González-Nuevo, J. and Vieira, J. D. (2010) Herschel-ATLAS: Blazars in the science demonstration phase field. Astronomy and Astrophysics, 518 . L38. ISSN 0004-6361 http://resolver.caltech.edu/CaltechAUTHORS:20101117-104352774
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To investigate the poorly constrained sub-mm counts and spectral properties of blazars we searched for these in the Herschel-ATLAS (H-ATLAS) science demonstration phase (SDP) survey catalog. We cross-matched 500 μm sources brighter than 50 mJy with the FIRST radio catalogue. We found two blazars, both previously known. Our study is among the first blind blazar searches at sub-mm wavelengths, i.e., in the spectral regime where little is still known about the blazar SEDs, but where the synchrotron peak of the most luminous blazars is expected to occur. Our early results are consistent with educated extrapolations of lower frequency counts and question indications of substantial spectral curvature downwards and of spectral upturns at mm wavelengths. One of the two blazars is identified with a Fermi/LAT γ-ray source and a WMAP source. The physical parameters of the two blazars are briefly discussed. These observations demonstrate that the H-ATLAS survey will provide key information about the physics of blazars and their contribution to sub-mm counts.
|Additional Information:||© 2010 ESO. Received 31 March 2010; Accepted 5 May 2010; Published online 16 July 2010. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. We are grateful to the referee, P. Padovani, for very useful comments. Thanks are due to the PACO collaboration for having made available the data on the 2 blazars. M.M. and L.B. thanks the staff at the Australia Telescope Compact Array site, Narrabri (NSW), for the valuable support they provide in running the telescope. Work partially supported by the Italian Space Agency (contract I/016/07/0 “COFIS” and ASI/INAF Agreement I/072/09/0 for the Planck LFI Activity of Phase E2). This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.|
|Subject Keywords:||BL Lacertae objects: general; quasars: general; submillimeter: general|
|Official Citation:||Herschel-ATLAS: Blazars in the science demonstration phase field J. González-Nuevo, G. De Zotti, P. Andreani, E. J. Barton, F. Bertoldi, M. Birkinshaw, L. Bonavera, S. Buttiglione, J. Cooke, A. Cooray, G. Danese, L. Dunne, S. Eales, L. Fan, M. J. Jarvis, H.-R. Klöckner, E. Hatziminaoglou, D. Herranz, D. H. Hughes, A. Lapi, A. Lawrence, L. Leeuw, M. Lopez-Caniego, M. Massardi, T. Mauch, M. J. Michałowski, M. Negrello, S. Rawlings, G. Rodighiero, S. Samui, S. Serjeant, J. D. Vieira, G. White, A. Amblard, R. Auld, M. Baes, D. G. Bonfield, D. Burgarella, A. Cava, D. L. Clements, A. Dariush, S. Dye, D. Frayer, J. Fritz, E. Ibar, R. J. Ivison, G. Lagache, S. Maddox, E. Pascale, M. Pohlen, E. Rigby, B. Sibthorpe, D. J. B. Smith, P. Temi, M. Thompson, I. Valtchanov and A. Verma A&A 518 L38 (2010) DOI: 10.1051/0004-6361/201014637|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||17 Nov 2010 19:05|
|Last Modified:||26 Dec 2012 12:39|
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