d46_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---1.3, 1.0, 1.02
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Thu 15:11:57 30-May-2002
begin BFIT
status 0 (Solution converged)
variance 8.922030E-4
stdeviation 0.02986977
avsqerror 8.909081E-4
averror 0.02984808
avsqscatter 6.125225E-4
avscatter 0.02474919
chisqr 1.001453
msq 8.497171E-4
rms 0.02914991
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
0.2701167
-0.022
0.
errors 4
0.
0.00365938
0.
0.
# Thu 15:12:28 30-May-2002
begin VFIT
status 0 (Solution converged)
variance 3.749936E-4
stdeviation 0.01936475
avsqerror 3.736763E-4
averror 0.01933071
avsqscatter 1.557280E-4
avscatter 0.0124791
chisqr 1.003525
msq 3.620628E-4
rms 0.01902795
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
0.1593955
0.045
0.
errors 4
0.
0.001785195
0.
0.
# Thu 11:48:45 11-Jul-2002
begin UFIT
status 0 (Solution converged)
variance 0.005657332
stdeviation 0.07521524
avsqerror 0.005655774
averror 0.07520488
avsqscatter 0.005097186
avscatter 0.07139458
chisqr 1.000275
msq 0.005468755
rms 0.07395103
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
0.444
-0.121
0.
errors 4
0.003
0.
0.
0.
