P. S. Goraya*
Abstract. Spectrophotometrically measured continuum energy distribution
of Gama Cassiopeiae are presented during six nights in the wavelength range
of lambda lambda
3200-8000 Ao. The observations are compared with the theoretical models
and
are used to derive the values of effective temperature, gravity and to
explore
the behaviour of the continuum.
It is found that Gama Cassiopeiae exhibited moderate to strong
near-ultraviolet
and near-infrared excess radiation over the underlying photospheric
emission,
with variable intensity on a time-scale of months to years. The amount
of
extra emission has been measured in magnitude units. The discovery of
two
steps in Balmer jumps during one night is being reported for the first
time in
this star. The second step of Balmer jump is found strongly in emission
and
exhibited short time-scale variations. The measures of Balmer jumps and
lambda1(Ao) parameters are also made for this star.
Keywords: Spectrophotometry stars :
variability excess emission : individual Gama
- Cassiopeiae.
Department of Physics, Punjabi University, Patiala 147
002, Punjab, India