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[vsnet-chat 4170] U Piscis Austrini - an RR Lyrae type variable
- Date: Tue, 3 Apr 2001 17:51:59 +1000
- To: <vsnet-chat@kusastro.kyoto-u.ac.jp>
- From: "Rod Stubbings" <stubbo@sympac.com.au>
- Subject: [vsnet-chat 4170] U Piscis Austrini - an RR Lyrae type variable
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
U Piscis Austrini - an RR Lyrae type variable
U PsA is unclassified in the GCVS with a spectral class of GO: with a
variation range from 12.5 to <14.0. This star was first drawn to my
attention by articles in SKY & SPACE by Peter Williams. The observations
from a few observers attributed possible periods of 117 an 235 days.
Analysed visual observations from RASNZ suggested that it was a semi-regular
variable, SRd, with a period of ~35 days.
My visual observations over the period 1996 to 2000 revealed short term
fluctuations and a DFT analysis by Stan Walker revealed a period of 0.54187
days. This was confirmed by Stan with CCD measures during the 2000 season.
The shape, period and light curve indicate that U PsA is an RR Lyrae
variable star. A detailed paper will appear shortly in the JAAVSO.
Regards,
Rod Stubbings.
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