HJZ Affiliation American Association of Variable Star Observers (AAVSO) Sat, 07/28/2012 - 18:14 Anyone have the conversion formulae handy to convert the Johnson B and V (or Sloan) values in APASS to Ic and R? KTC Affiliation American Association of Variable Star Observers (AAVSO) Sat, 07/28/2012 - 19:17 Some conversion references 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. Log in or register to post comments HQA Affiliation American Association of Variable Star Observers (AAVSO) Sat, 07/28/2012 - 19:34 Rc/Ic conversions for APASS 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 Log in or register to post comments
KTC Affiliation American Association of Variable Star Observers (AAVSO) Sat, 07/28/2012 - 19:17 Some conversion references 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. Log in or register to post comments
HQA Affiliation American Association of Variable Star Observers (AAVSO) Sat, 07/28/2012 - 19:34 Rc/Ic conversions for APASS 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 Log in or register to post comments
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