Science > Surveys > Little Things > Data > ddo154 > d154_ubvcalib.txt

d154_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---1.16, 1.49, 1.11
Integration time (s)---1800, 1200, 600
Pixel scale (arcsec)---1.134, 1.134, 1.134

# Tue 08:16:17 18-Jun-2002
begin UFIT
status 0 (Solution converged)
variance 0.003666018
stdeviation 0.06054765
avsqerror 0.0036644
averror 0.06053429
avsqscatter 0.002292743
avscatter 0.04788259
chisqr 1.000442
msq 0.003580763
rms 0.05983947
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
5.196
0.4683865
-0.093
0.
errors 4
0.
0.005730249
0.
0.

# Tue 08:16:55 18-Jun-2002
begin BFIT
status 0 (Solution converged)
variance 6.539484E-4
stdeviation 0.02557242
avsqerror 6.517855E-4
averror 0.02553009
avsqscatter 2.973674E-4
avscatter 0.01724434
chisqr 1.003318
msq 6.390859E-4
rms 0.02528015
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
3.562
0.2586217
-0.0166
0.
errors 4
0.
0.002193695
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.