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campaign in two filters V and I

coliac's picture
coliac
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Joined: 2012-05-20

Dear all,

I would like to do photometry of a variable star in two filter, V and I.

I guess that I use the I value in the photometric table of the star in VSP instead of V value to do the analysis with my software.

Is it the only thing to do to report in webobs or is there other process to do ?

Many thanks for your answers.

Jean-françois

Processes for V and I
WGR's picture
WGR
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Joined: 2010-08-17

Hello Jean-françois

What you suggest will give a perfectly good submittal to WebObs.  If you want to go further, depending upon the precision and accuracy you want to achieve, you can remove the atmospheric extinction, and you can transform your data to the standard system.

Gary

Dear Gary, I thank you. I
coliac's picture
coliac
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Joined: 2012-05-20

Dear Gary,

I thank you. I understand that the process is the same in V than in I. We need only to take I mag instead of V mag for reference stars...

Clear skies

Jean-françois

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