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The optical performance of the PILOT instrument from ground end-to-end tests

Misawa, R., Bernard, J-Ph., Longval, Y., Ristorcelli, I., Ade, Peter A. R., Alina, D., André, Y., Aumont, J., Bautista, L., de Bernardis, P., Boulade, O., Bousqet, F., Bouzit, M., Buttice, V., Caillat, A., Chaigneau, M., Charra, M., Crane, B., Douchin, F., Doumayrou, E., Dubois, J. P., Engel, C., Griffin, Matthew Joseph, Foenard, G., Grabarnik, S., Hargrave, P., Hughes, A., Laureijs, R., Leriche, B., Maestre, S., Maffei, B., Marty, C., Marty, W., Masi, S., Montel, J., Montier, L., Mot, B., Narbonne, J., Pajot, F., Pérot, E., Pimentao, J., Pisano, Giampaolo, Ponthieu, N., Rodriguez, L., Roudil, G., Salatino, M., Savini, G., Simonella, O., Saccoccio, M., Tauber, J. and Tucker, Carole 2017. The optical performance of the PILOT instrument from ground end-to-end tests. Experimental Astronomy 43 (3) , pp. 211-235. 10.1007/s10686-017-9528-3

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Abstract

The Polarized Instrument for Long-wavelength Observation of the Tenuous interstellar medium (PILOT) is a balloon-borne astronomy experiment designed to study the linear polarization of thermal dust emission in two photometric bands centred at wavelengths 240 μm (1.2 THz) and 550 μm (545 GHz), with an angular resolution of a few arcminutes. Several end-to-end tests of the instrument were performed on the ground between 2012 and 2014, in order to prepare for the first scientific flight of the experiment that took place in September 2015 from Timmins, Ontario, Canada. This paper presents the results of those tests, focussing on an evaluation of the instrument’s optical performance. We quantify image quality across the extent of the focal plane, and describe the tests that we conducted to determine the focal plane geometry, the optimal focus position, and sources of internal straylight. We present estimates of the detector response, obtained using an internal calibration source, and estimates of the background intensity and background polarization.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Springer
ISSN: 0922-6435
Funders: Science and Technology Facilites Council (STFC)
Date of First Compliant Deposit: 7 June 2017
Date of Acceptance: 3 February 2017
Last Modified: 08 May 2018 21:31
URI: http://orca-mwe.cf.ac.uk/id/eprint/101292

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