For those of you who understand the need and process of transforming your data, this is just a reminder that the best calibration field for renewing your transformation coefficients is conveniently placed in the evening sky.
For those not yet familiar with transformation: take images of M67 now in all your filters. And then at your leisure learn the process:
- Look at chapter 6 of the CCD Manual : https://www.aavso.org/ccd-camera-photometry-guide
- A power point explanation https://www.aavso.org/sites/default/files/Transformations_Silvis02.pptx
- Background on the interaction of filters with sensors: https://www.youtube.com/watch?v=urgkBDkiUEE
The AAVSO has the tools to make the process, if not easy, at least doable.
- To generate your transform coefficients from your M67 images: https://www.aavso.org/tg
- To apply your coefficients to your webobs submissions: https://www.aavso.org/transformapplier
Once you master your scope and imaging techniques and are submitting your data to WebObs, the next step in your learning process is to transform that data. This improves its comparability with data from other astronomers.
For now, take those images pf M67!
Thanks for the reminder George!
I am presently in Ed Wiley's course CCD Photometry, Parts 1 & 2 (2023).
Making good progress, hopefully will get there.
Steve Hoffman - HSTG