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MIPS : Data: 70 um sensitivity tests |
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Spitzer 70 um Confusion and SensitivityVersion 1, 2006-Jan-18Deep observations of HDF-N constrain the confusion level for the MIPS-70 band. The sensitivity for short integration times are consistent with previous measurements (7.2 mJy for 5 sigma in 500 seconds on-source in a low background), and the instrument noise integrates down with nearly square root(t) for long integration times (10ks) for the low background HDF-N field. The sensitivity at intermediate and higher backgrounds is currently being investigated. See our internal report: Frayer 2006.
Spitzer 70 um Warm Campaign Sensitivity testsAs part of the MIPS calibration program and as a continuous effort to characterize the range of operating temperatures for the MIPS 70um array, we released 17hrs of observations of the Extragalactic FLS taken in May 2005 at a primary mirror temperature of approx 9.5K (in contrast with the 5.6K normal operating temperature). The data cover a region of 2 square degrees at 24 and 70um (with 160um being completely saturated). The program with these AORs is 1862, and the AOR labels are "xFLS-N", where N goes from 1 to 6.Part 1, Version 1, 2005-Jun-16 The first part of this analysis reports that the 70um data at this higher temperature is noisier by 4% to 13% (Frayer et al. 2005), but no adverse effects were found at 24um. This full report can be found in Frayer et al. 2005 (internal report). Part 2, Version 2, 2005-Oct-27 This part updates the sensitivity report, including the results for all of the extragalactic FLS data (original xFLS data, warm 9.5 K test data, cold-compressed and cold-uncompressed data, and warm 8.5 K test data). In summary, we find no measurable change in sensitivity of the MIPS-70 band as a function of temperature below 8.5 K. This full report can be found in Frayer et al. 2006 (internal report).
For more information, see the MIPS chapter of the SOM
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help@spitzer.caltech.edu http://ssc.spitzer.caltech.edu/mips/70um.html
