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[vsnet-campaign 784] VSNET Weekly Campaign Summary
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
V893 Sco (RA = 16h14m45.26s, Dec = -28d39m30.3s)
The eclipsing dwarf nova below the period gap V893 Sco
experienced an outburst (13.7mag) on February 12 as reported
by A. Pearce (vsnet-campaign-dn 473, 474). The fading from
the outburst was reported on the next day (vsnet-campaign-dn 480).
This indicates the outburst was a normal one.
BZ Cam (RA = 06h29m34s.49, Dec = +71d04'39".5)
M. Reszelski and H. Itoh independently detected a sudden
fading to 13.1mag of the VY Scl-type variable BZ Cam on February 11.
The last fading (the second historical fading) of BZ Cam occurred
in 1998 (vsnet-campaign 762). It has rapidly recovered from
the fading to 12.4mag since February 15 (vsnet-campaign 765,
766, 780). These fast activity is atypical for this class.
SAX J1711.6-3808 (RA = 17h11m36s, Dec = -38d08'.5)
E. Kuulkers forwarded the draft of IAU Circ. which reports
the discovery of a new X-ray transient SAX J1711.6-3808.
The object was detected with BeppoSAX observations on February
8.8-11.5 (UT) at 30-80mCrab (2-9 keV) (vsnet-campaign-xray 62,
vsnet-campaign 763). The CCD images taken by the Kyoto team
show no promising optical counterpart (vsnet-campaign-xray 63).
AK Cnc (RA = 08h55m18s.49, Dec = +11d18'06".2)
As reported by E. Muyllaert on February 13, AK Cnc, an SU UMa-type
dwarf nova with a short orbital period, experienced an (relatively rare)
outburst (13.6mag). The last confirmed outburst occurred in
2000 Feb, which was a superoutburst (vsnet-campaign 764,
vsnet-campaign-dn 481, 483). The Kyoto team confirmed the outburst
on February 14, but the magnitude was slightly fainter
(vsnet-campaign-dn 484, 488). R. Ishioka, the Kyoto team, reported
the decline rate on February 15 indicates the outburst is a normal
one (vsnet-campaign-dn 489, 497, 501).
TT Boo (RA = 14h57m46s.46, Dec = +40d43'55".5)
TT Boo is apparently undergoing a superoutburst as reported by
H. McGee and E. Muyllaert on February 15 (vsnet-campaign-dn 490,
500, 502). The superoutburst is now ongoing and the current
magnitude is around 12.9 (vsnet-campaign-dn 505).
TV Crv (RA = 12h20m23s.56, Dec = -18d27'02".7)
According to M. Simonsen, the SU UMa-type dwarf nova TV Crv
is undergoing a bright (12.9mag on February 18) outburst.
Outbursts of TV Crv are relatively rare. The last outburst
occurred in 2000 March, which was a normal outburst.
The last superoutburst was observed in 1998 May (vsnet-campaign 767).
On February 19, the Kyoto team confirmed the outburst
(vsnet-campaign 768, 769). The Kyoto team performed time-series
observations on February 18 and 19, which yields modulations with
0.1mag amplitude, but the profile is not similar to normal
superhumps and may be related to early superhumps (vsnet-campaign 770,
781). The superoutburst is now ongoing and the current magnitude
is about 13.0 (vsnet-campaign-dn 506).
W Com (RA = 12h21m31s.53, Dec = +28d13'57".6)
The object is slightly active during the last week
(vsnet-campaign-blazar 152). The current magnitude is around 14.4.
New CVs for long monitoring campaign
from the MOA paper (Bond et al., astro-ph/0102181)
and the latest version of CV Catalog (Downes et al. )
MOA-ngb11-2-1011 (RA = 18h11m51s.18, Dec = -26d26'48".6) dwarf nova
[vsnet-campaign 760]
MOA-ngb13-2-1170 (RA = 18h16m56s.78, Dec = -23d29'50".9) dwarf nova
[vsnet-campaign 759]
NSV18704 = SN1985J (RA = 11h14m56s.7, Dec = +33d49'32") possible CV
[vsnet-campaign 771]
SN1989Z (RA = 11h58m32s.0, Dec = +43d56'58") possible CV
[vsnet-campaign 772]
(see also, vsnet-campaign 783)
SN1964O (RA = 15h08m50s.3, Dec = +55d28'07") possible CV
[vsnet-campaign 773]
FV Cnc (RA = 08h48m01s.6, Dec = +18d40'37") dwarf nova?
[vsnet-campaign 775]
FH Leo (RA = 11h06m07s.3, Dec = +07d01'59") nova-like?
[vsnet-campaign 776]
Nova Cep 1983 (RA = 22h13m45s.55, Dec = +57d01'14".4) possible nova
[vsnet-campaign 774]
(see also, vsnet-campaign 782)
PQ Ser (RA = 15h37m53s.7, Dec = +21d26'26") nova-like?
[vsnet-campaign 777]
V1440 Aql (RA = 19h05m00s.0, Dec = -07d08'30") nova-like?
[vsnet-campaign 778]
NSV17775 (RA = 08h10m06s.0, Dec = -49d14'18") nova-like?
[vsnet-campaign 779]
NSV25735 = StHA190 (RA = 21h41m44s.8, Dec = +02d43'53")
According to astro-ph/0102192, Munari et al. reports
the discovery of bipolar and highly variable mass outflow
in NSV25735 = StHA190. Such phenomena have been notably
known in R Aqr, CH Cyg, MWC 560 = V694 Mon, RS Oph and Hen3-1341.
NSV25735 = StHA190 is the first case that a yellow symbiotic
hosts such outflows. According to T. Watanabe, the object
has been photometrically highly variable (vsnet-campaign 761).
(continuous targets)
UV Gem (RA = 06h38m44s.16, Dec = +18d16'11".5)
The Kyoto team reported the decline rate is somewhat faster
(vsnet-campaign-dn 491, 492). B. Sumner and T. Vanmunster reported
accurate positions of this object (vsnet-campaign-dn 494, 495).
T. Vanmunster reported no obvious periodic modulation was seen in
the light curve during the outburst (vsnet-campaign-dn 495).
P. Schmeer reported the object coincides with an USNO-A2.0 star
with r=18.4 and b=18.6 (vsnet-campaign-dn 496). The Kyoto
observation on February 16 revealed that the object faded rather
rapidly (vsnet-campaign-dn 498). M. Uemura, the Kyoto team,
reported that the light curve during this outburst is not similar
to that of superoutbursts, and no promising periodic modulation
was detected while the duration is long for normal outbursts
(vsnet-campaign-dn 507).
V383 Vel (RA = 10h21m41s.7, Dec = -49d49'24".33")
A fading from the outburst was reported on February 12 by
A. Pearce (vsnet-campaign-dn 471).
QW Ser (RA = 15h26m13s.99, Dec = +08d18'03".8)
R. Novak reported the detection of superhumps (vsnet-campaign-dn 470).
The VSNET Collaboration team has received time-series photometry
taken by S. Kiyota on February 10 (vsnet-campaign-dn 472, 487).
The superoutburst continued until February 12 when the Kyoto team
detected a considerable fading from the plateau (vsnet-campaign-dn 476,
vsnet-campaign-dn 478, 485).
U Gem (RA = 07h55m05s.55, Dec = +22d00'09".2)
The slightly bright state continues (vsnet-campaign-dn 477, 504, 508).
The VSNET Collaboration team has received time-series photometry
taken by D. Buczynski (vsnet-campaign 758, vsnet-campaign-dn 486).
V445 Pup (RA = 07h37m56s.88, Dec = -25d56'59".1)
Time-series photometry taken by the Kyoto team on February 11
shows a rather flat light curve, but with some hint of short-term
variation (vsnet-campaign-nova 211). Slightly fainter magnitudes
(10.0 - 10.2) were reported on February 12 and 13, and then, the
brightness recovered on February 14 (vsnet-campaign-nova 210, 212).
The time-series photometry on February 14 shows short-term variation
with an amplitude no greater than 0.1mag (vsnet-campaign-nova 213).
The Kyoto team performed multi-color photometry on February 15,
and reported B-V=0.63, V-R=0.54, R-I=0.69 (vsnet-campaign-nova 214).
On February 16, reported observations show a gradual decline trend
(vsnet-campaign-nova 215, 216, 217).
3C 66A (RA = 02h22m39s.6, Dec = +43d02'08")
The fading continues (vsnet-campaign-blazar 143, 149).
Delta Sco (RA = 16h00m19s.9, Dec = -22d37'17")
The object is still bright around 2.0mag (vsnet-campaign-be 88, 89).
V803 Cen (RA = 13h23m44.5s, Dec = -41d44'30".1)
An outburst (13.8mag) was reported by A. Pearce on February 13
(vsnet-campaign-dn 479, 499, 503).
TV Col (RA = 05h29m25s.5, Dec = -32d49'05".2)
No outburst was reported during the last week (vsnet-campaign-ip 42).
GK Per (RA = 03h31m12s.50, Dec = +43d54'17".8)
The slightly bright state continues (vsnet-campaign-ip 41).
MKN 421 (RA = 11h04m27s, Dec = +38d12'32")
An observation reported by M. Simonsen on February 18 show an
outburst (12.6mag) (vsnet-campaign-blazar 147).
The active state continues (vsnet-campaign-blazar 151).
*** Future schedule ***
RZ LMi campaign conducted by J. Patterson on April 2001
For more information, see [vsnet-campaign 718, vsnet-campaign-dn 429].
BeppoSAX TOO observation of MS1458.8+2249
BeppoSAX will observe the BL Lac MS1458.8+2249 from the evening
of Monday, February 19, up to the morning of Wednesday, February 21.
Observations at other wavelengths are clearly recommended.
[vsnet-campaign-blazar 145]
(see also, vsnet-campaign-blazar 146)
MAXI workshop on AGN Variability
March 10-11, 2001, Nikko, Japan, Organized by RIKEN & NASDA
For more information, see [vsnet-campaign-blazar 144]
*** General information ***
V893 Sco
Eclipse ephemeris, see [vsnet-campaign-dn 474]
U Gem
Eclipse ephemeris, see [vsnet-campaign-dn 475]
(This summary can be cited.)
Regards,
Makoto Uemura
vsnet-adm@kusastro.kyoto-u.ac.jp
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page