lgs3_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---1.04, 1.11, 1.46
Integration time (s)---2400, 2400, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Wed 14:13:31 29-May-2002
begin VFIT
status 0 (Solution converged)
variance 2.718539E-4
stdeviation 0.01648799
avsqerror 3.494839E-4
averror 0.01869449
avsqscatter 1.184234E-4
avscatter 0.01088225
chisqr 0.7778723
msq 2.582612E-4
rms 0.01607051
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
3.122
0.1285986
-0.0159
0.
errors 4
0.
0.002098214
0.
0.
# Fri 16:32:08 31-May-2002
begin BFIT
status 0 (Solution converged)
variance 3.962124E-4
stdeviation 0.01990508
avsqerror 3.988900E-4
averror 0.01997223
avsqscatter 1.932560E-4
avscatter 0.01390165
chisqr 0.9932874
msq 3.860531E-4
rms 0.01964824
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
3.652
0.284154
-0.0153
0.
errors 4
0.
0.002054963
0.
0.
# Thu 10:51:37 11-Jul-2002
begin UFIT
status 0 (Solution converged)
variance 0.002457423
stdeviation 0.0495724
avsqerror 0.00245627
averror 0.04956077
avsqscatter 0.001893266
avscatter 0.04351167
chisqr 1.000469
msq 0.002308488
rms 0.04804673
reference mU
fitting (UB+BV+V)+u1+u2*XU+u3*BV+u4*UB*XU
weights photometric
parameters 4
u1 (fit)
u2 (constant)
u3 (fit)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
5.075891
0.686
-0.1758558
0.
errors 4
0.01318199
0.
0.01666166
0.
