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arXiv: 1005.2207

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HerMES: The SPIRE confusion limit

H. T. Nguyen 1, 2, B. Schulz, L. Levenson, A. Amblard, V. Arumugam, H. Aussel 3, T. Babbedge, A. Blain, J. Bock, A. Boselli 4, V. Buat 4, N. Castro-Rodriguez, A. Cava 3, P. Chanial 5, E. Chapin, D. L. Clements, A. Conley 6, L. Conversi, A. Cooray, C. D. Dowell 3, E. Dwek, S. Eales, D. Elbaz 7, M. Fox, A. Franceschini 8, W. Gear, J. Glenn, M. Griffin 9, M. Halpern, E. Hatziminaoglou 3, E. Ibar, K. Isaak, R. J. Ivison 10, G. Lagache, N. Lu 11, S. Madden, B. Maffei, G. Mainetti, L. Marchetti 12, 13, G. Marsden, J. Marshall, B. O'Halloran, S. J. Oliver, A. Omont 14, M. J. Page 15, P. Panuzzo, A. Papageorgiou, C. P. Pearson 16, I. Perez-Fournon, M. Pohlen, N. Rangwala, D. Rigopoulou, D. Rizzo, I. G. Roseboom, M. Rowan-Robinson, Douglas Scott, N. Seymour, D. L. Shupe, A. J. Smith 17, J. A. Stevens, M. Symeonidis, M. Trichas, K. E. Tugwell, M. Vaccari, I. Valtchanov 3, L. Vigroux, L. Wang, R. Ward, D. Wiebe, G. Wright, C. K. Xu 18, M. Zemcov 3

(2010-05-12)

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 microns, 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.

1:	Laboratoire de photonique et de nanostructures (LPN)
	CNRS : UPR20
2:	Centre de recherches Paul Pascal (CRPP)
	CNRS : UPR8641
3:	Autres
	AUTRE
4:	Laboratoire d'Astrophysique de Marseille (LAM)
	CNRS : UMR6110 – INSU – Université de Provence - Aix-Marseille I
5:	Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA)
	CEA : DSM/DAPNIA
6:	Department of Astronomy and Astrophysics
	University of Toronto
7:	Astrophysics
	CEA
8:	Laboratoire Colloïdes et Matériaux Divisés (LCMD)
	CNRS : UMR7195 – ESPCI ParisTech
9:	School of Physics & Astronomy
	Cardiff University
10:	Royal Observatory Edinburgh
	Royal Observatory Edinburgh
11:	Division of Engineering
	Colorado School of Mines
12:	Service de Chimie Physique (SCP)
	CEA : DEN/DPC/SCP
13:	Science et Ingénierie des Matériaux et Procédés (SIMAP)
	CNRS : UMR5266 – Université Joseph Fourier - Grenoble I – Institut National Polytechnique de Grenoble (INPG)
14:	Institut d'Astrophysique de Paris (IAP)
	CNRS : UMR7095 – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI
15:	Department of Chemistry and Biochemistry
	University of California at Los Angeles
16:	National Institute of Water and Atmospheric Research
	National Institute of Water and Atmospheric Research
17:	British Antarctic Survey (BAS)
	Natural Environment Research Council
18:	Laboratoire de Mathématiques Raphaël Salem (LMRS)
	CNRS : UMR6085 – Université de Rouen

Subject

:

Sciences of the Universe/Astrophysics/Galactic Astrophysics Physics/Astrophysics/Galactic Astrophysics

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From: Catherine Beaussier <>

Submitted on: Monday, 23 January 2012 12:29:34

Updated on: Monday, 30 January 2012 10:20:37