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RZ Leo observations critical now for HST/COS and IU Leo next target

weo
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AAVSO Special Notice #346 (http://www.aavso.org/aavso-special-notice-346) gives up-to-the-minute details on the HST/COS observations planned for RZ Leo on April 11 UT - your observations tonight and tomorrow are CRUCIAL -  and IU Leo on April 18 UT.

Thank you and good observing  -  Elizabeth Waagen, AAVSO HQ

RZ Leo Observations
WGR
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Hello

I did a little analysis of my observations on this object, for JD xxx6385, 6389 and 6391.  What may look initially like a big noise spike, is actually quite interesting.  If one plots this data with an X axis of 0.1 days, it is seen that the data does have some structure.  In addition, the V data is supported by the B data for the first two nights.  It almost looks like a cepheid light curve, with a period of .02 days, or 30 minutes.  The timing is not constant.  The mag is quite faint, 18 to 21 mag, but there may be something there.

Forecast is iffy for tonight.  If its clear, I may try it.  Hope someone else is clear.  Take a time series if you are interested and see what you get.

Gary

Correction to Special Notice #346
weo
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AAVSO Special Notice #347 (http://www.aavso.org/aavso-special-notice-347) makes a correction to Special Notice #346, in which Dr. Szkody was misquoted as saying IU Leo has a close companion. It is actually IY UMa that has this companion. Sincere apologies to Dr. Szkody and our readers.

Elizabeth Waagen, AAVSO HQ

RZ Leo Observations
WGR
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Somewhat clear.  Got it at 18.5 aprox.

 

Gary

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484