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[vsnet-campaign 691] VSNET Weekly Campaign Summary
(sorry, the summary previously I sent includes some errors.
this is a correct version.)
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
AM Her (RA = 18h16m13s.4, Dec = +49d52'03".1)
The polar prototype AM Her has definitely entered a faint
(low) state. It now seems to be fainter than 14.0mag.
The last (short) faint state was observed in 2000 April-May
(vsnet-campaign 682).
SN 2000G (RA = 09h09m33s.18, Dec = +50d16'51".3)
SN 2001G has been discovered by M. Armstrong on January 8.051
at mag 16.1, and 4 days later it has brightened to mag 15.2.
The location is 2" east and 4" south of the center of dim (mag 16)
galaxy MCG +08-17-43. NED does not give the type of the galaxy
and its recession velocity, but it seems to be a nearly edge-on spiral.
Several foreground stars are there around the galaxy. The new object
is quite near to the central bright part (vsnet-campaign-sn 131).
V344 Ori (RA = 06h15m20s.18, Dec = +15d27'59".2)
As reported by R. Stubbings on January 15, the dwarf nova
V344 Ori is reported to be undergoing a relatively rare,
bright outburst. The last outburst was reported in 1999 November
(mv=14.0), but the present outburst is the brightest in recent years.
(continuous targets)
RX J0944.5+0357 (RA = 09h44m31s.8, Dec = +03d58'06")
Time-series photometry provided by S. Kiyota on January 5
and 6 is available at [vsnet-campaign-data 58 and 59].
The object faded by nearly 1 mag between January 5 and 6.
T. Kato commented that the rapid fading suggests that the object
may be a short-period system, or even an SU UMa-type star in
normal outburst (vsnet-campaign 667).
SN 2001B (RA = 04h57m19s.24, Dec = +78d11'16".5)
K. Kadota and T. Vince provided CCD images on January 6 at
his web page and on January 12 at VSNET ftp site, respectively
(see below "General Information"; vsnet-campaign-sn 127, 129).
The object now become about 1mag brighter than its discovery
magnitude (15.5C:) (vsnet-campaign-sn 128, 130).
SN 2001C (RA = 06h59m36s.10, Dec = +59d31'01".6)
K. Kadota, T. Vince, and J. Hambsch provided CCD images on
January 6 at his web page and on January 12 and 13 at VSNET ftp
site, respectively (see below "General Information";
vsnet-campaign-sn 127, 129, 132).
V445 Pup (RA = 07h37m56s.88, Dec = -25d56'59".1)
(= Possible Nova in Pup)
An hour run on January 6/7 by G. Masi yields no particular
fluctuations larger than 0.1 mag (vsnet-campaign-nova 146).
S. Otero reported a fading to 9.7mag on January 9 after several
days at 9.1mag (vsnet-campaign-nova 148) and commented about
some sequence problems (vsnet-campaign-nova 147; see also
vsnet-campaign-nova 150; vsnet-campaign 668). The object somewhat
recovered on January 9 and 10 (vsnet-campaign-nova 151, 152).
S. Otero reported it is oscillating stronger as seen in his
January 11 observations (vsnet-campaign-nova 153, 154).
The object was given an official GCVS name V445 Pup
(vsnet-campaign-nova 155). S. Otero reported the object on
January 12 was rather quiet at 9.1mag (vsnet-campaign-nova 156, 157, 159).
A short-term fading was detected on January 13 (vsnet-campaign-nova 160).
On January 15, a fading to 9.7mag was observed (vsnet-campaign-nova 162).
RZ Leo (RA = 11h37m22s.27, Dec = +01d48'58".9)
The Ic-band observations on January 6 by S. Kiyota are available
at [vsnet-campaign-data 57] (vsnet-campaign 666). From the
observation at Kyoto on January 8 and Kiyota's data, T. Kato
reported the decline rate has become apparently slower
(vsnet-campaign 669). The Kyoto observation on January 11
(by Uemura et al.) shows that RZ Leo has apparently stopped
fading (vsnet-campaign 671). On January 12, R. Ishioka, at Kyoto,
found a re-brightening (vsnet-campaign 672). T. Kato mentioned the
interval between the fading from the main superoutburst and the
rebrightening is only ~5 days, which is one of the shortest ever
observed in SU UMa-type dwarf novae (vsnet-campaign 673).
The Kyoto team and S. Kiyota obtained a nearly continuous light
curve of the rebrightened RZ Leo on January 11 in which the object
returned to its pre-fading magnitude, as on January 4. Although
low-amplitude variations were present, superhumps were less prominent
than on January 4 (vsnet-campaign 674). The Kyoto data and
S. Kiyota's data on January 12 shows that the object had not yet
entered the rapid decline from the rebrightening (vsnet-campaign 680, 681).
The Kyoto observation on January 13 (Ishioka et al.) has shown
that RZ Leo entered the rapid decline stage (vsnet-campaign 684).
The Kyoto observation (observer Uemura) on January 14 confirms that
the rapid fading of RZ Leo stopped. The brightness level above
quiescence is rather reminiscent of the inter-rebrightening period
of the WZ Sge-type star EG Cnc (vsnet-campaign 687).
UV Per (RA = 02h10m13s.58, Dec = +57d11'26".8)
The Kyoto observation on January 10 (by Iwamatsu et al.) shows
that UV Per has apparently stopped fading (vsnet-campaign 670).
On January 12, R. Ishioka found its rebrightening (vsnet-campaign 675).
T. Kato mentioned that the interval between the fading from the
main superoutburst and the rebrightening is about 7 days, which
is a relatively typical value for SU UMa-type rebrightening
(vsnet-campaign 676). T. Vanmunster also reported the rebrightening
to 14.3mag on January 12 (vsnet-campaign 677, vsnet-campaign-dn 393).
The Kyoto data on January 12 shows a rapid, smooth fading.
The rate of decline amounts to 1.7 mag/d, which is one of the
fastest time-scales observed in UV Per. There is no evidence of
large-amplitude superhumps (vsnet-campaign 679, vsnet-campaign-dn 394).
J. Pietz confirmed the same trend from his own observation on
January 12 (vsnet-campaign 683). The rapid fading trend was ongoing
on January 13 (vsnet-campaign-dn 395, vsnet-campaign 685).
The Kyoto team (observer Uemura) obtained a continuous coverage
of UV Per on January 14, in which the most remarkable feature is
the presence of large-amplitude modulations (up to 0.5 mag) with
a possible period of ~4 hours (vsnet-campaign 686).
BL Lac (RA = 22h02m42.86s, Dec = +42d16'37.6")
BL Lac is fading. The current magnitude seems to be around
V=15.0 (by R. Rodriguez on January 14)(vsnet-campaign-blazar 125).
TV Col (RA = 05h29m25s.5, Dec = -32d49'05".2)
The outburst on January 7 have rapidly terminated
(vsnet-campaign-ip 32, 33).
3C 66A (RA = 02h22m39s.6, Dec = +43d02'08")
The bright state continues. The current magnitude is
around 14.1 (vsnet-campaign-blazar 124).
Delta Sco (RA = 16h00m19s.9, Dec = -22d37'17")
The bright state continues (vsnet-campaign-be 77).
V803 Cen (RA = 13h23m44.5s, Dec = -41d44'30".1)
The bright outburst is ongoing (vsnet-campaign-dn 392).
WY Tri (RA = 02h25m12s.08, Dec = +33d00'31".5)
T. Vanmunster informed a manuscript on December 2000
outburst of WY Tri has been submitted to IBVS and also posted
to [vsnet-preprint 13] (vsnet-campaign 678).
*** Future schedule ***
TV Col campaign conducted by A. Retter (2001 January 2 - 15):
"Recently using previously published data, we discovered evidence for
another periodicity in the light curve of TV Col. The 6.4-h period would
be the longest recorded positive superhump. To confirm this period, I'll
carry out continuous photometry on TV Col during two weeks in January
(2-15) using the 0.75-m reflector with the UCT CCD in Sutherland, South
Africa.
I am calling for a campaign on TV Col during these nights. As the
candidate periodicity is relatively long, multi-longitude continuous
monitoring of the object is extremely important to reduce the aliasing
problem. So, if you can observe the object for at least ~4 h (preferably
more than one 6.4-h cycle), please let me know."
for more information, see [vsnet-campaign 579],[vsnet-campaign-ip 15]
*** General information ***
SN 2001B
CCD image provided by K. Kadota:
http://vsnet.astroarts.com/ageo/supernova/
[vsnet-campaign-sn 127]
CCD image provided by T. Vince:
http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/SNe/sn2001b/sn2001b.gif
[vsnet-campaign-sn 129]
SN 2001C
CCD image provided by K. Kadota:
http://vsnet.astroarts.com/ageo/supernova/
[vsnet-campaign-sn 127]
CCD image provided by T. Vince:
http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/SNe/sn2001c/sn2001c.gif
[vsnet-campaign-sn 129]
CCD image provided by J. Hambsch:
http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/SNe/sn2001c/sn2001c_300_s.jpg
[vsnet-campaign-sn 132]
WY Tri
preprint on December 2000 outburst, see [vsnet-preprint 13]
[vsnet-campaign 678]
(This summary is reproduction free.)
Regards,
Makoto Uemura
vsnet-adm@kusastro.kyoto-u.ac.jp
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
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