Questions tagged [charge-coupled-devices]
Questions about CCD-sensors, i.e. light-sensitive electronic devices based on the internal photoelectric effect.
What is the probability that a photon that enters the aperture is registered?
If I want to derive the probability that a photon that enters the aperture of a telescope is detected, how do I do that? This should be closely related to the quantum efficiency of a telescope, but ...
How often are electron-multiplying CCDs used in telescope focal planes? Will Nancy Grace Roman be the first use in a space telescope?
Section I. of The Wide Field Infrared Survey Telescope: 100 Hubbles for the 2020s says: Table 1 summarizes the WFIRST instrument suite, and Figure 1 presents the effective area of the Wide Field ...
What was the first use of time-delay integration in Astronomy? Are there instances before GAIA?
In the context of GAIA, time-delay integration is the clocking of a CCD's charge shift register at a frequency such that it matches the linear speed across the focal plane of the actual image. So even ...
Calibrating raw photometric measurements
So I have a photometry data sourced from Solar Mass Ejection Imager's (SMEI) server as an ‘add-on data’ for my point source of interest (a variable star) with a 104 minute cadence. However, it’s not ...
Why wasn't CHEOPS data taken during passage through the South Atlantic Anomaly downlinked in this case, resulting in gaps in photometry?
Section 4.1.2. CHEOPS in Six transiting planets and a chain of Laplace resonances in TOI-178 says Due to the low-Earth orbit of CHEOPS, the spacecraft-target line of sight was interrupted by Earth ...