[vsolj-alert 821] VSNET Weekly Campaign Summary

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

From owner-vsnet-campaign@kusastro.kyoto-u.ac.jp Tue Oct 24 08:02 JST 2000
To: vsnet-campaign
Date: Tue, 24 Oct 2000 08:01:58 +0900
From: Makoto Uemura <uemura@kusastro.kyoto-u.ac.jp>
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Subject: [vsnet-campaign 536] VSNET Weekly Campaign Summary
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VSNET Weekly Campaign Summary
 
*** Last week news ***

(new targets)
  V544 Her		(RA = 16h38m03s.20, Dec = +08d37'04".2)

    As reported by P. Schmeer, an outburst of V544 Her was detected, 
  and then, confirmed by T. Vanmunster on October 17, and M. Uemura and 
  T. Kato on October 18 [vsnet-alert 5327, 5328, vsnet-campaign-dn 200, 202, 
  and 205].  At the peak on October 17, the magnitude was about 16 
  (vsnet-campaign-dn 205).

  
  CH Her		(RA = 18h34m46s.21, Dec = +24d47'57".0)

    M. Uemura and T. Kato confirmed an outburst of CH Her which was reported 
  by G. Hanson on October 18.  The magnitude was about R=14.8 
  (vsnet-campaign-dn 201).


  KZ Gem		(RA = 06h52m59s.26, Dec = +16d40'16".4)

    Following a notification by P. Schmeer, M. Uemura and T. Kato confirmed 
  an outburst of KZ Gem on October 18.  The R-magnitude was about 14.2 
  (vsnet-campaign-dn 204).  During the run by them, no variation with an 
  amplitude over 0.1mag was not seen (vsnet-campaign-dn 204).


  HD 5980		(RA = 00h59m26s.5, Dec = -72d09'54")

    Rapid fading of this object was detected from observations by A. Pearce 
  (vsnet-sdor 9).  The magnitude reached 11.4 on October 17.  About this 
  fading, T. Kato forwarded a message from Dr. Koenigsberger in 
  [vsnet-campaign 532].  According to it, the fading phase correspond to the 
  orbital phases between 0.2 and 0.4 (P=19.266) which coincide with the 
  eclipse of Star A (the LBV/eruptor) by Star B (presumably the original WR 
  star), although a drop by 0.7mag does seem a LARGE drop for visual 
  magnitudes. 


  RX J0909.8+1849	(RA = 09h09m50s.5, Dec = +18d49'47")

    P. Schmeer reported an outburst of this eclipsing dwarf nova 
  on October 17 at the magnitude of 13.5 (vsnet-campaign-dn 206).


  AB Dra		(RA = 19h49m06s.37, Dec = +77d44'43".1)

    T. Kato commented from the last week observations that the short-period 
  Z Cam star AB Dra may be entering a standstill on October 20 
  (vsnet-campaign 533).  He also reported an outburst on October 20 and it 
  is not a true standstill, but a bright minimum before the outburst 
  (vsnet-campaign-dn 207).


  IP Peg		(RA = 23h23m09s.07, Dec = +18d25'10".4)

    An outburst of an eclipsing dwarf nova, IP Peg was reported on 
  October 22 (vsnet-outburst 782).

  
(continuous targets)
  Delta Vel		(RA = 08h44m42s.1, Dec = -54d42'30")

    S. Otero reported some observations on Delta Vel; according to 
  D. Overbeek, no eclipse was seen between JD 2451832.5486 and 2451832.6250. 
  R. Salvo seems to have noticed a possible dimming between JD 2451832.7251 
  and 2451832.8333. Paul D Fieseler informed to S. Otero that another fading 
  was recorded by Galileo's star scanner in 1989 (JD 2447850.3 - 2447851.0).
  This fading doesn't fit with the ephemeris unless the period is decreasing 
  at a fast rate.  However this trend seems not to be present in the last 
  eclipses.  With the Galileo's data, S. Otero and C. Lloyd suggested that 
  the dimmer point observed by Hipparcos is not a real eclipse but an 
  observation with large dispersion.  They furthermore found a period of 
  45.16 days and both primary and secondary eclipses are obserbed 
  (vsnet-deltavel 3, 4, 5).
    The ecipse ephemeris predicts the next primary eclipse will occur 
  on November 1 22:22 (UT) and the next secondary eclipse will occur 
  on November 21 19:18 (UT) (vsnet-campaign-deltavel 4).  The observations 
  are strongly encouraged.

	
  CI Aql		(RA = 18h52m03.6s, Dec = -01d28m38.9s)

    The last week observation reported to VSNET shows steeper fading 
  of CI Aql.  The object currently seems to be about 14mag 
  (vsnet-campaign-nova 85).  


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

    BL Lac continues its large amplitude and rapid activity.  The observations 
  of 13.7 - 14.5 during the last night were reported to VSNET
  (vsnet-campaign-blazer 82, 83).  


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

    A brightening of this blazer was reported in the end of September, and 
  then, the object was dimmer until another brightening was reported in 
  last week.  On October 19, C. P. Jones reported the magniutde of 14.5  
  (vsnet-campaign-blazer 84). 

    
  SN 2000cx		(RA = 01h24m46s.15, Dec = +09o30'30".9)

    The fading continues.  The current magnitude is about 17.2 (on October 19 
  observation by C. Leyrat; vsnet-campaign-sn 103).


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

    The object is now at very faint state.  S. O'Connor reported V-magnitude 
  is fainter than 17.0 on October 20 (vsnet-campaign-nl 3).


*** General information ***

  Delta Vel
    eclipse ephemeris, see [vsnet-campaign-deltavel 8]

  IP Peg
    eclipse ephemeris, see [vsnet-campaign-dn 208]

  New VSNET mailing lists: vsnet-constel-
    We have set new VNSET mailing lists, [vsnet-constel]. 
  These presents recent observations reported to VSNET of variable stars 
  grouped with each constellation for subscribers.  If you want to know 
  current state of objects in, for example, Gemini (gem), you should subscribe 
  [vnset-constel-gem] as below:

    mail to "vsnet-adm@kusastro.kyoto-u.ac.jp"
    write in the text;
	SUBSCRIBE vsnet-constel-gem your_e-mail_address


(This summary is reproduction free.)

Regards,
Makoto Uemura

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