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HerMES: The SPIRE confusion limit

Nguyen, H. T., Schulz, B., Levenson, L., Amblard, A., Arumugam, V., Aussel, H., Babbedge, T., Blain, A., Bock, J., Boselli, A., Buat, V., Castro-Rodriguez, N., Cava, A., Chanial, P., Chapin, E., Clements, D. L., Conley, A., Conversi, L., Cooray, A., Dowell, C. D., Dwek, E., Eales, Stephen Anthony, Elbaz, D., Fox, M., Franceschini, A., Gear, Walter Kieran, Glenn, J., Griffin, Matthew Joseph, Halpern, M., Hatziminaoglou, E., Ibar, E., Isaak, Kate Gudrun, Ivison, R. J., Lagache, G., Lu, N., Madden, S., Maffei, B., Mainetti, G., Marchetti, L., Marsden, G., Marshall, J., O'Halloran, B., Oliver, S. J., Omont, A., Page, M. J., Panuzzo, P., Papageorgiou, Andreas, Pearson, C. P., Perez Fournon, I., Pohlen, Michael, Rangwala, N., Rigopoulou, D., Rizzo, D., Roseboom, I. G., Rowan-Robinson, M., Scott, D., Seymour, N., Shupe, D. L., Smith, A. J., Stevens, J. A., Symeonidis, M., Trichas, M., Tugwell, K. E., Vaccari, M., Valtchanov, I., Vigroux, L., Wang, L., Ward, R., Wiebe, D., Wright, G., Xu, C. K. and Zemcov, M. 2010. HerMES: The SPIRE confusion limit. Astronomy and Astrophysics 518 , L5. 10.1051/0004-6361/201014680

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Abstract

We report on the sensitivity of SPIRE photometers on the Herschel Space Observatory. Specifically, we measure the confusion noise from observations taken during the science demonstration phase of the Herschel Multi-tiered Extragalactic Survey. Confusion noise is defined to be the spatial variation of the sky intensity in the limit of infinite integration time, and is found to be consistent among the different fields in our survey at the level of 5.8, 6.3 and 6.8 mJy/beam at 250, 350 and 500 μm, respectively. These results, together with the measured instrument noise, may be used to estimate the integration time required for confusion limited maps, and provide a noise estimate for maps obtained by SPIRE.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: space vehicules: instruments / surveys / submillimeter: diffuse background / submillimiter: galaxies
Publisher: EDP Sciences
ISSN: 0004-6361
Last Modified: 04 Jun 2017 02:14
URI: http://orca.cf.ac.uk/id/eprint/11012

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