d216_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---1.09, 1.25, 1.37
Integration time (s)---1800, 480, 180
Pixel scale (arcsec)---0.42, 0.42, 0.42

# Fri 14:06:08 10-May-2002
begin UFIT
status 0 (Solution converged)
variance 0.001998436
stdeviation 0.04470387
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 0.001998436
msq 0.001870876
rms 0.04325363
reference mU
fitting (UB+BV+V)+u1+u2*XU+u3*UB+u4*UB*XU
weights uniform
parameters 4
u1 (fit)
u2 (fit)
u3 (fit)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
1.336326
0.5622226
-0.1036324
0.
errors 4
0.06752726
0.05396826
0.01200154
0.

# Fri 14:07:16 10-May-2002
begin BFIT
status 0 (Solution converged)
variance 1.140663E-4
stdeviation 0.01068018
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 1.140663E-4
msq 9.695632E-5
rms 0.00984664
reference mB
fitting (BV+V)+b1+b2*XB+b3*BV+b4*BV*XB
weights uniform
parameters 4
b1 (fit)
b2 (fit)
b3 (fit)
b4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
-0.2246805
0.2901735
-0.03218131
0.
errors 4
0.02321666
0.01711643
0.007003371
0.

# Fri 14:08:16 10-May-2002
begin VFIT
status 0 (Solution converged)
variance 1.785183E-4
stdeviation 0.01336107
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 1.785183E-4
msq 1.487653E-4
rms 0.01219694
reference mV
fitting V+v1+v2*XV+v3*BV+v4*BV*XV
weights uniform
parameters 4
v1 (fit)
v2 (fit)
v3 (fit)
v4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
-0.3788421
0.2121398
0.001862769
0.
errors 4
0.02861157
0.02103328
0.009731187
0.