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SPACETELESCOPESCIENCEINSTITUTE
TIPS
Meeting
22
June
1995
W.
Hack
Summary
of
FOC
Activities
for
the
period
25
May
­
20
June
1995
Operations .
The
F/96
relay
has
been
operating
nominally.
Proposals
Executed
.
4
GO/GTO
proposals
were
executed
with
the
FOC:
.
5140
Observations
of
the
Narrow
Line
Regions
in
Nearby
Seyfert
Galaxies
5148
A
Search
for
Massive
Stars
in
Giant
HII
Regions
in
M31
5301
Structure
and
Populations
of
Globular
Clusters
5708
Bulge
Stellar
Populations
in
S0
Galaxies
.
There
were
3
ENG/CAL
proposals
executed
with
the
FOC:
5522
FOC
Post­COSTAR
Polarization
Calibration
(re­run
2x)
5526
FOC
UV
Throughput
Monitoring
5762
FOC
Point­Spread
Function
Monitoring

SPACETELESCOPESCIENCEINSTITUTE
TIPS
Meeting
22
June
1995
W.
Hack
Summary
of
FOC
Activities
for
the
period
25
May
­
20
June
1995
FOC
Filter
Shifts
FOC
calibration
data
taken
to
study
FOC
absolute
sensitivity
was
analyzed
to
look
for
image
shifts
produced
by
the
filters.
Large
filter
shifts
were
known
for
the
F320W
filter
(reported
in
the
Instrument
Handbook)
and
for
polarizer
filters
(reported
in
a
draft
ISR
on
the
polarizer
throughputs).
Questions
brought
up
by
a
GO
and
by
recent
prism
calibration
efforts
spurred
the
analysis
to
quantify
any
image
shifts
produced
by
FOC
filters.
Relative
to
the
F120M
filter,
9
FOC
F/96
filters
were
found
to
have
shifts
of
~0.08''
(6
pix­
els)
or
more
with
errors
of
+/­
1pixel.
Several
other
filters
showed
smaller
shifts
as
well.
The
exact
shifts
for
nearly
all
the
F/96
filters
will
be
posted
on
the
FOC
WWW
pages
as
soon
as
they
are
compiled.
The
neutral
density
filters
F1ND,
F2ND,
F4ND,
and
F6ND
did
not
show
any
significant
image
shifts
(shifts
<
1
pixel).

SPACETELESCOPESCIENCEINSTITUTE
TIPS
Meeting
22
June
1995
W.
Hack
Summary
of
FOC
Activities
for
the
period
25
May
­
20
June
1995
Table
1:
Image
Shifts
by
FOC
F/96
Filters
Relative
to
F120M
Position
Filter
X
shift
Y
shift
F320W
(known
before)
­73
47
F346M
­6
6
F372M
­4
6
F410M
­11
16
F430W
1
7
F486N
­6
16
F501N
11
1
F502M
0
­6
F600M
24
11

SPACETELESCOPESCIENCEINSTITUTE
TIPS
Meeting
22
June
1995
W.
Hack
Summary
of
FOC
Activities
for
the
period
25
May
­
20
June
1995
FOC
UV
Sensitivity
New
observations
were
taken
with
the
far­UV
filters
that
are
used
to
monitor
the
FOC
UV
sensitivity;
namely,
the
F120M,
F140M,
F170M
and
F210M
filters.
The
addition
of
the
lat­
est
points
to
the
previous
trending
analysis
eliminates
the
(barely
significant)
trend
seen
previously,
leading
to
the
conclusion
that
the
FOC
UV
sensitivity
has
remained
stable
since
launch.

SPACETELESCOPESCIENCEINSTITUTE
TIPS
Meeting
22
June
1995
W.
Hack
Summary
of
FOC
Activities
for
the
period
25
May
­
20
June
1995