Infrared Photometry Of Asteroids In The Spitzer FLS And SWIRE Programs

Details Infrared Photometry Of Asteroids In The Spitzer FLS And SWIRE Programs Infrared Photometry Of Asteroids In The Spitzer FLS And SWIRE Programs

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.5914r&link_type=abstract

American Astronomical Society, DPS meeting #38, #59.14; Bulletin of the American Astronomical Society, Vol. 38, p.595

Astronomy and Astrophysics

Astronomy

Scientific paper

We present photometric analysis of asteroids observed in the Spitzer First Look Survey- Ecliptic Plane (FLS, cf., Meadows et al. 2004, ApJS 154, 469) and the Spitzer Wide-area Infrared Extragalactic Survey (SWIRE, cf., Lonsdale et al., 2003, PASP, 115, 897). Initial analysis of the SWIRE data in the XMM-LSS field centered at an ecliptic latitude of -17.5 degrees revealed detections of 39 asteroids which were present in two epochs of data. Of the 39 asteroids detected, only 15 correspond to asteroids detected in ground based surveys. This new result yields a new estimate of 4.23 asteroids per square degree at the ecliptic latitude of -17.5 degrees. The mean flux values for the SWIRE asteroids in IRAC channel 4 (which corresponds to 8.0 microns) are at least 2 times greater than the values for the asteroids found in the FLS field at 0 and + 5 degrees ecliptic latitude. We present photometric results for both programs and also analyse the asteroids position in color space relative to other astronomical objects and will discuss possible future significance for the WISE mission.
This work supported in part by NASA Planetary Astronomy Grant RTOP 344-32-21-04

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