wpo - session spectra - 2003 Nov
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Semi-Regulars ...WPO
Rho Cas
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AK Cep [DCEP]; epsilon Cep [DSCT] v GSC3693:1720;
changes to d Cep over 48 hours and zeta Cep+M-type
spectrum GSC3991:137 Cep.
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AAVSO requested spectrum of new variable GSC3693:1720
following
UV Per with nearby b and d
Cep variables for comparison.
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Session includes S&T featured Miras S Peg, T
Eri and R Gem and whilst latter pair rising/clearing trees many red LVP
in Peg etc.
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X Peg [currently in X-ray outburst according to Cardiff
Uni/Chandra] taken Nov 12 and shows weak Ha
emission as a g Cas shell star.
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exposure duration indicates relative transparency
and brightness of star eg fainter stars/ higher res need longer exposures
for a good S/N ratio.
2003 Nov 12
text & images copyright - Maurice Gavin 2003
