Photometric Coefficients

The coefficients in the table below are reproduced from Valenti et al., MNRAS, 459, 3939 (2016).

Zero-points, color terms, and extinction coefficients have been measured during photometric nights using the following equation:

mi − mc = Z + Ci × color + K × airmassi

where mi is the instrumental magnitude for an observed star, mc is the magnitude from the APASS catalogue, Ci is the color of this star from the APASS catalogue, and airmassi is the airmass at which the star was observed.

Site dome Instrument Filter ZP ZP ZP Color Color term Extinction
2013 2014 2015
Australia b SBIG g' 23.05 22.90 22.75 g'-r' +0.137 (021) 0.21 (04)
Australia b SBIG r' 22.80 22.65 22.50 r'-i' -0.005 (011) 0.10 (04)
Australia b SBIG i' 22.10 22.00 21.90 r'-i' +0.007 (014) 0.07 (04)
Australia b SBIG B 22.44 22.30 22.15 B-V -0.025 (022) 0.20 (06)
Australia b SBIG V 22.80 22.63 22.50 B-V +0.017 (025) 0.14 (07)
Chile c Sinistro g' - 23.60 23.50 g'-r' +0.109 (014) 0.14 (03)
Chile c Sinistro r' - 23.50 23.35 r'-i' +0.027 (013) 0.08 (02)
Chile c Sinistro i' - 23.10 22.90 r'-i' +0.036 (016) 0.06 (03)
Chile c Sinistro B - 23.00 22.85 B-V -0.024 (011) 0.23 (03)
Chile c Sinistro V - 23.25 23.15 B-V -0.014 (030) 0.12 (05)
Chile a SBIG g' 23.05 22.85 22.70 g'-r' +0.120 (018) 0.14 (03)
Chile a SBIG r' 22.80 22.65 22.50 r'-i' -0.002 (018) 0.08 (02)
Chile a SBIG i' 22.15 21.00 21.90 r'-i' +0.019 (022) 0.06 (03)
Chile a SBIG B 22.45 22.35 22.15 B-V -0.035 (019) 0.23 (03)
Chile a SBIG V 22.75 22.60 22.45 B-V +0.000 (036) 0.12 (05)
Texas a SBIG g' 22.95 22.75 22.60 g'-r' +0.114 (018) 0.15 (07)
Texas a SBIG r' 22.80 22.60 22.40 r'-i' -0.004 (017) 0.09 (04)
Texas a SBIG i' 22.05 21.95 21.70 r'-i' +0.024 (023) 0.07 (04)
Texas a SBIG B 22.25 22.10 22.00 B-V -0.039 (022) 0.22 (05)
Texas a SBIG V 22.65 22.45 22.30 B-V -0.005 (035) 0.15 (05)
Chile b Sinistro g' - 23.45 23.35 g'-r' +0.109 (014) 0.14 (03)
Chile b Sinistro r' - 23.40 23.30 r'-i' +0.027 (013) 0.08 (02)
Chile b Sinistro i' - 23.10 23.00 r'-i' +0.036 (016) 0.06 (03)
Chile b Sinistro B - 22.75 22.60 B-V -0.024 (011) 0.23 (03)
Chile b Sinistro V - 23.15 23.05 B-V -0.014 (030) 0.12 (05)
South Africa a SBIG g' 23.00 22.85 22.70 g'-r' +0.112 (016) 0.16 (05)
South Africa a SBIG r' 22.75 22.60 22.50 r'-i' -0.001 (014) 0.10 (04)
South Africa a SBIG i' 22.10 22.05 21.95 r'-i' +0.013 (022) 0.07 (04)
South Africa a SBIG B 22.35 22.20 22.05 B-V -0.030 (020) 0.19 (09)
South Africa a SBIG V 22.60 22.50 22.35 B-V -0.019 (025) 0.14 (06)
Australia a SBIG g' 23.05 22.90 22.75 g'-r' +0.137 (021) 0.21 (04)
Australia a SBIG r' 22.80 22.65 22.50 r'-i' -0.005 (011) 0.10 (04)
Australia a SBIG i' 22.10 22.00 21.90 r'-i' +0.007 (014) 0.07 (04)
Australia a SBIG B 22.44 22.30 22.15 B-V -0.025 (022) 0.20 (06)
Australia a SBIG V 22.80 22.63 22.50 B-V +0.017 (025) 0.14 (07)
South Africa c SBIG g' 23.05 22.90 22.75 g'-r' +0.112 (016) 0.16 (05)
South Africa c SBIG r' 22.80 22.65 22.50 r'-i' -0.001 (014) 0.10 (04)
South Africa c SBIG i' 22.10 22.00 21.90 r'-i' +0.013 (022) 0.07 (04)
South Africa c SBIG B 22.44 22.30 22.15 B-V -0.030 (020) 0.19 (09)
South Africa c SBIG V 22.80 22.63 22.50 B-V -0.019 (025) 0.14 (06)
South Africa b SBIG g' 23.05 22.90 22.75 g'-r' +0.112 (016) 0.16 (05)
South Africa b SBIG r' 22.80 22.65 22.50 r'-i' -0.001 (014) 0.10 (04)
South Africa b SBIG i' 22.10 22.00 21.90 r'-i' +0.013 (022) 0.07 (04)
South Africa b SBIG B 22.44 22.30 22.15 B-V -0.030 (020) 0.19 (09)
South Africa b SBIG V 22.80 22.63 22.50 B-V -0.019 (025) 0.14 (06)