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VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
EU CMa (RA = 07h05m40s.28, Dec = -16d08'44".4)
As reported by R. Stubbings in [vsnet-outburst 5266], a poorly
known dwarf nova, EU CMa experienced an outburst on Feb. 25. The
Kyoto team promptly confirmed that the object was bright at 15.1mag
(vsnet-campaign-dn 3491). The light curves obtained by B. Monard and
the Kyoto team were rather flat, with a slow mean decline rate of 0.2
mag/day. T. Kato commented that the mean decline rate is
inconsistent with a normal outburst of an SU UMa-type dwarf nova.
The data more suggest an SS Cyg-type dwarf nova, although the full
amplitude of the outburst may be incompatible with this
classification (vsnet-campaign-dn 3508, 3514). A rapid fading was
reported on Mar. 2 (vsnet-campaign-dn 3500, 3503, 3506, 3510,
3515, 3517).
GX 339-4 (RA = 17h02m49s.4, Dec = -48d47'22")
According to ATEL #120, the black hole candidate GX 339-4 = V821
Ara has apparently entered a low/hard state. This source is known
to show short-term variations; time-resolved photometry, if
possible, is preferable (vsnet-campaign-xray 197).
RX Oph (RA = 16h52m48s.2, Dec = +05d24'27")
The object is now in an exceptionally bright maximum. A. Diepvens
reported 8.2mag on Feb. 23, and G. Comello reported 7.9mag on
Feb. 25 (vsnet-campaign-mira 33).
SN 2003ax (RA = 08h08m35s.53, Dec = +07d46'42".2)
SN 2003ax is hosted by an anonymous spiral galaxy making a distant
cluster (vsnet-campaign-sn 567). The UCB team revealed that it was a
SN Ia, about 2 weeks after maximum on Feb. 27 (vsnet-campaign-sn 569).
SN 2003ay (RA = 04h07m26s.25, Dec = +28d07'55".4)
SN 2003ay is apparently hosted by a very dim anonymous galaxy
(vsnet-campaign-sn 567). The UCB team reported that it is a type Ia
SN (vsnet-campaign-sn 571).
V Sge (RA = 20h20m14s.75, Dec = +21d06'09".0)
V Sge is now bright at 10th mag (vsnet-campaign-nl 109).
SN 2003bf (RA = 08h08m26s.35, Dec = +12d19'56".2)
SN 2003bf is hosted by LEDA 100775 = 2MASXi J0808266+121957, a dim
apparently disk galaxy. The expected maximum for typical SN Ia is
coincident to the reported magnitudes (17.6C and 17.2C
mag)(vsnet-campaign-sn 568). The UCB team showed that it was of type
Ia around maximum on Feb. 27 (vsnet-campaign-sn 569).
SN 2003bg (RA = 04h10m59s.42, Dec = -31d24'50".3)
SN 2003bg is hosted by MCG -05-10-15, a nearby barred-spiral galaxy.
The expected maximum for typical SN Ia is mag about 13.0
(vsnet-campaign-sn 568). The UCB team suggests that its spectrum
resembles to that of peculiar type Ic SN (or type-Ic hypernova)
about 2 weeks after explosion. SN2003bg is quite nearby object
(comparable to the Virgo cluster), the followup magnitude estimates
and drawing the light curve is encouraged (vsnet-campaign-sn 570).
SN 2003bh (RA = 10h00m06s.27, Dec = +28d16'52".0)
SN 2003bh is hosted by an apparent spiral galaxy. The UCB team
with the Keck I telescope revealed that it was type Ia SN, about 1
month after maximum on Feb. 27. The recession velocity of the
host galaxy is about 26700 km/s (vsnet-campaign-sn 570).
SN 2003bi (RA = 10h44m05s.97, Dec = +12d31'34".7)
SN 2003bi is hosted by MAPS-NGP O_492_0145839, a small disk(?)
galaxy. The UCB team revealed that it was type Ia SN near maximum
on Feb. 28. The recession velocity of the host galaxy is about
28000 km/s (vsnet-campaign-sn 570).
SN 2003bj (RA = 13h18m29s.10, Dec = -31d37'37".7)
SN 2003bj is hosted by IC 4219, a face-on open-spiral galaxy. The
expected maximum for typical SN Ia is about the discovery
magnitude (15.1mag)(vsnet-campaign-sn 571).
V2756 Sgr (RA = 18h14m34s.0, Dec = -29d49'21")
P. Williams reported that the ZAND star V2756 Sgr appears to be in
eclipse on March 1 when it was 13.8mag (vsnet-campaign-symbio 50).
(continuous targets)
KS UMa (RA = 10h20m26s.54, Dec = +53d04'33".5)
A. Olech et al, reported that amplitude of the superhumps
increased from 0.14 to 0.18 mag between Feb 23-24 (vsnet-campaign-dn
3493). After Feb. 25, the superhump profile has dramatically
changed. On Feb. 26, the superhump amplitudes varied from superhump
to superhump, sometimes accompanied by a large amplitude fluctuation
resembling dips. On late Feb. 26-27, the profile sometimes changed
to "triple peaks", which remind us of the profile sometimes seen
during the 2001 superoutburst of WZ Sge. There has also been a
dramatic change in the evolution of the superhump period. During
this interval, the superhump period suddenly decreased to 0.06987 d,
in contrast to the rather stable, but probably oscillating, trend
before this change (except for the early evolutionary stage)
(vsnet-campaign-dn 3505, 3512). The object entered a rapid fading
phase from the superoutburst on March 2 (vsnet-campaign-dn 3486,
3488, 3496, 3501, 3507, 3509, 3516).
delta Sco (RA = 16h00m19s.9, Dec = -22d37'17")
The object is reported to brighten to 1.7mag again
(vsnet-campaign-be 225).
T Ori (RA = 05h35m50s.33, Dec = -05d28'39".1)
T. Lange reported on Feb. 27 that T. Ori was very dark, 11-12 mag
(vsnet-campaign-orion 41).
SN 2003V (RA = 03h05m43s.05, Dec = -01d24'12".8)
The UCB team revealed that it was type Ia SN, about 2 months after
maximum on Feb. 27 (vsnet-campaign-sn 569).
SN 2003ah (RA = 04h43m08s.54, Dec = +00d46'00".4)
The spectroscopic observation by the UCB team showed that it was
type Ia SN, about 12 days after maximum on Feb. 27
(vsnet-campaign-sn 569).
SN 2003ac (RA = 12h21m47s.35, Dec = +25d52'33".1)
Its type II SN nature was revealed by the UCB team
(vsnet-campaign-sn 571).
V854 Cen (RA = 14h34m49s.8, Dec = -39d33'18")
The brightening trend has stopped (vsnet-campaign-rcb 108).
SN 2003am (RA = 13h20m43s.57, Dec = -22d02'53".5)
The object turned out to be a type II SN (vsnet-campaign-sn 571).
SN 2003au (RA = 16h11m11s.56, Dec = +61d15'58".2)
The UCB team showed that it was a subluminous type Ia one month
after the maximum (vsnet-campaign-sn 571).
SN 2003av (RA = 08h01m32s.57, Dec = +02d48'27".9)
The UCB team showed that it was SN Ia, about 2 weeks after maximum
on Feb. 27 (vsnet-campaign-sn 569).
SN 2003an (RA = 13h27m53s.55, Dec = +28d30'29".2)
According to the spectroscopic observation by the UCB team, the
object was a type Ia SN 2 weeks after the maximum (vsnet-campaign-sn 571).
SN 2003aq (RA = 14h10m07s.24, Dec = +17d37'05".3)
The UCB team revealed that it is a type II SN (vsnet-campaign-sn 571).
SN 2003aw (RA = 09h05m54s.79, Dec = -05d36'08".6)
According to IAUC No. 8084, "SN2003aw" looks like to be a
hydrogen-deficient dwarf nova resembling KL Dra = SN1998di. The
duration of the current bright state suggests a superoutburst, if
this type classification is correct (vsnet-campaign-dn 3511).
Woudt and Warner report in IAUC No. 8085 that they detected a
periodic signal of 2034s. From this periodicity and the
spectroscopic description, they suggested that the object is a
double-degenerate helium-transferring binary (AM CVn star). The
period is supposed to reflect superhumps. Woudt and Warner also
reported the existence of shallow eclipses. If this feature is
confirmed, the object is the first AM CVn star with eclipses
(vsnet-campaign-dn 3513).
TmzV868 (RA = 01h47m57s.596, Dec = +56d17'36".85)
S. Yoshida reported the photometry by the MISAO project. Based on
results, he concluded that no evident variation of TmzV868 was
detected, which supports that TmzV868 is not a Mira-type object as
originally supposed. Nearby IRAS 01446+5602 may be a red variable,
but it does not mean the mis-identification of TmzV868
(vsnet-campaign 1373, vsnet-campaign-unknown 193).
QW Ser (RA = 15h26m13s.99, Dec = +08d18'03".8)
A. Olech et al. reported that they detected well developed
superhumps with amplitude of 0.25 mag on Feb. 23/24, and period
equal to 0.0770(3) d using Feb. 23-24 observations
(vsnet-campaign-dn 3485, 3494). The superoutburst continues
(vsnet-campaign-dn 3489, 3502).
SU UMa (RA = 08h12m28s.20, Dec = +62d36'22".6)
The faint state was terminated by an outburst on Feb. 24
(vsnet-campaign-dn 3487).
YY Her (RA = 18h14m34s.2, Dec = +20d59'21")
The outburst was also reported by G. Comello on Feb. 14 and 25
(vsnet-campaign-symbio 49). The outburst is still ongoing
(vsnet-campaign-symbio 51).
CAL 86 (RA = 05h46m18s.2, Dec = -68d35'37")
B. Monard reported a fading of the object from observations on
Feb. 24 and 25. T. Kato commented that, although the fading rate is
consistent with that of a normal outburst of an SU UMa-type dwarf
nova, the outburst amplitude (nearly 6 mag) looks exceptional for
such a short outburst (vsnet-campaign-dn 3495). The light curve
taken by B. Monard on Feb. 24 shows that the object was fading at a
rate of 1.1 mag/d. Although there seems to be a weak signal with a
period of ~0.07 d, its amplitude is less than 0.02 mag. These
modulations, if any, may be related to orbital humps
(vsnet-campaign-dn 3498). The fading rate became larger on Feb. 25
(2 mag/d). The light curve bears some resemblance to short (normal)
outbursts of NSV 10934. T. Kato commented that, combined with the
unusual X-ray strength and the precipitous fading during the late
outburst stage, the same discussion in HT Cam and NSV 10934 would
apply to CAL 86 (vsnet-campaign-dn 3504). The object has rapidly
faded (vsnet-campaign-dn 3497).
SN 2003aa (RA = 10h46m36s.82, Dec = +13d45'32".2)
The UCB team suggests that it is a subluminous SN Ia
(vsnet-campaign-sn 570).
beta CMi (RA = 07h27m09s.24, Dec = +08d17'23".4)
The object seems to be normal (vsnet-campaign-be 224,
vsnet-campaign-ccd-discussion 46).
R CrB (RA = 15h48m34s.40, Dec = +28d09'23".7)
The object experiences a deep fading (vsnet-campaign-rcb 104,
105, 106). It may have reached the minimum at 12.8-12.9mag in early
March (vsnet-campaign-rcb 107, 109).
GZ Cnc (RA = 09h15m51s.70, Dec = +09d00'50".2)
The object started fading from the outburst on Feb 22 and 23
(vsnet-campaign-dn 3490).
NSV 10934 (RA = 18h40m52s.26, Dec = -83d43'10".24)
An outburst of 12.7mag was reported on Feb. 25 by R. Stubbings
(vsnet-campaign-dn 3499).
V504 Cen (RA = 14h12m49s.36, Dec = -40d21'02".2)
As reported by R. Stubbings on Feb. 23, the VY Scl-type
cataclysmic variable V504 Cen seems to have started a new fading,
following a brief bright state around 13.0mag (vsnet-campaign-nl 108).
MisV1147 (RA = 22h54m03s.78, Dec = +58d54'02".1)
A recovery from the last faint minimum was observed on Feb. 22 and
23 (vsnet-campaign-unknown 192).
eta Gem (RA = 06h14m52s.87, Dec = +22d30'24".5)
D. West reported that the predicted eclipse at JD 2447259 isn't
obvious in the combined light curves from AAVSO, BAA, VSNET, SPA,
and APT (vsnet-campaign-ecl 64).
*** Future schedule ***
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]
[vsnet-campaign-xray 172]
Light curve provided by S. Otero:
http://ar.geocities.com/varsao/Curva_Eta_Carinae.htm
[vsnet-campaign-sdor 22]
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 ***
KS UMa
Time-series observation by L. Kral, see [vsnet-campaign-data 110]
Light curve obtained by T. Vanmunster:
http://vsnet.cbabelgium.com
[vsnet-campaign-dn 3492]
EU CMa
Outburst image taken by the Kyoto team:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/EU_CMa/eucmatmp.gif
[vsnet-campaign-dn 3491]
CAL 86
Outburst image taken by B. Heathcote:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/CAL86/heath1.gif
Outburst image taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/CAL86/mon1.gif
[vsnet-campaign-dn 3495]
TmzV868
MISAO Project page:
http://vsnet.aerith.net/misao/report/variable/TmzV868.html
http://vsnet.aerith.net/misao/report/variable/TmzV868/chart.gif
http://vsnet.aerith.net/misao/report/variable/TmzV868/curve-JD.gif
http://vsnet.aerith.net/misao/report/variable/TmzV868/curve-image.gif
[vsnet-campaign 1373]
[vsnet-campaign-unknown 193]
Active SDOR stars reported by S. Otero:
AG Car
http://ar.geocities.com/varsao/Curva_AG_Car.htm
HR Car
http://ar.geocities.com/varsao/Curva_HR_Car.htm
eta Car
http://ar.geocities.com/varsao/Curva_Eta_Carinae.htm
[vsnet-campaign-sdor 27]
Needs More Observations (NMO) Campaign
M. Simonsen announced a new campaign, as a planning tool to help
encourage observers to submit more observations of these neglected
stars.
http://home.earthlink.net/~joevp/nmo.html
http://home.earthlink.net/~joevp/nmolist.html
[vsnet-campaign-mira 34]
and also see, [vsnet-campaign-mira 35,
36, 37, 38, 39, 40, 41, 42]
Discussion about "Request for AIP4WIN and other CCD photometry
software"
[vsnet-campaign-ccd-discussion 47, 48, 49, 50, 51, 52, 53, 54]
VSNET page for nova discovery reporting tips:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/etc/discovery.html
[vsnet-campaign-nova 1158]
and also see, [vsnet-campaign-nova 1155, 1156,
1157, 1159, 1160, 1161, 1162,
1163]
(This summary can be cited.)
Regards,
Makoto Uemura
Return to the Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
