Time dependent calibration factors, γ(=αβ) and α, for all three LIGO
IFOs are calculated
for the first epoch (V1) of the S5 data, by using the S5V1 frequency
domain calibration. This epoch covers the duration up to the gps time
824791239 (04:40:25UTC, Feb. 24, 2006) from the beginning of the S5
run. This is the second release of calibration factors, which
includes
the first release. Scripts used
are
GetFactorV1.m and
WriteFactorFiles.m. Input files
for these scripts are available on the clusters - LLO (
mout,
dat)
and LHO (
mout,
dat).
DQ flag lists are also generated for each factor IFO. These lists are
produced for the online segment list
(
L1,
H1,
H2)
of the science mode ONLY although calibration factors are obtained
based on the list of conlog UpTime longer than 60 seconds. Factor
values outside the physical
boundary, which is given below from
the V1 calibration model, are zeroed out and included in the DQ lists.
The DQ lists also include
the outliers near the end of science
mode which are shown as red dots in each time dependence plots.
Time dependences of αβ (γ) and α with non-zero
values are shown in the
plots for science mode segments only. Red dots with zero γ values
in those plots are out of the
physically allowed region, so set to be zero. Red data points with
non-zero γ values are the outliers at
the beginning or end of science modes. Histograms of calibration
factors and other related plots are given as
links
below each plot.
A whitening filter was added to the DARM_CTRL channel on Jan. 31, 2006 (
LHO,
LLO).
In the factor calculation, the dewhitening filter was applied to the
channel to correct the
whitening
filter effect on the calibration.
