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NIKA2 mapping and cross-instrument SED extraction of extended sources with Scanamorphos

Roussel, H., Ponthieu, N., Adam, R., Ade, P. ORCID:, André, P., Andrianasolo, A., Aussel, H., Beelen, A., Benoît, A., Bideaud, A., Bourrion, O., Calvo, M., Catalano, A., Comis, B., De Petris, M., Désert, F.-X., Doyle, S. ORCID:, Driessen, E. F. C., Gomez, A., Goupy, J., Kéruzoré, F., Kramer, C., Ladjelate, B., Lagache, G., Leclercq, S., Lestrade, J.-F., Macías-Pérez, J.F., Mauskopf, P. ORCID:, Mayet, F., Monfardini, A., Perotto, L., Pisano, G. ORCID:, Revéret, V., Ritacco, A., Romero, C., Ruppin, F., Schuster, K., Shu, S., Sievers, A., Tucker, C. ORCID: and Zylka, R. 2020. NIKA2 mapping and cross-instrument SED extraction of extended sources with Scanamorphos. EPJ Web of Conferences 228 , 00024. 10.1051/epjconf/202022800024

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The steps taken to tailor to NIKA2 observations the Scanamorphos algorithm (initially developed to subtract low-frequency noise from Herschel on-the-fly observations) are described, focussing on the consequences of the different instrument architecture and observation strategy. The method, making the most extensive use of the redundancy built in the multi-scan coverage with large arrays of a given region of the sky, is applicable to extended sources, while the pipeline is so far optimized for compact sources. An example of application is given. A related tool to build consistent broadband SEDs from 60 microns to 2 mm, combining Herschel and NIKA2 data, has also been developed. Its main task is to process the data least affected by low-frequency noise and coverage limitations (i.e. the Herschel data) through the same transfer function as the NIKA2 data, simulating the same scan geometry and applying the same noise and atmospheric signal as extracted from the 1mm and 2mm data.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: EDP Sciences
ISSN: 2100-014X
Date of First Compliant Deposit: 10 March 2020
Date of Acceptance: 27 January 2020
Last Modified: 17 May 2023 21:09

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