[vsnet-campaign-news 280] VSNET Weekly Campaign Summary
Makoto Uemura
uemuram at hiroshima-u.ac.jp
Mon Jul 4 17:01:16 JST 2005
VSNET Weekly Campaign Summary
*** Headlines ***
An extremely rare outburst! ----- IL Vul
*** Last week news ***
(new targets)
IL Vul (RA = 20h38m32s.72, Dec = +22d42'16".7)
P. Schmeer reported an extremely rare outburst of IL Vul (15.5CR,
July 3.388). He commented that only one certain (1964) and two
rather certain outbursts (1930, 1955) of this dwarf nova were
observed before. T. Kato commented that the light curve presented
in IBVS 80 rather resembles that of a long outburst of an
SS Cyg-star (vsnet-campaign 1582).
V589 Her (RA = 16h22m07s.19, Dec = +19d22'36".3)
M. Simonsen reported his detection of an outburst (14.5 mag, July
2.234) of V589 Her (cvnet-outburst). T. Vanmunster reported that he
detected superhumps with a period of 0.0947(5) d during the long
outburst in 2002 April (vsnet-campaign 1580). Following the alert
of the current outburst, T. Vanmunster started an unfiltered CCD
photometry and found that V589 Her was at mag 15.2 (unfiltered).
The resulting light curve does not show modulations
(vsnet-campaign 1581).
2QZ J021927.9-304545 (RA = 02h19m22s.5, Dec = -30d45'10")
B. Monard reported an outburst of this object (11.9CR, July
2.171). P. Schmeer reported a mean cycle length of outbursts of
about 55 days, based on ASAS-3 data (vsnet-campaign-dn 4459).
KV Dra (RA = 14h50m38s.25, Dec = +64d03'28".3)
P. Schmeer reported a faint outburst of KV Dra
(vsnet-campaign-dn 4460).
SWIFT J1753.5-0127 (RA = 17h53m28s.3, Dec = -01d27m06s)
According to ATEL, Swift BAT detected a new gamma-ray source,
which may be a new black hole transient. It has a bright optical
counterpart of R~15.8 (vsnet-campaign-xray 343).
EP Car (RA = 10h28m23s.21, Dec = -58d57'58".6)
A possible superoutburst of EP Car was reported by R. Stubbings
(14.8mag; June 26.446, 15.1mag; June 27.436) (vsnet-campaign-dn 4449).
Z Cam (RA = 08h25m13s.2, Dec = +73d06'39")
According to E. Muyllaert, Z Cam is very faint (13.7mag; June
26.934). The systematic minimum brightness substantially varies,
but this level of faintness is rather rarely reached
(vsnet-campaign-dn 4450).
V344 Pav (RA = 19h16m10.21s, Dec = -62d35'54".4)
Observations by R. Stubbings showed a superoutburst of V344 Pav.
The outburst was first detected on June 24.399 at 14.8mag
(vsnet-campaign-dn 4452).
SN 2005cs (RA = 13h29m52s.85, Dec = +47d10'36".3)
SN 2005cs is located on the southern arm of "Whirlpool Galaxy"
M51. On the pre-discovery image, there is a bright star cluster
and H II region. It is possibly a gravitational-collapse of a
massive star, but the prompt spectral classification is urgently
needed, as well as the followup photometry (vsnet-campaign-sn 1013,
1017, 1020, 1022, 1023, 1024, 1026). The CfA team revealed that it
is indeed a young type II SN (vsnet-campaign-sn 1016).
Pre-discovery observations by P. Marek showed a rapid brightening of
the SN (vsnet-campaign-sn 1018).
NSV06278 (RA = 13h29m33s.71, Dec = +47d14'03".1)
While looking through the field of M51, T. Kato noticed the
presence of NSV06278, formerly classified as a possible nova.
Within positional errors, there is a ROSAT source possibly related
to this object (vsnet-campaign-sn 1025, vsnet-campaign-dn 4456).
3C454.3 (RA = 22h53m57s.74, Dec = +16d08'53".56)
The observation by Pavol A. Dubovsky on July 3.01 shows a possible
brightening of this quasar (14.1: mag; vsnet-campaign-blazar 330).
V Sge (RA = 20h20m14s.75, Dec = +21d06'09".0)
The observation by Pavol A. Dubovsky on July 2.908 shows that
V Sge is getting fainter (11.5mag; vsnet-campaign-nl 147).
(old targets)
V4641 Sgr (RA = 18h19m21s.58, Dec = -25d24'25".1)
B. Monard commented that an X-ray flare detected by HETE WXM
probably corresponds to a large optical flare on June 26
(vsnet-campaign-xray 323).
On June 27, observations by R. Stubbings showed a dramatic fading
to 13.4mag (vsnet-campaign-xray 315). The strong activity weakened
during this temporary fading phase (vsnet-campaign-xray 317, 318,
319). The light curve can generally be described with the quiescent
ellipsoidal modulation, although the object was slightly (~0.05mag)
brighter than the quiescent level (vsnet-campaign-xray 320).
A rebrightening was reported on June 28.360 by R. Stubbings
(12.3mag; vsnet-campaign-xray 321). He also detected strong
variations by visual observations (vsnet-campaign-xray 322).
T. Richards confirmed the flare by CCD observations
(vsnet-campaign-xray 324). T. Kato commented that the cycle of
fading/rebrightening was similar to that observed just before 1999
giant outburst (vsnet-campaign-xray 325, 326).
On 28 June, light curves can be described by a number of short and
flares (amplitude >0.5mag, duration <10min) on a fading trend
(vsnet-campaign-xray 327, 329, 330, 332, 333, 334).
Since June 29, the object has, in most times, kept magnitudes
slightly above the quiescent level, and apparently shown ellipsoidal
modulations. Such behavior is reminiscent of post-outburst active
phases observed in 2002 and 2004 outbursts (vsnet-campaign-xray 328,
331, 335, 336, 339, 349).
ASAS 160048-4846.2 (RA = 16h00m47s.43, Dec = -48d46'07".6)
After a rapid fading from the superoutburst, R. Stubbings reported
a rebrightening (14.3mag; June 27.428). T. Kato commented that the
rebrightening appeared a bit too early for an usual SU UMa-type
dwarf nova. A rebrightening following the "dip" in WZ Sge-type
stars tend to occur earlier (vsnet-campaign-dn 4448).
*** Future schedule ***
*** General information ***
SN 2005cs
David Bishop's page:
http://www.rochesterastronomy.org/supernova.html
[vsnet-campaign-sn 1015]
Supernovae Home Page by Jean-Claude PELLE:
http://www.astrosurf.com/snweb2/2005/05cs/05csHome.htm
[vsnet-campaign-sn 1021]
Images by P. Corelli:
http://xoomer.virgilio.it/mandi/supernovae/SN05cs/index.html
[vsnet-campaign-sn 1022]
Images by P. Marek (reported by L. Brat):
http://var.astro.cz/sn2005cs/sn2005cs.html
[vsnet-campaign-sn 1019]
Images by Y. Sano
http://www3.ocn.ne.jp/~sanosn/2005sn/2005cs-obs.html
[vsnet-campaign-sn 1023]
Images by D. Rodriguez
http://perso.wanadoo.es/d-rodrig/SN/SN05/SN2005cs-rzd.jpg
[vsnet-campaign-sn 1024]
NSV 24607
Charts presented by S. Otero:
http://ar.geocities.com/varsao/Carta_NSV_24607.htm
http://ar.geocities.com/varsao/Carta_NSV_24607_Busc.htm
[vsnet-campaign-symbio 101]
V391 Lyr: CCD observations by K. Nakajima, see
[vsnet-campaign-dn 4454]
(Recent astro-ph preprints)
4U 1700+24 = V934 Her
http://arXiv.org/abs/astro-ph/0506590
[vsnet-campaign-symbio 100]
AM CVn stars from the SDSS
http://arXiv.org/abs/astro-ph/0506730
[vsnet-campaign-dn 4455]
Eclipsing T Tau stars (V1642 Ori & V1174 Ori)
http://arXiv.org/abs/astro-ph/0506767
[vsnet-campaign-orion 99]
(Old articles)
V378 Ser spectrum on Apr. 4.80 (Fujii)
http://www1.harenet.ne.jp/~aikow/etc/asas174924-1300.0_20050404.gif
[vsnet-campaign-nova 1666]
V5115 Sgr spectrum at Bisei
http://www.bao.go.jp/astro/2005/nsgr2005/
[vsnet-campaign-nova 1667]
PYXnova2005
CCD Observation, see [vsnet-campaign-dn 4451]
Spectrum taken at Bisei:
http://www.bao.go.jp/astro/2005/dnpyx2005/
[vsnet-campaign-dn 4453]
V382 Nor (2005 March 19):
[vsnet-campaign-nova 1668, 1669, 1670, 1671]
delta Sco
Spectra by M. Fujii:
http://www1.harenet.ne.jp/~aikow/etc/delt_sco_20040827.gif
http://www1.harenet.ne.jp/~aikow/etc/delt_sco_20050221.gif
[vsnet-campaign-be 275]
V1118 Ori
outburst observations by K. Nakajima, see [vsnet-campaign-orion 98]
KV UMa
[vsnet-campaign-xray 337, 338, 340, 341, 342, 344, 345, 346, 347,
348]
V2361 Cyg
spectrum by M. Fujii:
http://www1.harenet.ne.jp/~aikow/v2361_cyg.gif
[vsnet-campaign-nova 1672]
CCD observations, [vsnet-campaign-nova 1673, 1674, 1675, 1676,
1677, 1679, 1680, 1681, 1682, 1683, 1684, 1685, 1686]
KS UMa
CCD observations, [vsnet-campaign-dn 4457]
PU CMa
CCD observations, [vsnet-campaign-dn 4458]
V1186 Sco
CCD observations, [vsnet-campaign-nova 1678]
SDSSJ155644.24-000950.2
CCD observations, [vsnet-campaign-dn 4461]
SN 2005ab
CCD observations, [vsnet-campaign-sn 1027]
(This summary can be cited.)
Regards,
Makoto Uemura
Hiroshima University
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