[vsnet-campaign 65] Weekly Campaign Summary

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

(This is a summary of vsnet-campaign and vsnet-alert last week.)

Weekly Campaign Summary

*** Last week news ***

  XTE J1118+480

     The about 4-hour periodic variation is still seen in the light 
  curve, however, the profile has been changed from sinusoidal curve 
  to superhump-like shape.  The evolution of humps is ongoing 
  (vsnet-campaign 5,21).  The object showed a slight decline from 
  the end of April (vsnet-alert 4796). 
     "ASCA - VSNET multiwavelength campaign on XTE J1118+480" was 
  performed on 11 May (vsnet-campaign 10).  ASCA had successful 
  observations and many observers joined the campaign.  Unfortunately, 
  some site could not observe due to rain, however, we have already 
  received the simultaneous data from Nyrola team and Y. Sano and 
  V. Simon and R. Novak reported the successful observation 
  (vsnet-campaign 36,41).  On the other days data, we have received 
  from L. Cook, D. Buczynski, B. Martin, G. Masi, Nyrola team, R. Novak, 
  and Y. Sano. 
     The period of short-time fluctuation and the current feature of 
  longer period variation are poorly unknown.       

    
  CI Aql

     From the data on 5 May at Kyoto, it was suggested a relatively 
  large phase offset may be necessary from proposed eclipse ephemeris 
  (vsnet-campaign 7).  A possible secondary eclipse was observed on 
  8 May at Kyoto and Tsukuba (vsnet-campaign 16).  The object kept 
  the roughly constant magnitude of 9.1 in early May, and then, 
  showed decline (vsnet-alert 4802).  The magnitude is currently
  about 10mag.  We have received four very extensive sets of time-series 
  from L. Kral on 15 May. 
     The complete eclipse light curve cannot be seen yet.


  BZ UMa

     As reported in [vsnet-outburst 2] and described in [vsnet-alert 4827],
  the outburst of suspected SU UMa-type dwarf nova BZ UMa was detected 
  by G. Hanson (10.5mag on 13 May).  R. Novak reported a rapid fading 
  indicating the outburst is a normal one (vsnet-campaign 47), and 
  E. Pavlenko, M. Moilanen, and A. Oksanen confirmed it (vsnet-campaign 51,54).
     Please keep monitorings for the case of the transition to 
  superoutburst.


  RX J0640-24

     As reported by Rod Stubbings and Berto Monard in vsnet-outburst 
  messages, the ROSAT-selected suspected SU UMa-type star RX J0640-24 
  is in outburst (vsnet-campaign 49).  The brightness on 13.396 UT was 11.8.
     The superhump detection is expected.


  RX J1450.5+6403

     T. Vanmunster discovered an outburst of RX J1450.5+6403 on 14 May 
  at 14.4mag (vsnet-alert 4834).  D. Nogami confirmed the object to 
  be in quiescence on May 11.10 (UT) (vsnet-alert 4837).  T. Vanmunster 
  detected superhumps with the period of 0.0617d, and revealed the 
  current outburst is a superoutburst of a newly discovered SU UMa-type 
  dwarf nova. 


*** This week schedule ***

  NGC 4151 ASCA-VSNET multiwavelength campaign 
	from May 12 12:00 to May 24 24:00 (UT), 
	for more detail, see [vsnet-campaign 61,62]

  near-IR observation on XTE J1118+480 with 1.23m CAHA 
	(by Dr. Alberto Castro-Tirado)
	16-20 May (20:00-05:00 UT),
	for more detail, see [vsnet-campaign 63]


*** General information ***

  XTE J1118+480
     recommended comparison star and more UBVRI sequence information: 
	  see [vsnet-campaign 11]
  CI Aql
     eclipse ephemeris, see [vsnet-campaign 18]
  BZ UMa
     Visual observations - AFOEV database was posted in [vsnet-campaign 45]
	  or see, http://astro.u-strasbg.fr/afoev
  RX J1450.5+6403
     location and RASS, USNO identification, 
	see [vsnet-alert 4834,4835,4836]

Regards,
Makoto Uemura

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