It's that time of year that our favorite calibration targets, M67 and NGC 3532, are conveniently in the evening sky. You all have heard how important it is to transform your photometric observations: it makes our data more valuable. So let's all do it! Take a look at the lead post in the past campaign forum thread : We have the tools and training materials to make this process accessible to all.
And... And we have a special incentive for observers to try their hand at transformation: participants will be entered in a raffle to win $500 generously donated by members of the AAVSO!
To become eligible:
1) Report your B and V band transform coefficients (Tv_bv and Tb_bv (eV and eB for you Pep guys cause you can play too) ), along with the method you used to determine them, to this forum. Include the make/model of your OTA, filters, and camera. If you already have coefficients in hand from June of 2016 or later, they are acceptable. And it doesn't have to be M67 that you use: M11, NGC 1252 and NGC 3532 in the South are now all available with reference data for your calibration.
2) Submit transformed B and V magnitude pairs acquired between today and May 15, 2017 (JD 2457889.0) for at least ten stars. Data must be received in WebObs by May 31, 2017, local time.
Observers world-wide are eligible (a winner outside of the US will be paid with an international money order in US funds).