| CAID: MIPS-145 | Title: SED Mode Wavelength Calibration | |
| System: MIPS | Principal: psmith | Deputy: |
| Objective: | To confirm the wavelength calibration of the MIPS SED mode. |
| Description: | Two cycles of the SED AOT will be executed on four targets, 2 each of planetary nebulae (bright line at 63 microns) and HII regions (bright line at 88 microns). This will confirm both the zero point and the dispersion of the SED mode. Two different wavelengths are necessary to check the dispersion, and duplicate targets are required to guard against poor (or no) detections in one source. Ideally, the sources for this observation should be extended by at least a few arcminutes on the sky. |
| Day: 53.2055555555562 | Suggested Order: K100 | ||
| Must be preceded by these activities (list by CAID): MIPS-139, MIPS-300 | |||
| Place in Schedule: After dust cover off and slit location determined. | |||
| Priority: Critical | |||
Conditions | |||
| Maximum telescope temperature: | 12 K | ||
| Minimum telescope temperature: | 5.5 K | ||
| Should activity be repeated if focus changes? | No Repeat if focus changes by 0 mm | ||
| Maximum absolute pointing uncertainty: | 5 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 3 arcsec (1 sigma radial) | ||
| Observatory configuration: | standard | ||
| Go/No Go criteria: | CSMM and CE nominal. | ||
Duration: 40 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 80 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): SED AOT | |||
| List Analysis tools required (downlink): Standard analysis tools like IRAF and IDL. | |||
| Estimate of data turn around: 48 hours | |||
| Description: Spectra of 2 different kinds of sources will provide spectral lines at 2 different wavelengths which will be used to confirm the zero point and dispersion of SED mode. | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: Data analysis | |||
| Success criteria: The 4 spectra give consistent results for zero point and dispersion. | |||
| Contingency plan: Repeat with another HII region or PN, integrate longer. | |||
Comments | |||
| References: | |||
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Additional Comments:
Since the SED mode will not be immediately released, this test can be delayed until after IOC. IOC critical (N) S/C pointing understood to <3" (TBR) and stable to 0.5" in 500 sec (TBR) For 70 um performance, the backgrd radiance must be less than 1.0E-12 W/cm2/sr (< 12 K). Need suitable HII region in OPZ. Candidates for a December launch are NGC 7538A, NGC 3576, NGC 3603, NGC 3132, NGC 7139, NGC 6543 (in CVZ), NGC 650 G298.22-0.34 & 30 Dor (in CVZ). 5 min per AOT execution. Pointing and tracking specs listed in above comment can probably be relaxed somewhat for this IOC activity. PSS 11/16/01. | |||
| This activity last updated: 6/15/2002 2:42:16 PM | |||