AB Aur check star not loading in VPHOT

American Association of Variable Star Observers (AAVSO)
Wed, 01/25/2023 - 21:40

The AB Aur campaign has asked observers to use a specific comp star and check star for all observations.  When I load an image into VPHOT and call up the comp star catalog, it brings 120 comp star 000-BKG-374, but not 000-BPN-255.  The latter star is the one that we are asked to use as the check star.  000-BPN-255 was recently added to the AAVSO photometry database.  Could that be why it is not being called up automatically in VPHOT?  I am also concerned that observers are using the wrong check star because of the issue. I'd appreciate your help resolving the issue.



American Association of Variable Star Observers (AAVSO)
VSP problem not VPhot


There is an inconsistency in VSP and the auid you reported. Look at VSP chart and photometry table for AB Aur not the RA/Dec. Something is not correct. BPN-255 is the 120 comp. BKG-374 does not exist. 

I recommend you bring this to the attention of the sequence team.