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    The Herschel Multi-Tiered Extragalactic Survey: Source extraction and cross-identifications in confusion-dominated SPIRE images

    Access Status
    Open access via publisher
    Authors
    Roseboom, I.
    Oliver, S.
    Kunz, M.
    Altieri, B.
    Amblard, A.
    Arumugam, V.
    Auld, R.
    Aussel, H.
    Babbedge, T.
    Béthermin, M.
    Blain, A.
    Bock, J.
    Boselli, A.
    Brisbin, D.
    Buat, V.
    Burgarella, D.
    Castro-Rodríguez, N.
    Cava, A.
    Chanial, P.
    Chapin, E.
    Clements, D.
    Conley, A.
    Conversi, L.
    Cooray, A.
    Dowell, C.
    Dwek, E.
    Dye, S.
    Eales, S.
    Elbaz, D.
    Farrah, D.
    Fox, M.
    Franceschini, A.
    Gear, W.
    Glenn, J.
    Solares, E.
    Griffin, M.
    Halpern, M.
    Harwit, M.
    Hatziminaoglou, E.
    Huang, J.
    Ibar, E.
    Isaak, K.
    Ivison, R.
    Lagache, G.
    Levenson, L.
    Lu, N.
    Madden, S.
    Maffei, B.
    Mainetti, G.
    Marchetti, L.
    Marsden, G.
    Mortier, A.
    Nguyen, H.
    O'Halloran, B.
    Omont, A.
    Page, M.
    Panuzzo, P.
    Papageorgiou, A.
    Patel, H.
    Pearson, C.
    Pérez-Fournon, I.
    Pohlen, M.
    Rawlings, J.
    Raymond, G.
    Rigopoulou, D.
    Rizzo, D.
    Rowan-Robinson, M.
    Portal, M.
    Schulz, B.
    Scott, D.
    Seymour, Nick
    Shupe, D.
    Smith, A.
    Stevens, J.
    Symeonidis, M.
    Trichas, M.
    Tugwell, K.
    Vaccari, M.
    Valtchanov, I.
    Vieira, J.
    Vigroux, L.
    Wang, L.
    Ward, R.
    Wright, G.
    Xu, C.
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Roseboom, I. and Oliver, S. and Kunz, M. and Altieri, B. and Amblard, A. and Arumugam, V. and Auld, R. et al. 2010. The Herschel Multi-Tiered Extragalactic Survey: Source extraction and cross-identifications in confusion-dominated SPIRE images. Monthly Notices of the Royal Astronomical Society. 409 (1): pp. 48-65.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1111/j.1365-2966.2010.17634.x
    ISSN
    0035-8711
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/19636
    Collection
    • Curtin Research Publications
    Abstract

    We present the cross-identification and source photometry techniques used to process Herschel SPIRE imaging taken as part of the Herschel Multi-Tiered Extragalactic Survey (HerMES). Cross-identifications are performed in map-space so as to minimize source-blending effects. We make use of a combination of linear inversion and model selection techniques to produce reliable cross-identification catalogues based on Spitzer MIPS 24-µm source positions. Testing on simulations and real Herschel observations shows that this approach gives robust results for even the faintest sources (S250~ 10 mJy). We apply our new technique to HerMES SPIRE observations taken as part of the science demonstration phase of Herschel. For our real SPIRE observations, we show that, for bright unconfused sources, our flux density estimates are in good agreement with those produced via more traditional point source detection methods (SUSSEXtractor) by Smith et al. When compared to the measured number density of sources in the SPIRE bands, we show that our method allows the recovery of a larger fraction of faint sources than these traditional methods. However, this completeness is heavily dependent on the relative depth of the existing 24-µm catalogues and SPIRE imaging. Using our deepest multiwavelength data set in the GOODS-N, we estimate that the use of shallow 24-µm catalogues in our other fields introduces an incompleteness at faint levels of between 20-40 per cent at 250 µm. © 2010 The Authors. Journal compilation © 2010 RAS.

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