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[vsnet-obs 27053] S obs of 31/3/00
- Date: Sat, 01 Apr 2000 09:01:02 +0200
- To: <observations@aavso.org>, <vsnet-obs@kusastro.kyoto-u.ac.jp>
- From: "Berto Monard" <lagmonar@csir.co.za>
- Subject: [vsnet-obs 27053] S obs of 31/3/00
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- Sender: owner-vsnet-obs@kusastro.kyoto-u.ac.jp
Visual observations of 31 March 2000
observer: Berto Monard MLF, Pretoria, South Africa
instruments: 32cm /f4.8 Newtonian
conditions: clear and humid morning observations
HYAEX 000331.06 129 MLF
CENV803 000331.051 144 MLF
CENV834 000331.066 141 MLF
LIBGW 000331.08 <143 MLF
LIBHP 000331.08 137 MLF * Henden seq.
SCOU 000331.09 <143 MLF
SCOV818 000331.09 123 MLF
SCOV893 000331.088 140 MLF
HEN3-1341 000331.1 109 MLF
ARAFV 000331.09 <141 MLF
NSV08383 000331.09 <143 MLF
CRAV394 000331.09 <142 MLF
SCOV745 000331.09 <140 MLF
SCOV723 000331.09 <142 MLF
SGRV4338 000331.09 <140 MLF
SGRV1860 000331.1 122 MLF
SGRGU 000331.1 104 MLF
SGRV1017 000331.10 137 MLF
SGRV3890 000331.10 <141 MLF
SGRV441 000331.10 <142 MLF
SGRV4641 000331.102 134 MLF
SGRV1223 000331.10 133 MLF
SGRFN 000331.1 117 MLF fading
SGRV4368 000331.1 104 MLF
SGRV919 000331.1 130 MLF
PKS2005-489 000331.11 132 MLF
PKS2188-304 000331.11 129 MLF
* HP Lib (Lib 5 in the cv atlas of 1997) is a ibwd system similar to V803 Cen. No outbursts have been reported (recorded?) so far.
It is not impossible that this system of interacting white dwarfs might eventually evolve into a phase of instability as is the case with other similar systems. Perhaps it will not. The only way to find out is to monitor it. I do that since a couple of months but it would be interesting if other observers were to join. Possibly some do already. Timeseries will definitely yield low amplitude cyclic ripples..
Located at position 15 35 53.1 -14 13 12, HP Lib is reachable from both hemispheres and at 13.7V (hopefully brighter sometime in the future..) it will be visible in many a telescope.
A Henden has measured the HP Lib starfield twice and his accurate data are accessible on his website. Unfortunately I don't have the URL here.
Regards,
Berto Monard
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