[Aavso-photometry] V0567 Oph

[arne]

James Roe wrote:
> Last night I was supporting a student project looking at V0567 Oph.  We got
> some good data and I submitted it to the data base (it was in VSX but not in
> the validation file, but it is now I guess).  I looked the star up in the
> ASAS3 database and found a ton of measurements which I used to specify a C
> star in V (but no data in B nor Ic).  We took data in B and Ic but I'm not
> sure how to prepare the data without C stars in these bands?  Advice please?
> 
> Also, is there a way I can help get the ASAS data into the AAVSO data base
> for this star?  Is this what data mining is all about?
> 
We're working on an automated way to get ASAS data into the International
Database.  Until then, contact Shawn Dvorak, who has scripts to
pull off ASAS data on specific stars.

V567 Oph looks like a field that I have not yet calibrated at NOFS
nor SRO.  Therefore, you have to look for other calibration photometry.
There is always Tycho2 to give you basic B and V photometry of
nearby comparison stars. The TASS Mark IV patches photometric
catalog will give you rough Ic magnitudes for your comparison stars.
You can also use CMC14 or DENIS magnitudes and transform to obtain Ic.
You can determine BVIc yourself via all-sky methods.  Finally, you
can submit the raw differential data using the AAVSO extended format,
identifying the comparison star that you used, and let a future
researcher calculate its true magnitudes once the comparison
star is properly calibrated.

In a few months, you should be able to use APASS calibrations to
take care of the entire problem.
Arne