[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]
[vsnet-campaign 1114] VSNET Weekly Campaign Summary
VSNET Weekly Campaign Summary
*** Last week news ***
(new targets)
Nova Cyg 2002 No. 2 (RA = 21h03m02s.00, Dec = +48d45'52".9)
A. Tago discovered a new nova in Cygnus on August 18. K. Ayani
performed spectroscopy and confirmed its nova nature in an early
phase. The magnitude was 8.8mag when it was discovered and
then, the object brightened to 6.6mag (vsnet-campaign-nova 431).
P. Schmeer reported that there is r=18.8mag USNO star within
1" of the position of the nova (vsnet-campaign-nova 432).
It is currently in 6-7th mag (vsnet-campaign-nova 434, 436, 439).
A. Takao reported it was still faint on August 17
(vsnet-campaign-nova 437, 438).
V893 Sco (RA = 16h14m45s.26, Dec = -28d39'30".3)
According to B. Monard, the eclipsing dwarf nova V893 Sco
experienced an outburst on August 14 at 12.6mag (vsnet-campaign-dn
1242, 1244). It seems to be a normal outburst (vsnet-campaign-dn
1273).
SN 2001dp (RA = 11h53m45s.22, Dec = +52d20'56".8)
The members of the CROSS program have discovered the quite
bright SN (mag 14.5) on August 12. Y. Sano confirmed this SN
(vsnet-campaign-sn 215). K. Ayani performed spectroscopy and
reported it resembles the spectrum of tyle Ia one month after the
peak (vsnet-campaign-sn 216). The position is about 35" west and
80" north of the nucleus of the barred-spiral (SB(r)bc) galaxy
NGC 3953. NGC 3953 is nearby galaxy, the expected maximum of the
typical SN Ia is mag 12.5 (vsnet-campaign-sn 219, 220, 221, 222).
TK5 (RA = 19h17m26s.5, Dec = +37d10'41")
As reported by M. Reszelski, the object experienced an outburst
at 14.8mag on August 16 (vsnet-campaign-dn 1253).
SN 2001dn (RA = 01h44m35s.32, Dec = +37d41'49".7)
SN 2001dn was discovered by T. Boles on August 14 at 15.5mag.
The position is 4" west and 3" north from the nucleus of NGC 662.
The expected maximum of the typical SN Ia is around mag 15.7
(vsnet-campaign-sn 217).
SN 2001do (RA = 19h37m23s.02, Dec = +40d42'24".3)
SN 2001do was discovered by the KAIT team on August 14 at
16.2mag. A previous KAIT image taken on Aug 10.2 did not show this
object, so it would be fresh object. The position is about 5" east
and 4" north of the nucleus of the open spiral (Sd) galaxy UGC
11459. The recession velocity of UGC 11459 is about 3100 km/s,
so the expected maximum of typical SN Ia is around mag 15.5 after
the correction of the Galactic extinction (vsnet-campaign-sn 218).
(continuous targets)
WZ Sge (RA = 20h07m36s.53, Dec = +17d42'15".3)
The historical event is still ongoing and the international
campaign of observations is also active (vsnet-campaign-dn 1195,
1197, 1199, 1208, 1211, 1214, 1215, 1216, 1220, 1227, 1228, 1231,
1234, 1235, 1245, 1246, 1247, 1248, 1254, 1257, 1259, 1262, 1264,
1274, 1275, 1278, 1280, 1282, 1283, 1285, 1287, 1288, 1289, 1290,
1293, 1296, 1298, 1299, 1301, 1304).
On August 12, the fading was relatively rapid (vsnet-campaign-dn
1198, 1204). Eclipses seem to locate at the top of superhumps and
looks very shallow (vsnet-campagn-dn 1207, 1210, 1213). Some
flickerings were observed after the peak of superhumps
(vsnet-campaign-dn 1200). The amplitude of superhumps was about
0.15mag (vsnet-campaign-dn 1203).
On August 13, superhump profiles became somewhat complicate and
a secondary maximum can be seen (vsnet-campaign-dn 1217). The
flickerings or QPOs were still seen on the declining branch
(vsnet-campaign-dn 1222). Eclipses located just on the ascending
branch of superhumps and became more evident (vsnet-campaign-dn 1223).
On August 14, the eclipses became deeper and more evident
(vsnet-campaign-dn 1229, 1232). The hump maxima was not clear
and showed complicate feature including two maxima, so called
"M"-shaped profile (vsnet-campaign-dn 1233, 1240, 1251). The fading
was almost stopped (vsnet-campaign-dn 1241).
On August 15, the first peak was observed to move closer to the
second one (vsnet-campaign-dn 1249), and then, made a main peak. A
dip around the orbital phase 0.6 was observed (vsnet-campaign-dn
1250). Eclipses became deeper and sharper. There were some small
peaks as well as the main peak (vsnet-campaign-dn 1252, 1261).
On August 16, sharp eclipses were again emerging
(vsnet-campaign-dn 1270, 1269, vsnet-campaign 1100). The decline
speed became faster again (vsnet-campaign 1099, 1101).
On August 17, the object entered a rapid decline phase. During
this phase the humps once became small (vsnet-campaign 1103, 1104,
1105) and faded with a rate of about 1 mag/d (vsnet-campaign-dn 1276,
1277). Eclipses and short time-scale modulations were observed.
In the late phase, new humps were evolving at the orbital
phase of 0.35-0.4 (vsnet-campaign 1106, 1107) and the decline
speed became slower (vsnet-campaign-dn 1281).
On August 18, another large humps were evolved and the fading
trend almost stopped (vsnet-campaign 1110). The phase is
different from that of August 17, so they are of diffenrent nature.
(vsnet-campaign-dn 1286, vsnet-campaign 1108). The amplitude
of humps became about 0.35mag and the period is that of superhumps
(vsnet-campaign 1109, 1111). Eclipses were also observed
(vsnet-campaign-dn 1294).
On August 19, the object started re-brightening (vsnet-campaign
1112). The depth of eclipses became deep (0.15mag)
(vsnet-campaign 1113). The amplitude of humps was still large
(0.45mag) (vsnet-campaign-dn 1302, 1303).
T.Kato has re-examined the original data during the last 1978
superoutburst and reported the superhump period of 0.05722d, 1%
longer than orbital one (vsnet-campaign-dn 1224). The excess
is the same as in the case of AL Com (vsnet-campaign-dn 1225).
T. Marsh commented that it is also important to observe even after
the outburst terminated because an elliptical disk may remain
(vsnet-campaign 1097, 1098). D. West's time-series data on August
15/16 is available at [vsnet-campaign-dn 1266]. S. Kiyota's
time-series data on August 16 and 17 is available at [vsnet-campaign-dn
1272] and [vsnet-campaign-data 74], respectively
(ref. vsnet-campaign-dn 1271). M. Moriyama's time-series
data on August 17 is available at [vsnet-campaign-data 73].
Period analysis of superhumps were performed by some observers
and they reported the preliminary results: 0.05774d (G. Masi;
Aug. 13; vsnet-campaign-dn 1201, 1202), 0.057198(10)d (T. Kato;
Aug. 13; vsnet-campaign-dn 1206), 0.05728d (G. Masi; Aug. 14;
vsnet-campaign-dn 1217), 0.057191(8)d (T. Kato; Aug. 14;
vsnet-campaign-dn 1222), 0.0571907(73)d (T. Kato; Aug. 15;
vsnet-campaign-dn 1233), 0.05704(15)d (M. Uemura; Aug. 19;
vsnet-campaign 1111).
OY Car (RA = 10h06m22s.46, Dec = -70d14'04".4)
The superoutburst is still ongoing (vsnet-campaign-dn 1219).
RZ Sge (RA = 20h03m18s.49, Dec = +17d02'52".6)
The outburst was suggested to be a possible superoutburst
(vsnet-campaign-dn 1209). P. Schmeer commented it seems to be a
normal outburst (vsnet-campaign-dn 1218). M. Simonsen reported his
observations and confirmed it was a normal one (vsnet-campaign-dn 1226).
V1008 Her (RA = 18h05m46s.31, Dec = +31d40'18".1)
The outburst is still ongoing (vsnet-campaign-dn 1230, 1255, 1292).
IX Dra (RA = 18h12m32s.2, Dec = +67d04'41")
An outburst (16.5mag) was reported by M. Reszelski on August 15
(vsnet-campaign-dn 1256).
V803 Cen (RA = 13h23m44.5s, Dec = -41d44'30".1)
An outburst was reported on August 12 by B. Monard at 13.7mag
(vsnet-campaign-dn 1221). Another outburst was reported on
August 17 by S. Kerr at 13.0mag (vsnet-campaign-dn 1300).
V818 Sco (RA = 16h19m55s.07, Dec = -15d38'24".5)
As reported by B. Monard on August 14 (11.9mag), the object
is now showing strong activity (vsnet-campaign-xray 80).
V503 Cyg (RA = 20h27m15s.61, Dec = +43d41'45".5)
The superoutburst is still ongoing (vsnet-campaign-dn 1258, 1291).
V445 Pup (RA = 07h37m56s.88, Dec = -25d56'59".1)
B. Monard reported the object was fainter than 14.6mag on August
18. The object is now fainter than the prenova magnitude
(vsnet-campaign-nova 435).
*** Future schedule ***
WZ Sge campaign
D. Steeghs wrote:
"Several of us are organizing a campaign on the current outburst
of WZ Sge, using a large variety of ground based facilities as well as
space observatories. A web-page has been setup listing the scheduled
observations so far which we intend to keep up to date at:
http://vsnet.astro.soton.ac.uk/~ds/wzsge.html
"
For more information, see [vsnet-campaign 1039]
V446 Her campaign until September
conducted by Matthias Schreiber, Boris Gaensicke, and Daisaku Nogami
For more detailed information, see [vsnet-campaign-dn 918],
[vsnet-campaign-nova 349], or [vsnet-campaign 983]
Two Years of Science with Chandra *
* This meeting will also be the 12th Annual Maryland Astrophysics
Conference
September 5-7, 2001
For more information, see [vsnet-campaign-xray 66]
*** General information ***
Nova Cyg 2001 No. 2
spectrum taken by K. Ayani
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Novae/ncyg01-2.html
[vsnet-campaign-nova 433]
WZ Sge
chat for WZ Sge news presented by G. Masi
http://vsnet.eurolink.it/comets/astrochat.html
[vsnet-campaign-dn 1196]
web page by G. Masi
http://vsnet.eurolink.it/comets/wzsge.htm
[vsnet-campaign-dn 1203, 1213,
1217, 1240, 1260 ]
nightly averaged magnitude presented by T. Kato
see, [vsnet-campaign-dn 1205, 1237, 1251, 1279, vsnet-campaign 1102]
time-series photometry by M. Richmond
http://spiff.rit.edu/richmond/ritobs/wzsge.html
http://spiff.rit.edu/richmond/ritobs/aug12_2001/wzsge_aug12ut.dat
[vsnet-campaign-dn 1212]
http://spiff.rit.edu/richmond/ritobs/aug15_2001/aug15_2001.html
http://spiff.rit.edu/richmond/ritobs/aug15_2001/wzsge_aug15ut.dat
[vsnet-campaign-dn 1247]
http://spiff.rit.edu/richmond/ritobs/aug16_2001/wzsge_aug16ut.dat
[vsnet-campaign-dn 1267]
VSNET web page:
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/wzsge01.html
[vsnet-campaign-dn 1236]
eclipse ephemeris, see [vsnet-campaign-dn 1243]
U-band light curve by A. Henden;
http://ftp.nofs.navy.mil/pub/outgoing/aah/phot/wzsgeuc.gif
[vsnet-campaign-dn 1263]
http://ftp.nofs.navy.mil/pub/outgoing/aah/phot/wzsgeud.gif
[vsnet-campaign-dn 1268]
http://ftp.nofs.navy.mil/pub/outgoing/aah/phot/wzsgeuf.gif
[vsnet-campaign-dn 1284]
http://ftp.nofs.navy.mil/pub/outgoing/aah/phot/wzsgeug.gif
[vsnet-campaign-dn 1295]
Light curve by L. Cook:
http://vsnet.geocities.com/lcoo/wzsge.htm
[vsnet-campaign-dn 1297]
V893 Sco
eclipse ephemeris, see [vsnet-campaign-dn 1242]
SN 2001dp
spectrum taken at Bisei Astronomical Observatory
http://vsnet.town.bisei.okayama.jp/bao/astro/sn/poss_sn_n3953.gif.
[vsnet-campaign-sn 216]
BL Lac
WEBT BL Lac campaign 2001 was closed (vsnet-campaign-blazar 221).
(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