Spitzer 70 Micron Source Counts in GOODS-North
Creators
-
1.
California Institute of Technology
-
2.
NOIRLab
-
3.
CEA Saclay
-
4.
Space Telescope Science Institute
Abstract
We present ultradeep Spitzer 70 μm observations of GOODS-North (Great Observatories Origins Deep Survey). For the first time, the turnover in the 70 μm Euclidean-normalized differential source counts is observed. We derive source counts down to a flux density of 1.2 mJy. From the measured source counts and fluctuation analysis, we estimate a power-law approximation of the faint 70 μm source counts of dN/dS ∝ S^−1.6, consistent with that observed for the faint 24 μm sources. An extrapolation of the 70 μm source counts to zero flux density implies a total extragalactic background light (EBL) of 7.4 ± 1.9 nW m^−2 sr^−1. The source counts above 1.2 mJy account for about 60% of the estimated EBL. From fluctuation analysis, we derive a photometric confusion level of σc = 0.30 ± 0.15 mJy (q = 5) for the Spitzer 70 μm band.
Additional Information
© 2006. The American Astronomical Society. Received 2006 May 5; accepted 2006 June 26; published 2006 July 28. We thank our colleagues associated with the Spitzer mission who have made these observations possible. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407.Attached Files
Published - FRAapjl06b.pdf
Files
FRAapjl06b.pdf
Additional details
Identifiers
- Eprint ID
- 12739
- Resolver ID
- CaltechAUTHORS:FRAapjl06b
Funding
- NASA
- 1407
Dates
- Created
-
2008-12-22Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)