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[vsnet-campaign-news 176] News from VSNET
*** News from VSNET ***
The object discovered by W. Liller has been confirmed as a nova.
Another bright nova was discovered by K. Haseda also in Sagittarius.
For more detail information about these objects,
see below, "VSNET Weekly Campaign Summary" of the last week.
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VSNET (Variable Star Network) is an international variable star observing
network, covering various areas of novae, supernovae, cataclysmic variables
(CVs), X-ray transients, and other classical eruptive, pulsating, and
eclipsing variables. VSNET is one of invited contributing organizations
to the SkyPub AstroAlert system.
The "News from VSNET", mainly focusing on recent remarkable activities of
CVs and related systems, is issued on a weekly basis, except on occasions
of extremely urgent or transient events.
Please refer to the VSNET Home Page for more details of events and
objects listed.
VSNET Home Page: http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/
VSNET provides a number of mailing lists, on which various news and topics
are discussed. Subscriptions to the VSNET mailing lists are free of charge;
please refer to the instruction on the above page if a reader needs more
information of the list structure.
CCD observations of such targets are a relatively easy task for a 20-40cm
telescope; simply take as many CCD frames (with exposure times 10-30 sec)
as possible, spanning several hours per night. The only requirements are
the weather and your patience! If you need more help on the observing
technique, please feel free to ask on the vsnet-campaign list.
We would sincerely appreciate volunteers who would join the VSNET
Collaboration team to study the wonders of these exotic variable stars.
To join the VSNET campaign collaborative list, send an e-mail to
vsnet-adm@kusastro.kyoto-u.ac.jp (VSNET administrator)
with a line "SUBSCRIBE vsnet-campaign."
(VSNET campaign members are strongly recommended to subscribe to vsnet-alert
at the same time).
Regards,
Taichi Kato
On behalf of the VSNET administrator team
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The following was issued on September 23, 2002, as VSNET campaign
circulation 1340
[Note a large part of detailed information is posted to vsnet-campaign
sub-lists].
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
Nova Sgr 2002 No. 3 (RA = 19h01m09s.38, Dec = -22d00'06".2)
K. Haseda has detected a possible bright object (mag about 5.0) in
Sgr on an image taken on Setember 20 (vsnet-campaign-nova 1013).
The object was promptly confirmed at 5-6mag (vsnet-campaign-news
174, vsnet-campaign-nova 1014, 1015, 1021, 1022, 1025, 1026, 1035,
1039, 1041, 1053). Prediscovery observations show that it was faint
at least before September 8 (vsnet-campaign-nova 1017, 1046, 1048,
1050), and already bright on Sep. 18.465 (5.5p mag), 19.424 (5.5mag)
and 19.427 (4.9p mag) (vsnet-campaign-nova 1023, 1024, 1028, 1047).
At the position of the object, there is a known star (rmag=16.7 in
USNO_A2.0) in some catalogues (vsnet-campaign-nova 1018, 1019,
1036). T. Kato commented that the colors of the suggested quiescent
candidate are consistent with those of a little reddened quiescent
nova (vsnet-campaign-nova 1020). Spectroscopic confirmation, which
revealed the nova nature of this object, was independently done by
M. Fujii, D. West, and M. Gavin on September 21. The object showed
strong Balmer and Fe II emission lines. These observation
confirmed that the object is an Fe II-class nova shortly after
maximum (vsnet-campaign-nova 1030, 1031, 1032, 1037,
vsnet-campaign-news 175). D. West performed astrometry and reported
the above position (vsnet-campaign-nova 1033). A possible rapid
fading to 7.25mag was reported on September 23 (vsnet-campaign-nova
1063). The object is now at about 6.4mag (vsnet-campaign-nova 1045,
1043, 1049, 1054, 1057, 1062, 1064).
SN 2002fj (RA = 08h40m45s.10, Dec = -04d07'38".5)
SN 2002fj was discovered by L. A. G. Monard on images taken on
September 12 at 15.8mag. NGC 2642, a host galaxy of SN 2002fj, is a
barred-spiral galaxy in a dawn sky. SN is located at the east end
of the bar, and just south of a foreground star (mag 13). The
expected maximum for typical SN Ia is mag about 15.5. The reported
fast decline is quite exceptional for SNe, so follow-up photometry
and spectroscopy is very urged (vsnet-campaign-sn 475).
SN 2002fk (RA = 03h22m05s.71, Dec = -15d24'03".2)
A bright and rising supernova, SN 2002fk was discovered by Beijing
team (September 15.84 at 15.7mag, 17.79 at 14.5mag) and R. Kushida
(September 17.719 at 15.0mag) independently. If it is of type Ia,
it can become mag 14.1. The position of SN is about 12" west and 3"
south of the center of NGC 1309. NGC 1309 is a face-on spiral
galaxy. The reported magnitudes suggest that it is in a rising
phase (vsnet-campaign-sn 475, 476). The spectroscopic observation
at Bisei observatory revealed the SN Ia nature of SN 2002fk
(vsnet-campaign-sn 477). The object is brightening and now V=14.1
as reported by D. West (vsnet-campaign-sn 478).
Possible object(?) near Nova Sgr 2002 No.3
(RA = 18h55m14s, Dec = -21d50'00")
K. Geary found a possible another object near Nova Sgr 2002
No. 3 in an image taken on August 30 (vsnet-campaign-nova 1052).
No known minor planets brighter than V= 15.0 were within 45' from the
reported position at that time (vsnet-campaign-nova 1055). R. Shida
reported no new object brighter than 8mag is found in images taken
on September 2 (vsnet-campaign-nova 1056). D. West no new object
brighter than 15mag is found in images taken on September 23
(vsnet-campaign-nova 1061).
(continuous targets)
V4742 Sgr = Possible Nova Sgr 2002 (No.2)
(RA = 18h02m21s.864, Dec = -25d20'32".22)
C. Buil performed spectroscopy and reported H-alpha emission line
(FWHM=1100km) with a very deep P-Cygni profile, which indicates a
young nova (vsnet-campaign-nova 984). The spectrum taken by
M. Fujii on September 17 shows Balmer lines and Fe II series
emission lines, which indicates V4742 Sgr is an Fe II-class nova
(vsnet-campaign-nova 1007, 1008). W. Liller measured a position of
the nova, which shows that the nearby IRAS source is not the
quiescent counterpart (vsnet-campaign-nova 986, 987). At the
position reported by W. Liller, there is a GSC-2.2 star of 18.16 mag
(vsnet-campaign-nova 989, 990, 992). H. Yamaoka reported a position
through precise astrometry, which suggests that a GSC-2.2 star is
not a quiescent counterpart of the nova; no source can be seen on
every DSS images within 3" from the position (vsnet-campaign-nova
993, 1006). This finding makes a lower limit of the outburst
amplitude of ~12 (or possibly 13) mag. T. Kato commented that this
large outburst amplitude possibly qualifies this object as a fast
nova (vsnet-campaign-nova 994). D. West performed BVR photometry and
reported that the large B-V indicates the nova is highly reddened
(vsnet-campaign-nova 999). K. Haseda's photographic observations
show two predicovery negative observations on February and June
2002 (vsnet-campaign-nova 1003). The object is now at about 9.1mag
(vsnet-campaign-nova 991, 995, 996, 997, 998, 1000, 1001, 1004,
1005, 1009, 1010, 1012, 1039, 1040, 1044, 1051, 1058, 1060, 1054,
1064). Nova Sgr 2002 No. 2 discovered by W. Liller has been given
the above official permanent designation (V4742 Sgr) in IAUC 7972
(vsnet-campaign-nova 1002).
RX J0558.3+6735 (RA = 05h58m18s.0, Dec = +67d53'45")
T. Vanmunster reported large-amplitude modulations (0.4-0.5mag)
during a fading phase from the last outburst (vsnet-campaign-dn
2860). A. Oksanen performed time-series observations on September
21, and also reported a 0.4 mag humplike structure
(vsnet-campaign-dn 2866). J. Thorstensen performed spectroscopy and
determined the orbital period of 0.1504(3) d. Balmer emission lines
are relatively narrow for CVs in the spectrum of this object. The
spectrum showed the strong blue continuum of a novalike
(vsnet-campaign-dn 2861).
FT Cam (RA = 03h21m14s.39, Dec = +61d05'25".9)
An outburst to 14.8mag was reported on September 18 by
T. Kinnunen. This object has recently identified as a dwarf nova
below the period gap (vsnet-campaign-dn 2862). The Kyoto team
confirmed the outburst at ~16.0mag on September 19
(vsnet-campaign-dn 2865). The object has faded quickly
(vsnet-campaign-dn 2863, 2864, 2867).
MisV1147 (RA = 22h54m03s.78, Dec = +58d54'02".1)
The object again deeply faded (15.0mag on September 17). The last
deep fading was observed in 2002 Aug. 28-31 (vsnet-campaign-unknown
105).
*** Future schedule ***
IAU Colloquium 194
"Compact Binaries in the Galaxy and Beyond"
17-22 November 2003, La Paz, Mexico
Contact Details
Web page: http://bufadora.astrosen.unam.mx/~iau194
Email: iau194@astrosen.unam.mx
[vsnet-campaign-sn 467]
[vsnet-campaign-xray 154]
International Workshop
HIGH RESLUTION X-RAY SPECTROSCOPY with XMM-NEWTON and CHANDRA
24th and 25th October 2002
For more details, visit the workshop website:
http://vsnet.mssl.ucl.ac.uk/~gbr/rgs_workshop/
[vsnet-campaign-xray 152]
International Symposium: The Universe viewed in gamma-rays
--- Univ. Tokyo Workshop 2002 ---
September 25-28, 2002, Kashiwa, Chiba, Japan
http://icrhp9.icrr.u-tokyo.ac.jp/Symp2002.html
[vsnet-campaign-blazar 264]
[vsnet-campaign-blazar 265]
[vsnet-campaign-grb 7]
Texas in Tuscany
XXI Symposium on Relativistic Astrophysics
Florence, Italy, December 9-13, 2002
For more information:
http://vsnet.arcetri.astro.it/~texaflor/
[vsnet-campaign-xray 142]
NEW X-RAY RESULTS FROM CLUSTERS OF GALAXIES AND BLACK HOLES
34th COSPAR Scientific Assembly
10th to 12th October 2002 - Houston, Texas
For more information, visit the session website:
www.mssl.ucl.ac.uk/www_astro/cospar
[vsnet-campaign-xray 124]
[vsnet-campaign-agn 2]
[vsnet-campaign-xray 133]
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]
34TH COSPAR - GRB AFTERGLOW PHYSICS
HOUSTON, TX, USA, 10-19 OCTOBER 2002
Main Scientific Organizer (MSO):
Elena Pian - INAF, Astronomical Observatory of Trieste, Italy -
pian@ts.astro.it
http://vsnet.ts.astro.it/topics/topix.html
[vsnet-campaign-grb 1]
*** General information ***
Nova Sgr 2002 No. 3
Prediscovery photograph taken by T. Tanaka:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/Novae/nova_sgr02-3/tanaka.jpg
[vsnet-campaign-nova 1023]
Chart presented by R. Bouma:
http://vsnet.shopplaza.nl/astro/vs-charts/nova2002-3SGR.htm
[vsnet-campaign-nova 1027]
Chart presented by the AAVSO:
http://vsnet.aavso.org/cgi-bin/shrinkwrap.pl?path=/charts/SGR/N_SGR_02_3/NSGR02_3-B.JPG
[vsnet-campaign-nova 1034]
CCD image taken by D. West:
http://members.aol.com/dwest61506/page26.html
[vsnet-campaign-nova 1029]
Image taken by P. Martinez:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/Novae/nova_sgr02-3/2002nova02.jpg
[vsnet-campaign-nova 1063]
Spectrum taken by D. West:
http://members.aol.com/dwest61506/page27.html
[vsnet-campaign-nova 1031]
Spectrum taken by M. Gavin:
http://home.freeuk.com/m.gavin/nov2002.htm
[vsnet-campaign-nova 1037]
Spectrum taken by M. Fujii:
http://vsnet1.harenet.ne.jp/~aikow/nova_sgr_no3.gif
[vsnet-campaign-nova 1042]
Spectrum taken by C. Buil:
http://astrosurf.com/buil/us/nsgr3/nsgr3.htm
[vsnet-campaign-nova 1059]
WWW page of this nova made by M. Richmond:
http://spiff.rit.edu/classes/phys230/lectures/nova/nova.html
[vsnet-campaign-nova 1038]
V4742 Sgr
Spectrum taken by C. Buil:
http://astrosurf.com/buil/us/nsgr2/nsgr2.htm
[vsnet-campaign-nova 984]
[vsnet-campaign-nova 1011]
Spectrum taken by M. Fujii:
http://vsnet1.harenet.ne.jp/~aikow/v4742_sgr_20020917.gif
[vsnet-campaign-nova 1007]
Chart presented by R. Bouma:
http://vsnet.shopplaza.nl/astro/vs-charts/nova2002SGE.htm
[vsnet-campaign-nova 985]
CCD image taken by B. Monard:
http://vsnet.kusastro.kyoto-u.ac.jp/pub/vsnet/Novae/nova_sgr02-2/mon16.gif
[vsnet-campaign-nova 987]
Chart presented by the AAVSO:
http://charts.aavso.org/SGR/N_SGR_02_2/
[vsnet-campaign-nova 988]
Possible object near Nova Sgr 2002 No. 3
Image taken by D. West:
http://hometown.aol.com/dwest61506/page29.html
[vsnet-campaign-nova 1061]
Asteroid (40409)-1999 RS2 named "Taichikato" (by G. Masi)
[vsnet-campaign 1339]
http://vsnet.bellatrixobservatory.org/astei.html#1999rs2
(This summary can be cited.)
Regards,
Makoto Uemura
Return to Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
VSNET Home Page