| CAID: MIPS-315 | Title: Behavior as Function of Sky Background | |
| System: MIPS | Principal: dhines | Deputy: cengelbracht, dfrayer, SStolovy |
| Objective: | Determine whether latent image behavior, responsivity, and photometric stability have any dependence on sky background levels. |
| Description: | The goal of this task is to check the behavior of point sources as a function of sky background. Sources should be choosen such that they are bright, but do not saturate. These measurements should be limited by systematics and not the S/N of the sources. Outline of the Task: At 24um (for each of the three 24um sources = 3 different backgrounds):Construct a medium mode scan map including both forward and reverse scans. 2 scan legs at medium mode scan rate (forward and backward) 1 cycle of 10-second exposures using the Photmetry AOT at 24um. At 70um (for each of the three 70um sources = 3 different backgrounds): Construct a medium mode scan map including both forward and reverse scans. 2 scan legs at medium mode scan rate (forward and backward) 1 cycle of 10-second exposures using the Photmetry AOT at 70um. At 160um (for each of the three 160um sources = 3 different backgrounds): Construct a medium mode scan map including both forward and reverse scans. 2 scan legs at medium mode scan rate (forward and backward) 1 cycle of 10-second exposures using the Photmetry AOT at 160um. Targets will be chosen from the calibrator list in the MIPS SDD. |
| Day: 77.9937500000087 | Suggested Order: R750 | ||
| Must be preceded by these activities (list by CAID): MIPS-320, MIPS-322, MIPS-324, MIPS-326, MIPS-350 | |||
| Place in Schedule: This test should be done near the end of IOC as it is a pretty high level validation of the instrument. | |||
| Priority: Desired | |||
Conditions | |||
| Maximum telescope temperature: | 6 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: | 1.4 arcsec (1 sigma radial) | ||
| Maximum precision offset uncertainty: | 1 arcsec (1 sigma radial) | ||
| Observatory configuration: | Standard | ||
| Go/No Go criteria: | Array temperatures must be stable, detectors must be functioning nominally | ||
Duration: 264 minutes
| | Real time downlink:
No | | |||
| Data Volume (uncompressed): 1261 Mbits | |||
| List Blocks, AORs, SERs, IERs, or unique sequences required (uplink): Photometry & Scan Map AOTs | |||
| List Analysis tools required (downlink): Standard MIPS data reduction pipeline plus extended product of Mosaicer. IDP3 will be used to extract point-source photometry. | |||
| Estimate of data turn around: 72 hours | |||
| Description: Run data through pipeline. Examine the repeatability of the point sources as a function of sky background. Examine the responsivity as a function of sky background. Examine the latents from the point sources and stim flashes as a function of sky background. None of the above sould depend on sky background or with mode (photometry or scan map) they were taken in. | |||
| Can proceed in parallel with other activity: No | |||
| Must outcome be confirmed before next activity: No | |||
| Method of Confirmation: data analysis... is dispersion in measured photometry consistent within expected uncertainties? If not, what are the effects? | |||
| Success criteria: Good enough data to measure the responivity, latents, and repeatability at all three sky levels for all three arrays. | |||
| Contingency plan: We might be able to investigate the behaviors of latents, responsivity, and repeatability as a function of sky background. | |||
Comments | |||
| References: MIPS SDD | |||
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Additional Comments:
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| This activity last updated: 7/2/2002 4:48:55 PM | |||