[vsnet-chat 7619] APASS graphs

[Ap Graph]

Data source :- ftp://ftp.aavso.org/public/calib/master_apass.zip

Following on from points made here :- 
http://www.aavso.org/apass-dr1-happening-soon

"Currently, the astrometry for APASS is better than one arcsec, especially in 
sparse fields, and the photometry is about 0.03-0.05 mag accuracy, depending on 
the number of nights of observation and their quality.  DR1 will include all 
objects with at least two nights of observation; the final catalog will have a 
minimum of four photometric observations per object."