Chandra survey in the AKARI North Ecliptic Pole Deep Field - I. X-ray data, point-like source catalogue, sensitivity maps, and number counts

Mon. Not. R. Astron. Soc. 000, 1–?? (2015) Printed 25 March 2015 (MN LaTEX style file v2.2) arXiv:1409.7697v2 [astro-ph.HE] 24 Mar 2015 Chandra survey in the AKARI North Ecliptic Pole Deep Field. I. X-ray data, point-like source catalog, sensitivity maps, and number counts M. Krumpe, 1,3⋆ T. Miyaji, 2,3 H. Brunner, 4 H. Hanami, 5 T. Ishigaki, 5 T. Takagi, 6 A. G. Markowitz, 3,7 T. Goto, 8 M. A. Malkan, 9 H. Matsuhara, 6,10 C. Pearson, 11,12,13 Y. Ueda, 14 and T. Wada 6 1 European Southern Observatory, ESO Headquarters, Karl-Schwarzschild-Strase 2, 85748 Garching bei M¨ unchen, Germany de Astronom´ia, Universidad Nacional Aut´ onoma de M´ exico, Carret. Tijuana-Ensenada, Ensenada 22860, BC, Mexico (mailing addr. P.O. Box 439027, San Diego, CA, 92143, USA) 3 University of California, San Diego, Center for Astrophysics and Space Sciences, 9500 Gilman Dr., La Jolla, CA, 92093-0424, USA 4 Max-Planck-Institut f¨ ur extraterrestrische Physik, Giesenbachstrase, 85748 Garching bei M¨ unchen, Germany 5 Iwate University, 3-18-8 Ueda, Morioka, Iwate, 020-8550, Japan 6 Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 229-8510, Kanagawa, Japan 7 Karl Remeis Observatory and Erlangen Centre for Astroparticle Physics, Sternwartstrase 7, 96049 Bamberg, Germany; Alexander von Humboldt Fellow 8 Institute for Astronomy, University of Hawaii 2680 Woodlawn Drive, Honolulu, HI, 96822, USA 9 University of California, Los Angeles, Division of Astronomy & Astrophysics, 430 Portola Plaza, Los Angeles, CA, 90095-1547, USA 10 Department of Space and Astronautical Science, The Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa, 240-0193, Japan 11 RAL Space, STFC Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, UK 12 The Open University, Milton Keynes, MK7 6AA, UK 13 University of Oxford, Keble Rd, Oxford, OX1 3RH, UK 14 Department of Astronomy, Kyoto University, Kyoto, 606-8502, Japan 2 Instituto Released 2014 January 17 ABSTRACT We present data products from the 300 ks Chandra survey in the AKARI North Ecliptic Pole (NEP) deep field. This field has a unique set of 9-band infrared pho- tometry covering 2–24 µm from the AKARI Infrared Camera, including mid-infrared (MIR) bands not covered by Spitzer. The survey is one of the deepest ever achieved at ∼15 µm, and is by far the widest among those with similar depths in the MIR. This makes this field unique for the MIR-selection of AGN at z ∼ 1. We design a source detection procedure, which performs joint Maximum Likeli- hood PSF fits on all of our 15 mosaicked Chandra pointings covering an area of 0.34 deg 2 . The procedure has been highly optimized and tested by simulations. We provide a point source catalog with photometry and Bayesian-based 90 per cent confidence upper limits in the 0.5–7, 0.5–2, 2–7, 2–4, and 4–7 keV bands. The catalog contains 457 X-ray sources and the spurious fraction is estimated to be ∼1.7 per cent. Sensitivity and 90 per cent confidence upper flux limits maps in all bands are provided as well. We search for optical MIR counterparts in the central 0.25 deg 2 , where deep Sub- aru Suprime-Cam multiband images exist. Among the 377 X-ray sources detected there, ∼80 per cent have optical counterparts and ∼60 per cent also have AKARI mid-IR counterparts. We cross-match our X-ray sources with MIR-selected AGN from Hanami et al. Around 30 per cent of all AGN that have MID-IR SEDs purely explain- able by AGN activity are strong Compton-thick AGN candidates. Key words: methods: data analysis – surveys – galaxies: active – X-ray: galaxies. E-mail: mkrumpe@ucsd.edu c 2015 RAS INTRODUCTION The search for Compton-thick absorbed (CT) AGN and the quantification of their contribution to the total accretion