[vsnet-chat 21] Purkinje's effect in estimating novae

[Taichi Kato <tkato>]

    From my experience, Purkinje's effect is most clearly felt when estimating
novae during the nebular stage.  During this stage novae show strong emission
lines of [OIII], to which nocturnal vision is far more sensitive.  Against
bright sky background of Japan, novae in this stage look much brighter in
high-magnification field -- sometimes amounting to 1 mag.  Similar effect
has been reported in the case of RS Oph, though I'm not sure whether this
is also attributable to Purkinje's effect.

Regards,
Taichi Kato
Kyoto University

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