[vsnet-chat 4235] Re: V1494 Aql (fwd)

[Taichi Kato <tkato>]

Re: [vsnet-chat 4220] Re: V1494 Aql (fwd)

> Thank you for your reply on my comments in the case of V1494 Aql. I still am
> convinced that observer Ort estimated the comparison-star. As an experienced
> observer I have doubts about your statement, that "some novae look particularly
> brighter to some observers". Why? Maybe in the case of deep-red bright carbon-
> stars, when obervers use different observing-methods : direct and averted 
> vision.

    I may have written this somewhere in the past, but QU Vul was the best
example which showed more than 1 mag difference between observers (using
the same chart) during its nebular phase.  This is very likely caused by
the strong [OIII] line, the sensitivity to which may vary from observer
to observer.  PW Vul showed similar effect, and some observers even
reported the effect is dependent on the magnification.  I don't think
it totally unlikely similar effect may have worked in V1494 Aql.

    Furthermore, there is already a marked deviation of the same degree,
for which no one apparently had a claim.

  YYYYMMDD(UT)   mag  observer
  20000912.842   112  (E. Muyllaert)
  20000912.844   108  (P. A. Dubovsky)
  20000912.869   111  (G. Poyner)
  20000913.060   109  (E. van Ballegoij)
  20000914.819    98  (G. Gyzman)         <---
  20000914.842   112  (E. Muyllaert)
  20000915.048   112  (E. van Ballegoij)
  20000915.878   112  (J. Ripero)
  20000916.799   112  (R. J. Bouma)
  20000916.806   111  (G. Comello)
  20000916.860   110  (M. Verdenet)
  20000917.108   111  (M. Simonsen)
  20000917.601   112  (A. Pearce)

    I have already forwarded the message to the original observer, and
would like to leave the decision to the observer.

Regards,
Taichi Kato

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