STIS Instrument Filters
STIS/CCD FILTERS
| Name |
Filter |
Central Wavelength (Å) |
FWHM (Å) |
Field of View (arcsec2) |
| plate scale 0.05071 ± 0.00007 arcseconds
per pixel |
| 50CCD1 |
Clear |
5850 |
4410 |
52 x 52 |
| F28X50LP1 |
longpass > 5500 Å |
7230 |
2720 |
28 x 52 |
| F28X50OIII2 |
[O III] |
5007 |
5 |
28 x 52 |
| F28X50OII |
[O II] |
3740 |
80 |
28 x 52 |
| 50CORON3 |
Clear + Coronagraphic fingers |
5850 |
4410 |
Special |
1red halo, 2red leak, 3The
50CORON aperture is an unfiltered aperture with a number of occulting bars and wedges
which functions as a
coronagraphic
mask. A number of separate
aperture
positions have been defined for use within 50CORON, ad may be individually
specified in Phase 2 proposals.
STIS/NUV MAMA FILTERS
Aperture Name |
Filter |
Central Wavelength (Å) |
FWHM (Å) |
Field of View (arcsec2) |
| plate scale ~0.0248 arcseconds per pixel |
| 25MAMA
4 |
Clear |
2220 |
1200 |
25 x 25 |
| F25QTZ
5 |
longpass > 1475 Å |
2320 |
1010 |
25 x 25 |
| F25SRF26 |
longpass > 1275 Å |
2270 |
1110 |
25 x 25 |
| F25MGII |
Mg II |
2800 |
70 |
25 x 25 |
| F25CN270 |
~2700 Å Continuum |
2700 |
350 |
25 x 25 |
| F25CIII |
[C III] |
1909 |
70 |
25 x 25 |
| F25CN182 |
~1800 Å Continuum |
1820 |
350 |
25 x 25 |
| F25ND3 |
ND=10-3 |
2344 |
1345 |
25 x 25 |
| F25ND5 |
ND=5 x 10-6 |
2621 |
1515 |
25 x 25 |
F25NDQ1
F25NDQ2
F25NDQ3
F25NDQ4
|
ND=10-1
ND=10-2
ND=10-3
ND=10-4
|
2277
2318
2417
2450
|
1126
1036
756
607
|
~12 x 12
~12 x 12
~12 x 12
~12 x 12
|
STIS/FUV MAMA FILTERS
Aperture Name |
Filter |
Central Wavelength (Å) |
FWHM (Å) |
Field of View (arcsec2) |
| plate scale ~0.0248 arcseconds per pixel |
| 25MAMA
7 |
Clear |
1370 |
320 |
25 x 25 |
| F25QTZ
5 |
longpass > 1475 Å |
1590 |
220 |
25 x 25 |
| F25SRF2
6 |
longpass > 1275 Å |
1480 |
280 |
25 x 25 |
| F25LYA
8 |
Ly-alpha |
1216 |
85 |
25 x 25 |
| F25ND3 |
ND=10-3 |
1376 |
316 |
25 x 25 |
| F25ND5 |
ND=7 x 10-7 |
1385 |
336 |
25 x 25> |
F25NDQ1
F25NDQ2
F25NDQ3
F25NDQ4
|
ND=10-1
ND=10-2
ND=10-3
ND=10-4 |
1416
1404
1407
1437
|
384
384
401
391
|
~12 x 12
~12 x 12
~12 x 12
~12 x 12
|
4not well focused, 5excludes O I 1302,
6excludes Ly-alpha, 7high airglow,
8low throughput
Note that MAMA imaging observations are subject to especially strict
bright object
limits, and will not be performed unless ALL objects in or near the aperture can
be shown to be below these limits.
As STIS filters are located in the STIS slit wheel they must be listed as apertures
in Phase II proposals and cannot be used in combination
with other apertures. The STIS filters can, however, be used
together with a grating to do filtered
slitless first order
spectroscopy. This can be especially useful when it is necessary to exclude
contamination due to geocoronal lines.
STIS has a relatively limited set of filters. However its
imaging capabilities
do include some unique advantages that make it worth considering as an
alternative to WFPC2 or ACS for some
UV and
optical imaging
projects.
Comparisons of Imaging Mode Throughputs:
CCD,
FUV-MAMA
and
NUV-MAMA Clear and Filtered Throughputs
STIS CCD Clear
vs. WFPC2
STIS vs. ACS
Imaging
Color Corrections
from Johnson V to AB Magnitude
Choosing a filter for imaging observations or slitless spectroscopy:
CCD Ghosts
and Reflections
CCD Red
Light Halo
Filter Choice for
Target ACQ Observations
Other Caveats
for STIS Imaging
MAMA Longpass
Filters and Geocoronal Lines
MAMA Imaging
Bright Object Limits
STIS Imaging, Spectroscopic, and Target ACQ ETCs
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