[vsnet-alert 4986] re: eta Carinae

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

Greetings,

There has been some discussion of the trend of eta Carinae at the moment.
The latest readings by Harry Williams suggest that the star is now fading
slightly. They show (JD-2400000, V, B-V, U-B):

51560.9347,5.125,.695,-.301
51606.8692,5.124,.695,-.332
51612.8989,5.128,.667,-.285
51620.8788,5.103,.673,-.304
51625.9255,5.100,.672,-.329
51627.8502,5.092,.699,-.299
51630.8758,5.096,.668,-.313
51635.8901,5.098,.677,-.321
51666.9385,5.110,.673,-.308
51688.8220,5.120,.645,-.379
51703.8638,5.174,.683,-.304
51710.8499,5.179,.668,-.303

Errors are about 3%, 3%, 5%, and in summary it appears that the star
reached a peak about 80 days ago in late March, 2000. Observations
continue. Note that the total range during the past 5 months has only been
8%, which is only just outside the error frame.

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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