wlm_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---1.60, 1.66, 1.57
Integration time (s)---2400, 2400, 1200
Pixel scale (arcsec)---1.134, 1.134, 1.134

# Wed 09:51:06 29-May-2002
begin UFIT
status 0 (Solution converged)
variance 0.002807827
stdeviation 0.05298893
avsqerror 0.004408114
averror 0.06639363
avsqscatter 0.001309995
avscatter 0.03619386
chisqr 0.6369677
msq 0.002711005
rms 0.05206731
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
5.04
0.463949
-0.112
0.
errors 4
0.
0.005936652
0.
0.

# Wed 09:51:38 29-May-2002
begin BFIT
status 0 (Solution converged)
variance 7.376013E-4
stdeviation 0.02715882
avsqerror 9.027324E-4
averror 0.03004551
avsqscatter 2.369830E-4
avscatter 0.01539425
chisqr 0.8170763
msq 7.121667E-4
rms 0.02668645
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
3.388
0.2456194
-0.0237
0.
errors 4
0.
0.002651105
0.
0.

# Wed 09:52:10 29-May-2002
begin VFIT
status 0 (Solution converged)
variance 4.553543E-4
stdeviation 0.02133903
avsqerror 6.226407E-4
averror 0.02495277
avsqscatter 1.746930E-4
avscatter 0.01321715
chisqr 0.7313276
msq 4.406655E-4
rms 0.02099203
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
3.082
0.1349849
-0.0157
0.
errors 4
0.
0.002211011
0.
0.

# Fri 12:04:18 08-Nov-2002
begin UFIT
status 0 (Solution converged)
variance 0.003893676
stdeviation 0.06239933
avsqerror 0.003891669
averror 0.06238325
avsqscatter 0.003243723
avscatter 0.05695369
chisqr 1.000516
msq 0.00385269
rms 0.06207004
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
5.3269
0.423
-0.0687
0.
errors 4
0.002
0.
0.
0.

Connect with NRAO

The NSF National Radio Astronomy Observatory and NSF Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NSF NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NSF NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NSF NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NSF NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The U.S. National Science Foundation (U.S. NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.