[vsnet-campaign 806] VSNET Weekly Campaign Summary

[Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>]

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

(new targets)
  SN 2001X		(RA = 15h21m55s.46, Dec = +05d03'43".1)

    The Beijing team has discovered a bright SN in the barred-spiral
  galaxy NGC 5921.  The discovery was made on Feb. 27.8 (mag about 17.0).  
  It was confirmed by M. Schwartz's image on Mar 2.5 (3 days after 
  discovery) at mag 15.2.  It seems that this SN is caught in
  the very early phase.  The location is about 15" west and 32" south 
  of the nucleus of NGC 5921.  The spectrum of this object reveals 
  that it is of young type II.  A typical SN II on this galaxy is 
  expected to be bright as mag 15 at maximum, but the variety of the 
  maximum brightness among SNe II is extremely wide 
  (vsnet-campaign-sn 157, 158).

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

    According to T. Kinnunen, the northern eclipsing SU UMa-type 
  dwarf nova IY UMa (=TmzV85) is now in outburst (14.3mag on February 14.3).
  The magnitude implies it is a normal outburst (vsnet-campaign 804, 
  vsnet-campaign-dn 569).  


  V382 Vel		(RA = 10h44m48.4s, Dec = -52d25'31")

    A. Retter reported that CCD photometry carried out by M. Bos,
  J. McCormick and F. Velthuis during 4 nights in 2001 February-March 
  reveals that the light curve of V382 Vel (Nova Vel 1999) has 
  a periodic modulation with an amplitude of ~0.05mag and with 
  probable periodicity of ~3.5 h and ~4.1 h and ~4.9 h aliases 
  (vsnet-campaign-nova 262).


  EUVE J0854+390	(RA = 08h54m14s.2, Dec = +39d05'39".6)

    According to IBVS 5032, the following object is confirmed to 
  be a CV.  He I and He II are relatively strong, suggesting the 
  magnetic nature (vsnet-campaign 802).

   
(continuous targets)  
  V4643 Sgr		(RA = 17h54m40s.43, Dec = -26d14'15".7)
  (= Nova Sgr 2001)		

    IAUC 7591 tells that the nova has been given the permanent 
  designation, V4643 Sgr (vsnet-campaign-nova 255).  The nova was 
  extremely rapidly declining (vsnet-campaign-nova 245, 246, 247, 
  248, 251, 254, 256, 259), and then, the rate became moderate 
  in the early March (vsnet-campaign-nova 261).  The current 
  magnitude is about 11mag.  Y. Nakamura reported a prediscovery 
  observation that the object was fainter than 11.1 on February 20.852.  
  This indicates that the major rise of the  nova took place
  within a narrow period between Feb. 21 and 23 (vsnet-campaign-nova 252).
  The A. Tago's observation on February 22.860 which is 36 hours 
  earlier than Liller's discovery shows the object has already bright 
  at 9.8mag (vsnet-campaign-nova 257).
 

  SN 2001V		(RA = 11h57m24s.93, Dec = +25d12'09".0)

    The current magnitude is about 15mag (vsnet-campaign-sn 156).


  TU Men		(RA = 04h41m38s.10, Dec = -76d36'09".7)

    The moderate(?) outburst started fading as reported on February 26 
  (vsnet-campaign-dn 546, 552, 564).  The outburst seems to be terminated 
  (vsnet-campaign-dn 570).


  CP Dra		(RA = 10h15m39s.88, Dec = +73d26'05".4)

    The superoutburst is now ongoing (vsnet-campaign-dn 551, 559, 562, 565).  
  T. Vanmunster reported a superhump period of 0.08473day using 
  the data by the CBA team (vsnet-campaign 798, 800, 803).  
  M. Uemura also reported 0.08474day periodicity using the data by 
  the VSNET collaboration team (vsnet-campaign-dn 542, vsnet-campaign 799, 
  vsnet-campaign-dn 548).  He also reported the object was 0.2mag 
  brightening between February 24 (the first observation at Kyoto) and 
  25 (vsnet-campaign-dn 555).  R. Novak performed time-series photometry 
  on February 28, and the light curve and raw data ara available at 
  http://ada.astronomy.cz (vsnet-campaign-dn 549).  The current 
  magnitude is about 14.8mag.


  OI 090.4		(RA = 07h57m06s.6, Dec = 09d56'35")  

    The observation reported by S. O'Connor on February 27 implies 
  the object was slightly fading (vsnet-campaign-blazar 159).
  The current magnitude is V=15.9.


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

    The brightening continues (vsnet-campaign-nl 7).
  P. A. Dubovsky reported 14.0mag on February 27.769.


  TT Boo		(RA = 14h57m46s.46, Dec = +40d43'55".5)

    The superoutburst continues (vsnet-campaign-dn 554, 558, 566).
  The current magnitude is about 14.3mag.


  TV Crv		(RA = 12h20m23s.56, Dec = -18d27'02".7)

    M. Uemura reported the superhump period of 0.065024 day using 
  the data by the Kyoto team.  He also mentioned the gradual decline 
  is not monotonous (vsnet-campaign-dn 547).  S. Kiyota's data on 
  February 19 show short-term variations which probably attribute to 
  super-QPOs, as previously reported in the case of the Kyoto observation.  
  The object was gradually fading from February 20 with a rate of 
  ~0.15mag/day until February 24 when the rate became very slow 
  (vsnet-campaign-dn 560).  The superoutburst continued until 
  March 4 when M. Uemura reported it entered a rapid decline phase 
  (vsnet-campaign-dn 543, 550, 563, 572).


  U Gem			(RA = 07h55m05s.55, Dec = +22d00'09".2)

    The slightly active state still continues (vsnet-campaign-dn 544, 
  557, 568).


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

    The observations reported on the end of February show the 
  object was slightly fainter (~10.2mag; vsnet-campaign-nova 249).  
  A brightening was reported on February 28 - March 2 (~9.8mag; 
  vsnet-campaign-nova 253).  The object again fading to 10.1mag 
  on March 3 (vsnet-campaign-nova 258).

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

    The object is still bright (vsnet-campaign-be 91, 92).


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

    The oscillating state continues (vsnet-campaign-dn 561, 567, 571).


  MKN 421		(RA = 11h04m27s, Dec = +38d12'32")

    The outburst continues (vsnet-campaign-blazar 158, 161, 163, 164, 
  vsnet-campaign-nova 260).  The current magnitude is about 12.5mag.


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

    The fading continues (vsnet-campaign-blazar 160).
  The current magnitude is about 14.7.


  OJ 287            (RA = 08h51m57s, Dec = 20d17'59")

    Observations reported during the last week indicate this blazar 
  was slightly faded (vsnet-campaign-blazar 162).


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

    Recent observations have shown no outburst during the latter 
  half of February (vsnet-campaign-ip 44), while the outburst 
  duration is known to be very short, and A. Retter noticed it is 
  very likely that outbursts may have been missed (vsnet-campaign-ip 45). 


*** Future schedule ***

  RZ LMi campaign conducted by J. Patterson on April 2001

    For more information, see [vsnet-campaign 718, vsnet-campaign-dn 429].


  MAXI workshop on AGN Variability
              March 10-11, 2001,  Nikko, Japan, Organized by RIKEN & NASDA

    For more information, see [vsnet-campaign-blazar 144]


*** General information ***

  U Gem
    Eclipse ephemeris, see [vsnet-campaign-dn 545].

  IY UMa
    Eclipse ephemeris, see [vsnet-campaign 805]

  CP Dra 
    Light curve presented by R. Novak
	http://ada.astronomy.cz
		[vsnet-campaign-dn 549]


(This summary can be cited.)

Regards,
Makoto Uemura

VSNET Home Page

---

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

VSNET Home Page

Return to Daisaku Nogami

---

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