Science > Surveys > Little Things > Data > ddo187 > d187_ubvcalib.txt

d187_ubvcalib.txt

by Tracy Halstead last modified Jan 11, 2012

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---1.21, 1.1, 1.02
Integration time (s)---1800, 1800, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134

# Thu 17:20:41 30-May-2002
begin BFIT
status 0 (Solution converged)
variance 4.372309E-4
stdeviation 0.02091007
avsqerror 4.372054E-4
averror 0.02090946
avsqscatter 2.408567E-4
avscatter 0.01551956
chisqr 1.000058
msq 4.254139E-4
rms 0.02062557
reference m1
fitting (BV+V)+b1+b2*X1+b3*BV+b4*BV*X1
weights photometric
parameters 4
b1 (constant)
b2 (fit)
b3 (constant)
b4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
3.434
0.3580121
-0.0157
0.
errors 4
0.
0.002294579
0.
0.

# Thu 17:21:33 30-May-2002
begin VFIT
status 0 (Solution converged)
variance 4.425460E-4
stdeviation 0.02103678
avsqerror 4.413327E-4
averror 0.02100792
avsqscatter 2.547749E-4
avscatter 0.01596167
chisqr 1.002749
msq 4.311987E-4
rms 0.02076532
reference m2
fitting V+v1+v2*X2+v3*BV+v4*BV*X2
weights photometric
parameters 4
v1 (constant)
v2 (fit)
v3 (constant)
v4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
3.009
0.2203408
0.0415
0.
errors 4
0.
0.002178262
0.
0.

# Thu 14:43:04 11-Jul-2002
begin UFIT
status 0 (Solution converged)
variance 0.003427509
stdeviation 0.05854493
avsqerror 0.00342573
averror 0.05852973
avsqscatter 0.002963565
avscatter 0.05443863
chisqr 1.000519
msq 0.00332958
rms 0.05770252
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
5.065
0.562
-0.146
0.
errors 4
0.006
0.
0.
0.