[vsnet-alert 11804] U Sco time-series from morning of 30 Jan - no obvious modulation

Tom Krajci tom_krajci at tularosa.net
Sun Jan 31 03:56:32 JST 2010


AAVSOnet telescope Wright-28 took about 100 minutes of time-series data 
(JD 226.98 - 227.05) of U Sco the morning of 30 Jan from Cloudcroft, New 
Mexico.  Exposures were V filter, 30-seconds, using BD-17 4559 = comp106.

Uncalibrated/untransformed magnitude was approximately 10.0, and casual 
visual inspection does not show any obvious modulation to the light 
curve.  (Calibration and more careful analysis may show otherwise, but 
so far nothing jumps out at me in this data...featureless/flat light 
curve..except for the possibility of a low frequency/low amplitude feature.)

Weather forecast for next two days is iffy...cirrus moving in from 
west...then another snow storm may move into the southwest US.

Tom Krajci

PS.  AAVSOnet telescope BSM (Bright Star Monitor) took a IRVBBVRI series 
of the U Sco area (2 x 1.5 deg) in the hopes of obtaining better 
calibration of some comp stars. 

PPS.  Previous attempts to take data were prevented by weather, and snow 
removal issues.  See:
<http://picasaweb.google.com/tom.krajci/Jan2010SnowHeavenAndHell#> 
starting with image 7 to show local conditions during the last week.

-- 
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Tom Krajci
Cloudcroft, New Mexico
http://picasaweb.google.com/tom.krajci

Center for Backyard Astrophysics (CBA)
http://cbastro.org/ CBA New Mexico

American Association of Variable Star
Observers (AAVSO): KTC http://www.aavso.org/
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