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Effects of Non-simultaneous MIPS and IRAC Observations
click for full-size image
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Illustration of effects of non-simultaneous MIPS/IRAC maps along
longitudinal strips. This plot also illustrates the different
orientations and areas that may be covered by the FLS observations of
L1228. The time difference is from the first day of the time window
during which the FLS could be observed (Nov 30) to the last day of this
window (Dec 15). For this reason we have requested follow on constraints
for the IRAC and MIPS maps of only 3 days (for the molecular cloud). [For
the galactic longitude strips, we have requested that the observations be
taken within 4 days.]
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Galactic Longitudinal Strip l = 254.4
click for full-size image
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IRAS 100 micron images with MIPS footprints overlaid for an observation
date of 2003 Dec 15. Latitude spacing increases with increasing latitude.
MIPS and IRAC observations are comparable. The MIPS footprints are longer
that the targeted 1 degree area due to overscan. The maximum area seen by
all detectors will in fact be only 1d.
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Table 1: l=254.4 Strip Centers
| Map Position |
l (deg) |
b (deg) |
IRAC (sec) |
MIPS(sec) |
| 1 |
254.4 |
0.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 2 |
254.4 |
-2.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 3 |
254.4 |
-5.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 4 |
254.4 |
-9.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 5 |
254.4 |
-14.0 |
48/48/48/48 |
15.7/15.7/3.1 |
Galactic Longitudinal Strip l = 105.6
click for full-size image
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IRAS 100 micron images with MIPS footprints overlaid for an observation
date of 2003 Dec 15. Latitude spacing increases with increasing latitude.
MIPS and IRAC observations are comparable. The MIPS footprints are longer
that the targeted 1 degree area due to overscan. The maximum area seen by
all detectors will in fact be only 1d.
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Table 2: l=105.6 Strip Centers
| Map Position |
l (deg) |
b (deg) |
IRAC (sec) |
MIPS(sec) |
| 1 |
105.6 |
-1.3 |
48/48/48/48 |
15.7/15.7/3.1 |
| 2 |
105.6 |
+0.35 |
48/48/48/48 |
15.7/15.7/3.1 |
| 3 |
105.6 |
+2.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 4 |
105.6 |
+4.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 5 |
105.6 |
+8.0 |
48/48/48/48 |
15.7/15.7/3.1 |
| 6 |
105.6 |
+16.0 |
48/48/48/48 |
15.7/15.7/3.1 |
Galactic Cirrus
Coming eventually : figure of the predicted 160 micron
data.
Table 3: Galactic Cirrus Position
| Map |
l |
b |
Integration Time |
| IRAC |
105.6 |
+32 |
48/48/48/48 |
| MIPS |
105.6 |
+32 |
41.9/41.9/4.2 |
Galactic Longitudinal Strip IRAC only l = 97.5
click for full-size image
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IRAS 12 micron images with IRAC footprints overlaid for an observation
date of 2003 Dec 15. These IRAC-only observations are designed to assess
star counts.
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Table 4: IRAC-only positions at l=97.5
| Map |
l |
b |
Integration Time |
| IRAC |
97.5 |
+4 |
48/48/48/48 |
| IRAC |
97.5 |
-4 |
48/48/48/48 |
| IRAC |
97.5 |
+0 |
48/48/48/48 |
| IRAC |
97.5 |
+16 |
48/48/48/48 |
L1228 Molecular Cloud
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Click either image for larger high-resolution images.
Spitzer
IRAC maps (cyan and magenta overlays) and MIPS scans (pink, blue, green
overlays) shown overlayed on IRAS 100 micron maps.
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- ~ 2 degree scan/maps across the cloud center and extending to lower
emission regions.
- Maps oriented across the cloud center but exact angle dependent upon
observation date.
Table 5: L1228 Cloud Maps
| Map |
RA (J2000) |
DEC (J2000) |
Integration Time |
| IRAC |
20h57m11.81s |
+77d35m47.91s |
48/48/48/48 |
| MIPS |
20h57m11.81s |
+77d35m47.91s |
15.7/15.7/3.1 |
Go back to Galactic FLS page or
main FLS page.
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