[vsnet-alert 4203] Re: RX J0909.8+1849 eclipse observation

["William S G Walker" <astroman@voyager.co.nz>]

Greetings,

A rather disappointing series of small clouds interfered with measures of
the eclipse. However, the following times were noted. All UT, no HC
applied.

Last pre-eclipse observation:                    Feb12      09 35.7
Rising out of eclipse                                               09 50.5
First post-eclipse observation                                  09 59.8

Eclipse depth was greater than 1.7 magnitudes in the CCD natural system.

This suggests that the eclipse ephemeris in VSAlert 4191 is a few minutes
out. If a flat bottom is to be fitted to this particular eclipse the
ingress and egress must be decidedly asymmetric.

Tau 3 continues to fade slowly and in a 40 minute run prior to the
eclipsing star rising we did not find any superhump - but the time duration
makes this observation useful only to indicate that the star had not
disappeared. It appeared about 0.5 magnitudes fainter than on Feb 10.

Regards,
Stan



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> From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
> To: vsnet-alert@kusastro.kyoto-u.ac.jp

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