[vsolj-alert 818] VSNET Weekly Campaign Summary

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

From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Oct  3 04:54 JST 2000
To: vsnet-campaign
cc: uemura
Date: Tue, 03 Oct 2000 04:54:22 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
X-Distribute: distribute [version 2.1 (Alpha) patchlevel=24]
Subject: [vsnet-campaign 523] VSNET Weekly Campaign Summary
Content-Type: text
Content-Length: 6921

VSNET Weekly Campaign Summary
 
*** Last week news ***

(new targets)
  IY UMa		(RA = 10h43m56s.87, Dec	= +58d07'32".5)	

    As reported by T. Kinnunen in [vsnet-alert 5291], the deeply eclipsing
  SU UMa-type dwarf nova IY UMa = TmzV85 is undergoing a bright outburst.
  The present outburst is far brighter (mv=13.0) than the January one 
  (vsnet-campaign 514).  M. Uemura confirmed the outburst and, from the 
  observation at Kyoto on September 29, reported the presence of a possible 
  eclipse and hump (vsnet-campaign 517).  T. Kato commented if the current 
  outburst of IY UMa is a genuine superoutburst, the supercycle would become 
  around 270 days (vsnet-campaign 519).  In J. Pieatz's observation, 
  an eclipse and a part of hump were detected (vsnet-campaign 520).  
  M. Moilanen, A. Oksanen, and J. Sorvari (Nylora team) reported 0.5mag 
  superhumps and 1.5mag eclipses from their observation on October 01 
  (vsnet-campaign 521).  The feature of eclipses and humps were not 
  dramatically changed on October 1 as reported by M. Uemura 
  (vsnet-campaign-dn 184).
    The current outburst is definitely a superoutburst.  Although the season 
  is not good for long observations, time-series photometry with short 
  exposure time is urgently needed for the new image of an accretion disk.
  

  SN 2000do		(RA = 19h11m26s.19, Dec = -50d38'24".5)

    H. Yamaoka forwarded the contents of IAUC 7500, which reports 
  the discovery of SN 2000do in the southern galaxy NGC 6754.  It is of 
  type Ia around maximum, and now at mag 15.6.  The position is about 6" 
  east and 8" north of the nucleus of the spiral (SAB(rs)bc) galaxy NGC 6754. 
  The spectrum of SN 2000do shows that it is of normal type Ia SN a
  few days after maximum.  The expected maximum of typical SN Ia is mag 14.9.  
    Further follow-ups including multicolor photometry are strongly urged.


  SY Vol		(RA = 08h53m28s.9, Dec = -71d12'29".9)

    The suspected dwarf nova SY Vol is now in outburst.  The outburst 
  magnitude of 14.4 was reported on September 29 by R. Stubbings 
  (vsnet-campaign-dn 176).
    To make clear the nature of the object, time-series observations 
  are encouraged.


  V632 Cyg		(RA = 21h35m54s.18, Dec +40d25'27".9)

    The dwarf nova V632 Cyg is reported to be in rare outburst.  The last 
  outburst reported to VSNET occurred in 1998 December - 1999 January.  
  The current magnitude is around 14.3 as reported by G. Hanson 
  (vsnet-campaign 522).   Follow-up observations are encouraged.


(continuous targets)
  SN 2000dk		(RA = 01h07m23s.52, Dec = +32d24'23".2)

    M. Moilanen performed multi-wavelength photometry on September 20/21 
  and reported B=15.95, V=15.94, and R=15.79 (vsnet-campaign-sn 96).


  V402 And		(RA = 00h11m07s.25, Dec = +33d32'36".1)

    The VSNET collaboration team received the second night run from J. Pietz. 
  Combined with all data by the Kyoto team until September 28, the superhump 
  period is calculated to be 0.06343 d (vsnet-campaign-dn 170).
  C. Kunjaya reported the observation on September 28, V=16.2, to VSNET 
  collaboration team (vsnet-campaign-dn 180).
    The superoutburst is still continues.  More observations are encouraged.


  3C 66A		(RA = 02h22m39s.6, Dec = +43d02'08")

    The object keeps the bright state.  The magnitude of 14.4 was reported
  by C. P. Jones on September 30 (vsnet-campaign-blazer 77).


  V452 Cas		(RA = 00h52m20s.87, Dec = +53d52'17".6)

    The superoutburst still continues.  The object has gradually faded 
  and reached 15.6mag on September 24 (M. Reszelski).  T. Kato reported 
  the object was still bright on September 27 (vsnet-campaign-dn 169).  
    Time-series observations are strongly encouraged.


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

    The outburst continues.  On September 29, it showed a gradual fading 
  to 14.1mag reported by R. Stubbings (vsnet-campaign-dn 177).


  V730 Sgr		(RA = 19h23m00s.94, Dec = -28d29'37".5)

    H. Yamaoka performed astrometry with Ouda image, and yielded the above 
  position.  It is well coincident with a USNO star (r=15.2, b=14.9), and 
  if this USNO star is the quiescent state of V730 Sgr, the amplitude
  is rather small (vsnet-campaign-dn 165).  T. Kato obtained a 40-min 
  time-series on September 25.  The light curve showed no detectable 
  variability (vsnet-campaign-dn 166).  The fading from the current 
  outburst was observed on September 28 (14.1mag by R. Stubbings) 
  (vsnet-campaign-dn 173).


  SN 2000dm	        (RA = 18h18m58s.97, Dec = +16d14'53".4)

    This supernova brightened in the last week.  The magnitude at discovery 
  date is 18.5 and an observation of 15.4mag on September 27 was reported 
  by F. M. Ewalt (vsnet-campaign-sn 98).


  BL Lac		(RA = 22h02m42.86s, Dec = +42d16'37.6")

    The striking activity continues in the last week.  The reported 
  magnitude is 14.5 - 13.7 (vsnet-campaign-blazer 75, 76).
    Close monitorings are encouraged.


  V803 Cen		(RA = 22h02m42.86s, Dec = +42d16'37.6")

    The bright state continues.  The current magnitude is around 13.5 
  (vsnet-campaign-dn 178).


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

    The fading from the outburst continues.  The object is now fainter than 
  15.0mag (vsnet-campaign-nl 2].


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

    The gradual fading and small plateau continued till last week were 
  interrupted by a surprising re-brightening; September 25.7, 2.03mag 
  (B. Fraser) and September 26, 2.06mag (S. Otero) (vsnet-campaign-be 61).  
  The brightening continues and the reported observations indicates it again 
  reaches 1.9mag (vsnet-campaign-be 62).
    Close monitorings and any kind of observations are strongly encouraged.


  PKS2005-489           (RA = 20h05m47s.4, -48d58'45".0)

    The brightening continues.  The current magnitude is around 12.5mag 
  (vsnet-campaign-blazer 74).


  PV Per		(RA = 02h42m43s.50, Dec = +38d07'44".4)

    The SU UMa-type dwarf nova PV Per was reported to be in outburst, 15.4mag, 
  on September 25 by T. Kinnunen.  T. Kato confirmed it was considerably 
  fainter on September 26 (vsnet-campaign-dn 163).  He additionally reported 
  the object has further faded through the observation on September 27 
  (vsnet-campaign-dn 168). 
    The outburst seems to be a normal one.


*** Future schedule ***

  EF Eri (HST observation)

    Researchers at Goettingen have a plan to observe this AM Her star 
  with HST in near future, and strongly want to know the current state 
  of this star.  D. Nogami provides the location (RA: 03h 14m 13.21s, 
  Dec: -22o 35' 42.7'' (J2000)) and the sequence 
  (http://ftp.nofs.navy.mil/pub/outgoing/aah/sequence/sumner/eferi.seq)
  in [vsnet-campaign 467].
    For more detailed information, please contact with D. Nogami 
  (daisaku@uni-sw.gwdg.de).


(This summary is reproduction free.)

Regards,
Makoto Uemura

VSNET Home Page

Return to Daisaku Nogami

---

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