CHAR-SURV-003: Sensitivity¶
Parent requirement¶
Cadence¶
Once, during PV phase.
Objective¶
The sensitivity of Euclid is a fundamental quantity for survey planning and exposure scaling, and is directly related to the photometric zeropoints. It is not a top-level scientific requirement, though. A single pass of the EDF-N and - if visible - the EDF-S should suffice.
Observations¶
Methodology / Uplink procedure¶
Targets and pointing constraints¶
Instrument configuration¶
Inter-operability constraints¶
Dependencies¶
Fulfilling¶
Fulfilled by¶
Time-critical¶
No
Validation¶
None.
Recovery¶
None.
In-orbit duration¶
Processing time¶
Processing input¶
Ground Processing Input Data:
Data Description:
Data volume¶
Processing tools¶
Standard wide-survey processing
Processing element¶
DataModel: https://gitlab.euclid-sgs.uk/
Quality control parameters¶
DataModel: https://gitlab.euclid-sgs.uk/
Required accuracy, constraints¶
Processing method¶
Processing output¶
Determine the number count histograms for each of Euclid’s four photometric channels, for point sources in individual images with a \({\rm SNR\ge5}\). The sensitivity is taken as the AB magnitude at which the number counts dropped to 50% of their peak value (effective 50% completeness limit).
This requires absolute photometric calibration.
Contact person¶
Calibration Lead
Status¶
2026/09/18 - In progress.
Comments¶