We are excited to announce the launch of our new forums! You can access it forums.aavso.org. For questions, please see our blog post. The forums at aavso.org/forum have become read-only.
Announcement: New Applications
We are excited to announce the launch of our new applications! We're opening up early access to our new applications for searching, downloading, and submitting photometric observations. You can now access these applications through these links:
We ask for your feedback in order to help us improve these applications. Please send feedback for the applications above to feedback@aavso.org. Note: please avoid duplicating submissions across the two submit applications.
Some conversion references:
http://www.aerith.net/astro/color_conversion.html
http://arxiv.org/pdf/astro-ph/0609121v1.pdf
I have not checked, but I think that should answer your needs.
What we use in Seqplot comes from Jester, et al. (2005)
V-Rc = 1.09 * (r-i) + 0.22 +/- 0.03
Rc-Ic = 1.00*(r-i) + 0.21 _/- 0.01
for stars with (Rc-Ic) < 1.15
We expect to derive our own relationships later in the project.
Arne