n3738_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---1.08, 1.06, 1.07
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Thu 15:09:26 30-May-2002
begin BFIT
status 0 (Solution converged)
variance 4.731225E-4
stdeviation 0.02175138
avsqerror 4.716113E-4
averror 0.02171661
avsqscatter 2.930113E-4
avscatter 0.01711757
chisqr 1.003204
msq 4.336956E-4
rms 0.02082536
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
0.2522084
-0.022
0.
errors 4
0.
0.003991939
0.
0.
# Thu 15:09:48 30-May-2002
begin VFIT
status 0 (Solution converged)
variance 3.186176E-4
stdeviation 0.01784986
avsqerror 3.344381E-4
averror 0.01828765
avsqscatter 1.270007E-4
avscatter 0.01126946
chisqr 0.9526951
msq 2.958592E-4
rms 0.01720056
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
0.137418
0.045
0.
errors 4
0.
0.002664746
0.
0.
# Thu 11:03:34 06-Jun-2002
begin UFIT
status 0 (Solution converged)
variance 0.002012777
stdeviation 0.04486399
avsqerror 0.002012014
averror 0.04485548
avsqscatter 0.001132588
avscatter 0.03365395
chisqr 1.000379
msq 0.001925265
rms 0.04387784
reference m1
fitting (UB+BV+V)+u1+u2*X1+u3*BV+u4*BV*X1
weights photometric
parameters 4
u1 (fit)
u2 (constant)
u3 (constant)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
5.285
0.598
-0.177
0.
errors 4
0.003
0.
0.
0.
