| CAID: MIPS-917 | Title: 24 um Flat - routine, Phot AOR | |
| System: MIPS | Principal: aalonso | Deputy: sstolovy |
| Objective: | To obtain IOC acceptable 24um photometry flat fields to be used on a regular basis. This activity is a companion to the 24 um Scan ROUTINE Phot AOR. The pair of activities will allow us to determine the relative efficiency and quality of flatfields created using scan and photometry AORs. |
| Description: | A 4 point dither map (1 cycle) will be obtained with 3 second DCEs in a region of the sky chosen to avoid bright point sources. The offsets between positions are 400 arcseconds. At each position of the dither pattern there will be 14 images, so a total of 54 images will be obtained each time the task is executed. The map will require about 10.3 minutes of observing time. |
| Day: 33.0284722222277 | Suggested Order: | ||
| Must be preceded by these activities (list by CAID): MIPS-320 | |||
| Place in Schedule: Start of each campaign that requires flat fields at this wavelength and in photometry mode. 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: Critical | |||
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: | |||
Duration: 11 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 119.6 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): use phot mode AORs | |||
| List Analysis tools required (downlink): standard pipeline | |||
| Estimate of data turn around: 24 hours | |||
| Description: A 24um flat flatfield to be used in photometry mode | |||
| 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.ed FPS and AOT validation data sets have source signal independent of position in image. | |||
| Contingency plan: | |||
Comments | |||
| References: | |||
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Additional Comments:
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| This activity last updated: 6/4/2002 11:44:18 AM | |||