MOONS is a multi-object spectrograph that will be installed at the Nasmyth focus of the VLT ESO Telescopes in Chile. The instrument has approximately 1000 fibers over a field of view of 500 square arcminutes, with wavelength coverage from 0.6 to 1.8 um using CCDs and NIR detectors. Four of the six f/0.95 Schmidt cameras are dedicated to the NIR wavebands and are fitted with H4RG-15 detectors....
Image persistence in HAWAII-2RG HgCdTe detectors has been observed by multiple parties. Also known as latent signal, this effect occurs when sensor images following an illumination show a decayed form of the illuminated image even though the source has been removed and the detector has been reset. Using data from an engineering grade detector delivered for SPHEREx testing illuminated with a...
I will present preliminary results from the SuperBIT balloon-borne experiment - a 0.5 meter near-ultraviolet to near-infrared telescope with a Sony IMX 455 CMOS sensor designed to perform diffraction-limited imaging from the stratosphere. SuperBIT observed 30 galaxy clusters during its 45-night flight on a NASA superpressure balloon in the spring of 2023. I will discuss sensor...
The e2v and ITL CCDs used in Rubin Observatory's LSST-CAM are tested under realistic LSST f/1.2 optical beam in a lab setup. In the past this facility has been used to characterize these CCDs, exploring the systematic errors due to charge transport. Now this facility is being used to optimize the clocking scheme and voltages. The effect of different sequencers on the on-chip systematics such...
The Vera C. Rubin Observatory will perform the 10-year Legacy Survey of Space and Time using the 3.2-gigapixel LSST Camera that consists of 189 science CCDs. Each of the back-illuminated deep depletion 16-megapixel CCDs consists of 16 segments corresponding to independent video channels that are readout in parallel. Using the LSST Beam Simulator at UC Davis, we characterized the...
The focal plane of the LSST Camera for the Vera C. Rubin Observatory consists of 189 science CCD sensors and sensors for guiding (8) and wavefront sensing (4). The science sensors are deep-depletion and back-illuminated 4k x 4k CCDs with segmentation of 16 channels, manufactured by both Imaging Technology Laboratory (ITL; ITL STA3800) and Teledyne E2V (E2V CCD250). Three CCDs are grouped and...
