For my program ASTAP I'm retrieving the B, V, R magnitudes from VSP using the API. I also like to retrieve the Sloan magnitudes SG,SR,SI. I can't find the instruction to do so. E.g I'm using this url to retrieve the data:
Adding &SG=on&SR=on&SI=on doesn't work. There is no further API documentation at https://www.aavso.org/api-vsp
Can anybody advice?
It works as expected. Must made a mistake previously. Example:
There is not a lot of Sloan data in the VSD, the database of comp stars. We're working on that.
If you are using the API (eg https://app.aavso.org/vsp/api/chart/?format=json&ra=248.851342&dec=9.812754&fov=168&maglimit=15.0000 )
add the clause "&all=on" to make sure you get all that is available for the fov.
In VPhot you load your Sloan images and then request APASS data which does include Sloan. From there you can build a sequence to do your photometry.