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| === Goal: Carry out verification and performance tests of the 30 m telescope using NIKA2, after recoating of M1 === '''Essential issues to be tested:''' * Check the feasibility and correctness of NIKA2 observations in a first approach after the last stop * Test day/night behaviour of the beams * Photometry and RMS check using flux calibrators for estimating improvements '''Observations required:''' * Standard day/night point & focus sequences * A good statistics of calibration scans on selected planets and secondary flux calibrators (see visibility plot) * NIKA2 beam maps (stable conditions, ~30 min each); possible targets to be used: 2251+158, Uranus, 0316+413 * A new lateral focus session would be necessary (stable conditions, telescope relaxed; it takes about 3h) == Input documentation == * Scripts and source files are located in the ~/pako/Scripts_30mCommissioning_2024/ folder of the t22 account. == Staff == IRAM staff |
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'''Essential issues to be tested:''' '''Observations required:''' == Staff == Alessia Ritacco, Sofia Savorgnano, Ludovico Bizzarri, Pascal Morfin (on-site), Nicolas Ponthieu (remote) |
NIKA2 technical run #67 (pol) / August 2024
Back to the NIKA2 Run 67 (pol) main page
Goal:
This technical run is carried out in the framework of project COSMOCal, which aims to provide a space calibrator for polarization experiments, focusing on the absolute calibration of Cosmic Microwave Background experiments. The idea is to provide a very well known calibration, in particular of the polarization angle, of large aperture telescopes. Among the ones selected there is the IRAM 30m and NIKA2. Once very well calibrated they will map the Crab nebula and other reference sources to provide a reference for any polarization experiment on behalf of the whole community interested in precise polarization observations.
As one of the first steps, COSMOCal Team has developed and assembled a prototype focusing the NIKA2 camera and providing a system that can ensure a knowledge on the absolute polarization angle with a precision of <0.1 deg. More details can be find in a paper submitted by the Team: https://arxiv.org/abs/2405.12135
The first goal of this technical run (project T16-24) is to place that prototype on the top of Pico Veleta and perform observations with NIKA2 in polarization during this week.
Essential issues to be tested:
Observations required:
Staff
Alessia Ritacco, Sofia Savorgnano, Ludovico Bizzarri, Pascal Morfin (on-site), Nicolas Ponthieu (remote)