There is a problem w/ your write-up. Check that you have valied entries for \$CAID and \$Campn in your analysis.php file. If that checks out, then Contact Stansberry"; return ; } // get first matching task $row = mysql_fetch_array($result); $title = $row["title"]; $princ = $row["principal"]; $deputy= $row["deputy"]; $campn0 = $row["campn0"]; $aorkeys = $row["aorkeys"]; // get real name of principal, deputies $princ = ioc_get_person($princ); $princ = $princ[0]; $deps = explode(",",$deputy); foreach ($deps as $depty) { $depty = trim($depty); $depty = ioc_get_person($depty); $depty = $depty[0]; $depty = explode(",",$depty); $depty = $depty[0]; // last names only $deplist[] = $depty; } $deplist = implode(", ", $deplist); $caid = sprintf("%03d",$caid); $file = "mips-".$caid.$campn.".analysis.php"; // if more matches, append the AORKEYS from those $numrows = mysql_num_rows($result); if ($numrows > 1) { $aorkeys = " " . $numrows . " Task Executions:  ". $aorkeys; for ($i=0;$i < mysql_num_rows($result); $i++) { $row = mysql_fetch_array($result); $morekeys = $row["aorkeys"]; $aorkeys = $aorkeys .';  '.$morekeys; } } // END PHP. ?> <? echo "MIPS-$caid, Campaign $campn IOC/SV Analysis"; ?>

Principal:
Deputy:
Analyst:
AORKEYS:
Last Updated:

Task Outcome Summary

Abstract

This tasks aims at studying the saturation at 70 and 160, in medium scan and 3 and 10s photometry.
1) In 3s photometry: no saturation at 70; saturation observed at 160 in 5/6 sources.
2) In medium scans (4s): no saturation at 70; saturation observed at 160, in differnt reads in forward/return legs.
3) In 10s photometry: no saturation at 70; saturation observed at 160 in all 6 sources.
Strong saturation generates a decay, lasting about 20 seconds in the worst case at 160.
Saturation level is larger than 10.3 Jy in 3s at 70 microns (lower limit), which is at least 3 times
larger than UofA predictions (4.4 Jy), and at least 8 times larger than SSC predictions (1.3 Jy). At 160, the latency has an amplitude at teh order of 4% of the saturating source.

Analysis

Processing
DAT version 2.50
at 70:
mips_sloper -n -l -q -j CamX1
mips_caler -C CamX1 -P mips_caler70.param
mips_enhancer -i AORKEY -s 1.0 -t 3.0 -x 2 -y 10 -dn -FD -OW -SC 3.0 -RR -SK -o mosaicA70_AORKEY

at 160:
mips_sloper -l -q -j CamX1
mips_caler -C CamX1 -P mips_caler160.param
mips_enhancer -i AORKEY -s 1.0 -t 3.0 -x 2 -y 10 -dn -FD -OW -SC 3.0 -RR -SK -o mosaicA160_AORKEY


Photometry 3s
Data are nominal, and FIR Ge:Ga mosaics of IRAS sources are beautiful.
At 160, pixel (2,2) was used.

Scan Maps 4s
Images of Scan Maps here (pretty pictures).
Because of a non redesign of the observations, the bright sources fall in the middle of the
70 micron array in the scan maps. We can nevertheless study the saturation, but is less confortable
than if the side A had seen the whole source. In this respect, the data collection at 70 is not perfect,
but useable.
At 160, pixel (9,2) was used.

Photometry 10s
Data are nominal, and FIR Ge:Ga mosaics of IRAS sources are beautiful.
At 160, pixel (2,2) was used.

Observed Sources with 3s (pht), 4s (scn) and 10s (pht) DCE each

Observed IRAS Sources for Saturation

IRAS
source

flux 60

factor
saturation
at 70

flux 100

factor
saturation
at 160

visibility

comment


(Jy) [*]
(Jy) [*]


18212+7432 10.3 3.1 31.78 4.5 CVZ v bright cold [source 1]
16577+5900 7.43 2.3 23.58 3.3 CVZ v bright cold [source 2]
16418+6540 3.45 1.1 7.37 1.6 CVZ bright cold [source 3]
F17069+6047 3.01 0.9 4.99 0.7 CVZ bright (less) cold [source 4]
F16460+5910 1.4 0.42 3.2 0.45 CVZ faint cold [source 5]
17403+6234 2.08 0.6 1.03 0.15 CVZ faint warm [source 6]
Table 1. OBSERVED IRAS Sources for this task.
[*] based on pre-launch expectations (see cookbook for mips-210). Is different from actual observations.
"cold" means cold source (rising spectrum),
"warm" mean warm source (decreasing spectrum).




Results

Read Number of Saturation, Observation of IRAS Sources

IRAS
source

flux 60

flux 100

Saturation 70

Saturation 160


(Jy) (Jy)
3s DCE 4s DCE
10s DCE
 3s DCE 4s(*) DCE
10s DCE
18212+7432 10.3 31.78 no sat no sat no sat 3 8 / 7 4
16577+5900 7.43 23.58 no sat no sat no sat 3 10 / 7 4
16418+6540 3.45 7.37 no sat no sat no sat 8 28 / 12 8 to 9
F17069+6047 3.01 4.99 no sat no sat no sat 13 no sat / 16 11 to 14
F16460+5910 1.4 3.2 no sat no sat no sat 12 to 20 no sat 15
17403+6234 2.08 1.03 no sat no sat no sat no sat no sat 20
Table 2. Read Number when Saturation occured.
When saturation occurs on read #3, no slope is derived. After, a slope can be measured.
(*) For 3s and 10s DCE, pixel (2,2) was used. For 4s, pixel (2,9) was used.
(*) when 2 values are indicated, they correspond to forward leg / return leg

70 microns
No saturation is observed. Even in the stim DCEs. The saturation level is thus way above the predictions.

160 microns
Saturation is observed as expected. A decay is observed in scan map mode (easier to see), and lasts for about 20 seconds. The following plot shows source 2 in scan map mode. We can extrapolate its flux at 160 of about ~15 to ~20 Jy. The latent fakes a source in this case of about 0.25 (in stims units).
Since the contribution of the decay after ~8 to 10 seconds corresponds to 60% (here 0.55 vs 0.3) of the background, and that this background is of 3.8 MJy/sr (spot 8.9) it mimics a source of 0.6*3.8e6*4.45e8 (3.8 MJy/sr converts into a flux of 3.8e6 / (solid angle of 160 PSF) (4.45e-8 sr see Dole et al 2003) Jy) 100 mJy.
On the other hand, a source with 0.25 times the stim brightness is likely to have a flux to the order of ~700 mJy, assuming a stim "flux" of ~3 Jy suggested in Chad's report of Mkr 279 observations (Fig 5 in mips-924 Cam R here).
If we assume that the source has 20 Jy, and corresponds to ~5 stims, and that the fake sources has at most 700 mJy flux, then the fake source corresponds to ~ 4% of the source flux.

decay"
Decay after Saturation: plus: after the saturating source; star: before the source (effect of PSF). Source 2 might have a 160 flux of ~15 to 20 Jy.

Conclusions

70 microns
No saturation is observed, up to a 10.3 Jy source.
No transient effect is observed at all after observing these bright sources.
Saturation level is larger than 10.3 Jy in 3s at 70 microns (lower limit), which is at least 3 times
larger than UofA predictions (4.4 Jy), and at least 8 times larger than SSC predictions (1.3 Jy).

160 microns
Saturation is observed in most of the sources, from reads 4 to 20 depending on the source flux.
In scan maps, the saturation occurs earlier in the DCE in the return leg, likely because of responsivity increase.
Strong saturation generates a decay, lasting about 20 seconds in the worst case, and with an amplitude of ~4% of the source.


Output and Deliverable Products

None

Actions Following Analysis

None # tar -cvf mips-210.tar mips-210R.analysis.php mips-210-decay_at_160.png mips-210R_scans.html slide*