d50_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---1.33, 1.23, 1.25
Integration time (s)---1800, 2400, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Wed 14:13:01 29-May-2002
begin BFIT
status 0 (Solution converged)
variance 1.494586E-4
stdeviation 0.01222533
avsqerror 1.560404E-4
averror 0.01249161
avsqscatter 6.004668E-5
avscatter 0.007748979
chisqr 0.9578196
msq 1.429604E-4
rms 0.0119566
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
3.443
0.2235634
-0.0187
0.
errors 4
0.
0.001561286
0.
0.
# Wed 14:13:31 29-May-2002
begin VFIT
status 0 (Solution converged)
variance 2.718539E-4
stdeviation 0.01648799
avsqerror 3.494839E-4
averror 0.01869449
avsqscatter 1.184234E-4
avscatter 0.01088225
chisqr 0.7778723
msq 2.582612E-4
rms 0.01607051
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
3.122
0.1285986
-0.0159
0.
errors 4
0.
0.002098214
0.
0.
# Thu 11:50:02 11-Jul-2002
begin UFIT
status 0 (Solution converged)
variance 0.004286912
stdeviation 0.06547451
avsqerror 0.004285706
averror 0.06546531
avsqscatter 0.003317559
avscatter 0.05759826
chisqr 1.000281
msq 0.004224783
rms 0.06499833
reference mU
fitting (UB+BV+V)+u1+u2*XU+u3*BV+u4*UB*XU
weights photometric
parameters 4
u1 (fit)
u2 (constant)
u3 (constant)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
5.251
0.459
-0.121
0.
errors 4
0.003
0.
0.
0.
