[vsolj-alert 896] VSNET Weekly Campaign Summary

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Jun  5 03:09 JST 2001
To: vsnet-campaign
Date: Tue, 05 Jun 2001 03:09:51 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
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Subject: [vsnet-campaign 961] VSNET Weekly Campaign Summary
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VSNET Weekly Campaign Summary
 
*** Last week news ***

(new targets) 
  SN 2001cj		(RA = 13h21m44s.85, Dec = +31d14'48".6)

    SN 2001cj was discovered by the KAIT team and confirmed on 
  May 30.3 UT and 31.3 UT, when SN was mag about 15.9 and 15.7.  
  The position is about 7" west and 35" north of the nucleus of 
  a barred-spiral galaxy UGC 8399.  The spectrum of this SN 
  indicates that it is of type Ia before optical maximum.  
  Interestringly, this galaxy is included by the famous "fan-shaped
  figure" of the CfA redshift survey, and is one of the member of 
  the "human-shaped" region.  From the CfA survey, it is suggested 
  that UGC 8399 is a member of the "group 81" whose mean v_r is 
  about 7200 km/s.  The expected maximum of typical SN Ia is around 
  mag 16.5, which is far dimmer than one at discovery.  Meanwhile, 
  the "group 82" (v_r = 5100 km/s) lies foreground of group 81.  
  If the distance of SN 2001cj corresponds to the recession velocity 
  of group 82, the expected maximum is mag about 15.7.  It is quite 
  important to determine whether SN 2001cj is intrinsically bright 
  (slow decliner) or is normal one.  It can probe the true distance 
  of the group 81 (vsnet-campaign-sn 205).  


  SBS 1017+533		(RA = 10h20m26s.65, Dec = +53d04'32".6)

    As reported by G. Poyner, the SU UMa-type dwarf nova SBS 1017+533
  is undergoing a superoutburst.  The last superoutburst was 
  reported in 2000 September-October, which was not well observed 
  because of the poor location in the sky.  The current outburst 
  seems to provide an excellent opportunity to study this dwarf nova 
  in detail (vsnet-campaign 947).  The superoutburst still continues 
  (vsnet-campaign-dn 861, 864).


  (SN) 2001bn		(RA = 14h30m39s.53, Dec = -02d06'00".6)

    According to IAUC 7624, a supernova candidate SN 2001bn was 
  discovered by the QUEST collaboration.  IAUC 7640 tells that 
  spectroscopy revealed strong narrow Balmer absorption lines at 
  z=0, and concluded it is a Galactic blue variable 
  (vsnet-campaign-dn 871, vsnet-campaign 958).


  KN Gem		(RA = 06h35m52s.26, Dec = +26d53'24".4)

    According to IBVS 5083 (Samus), the GCVS element of KN Gem actually
  referred to that of BR Gem.  KN Gem thus remains a suspected dwarf 
  nova, as originally reported.  A vigorous search for possible future 
  outbursts (brightenings) is very encouraged (vsnet-campaign 956).

 
  HadV89		(RA = 18h15m27s.0, Dec = -18d57'21")

    K. Haseda reported a new variable star, HadV89.  T. Kato noticed  
  that the star may be some sort of an eruptive variable since no 
  apparent star exists on its position first reported 
  (vsnet-campaign 952, vsnet-campaign-nova 333).  The revised 
  position however indicates the object is identified with a red 
  object.  The object is most likely a Mira-type variable, not a nova 
  (vsnet-campaign 953, vsnet-campaign-nova 334).  B. Skiff suggests 
  it is an object in MSX catalogue (vsnet-campaign-nova 335, 
  vsnet-campaign 954).


(continuous targets) 
  V551 Sgr		(RA = 18h00m56s.46, Dec = -34d35'45".6)

    The outburst is still ongoing (vsnet-campaign-dn 849, 865).


  StHa-164		(RA = 19h26m01s, Dec = -06d09'53")

    A. Henden reported a misprint in their paper that the magnitudes 
  from his three night of photometry is V=14.47, not B=14.47 
  (vsnet-campaign 945).


  V893 Sco		(RA = 16h14m45s.26, Dec = -28d39'30".3)

    The outburst was terminated (vsnet-campaign-dn 853).


  HS Vir		(RA = 13h43m38s.5, Dec = -08d14'04".1)

    The superoutburst continues (vsnet-campaign-dn 848,850,860,867).
  The data taken by S. Kiyota on May 29 is available in 
  [vsnet-campaign-data 65].


  V660 Her		(RA = 17h42m07s.3, Dec = +23d47'37".3)

    The fading from the outburst was reported by M. Uemura on May 30 
  (vsnet-campaign-dn 854,857), and then, the object re-brightened to 
  14.4mag on May 31 as reported by C. P. Jones.  The short outburst 
  should have been a precursor to superoutburst(vsnet-campaign 955).
  M. Uemura confirmed the outburst and performed time-series observation 
  on Jun 1 (vsnet-campaign-dn 870).  J.Pietz reported his past 
  observations and suggests the supercycle of about 1 year and  
  the cycle of normal outbursts of about 60 days (vsnet-campaign 960).
  

  BF Ara		(RA = 17h38m10s.40, Dec = -47d10'43".4)

    As reported by A. Peace on May 27, BF Ara showed a bright (14.3mag) 
  outburst (vsnet-campaign 948).  The fading from the outburst was 
  reported on May 31 by R. Stubbings (vsnet-campaign-dn 868).


  V1548 Aql		(RA = 19h07m28s.42, Dec = +11d44'45".8)
    (= Nova Aql 2001)		

    The current magnitude is about 14.2mag and on the gradual 
  declining (vsnet-campaign-nova 330, 337).  The GCVS designation has 
  been given the nova as V1548 Aql (vsnet-campaign-nova 336).

 
  AL Com		(RA = 12h32m25s.90, Dec = +14d20'42".5)
  
    The superoutburst is still ongoing (vsnet-campaign-dn 847,852,
  859,866,872,875).  The data on May 26 still shows early superhumps 
  with small amplitude (vsnet-campaign-dn 862).  The data on May 28 
  at Kyoto clearly show the evolution of normal superhumps 
  (vsnet-campaign 946).  R. Ishioka reported that period analysis 
  yields 0.0581d, 2.6% larger than the orbital period using May 27 
  and 28 data (vsnet-campaign-dn 855, 856).  G. W. Billings' data on 
  May 30 shows superhumps with an amplitude of 0.26mag 
  (vsnet-campaign-dn 869).


  MM Hya		(RA = 09h14m13s.97, Dec = -06d47'45".0)

    The superoutburst continued until around June 3 when R. Ishioka 
  found it has been fainter than 17.0mag (vsnet-campaign-dn 851, 874).


  V503 Cyg		(RA = 20h27m15s.61, Dec = +43d41'45".5)

    The superoutburst was terminated around May 30 (vsnet-campaign-dn 873).


  V803 Cen		(RA = 13h23m44.5s, Dec = -41d44'30".1)

    The helium dwarf nova V803 Cen has faded from the recent 
  "standstill" at around 13mag (vsnet-campaign 949).


  3C 279		(RA = 12h56m11s.1, Dec = -05d47'20")

    The object is still very active (vsnet-campaign-blazar 200).


  V445 Pup		(RA = 07h37m56s.88, Dec = -25d56'59".1)

    It remains around 10.6mag (vsnet-campaign-nova 331, 332).


  Delta Sco		(RA = 16h00m19s.9, Dec = -22d37'17")

    The bright state continues (vsnet-campaign-be 132).


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

    Outbursts wer reported by P. A. Dubovsky on May 25 at 15.0mag
  (vsnet-campaign-dn 858) and by M. Reszelski on May 30 at 15.1mag 
  (vsnet-campaign-dn 863).


  WR106

    K.Takamizawa provided the data on WR106 since 1994 February 
  (vsnet-campaign-data 64).  According to his and K. Haseda's data, 
  One fading season is observed in early 2000 (vsnet-campaign 951).
 

*** Future schedule ***

  Elizabeth and Frederick White Workshop
    AGN variability across the Electromagnetic Spectrum
      25 - 29 June 2001 Sydney, Australia

    For more information, see [vsnet-campaign-blazar 168].


  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 ***

  AL Com
    VSNET page for the current superoutburst:
    http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/alcom0105.html
				[vsnet-campaign 950, 959]

  V1159 Ori
    The preprint of "Changing Supercycle of the ER UMa-Type Star V1159 Ori"
    by T. Kato is available from:
    http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/preprints/V1159_Ori-cycle/
    or [vsnet-preprint 31]
				[vsnet-campaign 957]


(This summary can be cited.)

Regards,
Makoto Uemura

VSNET Home Page

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