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Deep u*- and g-Band Imaging of the Spitzer Space Telescope First Look Survey Field: Observations and Source Catalogs

Shim, Hyunjin and Im, Myungshin and Pak, Soojong and Choi, Philip and Fadda, Dario and Helou, George and Storrie-Lombardi, Lisa (2006) Deep u*- and g-Band Imaging of the Spitzer Space Telescope First Look Survey Field: Observations and Source Catalogs. Astrophysical Journal Supplement Series, 164 (2). pp. 435-449. ISSN 0067-0049. doi:10.1086/503709.

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We present deep u*- and g-band images taken with the MegaCam on the 3.6 m Canada-France-Hawai'i Telescope to support the extragalactic component of the Spitzer First Look Survey (FLS). In this paper we outline the observations, present source catalogs, and characterize the completeness, reliability, astrometric accuracy, and number counts of this data set. In the central 1 deg^2 region of the FLS, we reach depths of g ~ 26.5 mag and u* ~ 26.2 mag (AB magnitude, 5 σ detection over a 3'' aperture) with ~4 hr of exposure time for each filter. For the entire FLS region (~5 deg^2 coverage), we obtained u*-band images to the shallower depth of u* = 25.0-25.4 mag (5 σ, 3'' aperture). The average seeing of the observations is 0.”85 for the central field and ~1.”00 for the other fields. Astrometric calibration of the fields yields an absolute astrometric accuracy of 0.”15 when matched with the SDSS point sources between 18 < g < 22. Source catalogs have been created using SExtractor. The catalogs are 50% complete and >99.3% reliable down to g ≃ 26.5 mag and u* ≃26.2 mag for the central 1 deg^2 field. In the shallower u*-band images, the catalogs are 50% complete and 98.2% reliable down to 24.8-25.4 mag. These images and source catalogs will serve as a useful resource for studying the galaxy evolution using the FLS data.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Im, Myungshin0000-0002-8537-6714
Fadda, Dario0000-0002-3698-7076
Helou, George0000-0003-3367-3415
Storrie-Lombardi, Lisa0000-0002-5987-5210
Additional Information:© 2006 The American Astronomical Society. Received 2006 January 31; accepted 2006 February 24. We acknowledge the FLS members for their support on this program, and Luc Simard and Tom Soifer for helping us to prepare the CFHT proposal. This work was supported by the University-Institute Cooperative Research Fund from the Korea Astronomy and Space Science Institute, and grant R01-2005-000-10610-0 from the Basic Research Program of the Korea Science and Engineering Foundation. We also acknowledge the hospitality of the Korean Institute of Advanced Study during the final stage of this work, and the support from the School of Earth and Environmental Sciences Brain Korea 21 program at Seoul National University. Facilities: CFHT(MegaCam).
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Korea Astronomy and Space Science Institute (KASI)UNSPECIFIED
Korea Science and Engineering FoundationR01-2005-000-10610-0
Seoul National UniversityUNSPECIFIED
Subject Keywords:catalogs — galaxies: photometry — surveys
Issue or Number:2
Record Number:CaltechAUTHORS:20170328-081530065
Persistent URL:
Official Citation:Hyunjin Shim et al 2006 ApJS 164 435
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75461
Deposited By: Tony Diaz
Deposited On:28 Mar 2017 15:53
Last Modified:15 Nov 2021 16:33

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