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102
APPENDIX F. GLOBAL OPTIONS
Default
v
Force iband
Override the filter specification from the frame header with the one set in
the Instrumental band parameter.
Config file
Type
Default
.aphot.force_iband
boolean
no
Default catalog error
Default standard magnitude error used when a value is not available.
Config file
Type
Default
.aphot.def_std_err
real
0.050
Alpha
Parameter of the robust fitting alogorithm. It sets the fwhm of the rejection
function (in standard deviations).
Config file
Type
Default
.aphot.alpha
real
2.000
Beta
Parameter of the robust fitting alogorithm. It sets the sharpness of the
rejection function, with higher values resulting in a sharper falloff.
Config file
Type
Default
F.9
.aphot.beta
real
2.000
Multi-Frame Photometry Options
Bands setup
A string which specifies the color indices against which we reduce various
bands. It consists of a space-separated list of specifiers of the form: band(b1b2)[=k/kerr]. In this case, ”band” will be reduced against the b1-b2 color
index. The optional k and kerr set the default transformation coefficient