[vsnet-chat 5975] Re: [AAVSO-DIS] CCD-V Vs visual observations

[BailyHill@aol.com]

In a message dated 2/11/03 12:14:24 PM, lolife@bitstream.net writes:

<< For non-survey type CCD observations it just baffles me why anyone 
would submit any observations that were not as careful and as correct 
as possible. Observations are worse than useless if you don't take care 
in the reduction and reporting. >>

I guess I would like to hear what steps other folks are taking to make sure 
that their observations are as correct as possible.  

What checks are being made?

How many comp stars do you use?

How large a spread of your estimates between comps stars do you allow before 
you reject an observation and not submit it?

Do you look at your previous observations of the same star to make sure that 
the current estimate is not too far off?  How far off is too far?

Do you look at the quick look file or the light curve generator and see what 
a star is doing to make sure that your observation is not too far off?

What do you do with a CV that is in outburst and you are the only observation 
in outburst and your estimate is 1-2 magnitudes brighter than typical that 
previous observations in the light curve generator?  

Suppose a star is an LPV.  Your observation differs from the last one, 10 
days ago in the quick look file.  How large a deviation would you accept 
before discarding it.  

How much apriori information do you collect to make sure that every 
observation is within limits.  How big are your limits?  What type of star do 
you impose this process on?  

What other suggestions do you have for screening observations?  Specific 
things you do.  I am sure that everyone want to turn in accurate data.   What 
is needed is a set of guidlines.  I would like to hear just what others are 
doing.

Clear Skies

Gary

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