Science > Surveys > Little Things > Data > ngc2366 > n2366_ubvcalib.txt

n2366_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---1.32, 1.26, 1.25
Integration time (s)---1800, 480, 180
Pixel scale (arcsec)---0.42, 0.42, 0.42

# Mon 11:07:29 13-May-2002
begin UFIT
status 0 (Solution converged)
variance 3.194103E-4
stdeviation 0.01787205
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 3.194103E-4
msq 2.129402E-4
rms 0.01459247
reference mU
fitting (UB+BV+V)+u1+u2*XU+u3*UB+u4*UB*XU
weights uniform
parameters 4
u1 (fit)
u2 (fit)
u3 (fit)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
1.679049
0.3572555
-0.0400845
0.
errors 4
0.1001485
0.08258455
0.01287872
0.

# Mon 11:08:08 13-May-2002
begin BFIT
status 0 (Solution converged)
variance 1.984439E-4
stdeviation 0.01408701
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 1.984439E-4
msq 9.922194E-5
rms 0.009961021
reference mB
fitting (BV+V)+b1+b2*XB+b3*BV+b4*BV*XB
weights uniform
parameters 4
b1 (fit)
b2 (fit)
b3 (fit)
b4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
-0.0829096
0.2040792
-0.005089185
0.
errors 4
0.07697853
0.0647294
0.02438456
0.

# Mon 11:08:45 13-May-2002
begin VFIT
status 0 (Solution converged)
variance 2.632159E-4
stdeviation 0.01622393
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 2.632159E-4
msq 1.754772E-4
rms 0.01324678
reference mV
fitting V+v1+v2*XV+v3*BV+v4*BV*XV
weights uniform
parameters 4
v1 (fit)
v2 (fit)
v3 (fit)
v4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
-0.3681273
0.2220466
0.0130948
0.
errors 4
0.08020329
0.06855157
0.02642367
0.