Skip to main content

GAIA Passbands

1 post / 0 new
clkotnik's picture
GAIA Passbands

I am looking for discussion on how best or how people would prefer to look at GAIA passbands.  Either the passbands defined by the survey or transformed to Johnson/Cousins and / or Sloan.  For the latter and additional details see this paper GAIA Data Release 2 Photometric content and validation

By way of background, I found the GAIA DR2 survey and public access to the data interesting.  I downloaded the half million objects GAIA found as "variables" and cross-matched it to the half million variables in VSX.  As I began to explore the intersection and differences, I found myself frequently going through a multistep, manual process to load the GAIA epoch photometry into VStar.  This gave me the incentive to try my hand at a VStar plugin to simply the process. 

So basically, I am looking for suggestions on how others would want this plugin to handle the passbands.

You can see in appendix A of the GAIA paper the transformation they recommend.  Also you will see in section 7 that the GAIA team have cross-matched agains APASS and report good correlation.  I suppose this validation involved the transformations.  If anyone was involved with this validation and cares to elaborate, please do.

Thanks in advance for you thoughts and suggestions,


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