| CAID: MIPS-305 | Title: 24 um Flat - detailed, Scan AOR | |
| System: MIPS | Principal: aalonso | Deputy: SStolovy |
| Objective: | Acquire the data needed to produce flatfield frames (24um). Enough DCEs (~30) are taken at 33 scan-mirror positions to allow us to produce a flat for each scan-mirror position. If these individual flats are judged to be indistinguishable they can be combined to create a single flat. Perform the necessary data reduction (median-filtering) needed to create the flatfield frames. This activity is a companion to the ROUTINE Photometry and ROUTINE Scan AOR flatfield/illumination-correction activity. These activities will allow us to determine the relative efficiency and quality of flatfields created using scan and photometry AORs. |
| Description: | A 5-degree long x 3 legs scan map is taken using the fast-scan AOT in a region of sky chosen to avoid bright point-sources. The map will require about 65.9 minutes of observing time. |
| Day: 68.2381944444496 | Suggested Order: Q100 | ||
| Must be preceded by these activities (list by CAID): MIPS-329, MIPS-914, MIPS-917 | |||
| Place in Schedule: MIPS CE, CSMM, stim operation nominal. CTA temperature within range, and MIPS temperature stable. 24um background falls below 1% of 25MJy/sr, the medium sky background level, at 25K, so it should be possible to obtain good data for this activity for CTA temperatures below that even if the CTA temperature is changing. | |||
| Priority: Necessary | |||
Conditions | |||
| Maximum telescope temperature: | 33 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: | 3 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 1 arcsec (1 sigma radial) | ||
| Observatory configuration: | standard | ||
| Go/No Go criteria: | CSMM, CE, and stims and detectors must be operational, instrument and telescope temperatures must be stable | ||
Duration: 66 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 810.1 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): Use scan map AORS. | |||
| List Analysis tools required (downlink): standard pipeline | |||
| Estimate of data turn around: 24 hours | |||
| Description: Flats for 24um array at all scan-mirror positions visited during scan-map. Flats from individual CSMM positions compared. | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: data analysis | |||
| Success criteria: Flats/I.C.s display no noticeable source residuals, have good S/N. Flattened/I.C.d FPS and AOT validation data sets have source signal independent of postion in image. | |||
| Contingency plan: Can use flats from ground-test data as a start; Must obtain good sky flats during IOC, though. | |||
Comments | |||
| References: | |||
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Additional Comments:
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| This activity last updated: 11/16/2001 1:53:44 PM | |||