[vsnet-alert 206] possible start of fading of Nova Cas 1993 = V705 Cas

[tkato@kusastro.kyoto-u.ac.jp]

V705 Cas = Nova Cas 1993

  M. Nakatani (VSOLJ; Miyagi, Japan) has suspected in his regular reports
of visual variable star observations that Nova Cas 1993 = V705 Cas may have
started detectable fading after its long-lasting apparently constant
'plateau' stage since the recovery from the deep dust minimum observed
more than a year ago.

  Since it is well known dark adaptation modifies the sensitivity of the
human eye to the emission lines that predominate in the nebular phase of
novae, confirmation by photoelectric or spectroscopic observations would
be very important.  Observations for testing any change of excitation
levels would be also interesting.

  Selected observations by M. Nakatani from vsnet-obs messages (the first
column represents the message number):

841:CASV705        950730.546   123  Nts.VSOLJ
911:CASV705        950808.556   122  Nts.VSOLJ
936:CASV705        950815.546   124  Nts.VSOLJ
959:CASV705        950819.585   125  Nts.VSOLJ

  CCD images with V-magnitudes of this nova can be found in vsnet anonymous
ftp (ftp.kusastro.kyoto-u.ac.jp), in /pub/vsnet/Novae/nova_cas93, files
ncasim*.gif.

Regards,
Taichi Kato

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