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ребенок жалуется на боли в яичках к кому обращаться, [2403.05242] The Simons Observatory: impact of bandpass, polarization , The Simons Observatory: impact of bandpass, polarization angle and , The Dark Energy Survey Camera (DECam) - indico.cern.ch, DES Year 3 Cosmology Results: Papers - Dark Energy Survey, Dark Energy Survey - Wikipedia, Measuring the Small-Scale Matter Power Spectrum with High-Resolution , Status of the Dark Energy Survey Camera (DECam) Project.
Abstract:We study the effects due to mismatches in passbands, polarization angles, and temperature and polarization calibrations in the context of the upcoming cosmic microwave background experiment Simons Observatory (SO). Using the SO multi-frequency likelihood, we estimate the bias and the degradation of constraining power in cosmological and astrophysical foreground parameters assuming different levels of knowledge of the instrumental effects. We find that incorrect but reasonable assumptions about the values of all the systematics examined here can have significant effects on cosmological analyses, hence requiring marginalization approaches at the likelihood level. When doing so, we find that the most relevant effect is due to bandpass shifts. When marginalizing over them, the posteriors of parameters describing astrophysical microwave foregrounds (such as radio point sources or dust) get degraded, while cosmological parameters constraints are not significantly affected. Marginalization over polarization angles with up to 0.25$^\circ$ uncertainty causes an irrelevant bias $\lesssim 0.05 \sigma$ in all parameters. Marginalization over calibration factors in polarization broadens the constraints on the effective number of relativistic degrees of freedom $N_\mathrm{eff}$ by a factor 1.2, interpreted here as a proxy parameter for non standard model physics targeted by high-resolution CMB measurements., We study the effects due to mismatches in passbands, polarization angles, and temperature and polarization calibrations in the context of the upcoming cosmic microwave background experiment Simons Observatory (SO)., This work addresses a number of instrumental systematic efects important for the characterization of the SO small-scale data, targeted by the SO Large Aperture Telescope (LAT). We cover the impact of uncertainty in the frequency passbands, miscalibration and polarization angles mismatches..
Commissioning & Mechanical Infrastructure Secondary Mirror (f/8) Handling System, tested at FNAL, is now installed at CTIO DECam Imager Handling System being used to install the imager into the Cage, Our uncertainties on the mean redshift range from 0.003 to 0.008 and our uncertainties on the width range from 4 to 9%. We discuss how these results calibrate the redshift distributions used in companion DES Year-3 papers., DECam, short for the Dark Energy Camera, is a large camera built to replace the previous prime focus camera on the Victor M. Blanco Telescope. The camera consists of three major components: mechanics, optics, and CCDs., Small-Scale CDM Problems? CDM works well on scales larger than 10 kpc, but seems to fail on smaller scales (maybe): Missing Dark Matter Satellites? Cores vs cusps? Too-big to fail? Too much diversity?, The DECam project first concentrated on the CCD fabrication and assembly and on the design and fabrication of the optical elements as these were identified as the highest risk (technical, cost and schedule) and longest lead-time aspects of the project., Using a higher power lamp to increase the throughput of the system is not a good solution because higher power lamps tend to have proportionally bigger coils and lower surface brightness..