<? echo "MIPS-$caid, Campaign $campn IOC/SV Analysis"; ?>

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

DATA STATUS: Nominal
TASK OUTCOME: Nominal

Abstract

This is the first execution of a task designed to provide a flux calibration at 160µm based on asteroids. The targets are observed at both 70µm and 160µm, and a spectral model for the asteroids is used to transfer the 70µm calibration to 160µm. The targets were Amicitia, Devosa, Fuji, and Sulamitis. The data were obtained as expected, and all the asteroids were detected at 70µm and 3 of the 4 were detected at 160µm. The derived calibration factor at 160µm is 1215±148µJy/arcsec²/(MIPS₁₆₀Unit, which can be compared to the value of 567µJy/arcsec²/(MIPS₁₆₀Unit) crudely derived from mips-924 data from campaign V and other sources (see the mips-924V writeup for details).

Analysis

All data were processed with version 2.50 of the DAT, turning off the electronic nonlinearity correction and using the calibration files specific to campaign R. The 70µm and 160µm data were processed as described in the mips-922 and mips-924 writeups, respectively.

Results

Figure 1: 70/160µm images of Amicitia. This target was not detected at 160µm.

Figure 2: 70/160µm images of Devosa.

Figure 3: 70/160µm images of Fuji.

Figure 4: 70/160µm images of Sulamitis.

The calibration factor (in units of µJy/arcsec²/(MIPS₁₆₀Unit)) was calculated from three sources, as follows: The 70µm observations were reduced and calibrated using the standard calibration factor (1.49×10⁴ µJy/arcsec²/MIPS₇₀Unit). The results were divided by a color correction appropriate to the temperature of the source (assumed to be 250 K for all sources). This quantity for each target is the one labeled "Measured 70µm Flux" in the table below. The results were then scaled to 160µm using a flux ratio derived from the same model which produced the flux predictions. These results were then multiplied by the appropriate color correction factor to put them back on the 10,000K blackbody scale used by the other bands. This quantity for each target is referred to as the "transfer" prediction in the table below. These predictions were then compared to the measured counts to determine the calibration factor. Conversion between surface brightness and integrated flux units were done assuming a pixel scale of 9.89 arcsec. at 70µm and 16.0 arcsec. at 160µm.

The results are summarized in the following table:

Photometry

Target Predicted 70µm Flux (Model) Predicted 160µm Flux (Model) Predicted 70/160µm Flux Ratio Measured 70µm Data Measured 70µm Flux Predicted 160µm Flux (Transfer) Measured 160µm Data Calibration Factor

(Jy) (Jy)
(MIPS₇₀Unit) (Jy) (Jy) (MIPS₁₆₀Unit) (µJy/arcsec²/MIPS₁₆₀Unit)

Amicitia 0.278±0.035 0.077±0.007 3.59±0.11 0.106±0.015 0.159±0.023 0.044±0.007 ... ...

Devosa 4.421±0.566 1.229±0.119 3.59±0.12 3.083±0.027 4.632±0.041 1.281±0.045 3.75±0.16 1334±73.7

Fuji 0.506±0.054 0.141±0.018 3.59±0.08 0.291±0.018 0.437±0.027 0.121±0.008 0.54±0.15 875±250

Sulamitis 1.356±0.188 0.387±0.040 3.49±0.13 0.455±0.014 0.684±0.021 0.195±0.009 0.53±0.13 1437±359

A straight average of the results gives a calibration factor of 1215±148µJy/arcsec²/(MIPS₁₆₀Unit).

Conclusions

The calibration factor at 160µm was calculated by transferring the 70µm calibration to 160µm via asteroids observed in common.

Output and Deliverable Products

none