[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]

[vsolj-alert 963] VSNET Weekly Campaign Summary



From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Nov 27 06:21 JST 2001
To: vsnet-campaign
Date: Tue, 27 Nov 2001 06:21:18 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
X-Distribute: distribute [version 2.1 (Alpha) patchlevel=24]
Subject: [vsnet-campaign 1233] VSNET Weekly Campaign Summary
Content-Type: text
Content-Length: 8701


VSNET Weekly Campaign Summary

*** Last week news ***

(new targets)
  GY Cnc		(RA = 09h09m50s.5, Dec = +18d49'47")

    J. Gunther and E. Morillon reported an outburst (12.0mag) of the 
  deeply eclipsing SS Cyg-type dwarf nova GY Cnc = RX J0909.8+1849
  = HS 0907+1902 on November 23 (vsnet-campaign 1230).  The Kyoto 
  team performed time-series photometry of eclipses on November 24
  (vsnet-campaign-dn 1946).  The eclipse minimum they detected was 
  observed on 24.6553 UT, about 8 min later than the prediction.  
  The depth was 1.6 mag (vsnet-campaign-dn 1947).  The outburst is 
  still ongoing (vsnet-campaign-dn 1952).

 
  KS UMa		(RA = 10h20m26s.54, Dec = +53d04'33".5)

    The SU UMa-type dwarf nova, KS UMa = SBS1017+533 is in outburst 
  as reported to be 14.0mag  by M. Simonsen on November 21 
  (vsnet-campaign-dn 1926).


  AQ Eri	        (RA = 05h06m12s.99, Dec = -04d08'01".6)

    M. Simonsen detected and reported an outburst of AQ Eri at 14.0mag 
  on November 22 (vsnet-campaign-dn 1929).  The observation by the 
  Kyoto team showed that the object was rapidly fading, indicating that 
  the outburst was a normal one (vsnet-campaign-dn 1930, 1944, 1950).  
  The brightness was still above quiescence on November 25 
  (vsnet-campaign-dn 1951).


  BZ Cam		(RA = 06h29m34s.49, Dec = +71d04'39".5)

    H. Itoh reports that VY Scl-type star BZ Cam has faded to 13.1mag.  
  T. Kato commented that if this indeed is an excursion to a low state, 
  this star seems to be quite active in recent years.


  SN 2001gb		(RA = 09h59m00s.96, Dec = +17d49'12".4)

    The LOTOSS team discovered SN 2001gb in the image taken on 
  November 20.  The host galaxy of SN 2001gb = IC 582 (spiral) makes 
  a pair with IC 583.  It superimposes on the outermost region of 
  the peculiar-shaped disk.  The expected maximum for typical SN Ia 
  is mag about 16.7.  The object was 16.8mag when discovered 
  (vsnet-campaign-sn 282).


  SN 2001gc		(RA = 05h55m26s.14, Dec = +51d54'34".2 )

    The LOTOSS team discovered SN 2001gc in the image taken on 
  November 21.  SN 2001gc locates about 9" east-southeast of the 
  nucleus of the host galaxy = UGC 3375 (SA(rs)c), superimposed on 
  the inner part of the disk.  The expected maximum for typical 
  SN Ia is mag about 16.1.  The object was reported to be 18.2mag 
  on November 18.2 and 16.2mag when it was discovered 
  (vsnet-campaign-sn 282).


  GX Cas		(RA = 00h49m01s.46, Dec = +56d52'44".8)

    The long-period SU UMa-type dwarf nova, GX Cas, is in outburst 
  as reported by H. Itoh on November 23.  The last superoutburst was 
  in 2001 June-July.  The present outburst, however, may be brighter 
  than some of past superoutbursts (13.5mag; vsnet-campaign-dn 1942).
  J. Ripero reported 13.9mag on November 24 (vsnet-campaign-dn 1949).

   
(continuous targets) 
  DM Dra		(RA = 15h34m12s.13, Dec = +59d48'31".9)

    The superoutburs continued until November 23 when the Kyoto 
  team detected the fading from the outburst (vsnet-campaign-dn 1919, 
  vsnet-campaign-dn 1922, 1928, 1932, 1939).  The Kyoto team 
  observations on November 14 and 19 yielded the revised superhump 
  period of 0.07572(4) d (vsnet-campaign-dn 1925).  Superhumps became 
  less apparent on Nov. 21-22, which is in agreement with our previous 
  finding during the late stage of the 2000 October superoutburst 
  (vsnet-campaign-dn 1948).


  SN 2001fz		(RA =  06h44m50s.26, Dec = -27d37'12".7)

    The CfA team has revealed that it is of type II (IAUC 7759).  
  H. Yamaoka reported that the recent magnitude estimates shows that 
  it has not become brighter than it was at discovery (unfiltered CCD 
  mag about 17.0) (vsnet-campaign-sn 283).


  TK5                   (RA = 19h17m26s.5, Dec = +37d10'41")

    A possible fading from the outburst was reported on November 19 
  (vsnet-campaign-dn 1923).


  EY Cyg		(RA = 19h54m36s.77, Dec = +32d21'54".7)
  
    The long outburst entered a rapid fading phase around November  
  19 (vsnet-campaign-dn 1920, 1933, 1945).

 
  TV Col		(RA = 05h29m25s.5, Dec = -32d49'05".2)

    The observations reported by B. Monard have recently show no 
  major outburst, but the object is still active (vsnet-campaign-ip 66) 
  

  CC Cnc		(RA = 08h36m19s.17, Dec = +21d21'05".4)

    The Kyoto data showed that CC Cnc has undergone a dramatic 
  decline between Nov. 21 and 22 (vsnet-campaign-dn 1931), which 
  was confirmed by visual observations (vsnet-campaign-dn 1934).


  AK Cnc		(RA = 08h55m21s.21, Dec = +11d18'14".7)

    The probable superoutburst continues.  M. Simonsen reported the 
  object was 14.6mag on November 21 (vsnet-campaign-dn 1918, 1927).


  KR Aur		(RA = 06h15m45s.05, Dec = +28d34'16".0)

    The bright state continues (vsnet-campaign-nl 53).


  1RXS J232953.9+062814 (RA = 23h29m54s.30, Dec = +06d28'10".9)

    After the re-breightening, the object experienced gradual declining 
  like as WZ Sge stars.  The light curve was dominated by double-wave 
  humps, with occasional brightenings (time scale ~1-2 hr), during which 
  humps tend to become rather unclear (vsnet-campaign-dn 1921).
  The later light curve on November 19 - 21 shows two periodicity 
  of 0.044590(16) d and 0.045935(67) d.  The former probably 
  corresponds to orbital periods, and the latter is superhumps 
  (vsnet-campaign-dn 1935).


  WZ Sge		(RA = 20h07m36s.53, Dec = +17d42'15".3)

    The gradual fading still continues (vsnet-campaign-dn 1917, 1936).
  I. Andronov et al. reported that they detected superhump signals 
  in the light curve on July 25 2001, the very early phase of the last 
  outburst (vsnet-campaign 1231, 1232).


  IX Dra		(RA = 18h12m32s.2, Dec = +67d04'41")

    The superoutburst continues (vsnet-campaign-dn 1916, 1924, 1937).


  V1039 Cen		(RA = 13h55m41s.27, Dec = -64d15'57".9)
	= Nova Cen 2001         

    The nova has been given the above GCVS designation in IAUC No. 7756.
  The nova was shown to be in nebular phase according to spectroscopy
  by Della Valle et al. on November 12 (vsnet-campaign-nova 655).
  The object rebrightened and experienced the third maximum reaching 
  11.8mag on November 22 (vsnet-campaign-nova 656).


  V1548 Aql		(RA = 19h07m28s.42, Dec = +11d44'45".8)

    The object again brighened with large fluctuations.  As reported 
  by M. Watanabe, the brightness reached V=13.15mag on November 20 
  (vsnet-campaign-nova 657).


  MV Lyr		(RA = 19h07m15s.93, Dec = +44d01'10".7)

    The object is gradally fading from the bright state of about 
  13.4mag (vsnet-campaign-nl 54).


  SU UMa		(RA = 08h12m28s.20, Dec = +62d36'22".6)

    The last normal outburst seems to trigger a superoutburst 
  (vsnet-campaign-dn 1938, 1943).


*** Future schedule ***

  V1494 Aql: Chandra X-ray observation
    08:12 November 28, 2001	03172	8.0	 CALIBRATIO	PKS2155-304
    10:53 November 28, 2001	02681	25.3	 STARRFIELD	V1494 AQL
    11:09 November 29, 2001	03412	20.0	 HARRISON  	FXRT011030
  Simultaneous observations are encouraged (vsnet-campaign-nova 658).
  also, see [vsnet-campaign-nova 659]


  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]


  Supernova campaign: A great opportunity for amateurs by M. Schwartz.
    For more detailed information, see [vsnet-campaign-sn 233]
    announce on the HST observations, see [vsnet-campaign-sn 240, 246]
 

  International Conference on Classical Nova Explosions
	 Sitges (Barcelona), Spain: 20-24 May 2002
    For more detailed information, see http://vsnet.ieec.fcr.es/novaconf
					[vsnet-campaign-nova 643]

  Blazar meeting at Tuorla: June 17-21, 2002
	for more information, see http://vsnet.astro.utu.fi/blazar02
					[vsnet-campaign-blazar 232]

 
*** General information ***
 
  GY Cnc
    Eclipse ephemeris, see [vsnet-campaign-dn 1940]
    also see, http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/j0909.html
				[vsnet-campaign-dn 1941]
  DM Dra
    superhump light curve:
	http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/DNe/DM_Dra/dmsh.gif
				[vsnet-campaign-dn 1948]

Corrigendum in the last Campaign Summary:

>  SN 2001fv            (RA = 11h04m01s.66, Dec = +28d01'55".7)
>
>    The CfA team revealed that SN 2001fv is of type Ia few weeks 
                                                ^^^^^^^^
                                                type II

(This summary can be cited.)	

Regards,
Makoto Uemura

VSNET Home Page

Return to Daisaku Nogami


vsnet-adm@kusastro.kyoto-u.ac.jp