Science > Surveys > Little Things > Data > mrk178 > mrk178_ubvcalib.txt

mrk178_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---1.06, 1.03, 1.02
Integration time (s)---1000, 900, 600
Pixel scale (arcsec)---0.61, 0.61, 0.61

# Wed 09:34:34 15-May-2002
begin UFIT
status 0 (Solution converged)
variance 0.004595971
stdeviation 0.06779359
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 0.004595971
msq 0.00434064
rms 0.06588353
reference mU
fitting (UB+BV+V)+u1+u2*XU+u3*UB+u4*UB*XU
weights uniform
parameters 4
u1 (constant)
u2 (fit)
u3 (constant)
u4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
3.517
0.4119617
-0.0923
0.
errors 4
0.
0.008613604
0.
0.

# Wed 09:34:47 15-May-2002
begin BFIT
status 0 (Solution converged)
variance 6.823423E-4
stdeviation 0.02612168
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 6.823423E-4
msq 6.539114E-4
rms 0.02557169
reference mB
fitting (BV+V)+b1+b2*XB+b3*BV+b4*BV*XB
weights uniform
parameters 4
b1 (constant)
b2 (fit)
b3 (constant)
b4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
1.706
0.2600327
0.0255
0.
errors 4
0.
0.003005073
0.
0.

# Wed 09:35:03 15-May-2002
begin VFIT
status 0 (Solution converged)
variance 1.148043E-4
stdeviation 0.01071468
avsqerror 1.
averror 1.
avsqscatter 0.
avscatter 0.
chisqr 1.148043E-4
msq 1.098128E-4
rms 0.01047916
reference mV
fitting V+v1+v2*XV+v3*BV+v4*BV*XV
weights uniform
parameters 4
v1 (constant)
v2 (fit)
v3 (constant)
v4 (constant)
derivatives 4
0.1
0.1
0.1
0.1
values 4
1.542
0.1254764
-0.003
0.
errors 4
0.
0.001274713
0.
0.