d126_ubvcalib.txt
The following calibration format can be used directly in
IRAF.digiphot.photcal.invertfit. The instrumental magnitudes
mU, mB, and mV are -2.5*log(counts/s)+25.
For the these images, the average parameters for UBV are the following:
Airmass---1.08, 1.00, 1.04
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Wed 09:38:20 05-Jun-2002
begin UFIT
status 0 (Solution converged)
variance 0.01122167
stdeviation 0.1059324
avsqerror 0.01231251
averror 0.1109617
avsqscatter 0.01099251
avscatter 0.1048452
chisqr 0.911404
msq 0.01085968
rms 0.1042098
reference mU
fitting (UB+BV+V)+u1+u2*XU+u3*UB+u4*UB*XU
weights photometric
parameters 4
u1 (constant)
u2 (fit)
u3 (constant)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
5.203
0.5026113
-0.0911
0.
errors 4
0.
0.01420032
0.
0.
# Wed 09:41:23 05-Jun-2002
begin BFIT
status 0 (Solution converged)
variance 0.001075729
stdeviation 0.03279831
avsqerror 0.001074409
averror 0.03277817
avsqscatter 9.276905E-4
avscatter 0.03045801
chisqr 1.001229
msq 0.001015966
rms 0.03187422
reference mB
fitting (BV+V)+b1+b2*XB+b3*BV+b4*BV*XB
weights photometric
parameters 4
b1 (constant)
b2 (fit)
b3 (constant)
b4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
3.668
0.2268837
-0.0274
0.
errors 4
0.
0.005712632
0.
0.
# Wed 09:42:06 05-Jun-2002
begin VFIT
status 0 (Solution converged)
variance 0.001750071
stdeviation 0.04183385
avsqerror 0.002313507
averror 0.04809893
avsqscatter 0.001546741
avscatter 0.03932863
chisqr 0.756458
msq 0.001680068
rms 0.04098863
reference mV
fitting V+v1+v2*XV+v3*BV+v4*BV*XV
weights photometric
parameters 4
v1 (constant)
v2 (fit)
v3 (constant)
v4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
3.246
0.1149137
-0.0167
0.
errors 4
0.
0.006344703
0.
0.
