| CAID: MIPS-299 | Title: SED Slit Illumination Function | |
| System: MIPS | Principal: psmith | Deputy: |
| Objective: | To determine the SED-mode slit illumination function. |
| Description: | The activity will determine the slit illumination by observing several sky positions in a region of high 70um background. The SED-mode AOT will be executed with 10 sec integration times at several telescope positions containing no bright point sources. A median of these observations will be made to average out spatial structure in the background. Each SED AOT provides 4 sky positions. The telescope can be moved to 4 positions using the SED mapping mode. In this case, the moves should be made in the cross-dispersion direction by an amount equal to the length of the slit (about 4.5 arcmin; this is the maximum offset allowed in the SED mapping-mode AOT). Sky regions chosen for 70um photometry-mode flat fields should be adequate for this task. |
| Day: 68.2243055555591 | Suggested Order: K100 | ||
| Must be preceded by these activities (list by CAID): | |||
| Place in Schedule: After aperture door open, CTA/instrument cooldown. | |||
| Priority: Necessary | |||
Conditions | |||
| Maximum telescope temperature: | 12 K | ||
| Minimum telescope temperature: | 5.5 K | ||
| Should activity be repeated if focus changes? | Yes Repeat if focus changes by 0 mm | ||
| Maximum absolute pointing uncertainty: | 10 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 5 arcsec (1 sigma radial) | ||
| Observatory configuration: | standard | ||
| Go/No Go criteria: | CSMM and CE nominal. | ||
Duration: 20 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 100 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): SED AOT | |||
| List Analysis tools required (downlink): IRAF or IDL | |||
| Estimate of data turn around: 48 hours | |||
| Description: A median of several sky positions will be constructed. The median sky will be divided by the pixel response to yield the slit illumination function. | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: Data analysis. | |||
| Success criteria: S/N high enough to fit data in the spatial direction to produce the slit illumination function. | |||
| Contingency plan: Reobserve brighter region of sky or increase exposure time. | |||
Comments | |||
| References: | |||
|
Additional Comments:
This task revised after the MIPS IOC planning/ review meeting held at Steward Observatory on 05/15/2002. | |||
| This activity last updated: 6/8/2002 5:30:50 PM | |||