d168_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---1.40, 1.09, 1.08
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Thu 15:08:01 30-May-2002
begin BFIT
status 0 (Solution converged)
variance 0.001936667
stdeviation 0.04400757
avsqerror 0.002694207
averror 0.05190575
avsqscatter 9.749284E-4
avscatter 0.03122384
chisqr 0.7188261
msq 0.001852464
rms 0.04304026
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
3.445
0.2373955
-0.022
0.
errors 4
0.
0.004757675
0.
0.
# Thu 15:15:01 30-May-2002
begin VFIT
status 0 (Solution converged)
variance 5.933754E-4
stdeviation 0.0243593
avsqerror 5.916241E-4
averror 0.02432332
avsqscatter 3.546218E-4
avscatter 0.0188314
chisqr 1.00296
msq 5.777603E-4
rms 0.02403664
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
3.017
0.1511767
0.045
0.
errors 4
0.
0.002345854
0.
0.
# Thu 14:41:09 11-Jul-2002
begin UFIT
status 0 (Solution converged)
variance 0.003643455
stdeviation 0.06036104
avsqerror 0.003641509
averror 0.06034491
avsqscatter 0.002788662
avscatter 0.05280778
chisqr 1.000534
msq 0.00355459
rms 0.05962038
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
5.065
0.515
-0.146
0.
errors 4
0.006
0.
0.
0.
