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[vsnet-campaign 1365] VSNET Weekly Campaign Summary
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
XTE J1720-318 (RA = 17h20m00s, Dec = -31d44'.8)
R. A. Remillard et al. reported the detection of a new X-ray
transient by the RXTE/ASM team. It reached 430mCrab on January 10.
The ASM hardness ratios indicate that the spectrum was moderately
hard Jan. 9-10 and relatively soft on Jan. 13. These results
resemble the early spectral evolution of X-ray transients known to
contain an accreting black hole (vsnet-campaign-xray 173). The
object is suggested to be a black hole candidate in the so-called
"high" state (vsnet-campaign-xray 178).
HT Cam (RA = 07h57m01s.2 Dec = +63d06'00")
E. Muyllaert detected an outburst of HT Cam at 12.4mag on January
19.767. R. Ishioka commented that, during the last outburst
occurred in 2001 Decmber, about 8 min oscillation was detected. The
outburst will probably be very short (within 3 days), but there
still remains the possibility that this object is an SU UMa star and
this outburst is a superoutburst (vsnet-campaign-dn 3331,
vsnet-campaign-ip 98). A. Oksanen succeeded in obtaining
time-series data on January 19/20, 23:23-03:00 UT. The resulting
light curve showed lots of 9-10 minute 0.1 mag oscillations and
larger 'flares', one lasted 20 minutes. There was a fading trend but
it turned to slow rise after 2 UT (vsnet-campaign-dn 3336,
vsnet-campaign-ip 101). The rare, (probably) short-duration
outburst is now ongoing (vsnet-campaign-ip 99, 100,
vsnet-campaign-dn 3333, 3335).
SDSSp_J083845.23+491055.5 (RA = 08h38m45s.23, Dec = +49d10'55".5)
M. Simonsen reported a possible outburst (14.5:mag) of the SDSS
CV, SDSSp J083845.23+491055.5 on January 17. Confirmatory
observations are strongly encouraged (vsnet-campaign-dn 3330).
SN 2003L (RA = 11h03m12s.33, Dec = +11d04'38".3)
The position of the new object about 9" west and 2" north of
the center of a spiral galaxy NGC 3506. It is superimposed on the
bright western arm. The expected maximum for typical SN Ia is mag
about 16.4 (vsnet-campaign-sn 535, 537, 538).
SN 2003M (RA = 12h13m21s.00, Dec = +21d38'48".4)
The position of the new object is about 38" east and 44" north of
the nucleus of an elliptical galaxy UGC 7224. Several small
galaxies are seen around this galaxy. The expected maximum for
typical SN Ia is mag about 16.7 (vsnet-campaign-sn 535, 537, 538).
SN 2002kg (RA = 07h37m01s.83, Dec = +65d34'29".3)
A host galaxy of SN 2002kg is a nearby (about 3.5 Mpc) spiral
galaxy NGC 2403. The UCB team spectrum revealed that it is type IIn
supernova, resembling SNe 1997bs or 2000ch, which have been
suggested to be a superoutburst of the luminous blue variables, like
eta Car. The absolute magnitude of SN 2002kg is now about -8, which
is even lower than that of SN 2000ch or resembling SN IIn (around
-12 at its short-lived maximum). SN 2000ch was caught in the
"premaximum halt" during a few years until its maximum (see IAUC
7415, 7417, 7419, and 7421), so possibly SN 2002kg will become
brighter. Interestingly, SN 1954J in the same galaxy NGC 2403
(maximum B=16.5) was also very dim SN, and Smith et al. 2001, PASP,
113, 692 suggest that SN 1954J is of this class (vsnet-campaign-sn 540).
HX Peg (RA = 23h40m23s.37, Dec = +12d37'44".0)
An outburst of 12.9mag was reported by G. Poyner on January 15.
The object was in standstill until early January (vsnet-campaign-dn 3325).
SN 2002kj (RA = 00h35m24s.73, Dec = +03d59'11".4)
A host galaxy of SN 2002kj is a dim (mag about 16) anonymous
spiral? galaxy (vsnet-campaign-sn 541).
NSV02872 (RA = 06h14m08.2s, Dec = +45d30m29s)
According to V. P. Kozhevnikov (A&A 398, 267, 2003), the (at least
once) suspected cataclysmic variable, NSV02872, is found to show a
87.65-min periodicity. From the presence of a K-type stellar
spectrum, Kozhevnikov suggested a possibility of an intermediate
polar (vsnet-campaign-ip 97).
(continuous targets)
CP Dra (RA = 10h15m39s.88, Dec = +73d26'05".4)
The object has faded from the superoutburst, as reported by
A. Oksanen on January 16 (18.0C mag) (vsnet-campaign-dn 3328).
SN 2003H (RA = 06h16m25s.68, Dec = -21d22'23".8)
IAUC 8047 informed that spectra taken with Baade-6.5m telescope on
Jan. 9 and 10 UT revealed that it was type IIb SN. It resembles SN
Ib 1984L before maximum light (vsnet-campaign-sn 536). The red
color of the SN was due to a significant reddening within the host
galaxy (vsnet-campaign-sn 539).
SN 2003I (RA = 09h27m29s.48, Dec = +03d55'45".6)
The CfA team has revealed that it was type Ib SN about one week
after maximum (vsnet-campaign-sn 539).
SN 2003J (RA = 12h10m57s.72, Dec = +50d28'31".8)
The position of the new object is about 65" west and 32" south of
the nucleus of a nearby (v_r = 774 km/s from NED) and nearly edge-on
spiral galaxy NGC 4157. It is superimposed on the inner disk
region. The Bisei spectrum taken on Jan 12.8 UT revealed that it is
normal type-II SN (vsnet-campaign-sn 534). Note that NGC 4157 had
produced SN IIP 1937A (maximum mag about 15.0) and SN 1955A (caught
at mag about 16.0p after maximum)(vsnet-campaign-sn 535, 537, 538).
SN 2003K (RA = 15h32m01s.91, Dec = +68d14'35".9)
The position of the new object is about 6" east and 10" south of
the center of a spiral galaxy IC 1129. It is superimposed on the
faint disk region. The Bisei spectrum taken on Jan 12.9 revealed
that it is type Ia SN several days before maximum light
(vsnet-campaign-sn 534). The expected maximum (from the recession
velocity of the host galaxy) for typical SN Ia is calculated as mag
about 16.4, so the discovery magnitude (15.4C mag) is very bright.
It may indicate that it is nearer than estimated from v_r, or is
intrinsically bright one. The expansion velocity, which tends to be
large in luminous SN Ia, was rather normal (12000 km/s)
(vsnet-campaign-sn 535, 537, 538).
NSV 10934 (RA = 18h40m52s.26, Dec = -83d43'10".24)
T. Richards reported that the object was still in superoutburst on
January 10 and 12. On January 10, 4 superhumps of 0.2 mag were
detected with shoulders on declining side. The light curve also
showed some evidence of QPOs at 2-3 min frequency. On January 12,
superhumps were still detected with amplitudes of 0.1-0.2mag. The
shoulder in the superhump decline became a secondary peak
(vsnet-campaign-dn 3319). T. Kato reported that the combined data
sets yielded a refined superhump period of 0.074782(5) d
(vsnet-campaign-dn 3320). On January 14, P. Nelson reported a start
of rapid fading from the superoutburst (vsnet-campaign-dn 3322, 3327).
In the light curve on January 15 obtained by P. Nelson, the rapid
fading almost stopped, and it was dominated by hump-like structures,
which look like to comprise a double wave modulation within one
super or orbital cycle (vsnet-campaign-dn 3324).
CH Cyg (RA = 19h24m33s.07, Dec = +50d14'29".5)
The object is still gradually brightening (vsnet-campaign-symbio 44).
UV Gem (RA = 06h38m44s.16, Dec = +18d16'11".5)
A. Oksanen reported on January 13 that the object was still in
superoutburst and showed 0.2mag superhumps (vsnet-campaign-dn 3318).
T. Kato reported that the mean superhump period between Jan. 8 and
14 is 0.09265 d, which indicates that the shortening trend of the
superhump period continued. The maximum times during this interval
are relatively well expressed by a single period derivative,
although there is some emerging evidence of a further stepwise
transition (vsnet-campaign-dn 3321). A rapid fading from the
superoutburst was reported by A. Oksanen on January 16 when it was
16.2C mag (vsnet-campaign-dn 3328, 3326).
IM Nor (RA = 15h39m26s.47, Dec = -52d19'18".2)
Recently reported observations show that the object entered a
final fading stage after decline from the plateau
(vsnet-campaign-nova 1149).
Z UMi (RA = 15h02m01s.35, Dec = +83d03'48".7)
The faint state still continues (vsnet-campaign-rcb 88).
DI UMa (RA = 09h12m22s.16, Dec = +50d49'39".1)
The analysis of K. Tanabe's data taken on Jan. 15 revealed the
emergence of 0.2-mag superhumps in DI UMa. The object has
definitely entered a new superoutburst. The object was rising on
Jan. 13, but with no prominent superhumps. Together with the long
duration of the 2002 December superoutburst and the recent
activities, the outburst activity of DI UMa now bears intermediate
properties between ER UMa and RZ LMi. The present observation now
firmly establishes the existence of a transition between ER UMa-like
and RZ LMi-like behavior within the same object (see also Fried et
al. 1999, PASJ 111, 1275 for an earlier suggestion of the change
with less conclusive evidence) (vsnet-campaign-dn 3329).
V803 Cen (RA = 13h23m44s.5, Dec = -41d44'30".1)
The object is still in the oscillating, bright state
(vsnet-campaign-dn 3334).
delta Sco (RA = 16h00m19s.9, Dec = -22d37'17")
The object is now very bright. Visual observations have shown
1.7-1.8mag since early January, and D. West reported V=1.67 on
January 18 (vsnet-campaign-be 210).
MisV1147 (RA = 22h54m03s.78, Dec = +58d54'02".1)
The Kyoto observation on January 16 showed that MisV1147 faded
again. The fading seems to be shallower (as yet) than the past deep
fadings (vsnet-campaign-unknown 175).
ASAS 000155-6707.7 (RA = 00h01m54s.2, Dec = -67d07'49")
V. Tabur reviewed images and reported several detections of the
object at the peak (12th mag) on 2000 Jan. 4, Dec. 23, 2001 Jul. 20,
and 2002 Jul. 10 (vsnet-campaign-dn 3323).
FI Cas (RA = 00h06m10s.07, Dec = +55d58'51".1)
T. Kato analyzed the time-series observation by K. Torii on
January 5, and reported that no overall fading trend was observed
during the run. An inspection of ~5 hr time-series photometry did
not reveal superhumps, suggesting that the outburst was an SS
Cyg-type outburst rather than a superoutburst (vsnet-campaign-dn 3332).
SN 2002hz (RA = 22h27m49s.54, Dec = +38d35'09".5)
A spectrum taken by the UCB team on Jan. 7 suggests that it was
type Ib SN roughly 2 months after maximum light (vsnet-campaign-sn 540).
*** 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]
[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 ***
NSV 10934
Superhump profile:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/NSV10934/10934sh.gif
[vsnet-campaign-dn 3320]
XTE J1720-318
Optical CCD image of the field taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/Xray/XTEJ1720/mon0116.gif
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/Xray/XTEJ1720/mon0116.fit
[vsnet-campaign-xray 174, 175,
176, 177, 179]
VSNET page:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Xray/xtej1720.html
[vsnet-campaign-xray 180]
HT Cam
Preprints by Ishioka et al.
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/preprints/HT_Cam/
VSNET page
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/htcam.html
[vsnet-campaign-dn 3331]
[vsnet-campaign-ip 98]
(This summary can be cited.)
Regards,
Makoto Uemura
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
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