cvnidwa_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 CVnIdwA images, the average parameters for UBV are
the following:
Airmass---1.36, 1.47, and 1.27
Integration time (s)---1800, 900, 600
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Fri 09:17:55 07-Jun-2002
begin UFIT
status 0 (Solution converged)
variance 0.001494522
stdeviation 0.03865904
avsqerror 0.001492716
averror 0.03863568
avsqscatter 0.001123625
avscatter 0.03352052
chisqr 1.00121
msq 0.001444704
rms 0.03800927
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
5.318
0.4418046
-0.0926
0.
errors 4
0.
0.005308605
0.
0.
# Fri 09:18:30 07-Jun-2002
begin BFIT
status 0 (Solution converged)
variance 7.801763E-4
stdeviation 0.02793164
avsqerror 9.297029E-4
averror 0.03049103
avsqscatter 3.871530E-4
avscatter 0.0196762
chisqr 0.8391673
msq 7.578855E-4
rms 0.02752972
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
3.688
0.2321994
-0.012
0.
errors 4
0.
0.003007926
0.
0.
# Fri 09:18:54 07-Jun-2002
begin VFIT
status 0 (Solution converged)
variance 3.488368E-4
stdeviation 0.01867717
avsqerror 3.607810E-4
averror 0.01899424
avsqscatter 1.114133E-4
avscatter 0.01055525
chisqr 0.9668934
msq 3.382660E-4
rms 0.01839201
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
3.244
0.1523076
-0.0131
0.
errors 4
0.
0.001815982
0.
0.
