d133_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---1.15, 1.0, 1.035
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Wed 09:35:54 05-Jun-2002
begin BFIT
status 0 (Solution converged)
variance 0.002002119
stdeviation 0.04474504
avsqerror 0.002000273
averror 0.04472441
avsqscatter 0.0011534
avscatter 0.03396175
chisqr 1.000923
msq 0.00193308
rms 0.04396681
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
0.2104808
-0.0274
0.
errors 4
0.
0.00467914
0.
0.
# Wed 09:36:55 05-Jun-2002
begin VFIT
status 0 (Solution converged)
variance 1.818566E-4
stdeviation 0.01348542
avsqerror 2.323986E-4
averror 0.01524463
avsqscatter 5.603344E-5
avscatter 0.007485548
chisqr 0.7825202
msq 1.766607E-4
rms 0.01329138
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
0.1009549
-0.0167
0.
errors 4
0.
0.001344116
0.
0.
# Wed 09:44:32 05-Jun-2002
begin UFIT
status 0 (Solution converged)
variance 0.001953959
stdeviation 0.04420361
avsqerror 0.00195244
averror 0.04418642
avsqscatter 0.001760506
avscatter 0.04195839
chisqr 1.000778
msq 0.001878807
rms 0.04334521
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
0.4756422
-0.0911
0.
errors 4
0.
0.005368493
0.
0.
