January 3 and 4
observed by P. Nelson and B. Heathcote, no apparent superhumps were
observed, suggesting that the object is an SS Cyg-type (UGSS) dwarf
nova. The mean decline rate was 0.4 mag/d, which implies a moderate
orbital period (vsnet-campaign-dn 3254).
TU Tri (RA = 01h39m15s.41, Dec = +31d24'19".3)
An outburst (14.6mag) was reported by M. Simonsen on January 1.
The last reported possible outburst was in 1998, by T. Kinnunen.
Further two outbursts were recorded in 1995 by M. Iida's CCD
monitoring. It may be possible that many outbursts have escaped
visual detection because of the faintness (vsnet-campaign-dn 3216).
K. Torii confirmed that it was still in outburst on January 4, and
the resultant light curve showed no superhumps, likely indicating
that this object is an SS Cyg-type dwarf nova (vsnet-campaign-dn
3237, 3262). The object has faded (vsnet-campaign-dn 3247).
SN 2002kf (RA = 06h37m15s.31, Dec = +49d51'10".2)
SN 2002kf was discovered by S. Brady on an image taken on December
27 when it was about 15.9mag. CGCG 233-023, a host galaxy of SN
2002kf is a small galaxy near the Galactic plain (vsnet-campaign-sn
524). The CfA team revealed that it was type Ia SN near the maximum
at Dec. 31.34 UT. The expected maximum is consistent with the
discovery magnitude (vsnet-campaign-sn 525).
L414, L940, L96
M. Regalado reported three new red variables, L414, L940, L96.
With more than 320 observations by A. Violat and T. Benasar, they
estimated periods of 107.35 d for L414 and 143.68 d for L940
(vsnet-campaign-unknown 170).
V485 Cen (RA = 12h57m23s.30, Dec = -33d12'06".8)
An outburst (14.0mag) of an ultrashort-period (Porb = 59 min)
system was reported on January 3 by R. Stubbings. The last outburst
(superoutburst?) was reported in 2002 August (vsnet-campaign-dn
3230). It was still in outburst on January 4 and 5 without rapid
fading, which indicate that it is a superoutburst. The supercycle
of 160 d seems to be now established (vsnet-campaign-dn 3244, 3260).
MKN 421 (RA = 11h04m27s, Dec = +38d12'32")
The object was reported brighter by G. Poyner on January 4
(vsnet-campaign-blazar 293).
FI Cas (RA = 00h06m10s.07, Dec = +55d58'51".1)
M. Linnolt reported that FI Cas was bright at 15.0mag on January
4 (vsnet-campaign-dn 3250). K. Torii confirmed the outburst on
January 5 at about 15.5mag (vsnet-campaign-dn 3252).
UV Gem (RA = 06h38m44s.16, Dec = +18d16'11".5)
As reported by R. Stubbings on January 5, UV Gem is undergoing a
possible superoutburst (14.4mag). Although the SU UMa-type nature
of UV Gem has been established, there has been a report that at
least one of long outburst did not show clear superhumps. Further
observations are clearly needed (vsnet-campaign-dn 3255, 3258).
(continuous targets)
V1208 Tau (RA = 04h59m44s.00, Dec = +19d26'23".7)
A clear growth of secondary superhumps were observed in the end of
December (vsnet-campaign-dn 3215). On January 3, T. Kato reported
that there may be some hint of beat-like modulation of the mean
brightness (vsnet-campaign-dn 3224). The superoutburst continues
(vsnet-campaign-dn 3231, 3263).
GZ Cnc (RA = 09h15m51s.70, Dec = +09d00'50".2)
On January 4, a new outburst (13.3-13.4mag) was reported by
R. Stubbings (vsnet-outburst 5015). The observations by the VSNET
collaboration team since the last outburst showed that there have
always been quasi-periodic variations with periods 1 hr or slightly
shorter (vsnet-campaign-dn 3240, 3246). In a new light curve by
K. Torii on January 4, there seemed to exist persistent short-period
(i.e. relative to orbital) variations (vsnet-campaign-dn 3251).
SN 2002ap (RA = 01h36m23s.85, Dec = +15d45'13".0)
A. Henden reported that the object was V=19.5 on December 31. He
commented that there is an underlying star-formation region at this
location, so further quality photometry will have to wait until the
SNe fades (vsnet-campaign-sn2002ap 207, 208).
OJ287 (RA = 08h51m57s, Dec = 20d17'59")
The active state still continues (vsnet-campaign-blazar 294).
DI UMa (RA = 09h12m22s.16, Dec = +50d49'39".1)
A new outburst (15.4mag) was reported by G. Poyner on January 4
(vsnet-campaign-dn 3259).
AT Cnc (RA = 08h28m36s.92, Dec = +25d20'02".6)
The object is still in a standstill (vsnet-campaign-dn 3248).
RX J1155.4-5641 (RA = 11h55m27s.0, Dec = -56d41'53")
On January 3, the object brightened again following a
superoutburst (vsnet-campaign-dn 3229).
BU Tau (RA = 03h49m11s.19, Dec = +24d08'12".4)
D. West reported that BU Tau has not actually brightened, but
HD 23873, which was a comparison star he used, has apparently faded
(vsnet-campaign-be 207). On the other hand, S. Otero reported that
his observation on January 5 showed no fading of HD 23873
(vsnet-campaign 1359). D. West reported that BU Tau hasn't changed
in H beta magnitude since the observation of The Hauck and
Mermilliod 1998 catalog (vsnet-campaign-be 208, vsnet-campaign 1360).
V844 Her (RA = 16h25m01s.69, Dec = +39d09'25".9)
The superoutburst continues (vsnet-campaign-dn 3218).
V803 Cen (RA = 13h23m44s.5, Dec = -41d44'30".1)
It again showed a bright outburst (12.8mag) on December 31, as
reported by R. Stubbings (vsnet-campaign-dn 3217). The outburst
quickly faded on January 2 (vsnet-campaign-dn 3223). It again
brightened to 14.4mag on January 4 (vsnet-campaign-dn 3249).
RR Tau (RA = 05h39m30s.53, Dec = +26d22'26".3)
The object is now recovering from the last deep fading
(vsnet-campaign-orion 39).
U Gem (RA = 07h55m05s.55, Dec = +22d00'09".2)
The object is fading from the outburst (vsnet-campaign-dn 3214, 3221).
MisV1147 (RA = 22h54m03s.78, Dec = +58d54'02".1)
It has brightened from the last fading in the end of December
(vsnet-campaign-unknown 169).
V854 Cen (RA = 14h34m49s.8, Dec = -39d33'18")
It is now faint, as reported to be 13.5mag by R. Stubbings on
December 31 (vsnet-campaign-rcb 87).
ASAS 000155-6707.7 (RA = 00h01m54s.2, Dec = -67d07'49")
M. Morel commented that this variable is included in the Downes &
Shara _Living Edition_ of their Catalog and Atlas of CVs under the
name 1RXS J0001-6707, with max. mag of 13.4. The ASAS3 catalogue
gives a light curve, showing two maxima which have the
characteristic rapid rise and fall of a UG star, but the amplitude
is a bit small, only 2.5 mag (vsnet-campaign-dn 3256).
*** Future schedule ***
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]
WEBT campaign on Mkn 421
M. Villata announced possible WEBT campaign on Mkn 421, in
December 2002 and February-March 2003, to be carried out during
multifrequency campaigns.
The relevant information on the MW campaign of December 2-16 is at
the VERITAS site <http://veritas.sao.arizona.edu> .
[vsnet-campaign-blazar 287]
[vsnet-campaign-blazar 288]
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]
[vsnet-campaign-sn 512]
*** General information ***
VW Tuc
Chart and Preliminary Sequence provided by M. Simonsen:
http://joevp.20m.com/charts/provisional/
[vsnet-campaign-dn 3225]
Information of comparison stars by B. Skiff, see
[vsnet-campaign-dn 3227]
Image taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/VW_Tuc/vwtucmon.gif
[vsnet-campaign-dn 3234]
Image taken by B. Heathcote:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/VW_Tuc/heathcote.jpg
[vsnet-campaign-dn 3241]
Image taken by P. Nelson:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/VW_Tuc/nelson.jpg
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/VW_Tuc/nelson.gif
[vsnet-campaign-dn 3261]
NSV 10934
Chart and Preliminary Sequence provided by M. Simonsen:
http://joevp.20m.com/charts/provisional/
[vsnet-campaign-dn 3226]
Image taken by C. Stockdale:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/NS10934/stockdale1.gif
Image taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/NS10934/monard1.gif
[vsnet-campaign-dn 3235]
Superhump profile:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/NSV10934/nsvsh.gif
VSNET Special Page:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/nsv10934.html
[vsnet-campaign-dn 3239]
ASAS 000155-6707.7
Sequence, see [vsnet-campaign-dn 3256]
V838 Mon
Recent multicolor observations by S. Kiyota, see
[vsnet-campaign-v838mon 406]
(also see, [vsnet-campaign-v838mon 407, 408]
VSNET 2002
The annual review of [vsnet-campaign] is now available from the
top page of VSNET, or directly at:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Summary/vsnet2002/vsnet2002.html
(This summary can be cited.)
Regards,
Makoto Uemura
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page