d47_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---1.25, 1.06, 1.17
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134
# Thu 15:05:41 30-May-2002
begin BFIT
status 0 (Solution converged)
variance 3.136018E-4
stdeviation 0.01770881
avsqerror 3.120925E-4
averror 0.01766614
avsqscatter 1.273389E-4
avscatter 0.01128445
chisqr 1.004836
msq 3.053492E-4
rms 0.01747424
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
0.2458613
-0.022
0.
errors 4
0.
0.001528249
0.
0.
# Thu 15:06:44 30-May-2002
begin VFIT
status 0 (Solution converged)
variance 3.555940E-4
stdeviation 0.0188572
avsqerror 3.599697E-4
averror 0.01897287
avsqscatter 1.463815E-4
avscatter 0.01209882
chisqr 0.9878443
msq 3.469210E-4
rms 0.01862581
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
0.128904
0.045
0.
errors 4
0.
0.001483865
0.
0.
# Thu 13:27:34 11-Jul-2002
begin UFIT
status 0 (Solution converged)
variance 0.003931091
stdeviation 0.06269842
avsqerror 0.003929554
averror 0.06268615
avsqscatter 0.00372847
avscatter 0.0610612
chisqr 1.000391
msq 0.003743897
rms 0.06118739
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
5.267
0.472
-0.125
0.
errors 4
0.01
0.
0.
0.
