[vsnet-alert 2826] U Sco entering the final fading stage!!

[Taichi Kato <tkato>]

U Sco entering the final fading stage!!

Dear Colleagues,

   Preliminmary analysis of Apr. 2 and 3 observations by the Ouda team
seems to indicate that the recurrent nova U Sco is entering the final
fading (turning-off) stage from the apparent plateau at mag 14-15.
The fading trend became apparent since Mar. 31 observation.

   All sorts of observations, including spectroscopy, time-resolve photometry,
multiwavelength observations are more urgently recommended.

   Recent observations:

  YYMMDD(UT)   mag  observer
  990320.323   145  (R. J. Modic)
  990320.422   146  (R. J. Modic)
  990321.807   143  (A. Pearce)
  990321.808   143  (A. Pearce)
  990322.656  14.49Rc  (S. Kiyota)
  990322.662  14.38Rc  (S. Kiyota)
  990322.667  14.73V  (S. Kiyota)
  990322.672  14.85B  (S. Kiyota)
  990322.678  14.89B  (S. Kiyota)
  990322.683  14.72V  (S. Kiyota)
  990322.686  14.47Rc  (S. Kiyota)
  990322.690  14.80B  (S. Kiyota)
  990322.694  14.65V  (S. Kiyota)
  990322.700  14.80V  (S. Kiyota)
  990322.708  14.78V  (S. Kiyota)
  990322.711  14.79V  (S. Kiyota)
  990322.715  14.86V  (S. Kiyota)
  990322.719  14.79V  (S. Kiyota)
  990322.722  14.81V  (S. Kiyota)
  990322.726  14.89V  (S. Kiyota)
  990322.730  14.82V  (S. Kiyota)
  990322.733  14.92V  (S. Kiyota)
  990322.738  14.84V  (S. Kiyota)
  990322.740  <131  (H. Maehara)
  990322.741  14.85V  (S. Kiyota)
  990322.744  14.87V  (S. Kiyota)
  990322.749  14.87V  (S. Kiyota)
  990322.752  14.92V  (S. Kiyota)
  990322.756  14.81V  (S. Kiyota)
  990322.760  14.99V  (S. Kiyota)
  990322.763  14.99V  (S. Kiyota)
  990322.784  15.10V  (S. Kiyota)
  990322.787  15.05V  (S. Kiyota)
  990322.792  15.10V  (S. Kiyota)
  990322.795  15.10V  (S. Kiyota)
  990322.799  15.08V  (S. Kiyota)
  990322.806  15.26V  (S. Kiyota)
  990322.832  15.15C  (Ouda team)
  990322.848  15.05C  (Ouda team)
  990323.776  14.52C  (Ouda team)
  990323.783  14.54C  (Ouda team)
  990323.792  14.55C  (Ouda team)
  990323.800  14.57C  (Ouda team)
  990323.807  14.56C  (Ouda team)
  990323.816  14.55C  (Ouda team)
  990323.824  14.60C  (Ouda team)
  990323.832  14.62C  (Ouda team)
  990323.842  14.62C  (Ouda team)
  990324.072   149  (L. T. Jensen, CCD unfiltered)
  990324.720   144  (R. Stubbings)
  990325.801   144  (A. Pearce)
  990326.083   142  (B. Monard)
  990326.683   143  (R. Stubbings)
  990326.802   145  (A. Pearce)
  990327.714  <142  (S. Takahashi)
  990327.796  <145  (A. Pearce)
  990327.803  15.69C  (Ouda team)
  990327.810  15.59C  (Ouda team)
  990327.819  15.59C  (Ouda team)
  990327.826  15.50C  (Ouda team)
  990327.835  15.50C  (Ouda team)
  990328.110   145  (B. Monard)
  990328.703  <128  (H. Maehara)
  990328.822  15.16C  (Ouda team)
  990329.815  <146  (A. Pearce)
  990331.735  15.68C  (Ouda team)
  990331.748  15.58C  (Ouda team)
  990331.762  15.61C  (Ouda team)
  990331.778  15.68C  (Ouda team)
  990331.792  15.68C  (Ouda team)
  990331.808  15.51C  (Ouda team)
  990331.824  15.73C  (Ouda team)
  990402.803  16.63C  (Ouda team)  fading!!
  990402.810  16.66C  (Ouda team)
  990402.819  16.72C  (Ouda team)
  990402.826  16.51C  (Ouda team)
  990402.833  16.70C  (Ouda team)

Regards,
K. Matsumoto and T. Kato,
Ouda team

VSNET Home Page

Return to Daisaku Nogami

---

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